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Agilent Technologies HP8648A User's Manual

1. MIC ACC VOLUME SQUELCH AUDIO OUT HI e oo G9 RF IN OUT 53 FM Transmitters Test Set Options Required Spectrum Analyzer Tracking Generator option 102 Required Additional Equipment Whip antenna CAUTION 54 Measurement Procedure 1 Connect the Antenna to the ANT IN connector Do not exceed the connector s rated input or permanent instrument damage may result On the Test Set 2 Press the PRESET key J If monitoring an FM broadcast signal perform the following steps a Press the TX key b Use the knob to change IF Filter to 230 KHz c Continued to step 3 CJ If not proceed to step 3 Using the knob and data entry keys 3 Select the SPEC ANL screen From the Controls select Ant Set Center Freq and Span fields to view desired spectrum Set Ref Level from 30 dBm to 50 dBm as required to view the desired signal oO UR FM Transmitters Once the desired carrier is found 10 From Controls select Main Select Marker from the Choices field Use the Marker To field to select the desired carrier On the Test Set frequency and level are displayed as shown SPECTRUM ANALYZER Level amp Frequency displayed To demodulate the carrier With the marker on the desired carrier select Marker To to Center Freq From Controls selec
2. MIC ACC VOLUME SQUELCH AUDIO OUT AUDIO IN RF INOUT DUPLEX OUT ANT IN TRANSMITTER UNDER TEST ANTENNA 191 Using the Spectrum Analyzer Test Set Options Required Spectrum Analyzer Tracking Generator option 102 CAUTION Measurement Procedure 1 Connect the signal input to the RF IN OUT or ANT IN connector Use the RF IN OUT connector for measuring Transmitter output or other high power signals e Use the ANT IN connector for all other low level signals provides higher sensitivity Do not exceed the connector s rated input or permanent instrument damage may result On the Test Set 2 Press the PRESET key Using the knob 3 4 5 Select SPEC ANL screen Select Controls field Continue the measurement by selecting a control screen from the list of choices and referring to the following e For sweep control see Measurements Using the Main Control Fields on page 193 e For marker positioning see Measurement Using the Marker Control Fields on page 194 e For input attenuation sensitivity and trace control see Measurements Using the Auxiliary Control Fields on page 195 192 Using the Spectrum Analyzer Measurements Using the Main Control Fields From Controls select RF In if the input signal is connected to the RF IN OUT connector e From Controls select Ant i
3. INCR 210 SET x10 7 LO LIMIT HILIMIT CURSOR CONTROL 2 YES ICANCEL ON OFF o The Test Set s Features The INCR 10 INCR SET and INCR X10 keys change the increment decrement field value units tens hundreds etc The B keys increment decrement field values select among various field choices or move the cursor within fields e The LO LIMIT and HI LIMIT keys set measurement limits for PASS FAIL indications AF and RF measurements The REF SET key sets or removes a measurement reference for relative The METER key enables disables the analog bar graph meter The AVG key enables disables measurement averaging 33 The Test Set s Features Knobs DATA FUNCTIONS gt REFSET METER AVG INCR INCR NCR 210 SET X10 LO LIMIT HI LIMIT CURSOR CONTROLE PUSH TO SELECT SHIFT CANCEL ON OFF MIC ACC VOLUME SQUELCH AL OUT ANT IN o0o The Cursor Control Knob Moves the cursor to another field rotate CW CCW e Selects fields screens and settings from a list of choices push Increments and decrements numeric field values push to select rotate the knob to increment or decrement the value then push again to enter Volume and Squelch Knobs VOLUME Control adjusts the speaker volume for monitoring SQUELCH Control
4. MIC ACC VOLUME SQUELCH AUDIO OUT HI e oo RF IN OUT DUPLEX OUT Using the Tracking Generator Test Set Options Required Spectrum Analyzer Tracking Generator option 102 Additional Equipment Tee Adapter and Coax Stub Required CAUTION NOTE Measurement Procedure 1 Connect the Tee as shown Do not exceed the connector s rated input or permanent instrument damage may result On the Test Set 2 Press the PRESET key Using the knob and data entry keys 3 Select the SPEC ANL screen 4 From the Controls select Ant 5 Set Center Freq to the center frequency of the Coaxial Filter The 1 4 wave length at the desired frequency for the coax filter can be calculated using the following formula 1 f 11811 10 K 4 Where f Frequency in MHz 118112 Speed of light in inches and K Velocity Factor of coax Set Span to view desired spectrum From Controls select Main Select RF Gen from the Choices field 2 Fe NS From Controls select Track 10 Set Amplitude to 0 dBm 215 Using the Tracking Generator NOTE 216 Amplitude default of 0 dBm is typically sufficient for performing measurements on 1 4 Wave Coaxial Filters The level can be changed as required to suit measurement needs e g increase measurement range minimize incident input from other sources etc If Amplitude is changed Ref Level
5. 509 COXIAL CABLE SPEAKER AUDIO INPUT ANTENNA RF INPUT 140 AM Receivers Additional Equipment Test Load Required Special Test Considerations See Receiver Test Loads on page 46 Measurement Procedure 1 Connect the Receiver as shown On the Test Set 2 Press the PRESET key 3 Press the RX key Using the knob and data entry keys 4 Set RF Gen Freq to the receiver operating frequency Set Amplitude to 47 dBm 1 mV Set AFGen1 To AM at the desired modulation depth typically 30 Set Ext Load R to the test load resistance 9 n1 g E i Set AC Level meter to measure Watts 141 AM Receivers On the Radio set the Receiver s Controls as follows 9 Set power to ON 10 If required set frequency to the same value as step 4 11 Set squelch to minimum 12 Set RF Gain to maximum if equipped 13 Set the volume control until the AC Level reads 100 of the Receiver s specified audio output Refer to the audio output specifications for the receiver being tested On the Test Set using the knob and data entry keys 14 Decrease Amplitude until the SINAD meter reads 10 dB Sensitivity 10dB SINAD is displayed as Amplitude as shown RX TEST Ss AC Level r mE 0 004040 Avg RF Gen Freq AFGen1 Freq AFGen2 Freq Filter 1 To Screen 8 310000 1 0000 BEEN 50Hz HPF n m poHz HPF Sensitivity Amplitude AFGen To
6. 1 RECEIVER UNDER TEST 146 AM Receivers Measurement Procedure 1 Connect the Receiver as shown On the Test Set 2 Press the PRESET key 3 Press the RX key Using the knob and data entry keys 4 Set RF Gen Freq to the receiver operating frequency 5 Set Amplitude to 137 dBm 6 Set AFGenl To AM at desired modulation depth typically 30 On the Radio set the Receiver s Controls as follows 7 Set power to ON 8 Set AFGenl To AM at desired modulation depth typically 30 9 If required set frequency to the same value as step 4 10 Set squelch to minimum 11 Set RF Gain to maximum if equipped 12 Set coded squelch feature if equipped to OFF 13 Set the volume control until noise is at a comfortable level 14 Increase the Receiver s squelch control until audio is just squelched 147 AM Receivers On the Test Set using the knob and data entry keys 15 Slowly increase the Amplitude until squelch just remains open Critical Squelch is displayed as Amplitude as shown e Record this level RX TEST AC Level V 0 7878 RF Gen Freq AFGen1 Freq AFGen2 Freq Filter 1 To Screen Squelch q 2 310000 Sensitivity i AFGeni To AFGen2 To Filter 2 eni Atten Hold On Off Ext Load R Output Port RF Out Dupl 16 Decrease Amplitude until the Receiver s squelch just closes e Record this level Calculate the measurement 17 Critical Squelch
7. aAA Ls 9 B Em F 9 jJ Gu CURSOR CONTROL oen e ios E EE ER MIC ACC VOLUME SQUELCH AUDIO OUT AUDIO IN e oo y 9 Lasd RF IN OUT DUPLEX OUT 500 COXIAL CABLE ANTENNA RF INPUT SPEAKER AUDIO INPUT 101 FM Receivers Additional Equipment Required Test Load Special Test Considerations See Receiver Test Loads on page 46 102 Measurement Procedure 1 Connect the Receiver as shown On the Test Set 2 Press the PRESET key 3 Press the RX key Using the knob and data keys 4 Select the ENCODER screen 5 Set Mode to CDCSS 6 Set Standard to CDCSS 7 Set Code to the Receiver s CDCSS 3 digit octal code 8 Set Send Mode to Cont 9 Set FM Coupling to DC 10 Set AFGen2 To to 500 Hz 11 Select Send 12 verify the Status Flag indicates Sending SIGNALING ENCODER AF GENERATOR 2 Status Send Mode Sending Mode CDCSS TOC Time ps end Standard Dess ms Sending Data Rate E Fg m Ei chy oe No To Screen RF GEN RF ANL AF ANL AFGen2 To NI FM Receivers Once the Sending 13 Press the PREV key to return to the RX TEST screen 14 Set RF Gen Freq to the receiver operating frequency 15 Set Amplitude to
8. Additional Equipment Test Load Required Special Test Considerations See Receiver Test Loads on page 46 Measurement Procedure 1 Connect the Receiver as shown On the Test Set 2 Press the PRESET key 3 Press the RX key Using the knob and data entry keys 4 Set RF Gen Freq to the receiver operating frequency NOTE RF Gen Freq is dependent on the Receiver s mode LSB USB and the audio frequency desired normally 1 kHz When setting for LSB set RF Gen FREQ to a setting 1 kHz less than the normal carrier frequency For USB set to 1 kHz higher Set Amplitude to 47 dBm 1 mV Set AFGen1 To OFF Set Ext Load R to the test load resistance Set AC Level meter to measure Watts Sors m Set SINAD meter to measure AF Freq 175 SSB Receivers 176 On the Radio set the Receiver s Controls as follows 10 Set power to ON 11 Set mode to LSB or USB 12 If required set frequency to the same value as step 4 13 Set squelch to minimum 14 Set RIT to center or disable if equipped 15 Set RF Gain to maximum if equipped On the Test Set using the knob and data entry keys 16 Change the value of RF Gen Freq until the AF Freq meter reads 7 KHz On the Radio set the Receiver s Controls as follows 17 Set the Receiver s volume control until the AC Level meter indicates the Receiver s rated output power Refer to audio output specifications for the Receiver
9. t Co RF IN OUT a O POWER 1 OFF ON M w Connectors EN ECEN CANCEL is a Ea av MIC ACC VOLUME SQUELCH AUDIO OUT AUDIO IN HI e oo DUPLEX OUT ANT IN 38 RF IN OUT Connector type N female connector for output signals from the RF Generator and input signals 60 Watts continuous or 100 Watts for 10 sec min to the RF Analyzer Nominal impedance is 500 DUPLEX OUT Connector female BNC connector for output RF Generator and Tracking Generator signals Nominal impedance is 500 ANT IN Connector female BNC connector for input and analysis of low power RF signals 200 m Watts and for off the air measurements Nominal impedance is 500 MIC ACC Connector 8 pin female DIN connector provides various connections including e Audio microphone input for modulation of the RF output signal e Control of the RF Generator s output state e Switching between the TX TEST and RX TEST screens e Provides keying signal to control a transmitter under test AUDIO OUT Connector female BNC connector to output signals from AF Generators 1 and 2 including encoder functions Nominal output impedance is lt 1Q at 1 kHz AUDIO IN Connectors two female BNC connectors to input audio signals to the AF Analyzer Nominal impedance is 1 MQ or 6000 e Hlisthe signal input for both grounding and floating input configurations LO may be selected to co
10. Measurement Procedure 1 Connectthe Transmitter Under Test as shown CAUTION The RF present at the Test Set RF IN OUT connector must not exceed 60W continuous or 100 Watts for 10 sec minute On the Test Set 2 Press the PRESET key 3 Press the TX key Using the knob and data entry keys 4 Set AFGenl Lvl to the correct output level for the desired frequency devi ation refer to microphone sensitivity and deviation specifications for the Transmitter being tested 5 SetFilter 1 to 300 Hz HPF 6 Set Filter 2 to 3 kHz LPF 7 Set De Emphasis to Off NOTE If the Test Set is equipped with the CCITT filter option set Filter 1 to 20 Hz HPF and Filter 2 to CCITT 57 FM Transmitters 8 Determine if actual frequency readout or frequency error is the desired measurement O For actual frequency readout continue with step 9 O For frequency error Set Tune Mode to Manual Set Tune Freq to the expected carrier frequency On the Radio 9 Key the Transmitter As long as the Transmitter is keyed the measurement results will display Fre TX TEST quenc TX Freq Error Be 0 169 quency TX TEST Frequency TX Frequency FM Deviation 145 280024 3 579 TX Power Output 2 03 1 00004 Mni Power ing Fre Tune Mode Input Port AF Anl In AFGen1 Freq To Screen EM Demod Tune Freq IF Filter Filter 1 AFGen1 Lvl Eee ENS MHz ilter TX Pwr Zero Ext TX Key e Emphasis On Off etector 58
11. Tune Mode Tune Freq ZE MHZ TX Pwr Zero Zero AF Anl In AFGen1 Freq To Screen SSB Demod 1 0000 Filter 1 AFGen1 Lvl Input Port IF Filter 15 kHz ilter eae etector Ext TX Key On Off 169 SSB Transmitters SSB Harmonics and Spurious Output Measurement Description This procedure is used to measure an SSB Transmitter s conducted harmonic and spurious emissions The spectrum analyzer option is used to display harmonic and spurious components from 400 kHz to 1000 MHz 3 Knob Data Entry 2 Keys 777777 INSTRUMENT STATE DATA FUNCTIONS Fy REFSET fever AVG TNR Ea E LoLMIT HILMIT x m a p ESWE MIC ACC VOLUME SQUELCH AUDIO OUT RF IN OUT DUPLEX OUT HI 500 COXIAL CABLE SHEILDED AUDIO CABLE ANTENNA MICROPHONE RF OUTPUT AUDIO INPUT 170 SSB Transmitters Test Set Options Required Spectrum Analyzer Tracking Generator option 102 Cable and adapter mismatch must be considered when measuring harmonics and spurious emissions of a trans mitter If an external attenuator is used special care must Special Test Considerations be taken to ensure the attenuator is not causing any spuri ous or harmonic emission Also if spurious emissions are l
12. 50 Each procedure may contain the following information e A brief measurement overview and a reference to applicable TIA EIA spec ifications for each test e A list of the Test Set options and additional test equipment required to per form the procedure e Any special test considerations that need to be considered for safety mea surement accuracy etc e Step by step procedures required to perform each measurement with illus trations Refer to Configuring for Measurements on page 243 or the Test Set s User Guide on preparing the Test Set for operation List of Tests List of Tests FM Transmitter Measurements FM Off The Air Monitoring Determining Unknown Transmitter Carrier Frequency on page 53 FM Output Power Deviation and Frequency Frequency Error Measurement on page 56 FM Deviation and Symmetry Measurement on page 59 FM Microphone Sensitivity and Modulation Limiting Measure ment on page 62 FM CTCSS Encoder Frequency and Deviation Measurement on page 65 FM CDCSS Coding and Deviation Measurements on page 67 FM DTMF Encodes and Deviation Measurement on page 70 FM Audio Distortion Measurement on page 74 FM Harmonics and Spurious Output Measurement on page 76 FM Receiver Measurements FM Audio Output Power Measurement on page 80 FM SINAD Receiver Center Frequency and Modulation Accep tance Bandwidth Measurement on page 83 FM Variation Of Sensitivity With Signal Frequency Meas
13. TX TEST TX Frequency FM Deviation Deviation 145 279974 4 847 TX Power 2 05 3 4 Distortion 75 FM Transmitters FM Harmonics and Spurious Output Measurement Description This procedure is used to measure an FM Transmitter s conducted harmonic and spurious emissions The spectrum analyzer option is used to display harmonic and spurious components from 400 kHz to 1000 MHz FM reference is ANSI EIA RS 152 C RS 316 B 3 Knob Data Entry 2 Keys 477777 INSTRUMENT STATE s E z3 amp VOLUME SQUELCH AUDIO OUT MIC ACC RF IN OUT 500 COXIAL SHEILDED AUDIO CABLE ANTENNA MICROPHONE RF OUT AUDIO INPUT 76 FM Transmitters Test Set Options Required Spectrum Analyzer Tracking Generator option 102 Cable and adapter mismatch must be considered when measuring harmonics and spurious emissions of a trans mitter If an external attenuator is used special care must Special Test Considerations be taken to ensure the attenuator is not causing any spuri ous or harmonic emission Also if spurious emissions are located verify that the transmitter is the source and not another object radiated emissions near the test site CAUTION Measurement Procedure 1 Connect the Transmitter as shown The
14. 312 Index Numerics 1 4 Wave Coaxial Tuning Swept 214 20 dB Quieting Sensitivity Measure ment 91 A Additional Measurement Information 48 Additional Test Equipment Require ments 44 AGC Measurement 143 AM AGC Measurement 143 Audio Distortion Measurement 128 152 Audio Frequency Response Measure ment 149 Audio Output Power Measurement 137 Determining Unknown AM Trans mitter Carrier Frequency 119 Envelope Display Measurement 133 Frequency Frequency Error Measure ment 122 Harmonic Measurement 130 Modulation Depth Measurement 122 Off The Air Monitoring 119 Output Power Measurement 122 Spurious Output Measurement 130 Spurious Response Attenuation Mea surement 155 Squelch Sensitivity Measurement 146 AM Radio Testing 115 AM Receiver Testing 136 AM Transmitter Testing 118 Analyzing External Transmitter Inter modulation Distortion 200 Antenna Return Loss VSWR Mea surement and Tuning 210 Audio Distortion Measurement 74 108 128 152 Audio Frequency Response Measure ment 105 149 Audio Output Power Measurement 80 137 174 Cc Cable Fault Location 218 Cabling Restrictions 244 Carrier Suppression Measurement 166 CDCSS Coding Measurement 67 CDCSS Sensitivity Measurement 101 Coaxial Tuning Swept 214 Configuration Menu 246 Configuring the HP 8920A for Mea surement 245 Considerations Measurement 50 116 160 188 234 Critical Squelch Sensitivity Mea
15. CEC HUEF Controls PHOT THT Maar 3 E Ms FF In nut 226 Calculate the Return Loss in VSWR Using the Tracking Generator 34 Use the following chart to convert loss into VSWR Return Loss VSWR 46 0 dB 1 0 26 4 dB 1 1 20 7 dB 1 2 17 7 dB 1 3 15 5 dB 1 4 14 0 dB 1 5 11 7 dB 1 7 9 5 dB 2 0 6 0 dB 3 0 If Pass Cavity coupling loops were changed e Repeat steps 1 through 20 to measure insertion loss perform at 1 or 2 dB Div e Repeat steps 21 through 33 to measure return loss 227 Using the Tracking Generator Repeater System Effective Sensitivity Measurement 228 Description This procedure is used to measure the effective sensitivity of a repeater system using the Spectrum Analyzer Tracking Generator option Once effective sensitivity measured receiver sensitivity degradation is calculated Knob 3 Data Entry 2 Keys SCREEN ONTROL 7 INSTRUMENT STATE ET s fe aaa RFIN OUT DATA FUNCTIONS NCR _ al d Loi Hi LMT MHz 1 2 3 E kHz 0 mV mem Fe Y eae Bx MIC ACC VOLUME SQUELCH AUDIO OUT AUDIO IN sek 9 oo 9 e AX ssrowsse maw J AN as TEST LOAD 1 REPEATER SPEAKER AUDIO Transmitter Receiver INPUT ANTENNA GND RF OUTPUT DE ANTENNA Tr
16. DC Current Meter Option 103 Measurement Range 0 to 10 A usable to 20 A Accuracy The greater of 10 of reading after zeroing or 30 mA levels gt 100 mA 277 Remote Programming Option 103 Remote Programming Option 103 HP IB Hewlett Packard s implementation of IEEE Standard 488 2 Functions Implemented SH1 AH1 T6 L4 SR1 RL1 LEO TEO PPO DC1 DTI C4 C11 E2 RS 232 Six wire RJ 11 connector provides two three wire serial ports for serial data in and out no hardware handshake capability Baud Rates 150 300 600 1200 2400 4800 9600 and 19200 Hz Parallel Centronics connector A standard 25 pin sub min D female connector with right angle adapter is included NOTE Retrofittable only for HP 8920A units with serial number prefix of 3501 and greater 278 Reference Oscillator Specifications Reference Oscillator Specifications TCXO Standard Temperature ppm 0 to 55 C Aging lt 2 ppm year Warm up Time lt 30 seconds to be within 2 ppm of final frequency OCXO Option 001 Temperature 0 05 ppm 0 to 55 C Aging lt 0 5 ppm year 1 ppm in first year Warm up Time 15 minutes to be within 0 1 ppm of final frequency Rear Panel BNC connectors Input Frequency 1 2 5 10 MHz Input Level gt 0 15 Vrms Output Frequency 10 MHz Output Level gt 0 5 Vrms 1 Electrostatic Discharges to the 10 MHz Ref Input port of 0 5 kV or above may cause degra dation of
17. Measurement Procedure 1 Connect the Receiver as shown On the Test Set 2 3 Press the PRESET key Press the RX key Using the knob and data entry keys 4 5 6 Set RF Gen Freq to the receiver operating frequency Set Amplitude to 47 dBm 1 mV Set AFGen1 To 60 of the Receiver s specified maximum frequency de viation typically 3 kHz Set AFGen2 Freq to the Receiver s CTCSS tone frequency Set AFGen2 To to the 500 Hz Set Ext Load R to the test load resistance 10 Set AC Level meter to measure Watts 98 FM Receivers On the Radio set the Receiver s Controls as follows 11 Set power to ON 12 If required set frequency to the same value as step 4 13 If required set CTCSS tone frequency to the same value as step 4 14 Set RF Gain to maximum if equipped 15 Set squelch control to minimum if equipped 16 Set the volume control until the AC Level reads 100 of the Receiver s specified audio output Refer to the audio output specifications for the receiver being tested 17 Verify Receiver s squelch is closed On the Test Set using the knob and data entry keys 18 Set Amplitude to 37 dBm 19 Slowly increase the Amplitude until the squelch remains open and the SI NAD indicator shows 10 dB minimum CTCSS Sensitivity is displayed as Amplitude as shown e Record this level RX TEST SD AC Level s TS 0 6321 Avg CTCSS i RF Gen Freq AFGen1 Freq AFGe
18. adjusts the squelch threshold for AM FM or SSB signals 34 The Test Set s Features Screen Control Keys SCREEN CONTROL INSTRUMENT STATE MSSG HELP CONFIG HOLD E ADRS SAVE IU SERDy fpa FUNCTIONS DATA D These keys are used to access several instrument control and information screens RX key displays the RX TEST screen for test of receivers TX key displays the TX TEST screen for test of transmitters DUPLEX key displays the DUPLEX TEST screen for simultaneous test of transmitters receivers PREV key returns the display to the previous screen TESTS key displays the TESTS MAIN screen used to access automated test program functions MSSG key displays any error or operation messages since power up HELP key displays the HELP screen that provides operating assistance CONFIG key displays the CONFIGURE screen defining general operating functions HOLD key stops all measurements Selecting again resumes measurement PRINT key prints the entire contents of the displayed screen the time and date and any previously defined print title if a printer is connected 35 The Test Set s Features Instrument State Keys 36 SCREEN CONTROL INSTRUMENT STATE MSSG HELP CONFIG HOLD PRINT ADRS SAVE QUSERD DATA FUNCTIONS 7 DATA gt Nl LOCAL key returns the instrument to manual control after HP IB cont
19. 142 00000 Lul 22 55 Ref Screen GEH AHL AHL SCOPE feces 2 Gee ka SPEC AHL ENCOBEF CECOKER 217 Using the Tracking Generator Cable Fault Locations This procedure is used to locate breaks in coaxial cables using the Spectrum Analyzer Tracking Generator option and System Support Software Test Card HP 11807A option 100 Suspected faults are displayed as data indicating the fault length or plotted on the screen Knob 3 Data Entry 2 Keys SCREEN CONTROL d INSTRUMENT STATE SAVE SS DATA NEN 7 8 9 b PUSH TO SELECT enl Ee ivo E e aia MIC ACC VOLUME SQUELCH AUDIO OUT AUDIO IN T6 UO e oo 9 9 SE 3 VANCES Aan Aan 218 Using the Tracking Generator Test Set Options Required Spectrum Analyzer Tracking Generator option 102 Additional Equipment Required HP 11807A Option 100 a Power Splitter Combiner HP 11636A and a 50Q Load Special Test Considerations Cable fault must be within 1000 feet of the Test Set Measurement Procedure On the Test Set 1 Insert the System Support Test Card HP 11807A Option 100 into the Memory Card Slot Press the PRESET key Press the TESTS key Using the knob and data entry keys
20. Higher number of readings averaged will require longer to reach the final indication 181 SSB Receivers SSB Squelch Sensitivity Measurement Description This procedure is used to measure an SSB Receiver s critical squelch and maximum squelch sensitivity For critical squelch the receiver is just squelched with minimum modulated input at the Receiver s antenna then the input is increased until the squelch is opened Maximum squelch is the amount of modulated signal required to open the squelch when the control is set to maximum Minimum and maximum squelch hysteresis is also measured and calculated The SSB reference is IEC 489 5 paragraph 11 3 Knob Data Entry 2 Keys SCREEN CONTROL 7 INSTRUMENT STATE GD msio HELP CONFG HOLD PRINT DATA HUNCTIONS DATA E R AVG S en xij CURSOR CONTROL ee XU e pore ORT D o MIC ACC VOLUME SQUELCH AUDIO OUT RF IN OUT DUPLEX OUT 509 COXIAL CABLE SPEAKER AUDIO INPUT ANTENNA RF INPUT 182 SSB Receivers Additional Equipment Test Load Required Special Test Considerations See Receiver Test Loads on page 46 Measurement Procedure 1 Connect the Receiver as shown On the Test Set 2 Press
21. Input Level Range for Specified Accuracy Standard 18 to 50 dBm at RF IN OUT 0 016 mW to 100 W 50 to 14 dBm at ANT IN Option 007 32 to 36 dBm at RF IN OUT 0 63 uW to 4 0 W Residual FM and Noise 0 3 to 3 kHz rms lt 7Hz Resolution f 10 kHz 1 Hz f210 kHz 10 Hz AM Measurement SSB Measurement RF Analyzer Specifications Frequency Range 10 MHz to 1 GHz usable to 400 kHz Depth 0 to 9596 Accuracy 5 of reading 1 5 AM 50 Hz to 10 kHz rates modulation lt 80 THD Noise lt 2 rms for modulation lt 80 AM 1 kHz rate in a 0 3 to 3 kHz BW Input Level for Specified Accuracy levels in PEP Standard 18 to 50 dBm at RF IN OUT 0 016 mW to 100 W 50 to 14 dBm at ANT IN Option 007 32 to 36 dBm at RF IN OUT 0 63 uW to 4 0 W Residual AM lt 0 2 in a 0 3 to 3 kHz BW Resolution 0 1 Frequency Range 400 kHz to 1 GHz Bandwidth 3 dB 20 Hz to 70 kHz Distortion and Noise 346 at 1 kHz rate in a 0 3 to 3 kHz BW 295 RF Analyzer Specifications TDMA Analyzer HP 8920B Option 500 includes HP 83201B Frequency Range 824 MHz to 894 MHz Input Level Range RF In Out 1mW to 60W 0 to 47 8 dBm Antenna In 36 to 17 dBm Input Frequency Setting Error 1kHz RX DSP Level Setting Range 23 to OdB full scale Residual Error Vector Magnitude lt 1 3 Error Vector Magnitude Measurement Accuracy 4 plus 2 of read ing Residual Phase Error lt 1 0 Residual Mag
22. Key the Transmitter As long as the Transmitter is keyed the measurement results will display Bree TX TEST Fre quenc TX Freq Error 0 169 gener TX TEST Frequency TX Frequency AM Depth 28 310075 83 3 TX Power Output 18 9 0 99951 Modulating Power Frequency Tune Mode Input Port AF Anl In AFGen1 Freq To Screen AM Demos M 1 0000 N Hz Tune Freq IF Filter Filter 1 AFGen1 Lvl EA ERE Booh HER EXON MHz ilter mv TX Pwr Zero Ext TX Key pum On Off d etector 124 AM Transmitters AM Microphone Sensitivity and Modulation Limiting Measurement Description This procedure is used to measure an AM Transmitter s audio input sensitivity and modulation limiting capability if available Modulation limiting is verified over the Transmitter s audio frequency range 3 Knob Data Entry 2 Keys SCREEN CONTROL INSTRUMENT STATE E dowriG HOLD PRINT ADRS SAVE bata FUNCTIONS 7 DATA nire dung aye INCR 1 Low ser 8 9 aa mm mm T a o 5 L6 En 2 L3 By m NO a ms ppm m wo Lome av MIC ACC VOLUME SQUELCH AUDIO OUT AUDIO IN RF IN OUT DUPLEX OUT ANTIN eines E i dom SHEILDED ADUIO CABLE ANTENNA MICROPHONE R
23. SION dB AC Level 0 25 16 24 3 88 Output Ref To Screen RF Gen Freq 8 310000 _ MHz AFGen1 Freq 1 0000 Hz AFGen1 To AFGen2 Freq 1 0000 Hz AFGen2 To FM Filter 1 50Hz HPF Filter 2 15kHz HPF Amplitude ojii Atten Hold On Off Ext Load R EXT Output Port F Out Dupl I 145 AM Receivers AM Squelch Sensitivity Measurement Description This procedure is used to measure an AM Receiver s critical squelch and maximum squelch sensitivity For critical squelch the receiver is just squelched with minimum modulated input at the Receiver s antenna then the input is increased until the squelch is opened Maximum squelch is the amount of modulated signal required to open the squelch when the control is set to maximum Minimum and maximum squelch hysteresis is also measured and calculated 3 Knob Data Entry 2 a SCREEN CpNTROL LP CONG HOLD PRINT msio HEI INSTRUMENT STATE apes SAVE INCTIONS pata 7 18 19 4j1 5 6 1 2 13 v pusu ToseLect oji LY D ves No a mm e o D MIC ACC VOLUME SQUELCH AUDIO OUT AUDIO IN 6 e 090 NESSUN A an RF IN OUT DUPLEX OUT
24. SQUELC e 99 Pu caes RFIN OUT DUPLEX QU HI HP Part No 08920 90126 Printed in U S A April 1996 Rev C Notice Copyright Hewlett Packard Company 1994 Information contained in this document is subject to change without no tice All Rights Reserved Reproduction adaptation or translation without prior written permission is prohibited except as allowed under the copy right laws This material may be reproduced by or for the U S Government pursu ant to the Copyright License under the clause at DFARS 52 227 7013 APR 1988 Hewlett Packard Company Learning Products Department 24001 E Mission Liberty Lake WA 99019 9599 U S A Manufacturer s Declaration Herstellerbeschei nigung This statement is provided to comply with the requirements of the German Sound Emission Directive from 18 January 1991 This product has a sound pressure emission at the operator position lt 70 dB A Sound Pressure Lp lt 70 dB A e At Operator Position e Normal Operation e According to ISO 7779 1988 EN 27779 1991 Type Test Diese Information steht im Zusammenhang mit den Anforderungen der Maschinenl rminformationsverordnung vom 18 Januar 1991 e Schalldruckpegel Lp lt 70 dB A e Am Arbeitsplatz e Normaler Betrieb e Nach ISO 7779 1988 EN 27779 1991 Typpr fung Safety Considerations WARNING EN ER GENERAL This product and related documentation must
25. Set Span to view desired frequency range Set Ref Level to 0 dB or greater From Controls select Main Select RF Gen from the Choices field du NL 10 From Controls select Track Amplitude default of 10 dBm is typically sufficient for performing measurements on passive cavities however higher levels may be needed to measure the cavity notch depth The level can be changed to suit measurement needs e g increase measurement range minimize incident input from other sources etc If Amplitude is changed Ref Level will also have to be changed 11 From the Controls select RF Gen 12 Select Auxiliary from the Choices field 13 From Normalize select A Only 14 From Normalize select Save B 15 From Normalize select A B 16 From Controls select Auxiliary 223 Using the Tracking Generator NOTE 224 17 Select Main from the Choices field Pass Cavity 18 Connect the pass cavity as shown MIC ACC VOLUME SQUELCH AUDIO OUT Pass Cav ity 19 Adjust the tuning rod to the desired pass frequency 20 Adjust the coupling loops for desired band pass insertion loss If Sensitivity dB div is changed from 10 dB div the coaxial cables must be shorten and the previous steps performed on the Auxiliary screen must be repeated to re normalize the display for the new setting INSERTION LOSS ANALYZER BW 30 kHz Controls eR Frea cra Level Sia ecu FADING IH PENE
26. This procedure is used to measure an FM Receiver s audio distortion Distortion is measured at full rated audio output and 17 dB below full rated audio output Measurement is read directly from the HP 8920A screen The FM reference is ANSI EIA TIA 204D 3 Knob Data Entry 2 Keys C7 SCREEN CONTROL INSTRUMENT STATE y msie HELP coNEG HOLD PRINT ADRS SAVE D DATA HUNCTIONS EFSET METER c CURSOR CONTROL By s E ome o 9 E E MIC ACC VOLUME SQUELCH AUDIO OUT RF IN OUT DUPLEX OUT 500 COXIAL CABLE SPEAKER AUDIO INPUT ANTENNA RF INPUT lt 108 FM Receivers Additional Equipment Test Load Required See Receiver Test Loads on page 46 Special Test Considerations Sce Caded Squelch on page 47 Measurement Procedure 1 Connectthe Receiver as shown On the Test Set 2 Press the PRESET key 3 Press the RX Key Using the knob and data entry keys 4 Set RF Gen Freq to the receiver operating frequency 5 Set Amplitude to 47 dBm 1 mV 6 Set AFGenl To 60 of the Receiver s specified maximum frequency de viation typically 3 kHz 7 Set Ext Load R to the test load resistance 8 Set AC Level meter to measure Watts On the Radio set the
27. lt 1 uV in a resonant dipole antenna 309 General Specifications 310 Glossary TERMS Access Accessing a screen or field means to display or go to it Access Accessing a screen or field means to display or go to it Select To choose a selection within a field or screen Set Choose a specific parameter or value within a field ACRONYMS AMPS TACS Advanced Mobile Phone Service Total Access Communication System CDCSS Continuous Digital Coded Squelch System CTCSS Continuous Tone Coded Squelch System DTMF Dual Tone Multi Frequency EIA Electronic Industries Association NMT Nordic Mobile Telephone SINAD Signal plus noise plus distortion to noise plus distortion ratio TIA Telecommunications Industry Association ABBREVIATIONS Greater Than Less Than ADC Amperes Direct Current AF Audio Frequency AFGen Audio Frequency Generator AGC Automatic Gain Control AM Amplitude Modulation ANSI American National Standards Institute BW Bandwidth CCW Counter Clockwise CW Clockwise FM Frequency Modulation HPF High Pass Filter IF Intermediate Frequency LPF Low Pass Filter LSB Lower side band 311 Glossary NPC No Primary Code OSC Oscilloscope RF Radio Frequency RFGen Radio Frequency Generator RIT Receiver Incremental Tuning RX Receiver SSB Single Side Band TX Transmitter USB Upper side band VAC Volts Alternating Current VDC Volts Direct Current
28. o O O o o O Oo o OOOOOOO RFIN OOOOOOOOOOO0O0O O BAAN 1143 c9o96969o a Oo Oo O 220 VIDEO EXT SCO T P 10MHzREF 10MHz REF AUDIO IF UTPUT TRIGGER OUTPUT INPUT MONITOR DC CURRENT MEASUREMENT Connection Configuration for DC Power 1 Verify that the front panel power switch is off 2 Setthe rear panel AC DC switch to the DC position out 3 Connect the user supplied power cable HP P N 08920 61078 to the rear panel DC power connector A DC connector is provided in the accessory kit optional Connect the other end to facility DC power 11 32 Vdc 15A 244 Preparing the Test Set for DC Operation CABLING When cabling the DC connector remember that varying wire gauge RESTRICTIONS type and length will yield different resistive losses Proper operation of the Test Set requires that a minimum of 11 Vdc at 12 Adc be present at the DC input connector A typical DC connection should consist of a cable made from 16 gauge stranded wire 20 feet in length maximum with a power source of 13 8 Vdc 15A 4 Turn the POWER ON in After approximately 15 seconds verify that the CRT screen displays All self tests passed and that the RX TEST screen is displayed If correct the instrument is ready for operation NOTE If DC power up appears incorrect turn OFF the POWER switch Verify that DC fuse is not blown Replace if required Replacing a fuse with a different
29. optional 37 pin D style connector for parallel and serial communications and audio transmitter control lines between the Test Set and external radio equipment DC INPUT Connector 2 pin female connector to input 11 28 Vdc 120W maximum for DC operation AC INPUT Connector 3 pin male connector to input 100 to 240 Vac for AC operation Key and Fuse Holders AC DC selects the instrument s power source DC FUSE Holder 15A 250V fuse for DC operation AC FUSE Holder 5A 250V fuse for AC operation 41 The Test Set s Features 42 Measurements Considerations The following guidelines must be adhered to when performing any of the FM AM SSB Transmitter and Receiver Spectrum Analyzer or Oscilloscope Measurements 43 Measurement Guideline 1 Measurement Guideline 1 Connector Considerations CAUTION 44 The RF present at any Test Set input connector must not exceed the specified level or permanent instrument damage may result If necessary use an external attenuator If overpower occurs disconnect the Transmitter then cycle Test Set power OFF ON to reset the protection circuitry RF IN OUT The RF present at the Test Set RF IN OUT connector must not exceed 60W continuous or 100 Watts for 10 sec minute or permanent instrument damage may result ANT IN The RF present at the Test Set ANT IN connector must not exceed 200 mW or permanent instrument damage may result Measuremen
30. passive cavities using the Spectrum Analyzer Tracking Generator option The cavities are tuned to the desired pass frequency and band pass insertion loss Once properly tuned insertion loss and return loss are measured Return loss can be converted into VSWR Knob Data Entry 2 Keys SCREHN CONTROL E INSTRUMENT STATE vss up OLD PRINT ADRS save DATA FUNCTIONS cuum pATA uu mEPSET METER AVG i _ GHz CURSOR CONTROL E Y 1 2 3 E8 0 PUSH TO SELECT Sime ICANCEL mn ss ES E D A MIC ACC VOLUME SQUELCH AUDIO OUT AUDIO IN Ue Q FC o9 8 8 6 en AX arowan aw LA RF IN OUT Test Set Options Required Spectrum Analyzer Tracking Generator option 102 Additional Equipment Return Loss Bridge and a 50Q Load Required Special Test Considerations See Coaxial Cable on page 46 222 CAUTION NOTE Using the Tracking Generator Measurement Procedure 1 Connect the Adapter as shown Do not exceed the connector s rated input or permanent instrument damage may result On the Test Set 2 Press the PRESET key Using the knob and data entry keys Select the SPEC ANL screen From the Controls select Ant Set Center Freq to the pass frequency of the cavity under test
31. 25 C 10 C Accuracy 10 of reading for operating temperature range SWR 1 5 1 Resolution Power 10 W 1 mW Power 210 W 10 mW Option 007 Frequency Range 400 kHz to 1 GHz Measurement Range 40 uW to 2 4 W continuous 4 0 W for 10 seconds minute Accuracy 5 of reading 400 nW for temp 25 C 10 C SWR lt 1 5 1 Resolution P lt 400 mW 40 uW P 2 400 mW 400 uW 1 To achieve the specified accuracy when measuring power at the RF IN OUT port the internal signal generator level must be 60 dB below the measured power or less than 20 dBm at the DUPLEX port 292 RF Analyzer Specifications RF Frequency Measurement Measurement Range 400 kHz to 1 GHz Level Range RF IN OUT Standard 1 mW to 60 W continuous 100 W for 10 seconds minute Option 007 40 vuo 2 4 W continuous 4 0 W for 10 seconds minute ANT IN 36 dBm to 20 dBm Accuracy 1 Hz plus timebase accuracy Frequency Resolution 1 Hz 293 RF Analyzer Specifications FM Measurement 294 Frequency Range 5 MHz to GHz usable to 400 kHz Deviation 20 Hz to 75 kHz Sensitivity 2 uV 15 kHz IF BW High Sensitivity Mode 0 3 to 3 kHz BW typical 1 uV 12 dB SINAD f 210 MHz Accuracy 4 of reading plus residual FM and noise contribution 20 Hz to 25 kHz rates deviation lt 25 kHz Bandwidth 2 Hz to 70 kHz 3 dB DCFM measurements also available THD Noise lt 1 for 25 kHz deviation and 1 kHz rate in a 0 3 to 3 kHz BW
32. 47 dBm 1 mV 16 Set AFGen1 To 60 of the Receiver s specified maximum frequency de viation typically 3 kHz 17 Set Ext Load R to the test load resistance 18 Set AC Level meter to measure Watts On the Radio set the Receiver s Controls as follows 19 Set power to ON 20 If required set frequency to the same value as step 4j 21 Set RF Gain to maximum if equipped 22 Set squelch control to minimum if equipped 23 Set the volume control until the AC Level reads 100 of the Receiver s specified audio output Refer to the audio output specifications for the receiver being tested 103 FM Receivers 104 On the Test Set using the knob and data entry keys 24 Verify Receiver s squelch is closed 25 Set Amplitude to 137 dBm 26 Slowly increase the Amplitude until the squelch remains open and the SI NAD indicator shows 10 dB minimum CDCSS Sensitivity is displayed as Amplitude as shown RX TEST Ss AC Level jm E 0 10 18 24 2 341 CDCSS Avg Squelch Sensi tivity RF Gen Freq AFGen1 Freq AFGen2 Filter 1 To Screen Send OH HPF MHz Hz Sites Amplitude AFGen1 To AFGen2 To Filter 2 u Atten Hold z z On Off Bitan FM Receivers FM Audio Frequency Response Measurement Description This procedure is used to measure an FM Receiver s audio frequency response A reference is established at 50 of the Receiver s rated audio output then the output is measured
33. Gain to maximum if equipped 13 Slowly increase volume control until the AC Level reaches the Receiver s rated output power or reaches a maximum level stops increasing Refer to audio output specifications for the Receiver being tested as required NOTE If the rated output cannot be obtained troubleshoot and repair the Receiver s audio stages is necessary Measurement results are displayed on the Test Set as shown RX TEST Sa AC Level 2 036 Audio AF Output Power 0 23 99 RF Gen Freq AFGen1 Freq AFGen2 Freq Filter 1 To Screen 8 310000 1 0000 1 0000 50Hz HPF MHz KkHz kHz Amplitude AFGen1 To AFGen2 To Filter 2 EEUU aT FM 15kHz HPF m ff Atten Hold Ext Load R Output Port IRF Out Dupl 139 AM Receivers AM Sensitivity Measurement Description This procedure is used to measure an AM Receiver s receiver sensitivity Sensitivity is displayed in various measurement units on the Test Set screen 3 Knob Data Entry 2 Keys C SCREEN CONTROL a INSTRUMENT STATE Y PRINT msie HELP cqNFIG HOLD ADRS save USER JUNCTIONS J v ra f ry CONTROL s x0 m cance em ovo E ES EE MIC ACC VOLUME SQUELCH AUDIO OUT AUDIO IN HI RF IN OUT DUPLEX OUT
34. MICROPHONE RF OUT AUDIO INPUT 62 FM Transmitters Special Test Considerations See Incidental Audio on page 46 Measurement Procedure 1 Connect the Transmitter as shown CAUTION The RF present at the Test Set RF IN OUT connector must not exceed 60W continuous or 100 Watts for 10 sec minute On the Test Set 2 Press the PRESET key 3 Press the TX key Using the knob and data keys 4 Set Filter 1 to 300 Hz HPF 5 Set Filter 2 to 3 kHz LPF On the Radio 6 Key the Transmitter and keep keyed until the remaining steps are complet ed On the Test Set using the knob and data entry keys 7 Set AFGenl1 Lvl so that displayed FM deviation is 60 of the Transmit ter s specified frequency deviation typically 3 KHz On the Test Set Microphone Sensitivity is shown as AFGenl Lvl 63 FM Transmitters TX TEST TX Frequency FM Deviation 145 280024 2 965 TX Power JAF Freq 2 03 1 00004 Tune Mode Input Port AF Anl In AFGen1 Freq To Screen SV A E Z Tune Freq IF Filter Filter 1 EE er OOH BEE MHz ilter TX Pwr Zero Ext TX Key TN etector Pk Max Microphone Sensitivity 8 Set AFGen1 Lvl measurement units to dBm 9 Increase AFGen1 Lvl by 20 dB Displayed FM deviation should not exceed the Transmitter s maximum specified deviation 10 Change AFGen1 Freq from 300 Hz to 3 kHz in 100 Hz increments 11 Verify that the displayed FM deviation does not exceed the Transmit
35. RF IN OUT Standard 1 mW to 60 W continuous 100 W for 10 seconds minute Option 007 40 uW to 2 4 W continuous 4 0 W for 10 seconds minute Option 008 0 1 mW to 6 W continuous 10 W for 10 seconds minute ANT IN 36 dBm to 20 dBm Accuracy 1 Hz plus timebase accuracy Frequency Resolution 1 Hz 263 RF Analyzer Specifications FM Measurement Frequency Range 5 MHz to GHz usable to 400 kHz Deviation 20 Hz to 75 kHz Sensitivity 2UV 15 kHz IF BW High Sensitivity Mode 0 3 to 3 kHz BW typical lt I WV 12 dB SINAD f 210 MHz Accuracy 4 of reading plus residual FM and noise contribution 20 Hz to 25 kHz rates deviation X25 kHz Bandwidth 2 Hz to 70 kHz 3 dB DCFM measurements also available THD Noise lt 1 for 25 kHz deviation and 1 kHz rate in a 0 3 to 3 kHz BW Input Level Range for Specified Accuracy Standard 18 to 50 dBm at RF IN OUT 0 016 mW to 100 W 50 to 14 dBm at ANT IN Option 007 32 to 36 dBm at RF IN OUT 0 631W to 4 0 W Option 008 28 to 40 dBm at RF IN OUT 1 6uW to 10 W Residual FM and Noise 0 3 to 3 kHz rms lt 20 Hz lt 7 Hz HP 8920A Option 050 or HP 8920D Resolution f 10 kHz 1 Hz f 210 kHz 10 Hz 264 RF Analyzer Specifications AM Measurement Frequency Range 10 MHz to 1 GHz usable to 400 kHz Depth 0 to 9596 Accuracy 5 of reading 1 5 AM 50 Hz to 10 kHz rates modulation lt 80 THD Noise lt 2 rms for modulation lt 80
36. Screen RF In Ant SSB Demod 1 0000 Hz Tune Freq IF Filter Filter 1 AFGen1 Lvl TATE PEE ENIM za MHz ilter 2 m TX Pwr Zero Ext TX Key e Emphasis etector On the Radio 7 Un key the Transmitter AM Transmitters On the Test Set using the knob and data entry keys 8 Set Tune Mode to Manual 9 Set Tune Freq to a frequency 20 kHz higher than presently indicated e g if current Tune Freq is 120 540000 MHz change to 120 560000 MHz 10 Set AF Anl In to SSB Demod 11 Set IF Filter to 230 kHz 12 Set Filter 1 to lt 20 Hz HPF 13 Set Filter 2 to gt 99 kHz LP 14 Set De Emphasis to Off 15 Select SCOPE On the Radio 16 Key the Transmitter and keep it keyed until the remaining steps are completed On the Test Set using the knob and data entry keys 17 Set Vert div to optimize the displayed waveform typically 200 mV 18 Select Main from the Controls field 19 Select Trigger from the Choices field 20 Set Level div until the displayed waveform is stable typically 1 9 135 AM Receivers AM Receivers The following measurements are provided for testing AM Receivers The procedures are arranged in the order that tests are typically per formed 136 AM Receivers AM Audio Output Power Measurement Description This procedure is used to measure an AM Receiver s maximum audio output power or rated output power into a Test Load Output power is displayed in various measure
37. Test Set Press the PRESET key Press the RX key Using the knob and data entry keys Set RF Gen Freq to receiver operating frequency Set AFGenl to OFF Set Amplitude to OFF Set Ext Load R to the test load resistance Set AC Level meter to measure Watts FM Receivers On the Radio set the Receiver s Controls as follows 9 Set power to ON 10 If required set frequency to same value as step 4 11 Set squelch to minimum 12 Set RF Gain to maximum if equipped 13 Set coded squelch feature if equipped to OFF Refer to Coded Squelch on page 47 for information on opening Receivers with coded squelch 14 Setthe volume control until the AC Level reads 25 of the Receiver s rated audio output power Refer to the audio output specifications for the receiver being tested On the Test Set using the knob and data entry keys 15 Select AC Level 16 Press the REF SET key 17 Increase Amplitude until the AC Level meter reads 20 00 dB On the Test Set 20 dB Quieting Sensitivity is displayed as Amplitude as shown RX TEST SIS EN AC Level o TE 20 34 Avg Ref 20 dB Qui S RF Gen Freq AFGen1 Freq AFGen2 Freq Filter 1 To Screen s 145 280000 1 0000 1 0000 50Hz HPF eting Sensi BEEN tivity Amplitude AFGen1 To AFGen2 To Filter 2 FM FM 15kHz HPF u Atten Hold On Off NN Ext Load R Output Port Ex RF Out Dupl 93 FM Receivers FM Critical and Maximum Squelch Sensitivity Measurement
38. Transmitters 162 SSB Receivers 173 15 Contents 6 Spectrum Analyzer Measurements Introduction 188 List of Measurements 189 Using the Spectrum Analyzer 190 Using the Tracking Generator 205 16 Contents 7 Oscilloscope Measurements Introduction 234 Using the Oscilloscope 235 17 Contents 8 Configuring for Measurements Preparing the Test Set for DC Operation 244 18 Contents 9 References Manuals 250 Application Note 251 Specifications and Standards 252 19 Contents 20 10 HP 8920A Specifications Signal Generator Specifications 255 Audio Source Specifications 261 RF Analyzer Specifications 262 AF Analyzer Specifications 268 Oscilloscope Specifications 271 Spectrum Analyzer Specifications Option 102 272 Signaling Option 004 276 DC Current Meter Option 103 277 Remote Programming Option 103 278 Reference Oscillator Specifications 279 Save Recall Registers 280 General Specifications 281 Contents 11 HP 8920B Specifications Signal Generator Specifications 285 Audio Source Specifications 291 RF Analyzer Specifications 292 AF Analyzer Specifications 297 Oscilloscope Specifications 300 Spectrum Analyzer Specifications Option 102 301 Signaling Option 004 304 DC Current Meter 305 Remote Programming 306 Memory Card Specifications 307 Reference Oscillator Specifications 308 General Specifications 309 21 Contents 22 Getting Started With Th
39. and Signal Generator as shown On the Test Set 2 Press the PRESET key 3 Press the RX key Using the knob and data entry keys 4 Set RF Gen Freq to the receiver operating frequency 5 Set Amplitude to 47 dBm 1 mV 6 Set AFGen1 To AM at desired modulation depth typically 30 7 Set Ext Load R to the specified audio output impedance typically 8 ohms 8 Set AC Level meter to measure Watts On the Radio set the Receiver s Controls as follows 9 Set power to ON 10 If required set frequency to the same value as step 4 11 Set RF Gain to maximum if equipped 12 Set squelch control to minimum if equipped 13 Set the volume control until the AC Level reads 100 of the Receiver s specified audio output Refer to the audio output specifications for the receiver being tested AM Receivers On the Test Set using the knob and data entry keys 14 Decrease Amplitude until the SINAD meter reads 10 dB CJ If desired use the meter averaging function for the SINAD indicator a Select dB on the SINAD meter b Press the AVG key CJ If desired select the number of readings to average Enter the number of readings to average Higher number of readings averaged will require longer to reach the final indication RX TEST Sar AC Level t tt a 0 4106 Avg RF Gen Freg AFGent Freq AFGen2 Freq Filter 1 To Screen 145 280000 1 0000 400 0 A MHZ Hz Hide B Amplitude AFGen1 To
40. and measure an AM signal s output carrier frequency The low level signal is input to the front panel ANT IN connector located then demodulated using the spectrum analyzer function For Performing an AM Off the Air Monitoring on a Known Transmitter Carrier Frequency page 121 If attempting to determine the unknown frequency of a Transmitter connected to the RF IN OUT connector see Output Power Deviation and Frequency or Frequency Error Measurement provided later in this chapter for the measurement procedure Knob Data Entry 2 Keys SCREEW CONTROL INSTRUMENT STATE MIC ACC VOLUME SQUELCH AUDIO OUT HI e oo G9 RF IN OUT 119 AM Transmitters Test Set Options Required Spectrum Analyzer Tracking Generator option 102 Additional Equipment Whip antenna Required Measurement Procedure 1 Connect the Antenna to the ANT IN connector CAUTION Do not exceed the connector s rated input or permanent instrument damage may result On the Test Set 2 Press the PRESET key Using the knob and data entry keys Set AF Anl In to AM Demod Select the SPEC ANL screen From the Controls select Ant Set Center Freq and Span fields to view desired spectrum Set Ref Level from 30 dBm to 50 dBm as requi
41. be reviewed for familiar ization with safety markings and instructions before operation This product is a Safety Class I instrument provided with a protective earth terminal SAFETY EARTH GROUND A unterruptible safety earth ground must be provided from the main power source to the product input wiring terminals power cord or sup plied power cord set CHASSIS GROUND TERMINAL To prevent a potential shock hazard always connect the rear panel chas sis ground terminal to earth ground when operating this instrument from dc power source SAFETY SYMBOLS Indicates instrument damage can occur if indicated operating limits are exceeded Indicates hazardous voltages Indicates earth ground terminal A WARNING note denotes a hazard It calls attention to a procedure practice or the like which if not correctly performed or adhered to could result in personal injury Do not proceed beyond a WARNING sign until the indicated conditions are fully understood and met CAUTION A CAUTION note denotes a hazard It calls attentionto an operation procedure practice or the like which if not correctly performed or adhered to could result in damage to or destruction of part or all of the product Do not proceed beyond an CAUTION note until the indicated conditions are fully understood and met Safety Considerations for this Instrument WARNING Any interruption of the protective grounding conductor inside or outside th
42. being tested as required If unknown increase the volume control until the AC Level meter stops increasing or at maximum Measurement results are displayed on the Test Set as shown RX TEST a AC Level 1 08224 2 010 Audio Output Avg RF Gen Freg AFGen1 Freq AFGen2 Freq Filter 1 To Screen 8 310700 1 0000 1 0000 50Hz HPF MHz Hz Hz Amplitude AFGen1 To AFGen2 To Filter 2 EEN FM FM 15kHz HPF m ojii ojii Atten Hold Ext Load R Output Port RF Out Dupl SSB Receivers On the Test Set using the knob and data entry keys 18 Set AF Freq meter to measure Distortion 19 Select AC Level 20 Press the REF SET key On the Radio set the Receiver s Controls as follows 21 Decrease the Receiver s volume control until the AC Level meter reads 3 dB Distortion measurement results are displayed on the screen as shown RX TEST AC Level Distortion 1 08224 3 10 Avg Ref RF Gen Freg AFGen1 Freg AFGen2 Freg Filter 1 To Screen 8 310700 1 0000 INN a MHz Hz Hz Amplitude AFGen1 To AFGen2 To Filter 2 15kHz HPF m Atten Hold On Off Ext Load R Output Port IRF_Out Dup 177 SSB Receivers SSB Sensitivity Measurement Description This procedure is used to measure an SSB Receiver s receiver sensitivity Sensitivity is displayed in various measurement units on the Test Set screen 3 Knob Data Entry 2 Keys C SCRE
43. changes the units that the marker amplitude is displayed in 195 Using the Spectrum Analyzer Field Strength Measurements 196 Description This procedure is used to measure and calculate field strength with the Spectrum Analyzer Tracking Generator option A calibrated antenna is connected to the ANT IN connector a measurement is performed and the field strength is calculated in dBuV m or un V m Knob Data Entry 2 Keys X SCREEN CONTROL INSTRUMENT STATE MSSG HELP pwriG morb PRINT Api SAVE 1 77 DATA functions m GG pata ml es 7 Ls lo t CURSORFONTROL ED mer 530 4 5 6 ES mt oje LA Eve ws w a m paa Ee I ER NI MIC ACC VOLUME SQUELCH AUDIO OUT AUDIO IN RF IN OUT DUPLEX OUT oo G6 A avn J d Using the Spectrum Analyzer Test Set Options Required Spectrum Analyzer Tracking Generator option 102 Additional Equipment Calibrated antenna Required Special Test Considerations The antenna should be resonant at the frequency of inter est Also to accurately calculate field strength the antenna factor or gain of the antenna must be known and losses in the cabl
44. damage may result On the Test Set 2 Press the PRESET key 3 Press the TX key Using the knob 4 Set AF Anl In to AM Demod On the Radio 5 Key the Transmitter and keep keyed until the remaining steps are completed On the Test Set using the knob and data entry keys 6 Set AFGen1 Lvl so that displayed AM depth is 85 131 AM Transmitters 7 Select SPEC ANL screen 8 Set Span to 7 7 MHz 9 Set Ref Level to place the carrier peak at the top graticule line To set Ref Level From the Marker screen select Marker To Peak Select Marker To Ref Level 10 Tune Center Freq in MHz steps anywhere from 400 kHz to 1 GHz in search of harmonics subharmonics multiples or spurious emissions 11 Un key the Transmitter NOTE If spurious emissions are suspect and verify that emissions are from the transmitter and not another source To measure spurious emission of the transmitter under test Place at center frequency e Or perform the following a Select Main from the Controls field b Select Markers from the Choices field c Position the marker on the desired peak Position or Next Peak Marker frequency and level are displayed as shown SPECTRUM ANALYZER BW 3 kHz bossi b esaapanaa tist Marker 1 1 Freq Spurious or Harmonic Level amp Frequency 132 AM Transmitters AM Envelope Display Measurement Description This procedure is used to measure an AM Transmitt
45. entry keys 4 Set AF Anl In to SSB Demod Determine readout measurement 5 For actual frequency readout continue with step 7 6 For frequency error a Set Tune Mode to Manual b Set Tune Freq to the expected carrier frequency On the Radio 7 Key the Transmitter and keep keyed until the remaining steps are complete 164 SSB Transmitters On the Test Set using the knob and data entry keys 8 Set AFGen1 Lvl until a measurable RF signal is displayed typically gt 5 10 mV Frequency or frequency error is displayed as shown Fre quenc TX TEST TX Freq Error kHz 0 119 TX TEST TX Frequency AC Level 28 310885 0 2845 TX Power JAF Freq 19 5 0 16522 Frequency Output Power Tune Mode Tune Freq 28 311000 MHz TX Pwr Zero Zero AF Anl In AFGen1 Freq To Screen SSB Demod 1 0000 MHz Filter 1 AFGen1 Lvl Input Port IF Filter 15 kHz ilter Ext TX Key e Emphasis etector Calculate the Measurement NOTE Do not use the displayed AF Freq for the AFGenl Freq in the calculation 9 Calculate the frequency or frequency error as follows Frequency TX Frequency AFGenl Freq For example 28 310885 MHz 1 kHz 28 309885 MHz Frequency Error TX Freq Error AFGenl Freq For example 0 119 kHz 1 kHz 1 119 kHz 165 SSB Transmitters SSB Rated Output Power Carrier Suppr
46. of high quality coaxial cable and high quality adapters when connecting the device connected to the Test Set to ensure the most accurate power measurement Double shielded coaxial cable is recommended when performing measurements on Cavities and Duplexers Cable and Adapter Loss Remember that cable and adapter losses and mismatch must be considered when measuring RF power at VHF UHF frequencies If losses are known they can be entered using the CONFIGURATION screen Once entered the measurement results are adjusted accordingly Incidental Audio Incidental audio into a built in or attached microphone may cause inaccurate readings Whenever possible disable the microphone input or minimize ambient audio during the measurement Transmitter s DTMF CTCSS and or CDCSS Functions Verify that the Transmitter s DTMF CTCSS and or CDCSS functions are OFF if equipped unless otherwise specified Receiver Test Loads If using the Test Load the measurement must be performed with only the load connected to the Receiver s audio output circuitry internal speaker disconnected If the external speaker jack does not break the Measurement Guideline 3 internal speaker connection either the Test Set AUDIO IN signal must be connected across the speaker in this case enter the impedance value of the speaker in lieu of the test load resistance or the internal speaker must be physically disconnected Measuring Audio Output Power When
47. step procedures required to perform each measurement with illus trations Refer to Configuring for Measurements on page 243 or the Test Set s User Guide on preparing the Test Set for operation 116 List of Tests List of Tests AM Transmitter Measurements AM Off The Air Monitoring Determining Unknown Transmitter Carrier Frequency on page 119 AM Output Power Deviation and Frequency Frequency Error Measurement on page 122 AM Microphone Sensitivity and Modulation Limiting Measure ment on page 125 AM Audio Distortion Measurement on page 128 AM Harmonics and Spurious Output Measurement on page 130 AM Envelope Display Measurement on page 133 AM Receiver AM Audio Output Power Measurement on page 137 AM Sensitivity Measurement on page 140 AM Audio Output Power Measurement on page 137 AM AGC Measurement on page 143 AM Squelch Sensitivity Measurement on page 146 AM Audio Frequency Response Measurement on page 149 AM Audio Distortion Measurement on page 152 AM Spurious Response Attenuation Measurement on page 155 117 AM Transmitters AM Transmitters The following measurements are provided for testing AM Transmit ters The procedures are arranged in the order that tests are typically performed 118 AM Transmitters AM Off The Air Monitoring Determining Unknown Transmitter Carrier Fre quency NOTE Description This procedure is used to locate demodulate
48. test programs loaded from Memory Cards internal ROM RAM or an external disk drive RF Generator used to control and display the RF and modulation signals RF Analyzer used to process and display RF signal measurements AF Analyzer used to process and display audio signal measurements Oscilloscope used to display the oscilloscope measurement function with vertical time trigger and marker controls Configure used to control the various functions including date screen intensity various RF controls etc I OConfigure used to control the various functions including HP IB serial parameter etc Print Configure used to setup a printer Adjacent Channel Power used to control measuring power of signals at a specific channel spacing above and below the RF Analyzer s center frequency The Test Set s Features Screens that Require an Option Spectrum Analyzer used to display the spectrum analyzer measurement function with center frequency span reference level marker and tracking generator controls Encoder used to display the signalling encoder function with function generator tone sequence DTMF CDCSS digital paging cellular and LTR and EDACS trunking subscreens Decoder used to display the decoded data signalling with function generator tone sequence DTMF CDCSS digital paging cellular and LTR and EDACS trunking subscreens Radio Interface used to control the various funct
49. the PRESET key 3 Press the RX key Using the knob and data entry keys Set RF Gen Freq to the receiver operating frequency Set Amplitude to 47 dBm 1 mV Set AFGen1 To OFF Set Ext Load R to the test load resistance Set AC Level meter to measure Watts 2 FP NA E a Set SINAD meter to measure AF Freq On the Radio set the Receiver s Controls as follows 10 Set power to ON 11 Set mode to LSB or USB 12 If required set frequency to the same value as step 4 13 Set squelch to minimum 14 Set RIT to center or disable if equipped 15 Set RF Gain to maximum if equipped 183 SSB Receivers On the Test Set using the knob and data entry keys 16 Change the value of RF Gen Freq until the AF Freq meter reads 7 kHz On the Radio set the Receiver s Controls as follows 17 Set the Receiver s volume control until the AC Level meter indicates the Receiver s rated output power Refer to audio output specifications for the Receiver being tested as required If unknown increase the volume control until the AC Level meter stops increasing or at maximum On the Test Set using the knob and data entry keys 18 Set Amplitude to 137 dBm On the Radio set the Receiver s Controls as follows 19 Set the Receiver s squelch control until the squelch just closes On the Test Set using the knob and data entry keys 20 Increase Amplitude until the Receiver s squelch just ope
50. the Test Set for DC Operation Inthe CONFIGURE screen use the knob and data entry keys to set the fol lowing parameters as required Intensity adjust to comfortable level Beeper adjust to comfortable level RFGen Volts sets RF and Tracking Generator amplitudes reference for 50 Q or an open circuit voltage Date set if incorrect Time set if incorrect Press the front panel PRESET key The Test Set is now ready for operation 247 Preparing the Test Set for DC Operation 248 References This chapter contains a listing of all documents that have been referenced in this manual 249 Manuals Manuals e HP 8920A User s Guide e HP 8920B User s Guide e HP 11807A Option 001 Reference Guide System Support Tests HP 11807A Option 100 User s Guide 250 Application Note Application Note Demonstration Procedures HP 8920A RF Communications Test Set 251 Specifications and Standards Specifications and Standards 252 ANSI EIA 152 C 1988 Minimum Standards for Land Mobile Communi cation FM or PM Transmitters 25 866 MHz ANSI EIA TIA 204 D 1989 Minimum Standards for Land Mobile Com munication FM or PM Receivers 25 866 MHz EIA RS 382 Minimum Standards Citizens Radio Service AM Transceiv ers Operating in the 27 MHz Band 10 HP 8920A Specifications 253 254 Specifications describe the Test Set s warranted performance and are valid ov
51. the desired peak Position or Next Peak Marker frequency and level are displayed as shown SPECTRUM ANALYZER BW 3 kHz bossi b esaapanaa tist Marker 1 1 Freq Spurious or Harmonic Level amp Frequency 172 SSB Receivers SSB Receivers The following measurements are provided for testing SSB Receivers The procedures are arranged in the order that tests are typically per formed 173 SSB Receivers SSB Audio Output Power and Distortion Measurement Description This procedure is used to measure an SSB Receiver s audio output power and distortion into a Test Load Output power is displayed in various measurement units including watts on the Test Set screen Distortion is measured and displayed at one half the rated audio output Reference is IEC 489 5 paragraph 3 1 2 3 Knob Data Entry 2 Keys SCREEN CONTROL INSTRUMENT STATE EF PRINT msio HELP cqNFIG HOLD ADRS SAVE AUSER DATA HUNCTIONS D TA ser MEI m ini g CURSOR CONTROL D m cance wor Em Las VOLUME SQUELCH AUDIO OUT AUDIO IN HI MIC ACC RF IN OUT 509 COXIAL CABLE SPEAKER AUDIO INPUT ANTENNA RF INPUT 174 SSB Receivers
52. the spectrum analyzer to the carrier power from the in put section RF power detector Level Range Antenna Not applicable RF Input 1 mW 0 dBm to 60 W 47 8 dBm continuous or up to 100 W 50 dBm for 10 seconds minute Dynamic Range Typical values for channel offsets Spectrum Analyzer Specifications Option 102 Table 6 Channel Resolution Dynamic Offset Bandwidth Range 12 5 kHz 8 5 kHz 65 dBc 20 kHz 14 kHz 68 dBc 25 kHz 16 kHz 68 dBc 30 kHz 16 kHz 68 dBc 60 kHz 30 kHz 65 dBc Absolute Accuracy RF power measurement accuracy for absolute in channel power for inputs gt 200 mW 10 of reading 1 mW in dB plus ACP relative accuracy of 2 0 dB 275 Signaling Option 004 Signaling Option 004 276 Capability for generating and analyzing the following formats CDCSS DTMF 1 TONE 2 TONE 5 6 TONE SEQUENTIAL RPCI POCSAG EIA CCITT CCIR ZVEI DZVEI GOLAY EEA AMPS EAMPS NAMPS TACS ETACS JTACS NTACS NMT 450 NMT 900 LTR EDACS MPT 1327 and TDMA dual mode LTR isa registered trademark of the E F Johnson Company EDACS is a trademark of Ericsson GE over 15 to 35 C for analyzing A General Purpose Function Generator with the following waveforms is included sine square triangle ramp dc Gaussian white noise uniform white noise Frequency Range and Level Same as audio source DC Current Meter Option 103
53. while the audio frequency is varied over the receivers range The FM reference is ANSI EIA TIA 204D 3 Knob DataEntry 2 Keys SCREEN CONTROL INSTRUMENT STATE Ey HELP CONFIG HOLD PRINT DATA HUNCTIONS p rA U FSET METER AVG aAA Ls 9 B Em F 9 jJ Gu CURSOR CONTROL onom ma 8 e pe Le pav av MIC ACC VOLUME SQUELCH AUDIO OUT AUDIO IN e oo y 9 Lasd RF IN OUT DUPLEX OUT POWER or ON 500 COXIAL SPEAKER CABLE AUDIO INPUT ANTENNA RF INPUT 105 FM Receivers Additional Equipment Test Load Required See Receiver Test Loads on page 46 Special Test Considerations Sce Caded Synelch um pape 47 Measurement Procedure 1 Connect the Receiver as shown On the Test Set 2 Press the PRESET key 3 Press the RX Key Using the knob and data entry keys 4 Set RF Gen Freq to the receiver operating frequency 5 Set Amplitude to 47 dBm 1 mV 6 Set AFGenl To 60 of the Receiver s specified maximum frequency de viation typically 3 kHz 7 Set Filter 1 to 20 Hz HPF 8 Set Ext Load R to the test load resistance 9 Set AC Level meter to measure Watts On the Radio set the Receiver s
54. will also have to be changed 11 From the Controls select RF Gen 12 Select Main from the Choices field 13 Set Ref Lvl to place the signal close to the top graticule line Normalize to remove the effects of the cables bridge coupler etc as follows 14 From Controls select Main 15 Select Auxiliary from the Choices field 16 From Normalize select A Only 17 From Normalize select Save B 18 From Normalize select A B 19 From Controls select Auxiliary 20 Select Main from the Choices field Coax Stub 21 Connect the stub as shown MIC ACC VOLUME SQUELCH AUDIO OUT AUDIO IN Li o O0 6 9 A25 Lass A RF IN OUT DUPLEX OUT o Coax Stub Open Notch W A Shorted band Using the Tracking Generator On the Test Set using the knob and data entry keys 22 From Controls select Main 23 Select Marker from the Choices field 24 Use the Marker position to measure the response Notch depth is displayed as Lvl Bandwidth 3 dB points is measured using the LVL and Freq display NOTCH NOTCH DEPTH BANDWIDTH RNRL Y Z EJ WN2300JkHz 1591 50 89 ENCODER t DECODER Center Frea Ref Level Span ER OIO IHT S es NNDIEDDDDDM MHz dBm MHz The notch or band pass frequency can be changed by trimming the coaxial filter in small increments BANDPASS BANDWIDTH SRECTRUM ANALYZER i BW 300 kHz Marker Frea
55. 12 8 Distortion 129 AM Transmitters AM Harmonics and Spurious Output Measurement Description This procedure is used to measure an AM Transmitter s conducted harmonic and spurious emissions The spectrum analyzer option is used to display harmonic and spurious components from 400 kHz to 1000 MHz 3 Knob Data Entry 2 Keys 477777 INSTRUMENT STATE s E z3 amp VOLUME SQUELCH AUDIO OUT MIC ACC RF IN OUT 500 COXIAL SHEILDED ADUIO CABLE ANTENNA MICROPHONE RF OUT AUDIO INPUT 130 AM Transmitters Test Set Options Required Spectrum Analyzer Tracking Generator option 102 Cable and adapter mismatch must be considered when measuring harmonics and spurious emissions of a trans mitter If an external attenuator is used special care must Special Test Considerations be taken to ensure the attenuator is not causing any spuri ous or harmonic emission Also if spurious emissions are located verify that the transmitter is the source and not another object radiated emissions near the test site CAUTION Measurement Procedure 1 Connect the Transmitter as shown The RF present at the Test Set RF IN OUT connector must not exceed 60W continuous or 100 Watts for 10 sec minute or permanent instrument
56. 5 Set RF Power to ON Set Output Level to 31 6 mV Set Output Frequency to lowest frequency being checked typically lt 1 MHz Set Modulation to internal FM Set Modulation rate to 400 Hz Set Modulation Deviation to 3 kHz Tune the Signal Generator in kHz steps from the minimum to maximum frequency and note frequencies where SINAD decreases below 12 dB CJ If necessary increase tuning resolution on the Signal Generator and ad just as required to locate frequency causing maximum degradation of the SINAD reading For each frequency where SINAD is degraded reduce the Signal Generator RF output level until SINAD of 12 dB is obtained e Record the Signal Generator frequency and level Repeat step 23and step 24 until all spurious responses are measured Calculate the Spurious Response 26 The minimum result is the calculated spurious response attenuation Each Spurious response level recorded in step 25 Amplitude level recorded step 17 calculated spurious response attenuation Testing AM Radios 115 Introduction Introduction Each procedure may contain the following information e A brief measurement overview and a reference to applicable TIA EIA spec ifications for each test e A list of the Test Set options and additional test equipment required to per form the procedure e Any special test considerations that need to be considered for safety mea surement accuracy etc e Step by
57. 6 dB SINAD for tones from 300 Hz to 10 kHz measured with the 299 kHz LPF Residual THD Noise 60 dB or 150 uV whichever is greater for tones from 300 to 1500 Hz measured with the 15 kHz LPF 57 dBc or 450 uV whichever is greater for tones from 300 Hz to 10 kHz measured with the gt 99 kHz LPF Resolution 0 01 dB 269 AF Analyzer Specifications Audio Filters Standard lt 20 Hz HPF 50 Hz HPF 300 Hz HPF 300 Hz LPF 3 kHz LPF 15 kHz LPF gt 99 kHz LPF 750 de emphasis 1 kHz notch Optional C Message CCITT 400 Hz HPF 4 kHz BPF 6 kHz BPF 300 Hz to 10 kHz variable option 019 Audio Detectors RMS RMS SQRT2 Pk Pk Pk hold Pk hold Pk 2 Pk 2 hold Pk max Pk maxhold 270 Oscilloscope Specifications Oscilloscope Specifications Frequency Range 2 Hz to 50 kHz 3 dB BW Scale Division 10 mV to 10 V Amplitude Accuracy 1 5 of reading 0 1 division 20 Hz to 10 kHz Time Division 1 usec to 200 msec 3 dB Bandwidth Typically gt 100 kHz Internal DC Offset lt 0 1 div 250 uV div sensitivity 271 Spectrum Analyzer Specifications Option 102 Spectrum Analyzer Specifications Option 102 Frequency Frequency Range 400 kHz to 1 GHz Frequency Span Resolution Bandwidth coupled Table 4 Span Bandwidth lt 50 kHz 300 Hz lt 200 kHz 1 kHz lt 1 5 MHz 3 kHz lt 18 MHz 30 kHz gt 18 MHz 300 kHz Full span Display Log with 10 dB
58. 94 Description This procedure is used to measure an FM Receivers critical squelch and maximum squelch sensitivity For critical squelch the receiver is just squelched with minimum modulated input at the Receiver s antenna then the input is increased until the squelch is opened Maximum squelch is the amount of modulated signal required to open the squelch when the control is set to maximum Minimum and maximum squelch hysteresis is also measured and calculated The FM reference is EIA TIA 204 D 3 Knob Data Entry 2 Y i Ly a SCREEN CDNTROL INSTRUMENT STATE USER DATA FUNCTIONS Ey Go DATA eee ES ERE 7j Cs lo 4 4 mie ei x E 5 4 5 6 us cursor CONTROL m E Diol m kHz mL 0JL C E E es ome jen ES E um EN aw A MIC ACC VOLUME SQUELCH AUDIO OUT AUDIO IN RF IN OUT DUPLEX ANT ee 556 66 Asinio mc 1 RECEIVER UNDER TEST ANTENNA RF INPUT FM Receivers Special Test Considerations See Coded Squelch on page 47 Measurement Procedure 1 Connectthe Receiver as shown On the Test Set 2 Press the PRESET key 3 Press the RX Key Using the knob and data entry keys 4 Set RF Gen Freq to the receiver operating frequency 5 Set Amplitude to 137 dBm On the Radio set
59. AFGen2 To Filler 2 E FUE FM H5kHz HPF u ojii Atten Hold On Off Ext Load R Output Port EXT CJ If desired use the meter averaging function for the SINAD indicator a Select dB on the SINAD meter b Press the AVG key CJ If desired select the number of readings to average Enter the number of readings to average Higher number of readings averaged will require longer to reach the final indication 142 AM Receivers AM AGC Measurement Description This procedure is used to measure an AM Receiver s Automatic Gain Control AGC A reference is established at 13 dB below full rated audio output and the Receiver s output level and distortion are measured with inputs varying from 500 mV to 5 Q V 3 Knob DataEntry 2 Keys ST SCREENCONTROL INSTRUMENT STATE fy msio me c HOLD PRINT ADRS SAVE s DATA HUNCTIONS p rA E ETER AVG Jil 7jL8 9 es T w Fa m V 141 5 16 m CURSOR CONTROL r TE Cj 1 21 31pP2 7 E Nona mnc 0 LA INS NN a pm fe Ee Ey S MIC ACC VOLUME SQUELCH AUDIO OUT RF IN OUT DUPLEX OUT 509 COXIAL CABLE SPEAKER AUDIO INPUT ANTENNA RF INPUT 143 AM Receivers Additional Equipment Required Test Load Speci
60. AFGen2 To Filter 2 O Audio Out 15kHz HPF u 10 00 m Atten Hold On Off Ext Load R 15 Set Amplitude units to dBm 16 Increase Amplitude more positive by 3 dB e Record Amplitude setting for later use 157 AM Receivers 158 On the Signal Generator 17 18 19 20 21 22 23 24 25 Set RF Power to ON Set Output Level to 31 6 mV Set Output Frequency to lowest frequency being checked typically 1 MHz Set Modulation to internal AM Set Modulation rate to 400 Hz Set Modulation Depth to 30 Tune the Signal Generator in 1 kHz steps from the minimum to maximum frequency and note frequencies where SINAD decreases below 10 dB O If necessary increase tuning resolution on the Signal Generator and ad just as required to locate frequency causing maximum degradation of the SINAD reading For each frequency where SINAD is degraded reduce the Signal Generator RF output level until SINAD of 10 dB is obtained e Record the Signal Generator frequency and level Repeat step 23 and step 24 until all spurious responses are measured Calculate the Spurious Response 26 The minimum result is the calculated spurious response attenuation Each Spurious response level recorded in step 25 Amplitude level recorded step 17 calculated spurious response attenuation Testing SSB Radios 159 Introduction Introduction Each procedure may contain the following inform
61. AM 1 kHz rate in a 0 3 to 3 kHz BW Input Level for Specified Accuracy levels in PEP Standard 18 to 50 dBm at RF IN OUT 0 016 mW to 100 W 50 to 14 dBm at ANT IN Option 007 32 to 36 dBm at RF IN OUT 0 63 UW to 4 0 W Option 008 28 to 40 dBm at RF IN OUT 1 6uW to 10 W Residual AM lt 0 2 in a 0 3 to 3 kHz BW Resolution 0 1 265 RF Analyzer Specifications SSB Measurement Frequency Range 400 kHz to 1 GHz Bandwidth 3 dB 20 Hz to 70 kHz Distortion and Noise lt 3 at 1 kHz rate in a 0 3 to 3 kHz BW 266 RF Analyzer Specifications TDMA Analyzer HP 8920D or 8920A with Option 050 and HP 83201A Frequency Range 824 MHz to 894 MHz Input Level Range RF In Out 1 mW to 60W 0 to 47 8 dBm Antenna 36 to 17 dBm Input Frequency Setting Error 1 kHz RX DSP Level Setting Range 23 to 0 dB full scale Residual Error Vector Magnitude lt 1 3 Error Vector Magnitude Measurement Accuracy 0 4 plus 2 of reading Residual Phase Error lt 1 0 Residual Magnitude Error lt 0 9 I Q Origin Offset Accuracy 0 5 dB for values to 40 dBc Frequency Error Accuracy 42 5 Hz plus timebase accuracy 267 AF Analyzer Specifications AF Analyzer Specifications Frequency Measurement Measurement Range 20 Hz to 400 kHz Accuracy 0 02 plus resolution plus timebase accuracy External Input 20 mV to 30 Vrms Resolution f 10 kHz 0 01 Hz f 100 kHz 0 1 Hz f 2100 kHz I Hz AC Volta
62. AVE lUSERD DATA HUNCTIONS By D TA E ee CAS xu e Wa Cs o kr HI LIMIT a x E 4 i5 6 Lae CURSOR CONTROL P ASSIGN 1 2 3 CER pusa To LECT oji A Lx E YES NO a ms E Se amp MIC ACC VOLUME SQUELCH AUDIO OUT RF IN OUT DUPLEX OUT I 509 COXIAL CABLE ANTENNA RF INPUT TEST LOAD 1 RECEIVER UNDER TEST SPEAKER AUDIO 87 FM Receivers Required Additional Equipment Test Load Special Test Considerations See Receiver Test Loads on page 46 Measurement Procedure 1 Connect the Receiver as shown On the Test Set 2 3 Press the PRESET key Press the RX key Using the knob and data entry keys 4 5 6 88 Set RF Gen Freq to the receiver operating frequency Set Amplitude to 47 dBm 1 mV Set AFGen1 To 60 of the Receiver s specified maximum frequency de viation typically 3 kHz Set Ext Load R to the test load resistance Set AC Level meter to measure Watts NOTE FM Receivers On the Radio set the Receiver s Controls as follows 9 Set power to ON 10 If required set frequency to the same value as step 4 11 Set squelch to minimum 12 Set RF Gain to maximum if equipped 13 Set coded squelch feature if equipped to O
63. About this Manual We ve added this manual to the Agilent website in an effort to help you support your product This manual is the best copy we could find it may be incomplete or contain dated information If we find a more recent copy in the future we will add it to the Agilent website Support for Your Product Agilent no longer sells or supports this product Our service centers may be able to perform calibration if no repair parts are needed but no other support from Agilent is available You will find any other available product information on the Agilent Test amp Measurement website www tm agilent com HP References in this Manual This manual may contain references to HP or Hewlett Packard Please note that Hewlett Packard s former test and measurement semiconductor products and chemical analysis businesses are now part of Agilent Technologies We have made no changes to this manual copy In other documentation to reduce potential confusion the only change to product numbers and names has been in the company name prefix where a product number name was HP XXXX the current name number is now Agilent XXXX For example model number HP8648A is now model number Agilent 8648A HP 8920A amp HP 8920B RF Communications Test Set Application Handbook INT ADRS save AUDIO IN cance pv T ANTIN MIC VOL
64. Controls as follows 10 Set power to ON 11 If required set frequency to the same value as step 4 12 Set RF Gain to maximum if equipped 13 Set coded squelch feature to minimum if equipped 14 Set the volume control until the AC Level reads 50 of the Receiver s specified audio output Refer to the audio output specifications for the receiver being tested 106 NOTE FM Receivers On the Test Set using the knob and data entry keys 15 Set AFGen1 To 20 of the Receiver s maximum frequency deviation 1 kHz for Receivers with specified maximum frequency deviation of 5 kHz 16 Select AC Level 17 Press the REF SET key 18 Change AFGen1 Freq from 300 Hz to 3 kHz while observing AC Level Meter Frequency Response is displayed on the screen as AC Level in relative dB from 300Hz to 3 kHz as shown The audio response should not vary more than 2 to 8 dB Receiver s with loudspeakers or 1 to 3 dB Receivers with headphones or feed line from a standard 6 dB per octave de emphasis curve over the frequency range of 300 to 3000 Hz RX TEST SU AC Level Audio Fre 0 0 07 7 61 quency Ref Response RF Gen Freq AFGen1 Freq AFGen2 Freq Filter 1 To Screen 145 280000 E DONE HPF MHZ Hz Hz Amplitude AFGen1 To AFGen2 To Filter 2 FM 5kHz HPF u ojii Atten Hold On Off Ext Load R Output Port EXT IRF Out Dupl 107 FM Receivers FM Audio Distortion Measurement Description
65. EN CONTROL 77 INSTRUMENT STATE Y PRINT msie HELP cqNFIG HOLD ADRS save JUNCTIONS J v ra f ry CONTROL e Eo en ES T MIC ACC VOLUME SQUELCH AUDIO OUT AUDIO IN HI RF IN OUT DUPLEX OUT 509 COXIAL CABLE SPEAKER AUDIO INPUT ANTENNA RF INPUT 178 SSB Receivers Additional Equipment Test Load Required Special Test Considerations See Receiver Test Loads on page 46 Measurement Procedure 1 Connect the Receiver as shown On the Test Set 2 Press the PRESET key 3 Press the RX key Using the knob and data entry keys Set RF Gen Freq to the receiver operating frequency Set Amplitude to 47 dBm 1 mV Set AFGen1 To OFF Set Ext Load R to the test load resistance Set AC Level meter to measure Watts 2 FP NA E a Set SINAD meter to measure AF Freq On the Radio set the Receiver s Controls as follows 10 Set power to ON 11 Set mode to LSB or USB 12 If required set frequency to the same value as step 4 13 Set squelch to minimum 14 Set RIT to center or disable if equipped 15 Set RF Gain to maximum if equipped 179 SSB Receivers 180 On the Test Set using the knob and data entry keys 16 Cha
66. F OUT AUDIO INPUT 125 AM Transmitters Special Test Considerations See Incidental Audio on page 46 Measurement Procedure 1 Connect the Transmitter as shown CAUTION The RF present at the Test Set RF IN OUT connector must not exceed 60W continuous or 100 Watts for 10 sec minute On the Test Set 2 Press the PRESET key 3 Press the TX key Using the knob and data keys 4 Set AF Anl In to AM Demod 5 Set Filter 1 to 300 Hz HPF 6 Set Filter 2 to 3 kHz LPF On the Radio 7 Key the Transmitter and keep keyed until the remaining steps are completed On the Test Set using the knob and data entry keys 8 Set AFGen1 Lvl so that displayed AM depth is 30 On the Test Set Microphone Sensitivity is shown as AFGen1 Lvl 126 AM Transmitters TX TEST TX Frequency AM Depth 28 310176 TX Power 18 3 Tune Mode Input Port AF Anl In Tune Freq IF Filter Filter 1 ET IERI 00Hz HPF MHz ilter TX Pwr Zero Ext TX Key g aa On Off etector Microphone Sensitivity 9 Set AFGen1 Lvl measurement units to dBm 10 Increase AFGen1 Lvl by 20 dB Displayed AM depth should not exceed 100 11 Change AFGen1 Freq from 300 Hz to 3 kHz in 100 Hz increments 12 Verify that the displayed AM depth does not exceed 100 127 AM Transmitters AM Audio Distortion Measurement Description This procedure is used to measure an AM Transmitter s audio frequency harmonic distortion lev
67. FF Failure to set coded squelch to off will cause the SINAD measurement to be incorrect 14 Set the volume control until the AC Level reads 100 of the Receiver s rat ed audio output power Refer to the audio output specifications for the receiver being tested On the Test Set using the knob and data entry keys 15 Decrease Amplitude until the SINAD meter reads 12 dB Sensitivity 12dB SINAD is displayed as Amplitude as shown Record the frequency as Assigned Freq for use later in the procedure RX TEST AC Level 0 2775 Assigned High Low Frequency RF Gen Freq AFGen1 Freq AFGen2 Freq Filter 1 To Screen LEHENE 1 0000 _ 1 0000 ESSEN MHz Hz Hz Amplitude AFGen1 To AFGen2 To Filter 2 BE u PM ot 15kHz HPF m Atten Hold On Off Ext Load R Output Port EXT RF Out Dupl 89 FM Receivers 90 CJ If desired use the meter averaging function for the SINAD indicator a Select dB on the SINAD meter b Press the AVG key CJ If desired select the number of readings to average Enter the number of readings to average Higher number of readings averaged will require longer to reach the final indication 16 Increase Amplitude more positive by 6 dB 17 Increase RF Gen Freq in 100 Hz steps until the SINAD meter again reads 12 dB Record the frequency as High Freq for use later in the procedure 18 Decrease RF Gen Freq in 100 Hz steps until the SINAD meter again reads 12 dB e Re
68. FM Transmitters FM Deviation and Symmetry Measurement This procedure is used to measure an FM Transmitter s frequency deviation and deviation symmetry FM deviation is displayed on the Test Set Deviation symmetry requires measuring the plus and minus peaks then calculating symmetry 3 Knob Data Entry 2 Keys I SCREEN CONTROL INSTRUMENT STATE a dowriG HoLD PRINT ADRS SAVE m DATA eem 7 Ls Lo Be CURSOR CONTROL F a eal 7 one enor ESAE lew MIC ACC VOLUME SQUELCH AUDIO OUT AUDIO IN HI Lo OG Aeon RF IN OUT DUPLEX OUT ANTIN Lu SHEILDED CABLE AUDIO CABLE ANTENNA MICROPHONE RF OUT AUDIO INPUT 59 FM Transmitters Measurement Procedure 1 Connect the Transmitter Under Test as shown CAUTION The RF present at the Test Set RF IN OUT connector must not exceed 60W continuous or 100 Watts for 10 sec minute On the Test Set 2 Press the PRESET key 3 Press the TX key On the Radio 4 Keythe Transmitter and keep keyed until the remaining steps are complete On the Test Set using the knob and data entry keys 5 Set AFGenl Lvl so that displayed FM deviation is 60 of the Transmit ter s specified maximum frequency deviation typically 3 kHz O
69. Hysteresis is the difference between the two readings On the Radio set the Receiver s Controls as follows 18 Set the Receiver s squelch control to maximum On the Test Set using the knob and data entry keys 19 Increase Amplitude until the Receiver s squelch just opens e Record this level 20 Record the maximum squelch sensitivity is displayed as Amplitude as shown 21 Decrease Amplitude until the Receiver s squelch just closes e Record this level Calculate the reading 22 Maximum Squelch Hysteresis is the difference between the two readings 148 AM Receivers AM Audio Frequency Response Measurement Description This procedure is used to measure an AM Receiver s audio frequency response A reference is established at 50 of the Receiver s rated audio output then the output is measured while the audio frequency is varied over the receivers range 3 Knob Data Entry 2 Keys 7 SCREEN CONTROL 77 INSTRUMENT STATE Gf HEP CONFIG DATA H CURSOR CONTROLE Y e w otav av MIC ACC VOLUME SQUELCH AUDIO OUT RF IN OUT DUPLEX OUT 500 COXIAL CABLE SPEAKER AUDIO INPUT ANTENNA RF OUT 149 AM Receivers Additional Equipment Test Load Require
70. IA TIA 204D 3 Knob Data Entry 2 SCREEN CONTROL A INSTRUMENT STATE LP CONFIG HOLD PRINT ADRS SAVE DATA FUNCTIONS DATA REFSET METIR AVG E EAE 7 8 lo Be t an 4 5 6 co CURSOR CONTROL E MHz y 1j 2 13 I RELEASE m PUSH TO SELECT EMI JcanceL 0 P ae emn jos o e s MIC ACC VOLUME SQUELCH AUDIO OUT RF IN OUT DUPLEX OUT ANTIN HI yp e A MAX POWER 2000 IN COMBINER SHEILDED ADUIO CABLE TO SIGNAL Ee l GENERATOR S ANTENNA RF INPUT AUDIO RF OUTPUT cory 111 FM Receivers Required Additional Equipment Signal Generator HP 8647A and a Power Splitter Combiner HP 11636A Special Test Considerations See Coded Squelch on page 47 CAUTION 112 Measurement Procedure Before connecting the Signal Generator set RF Output power to OFF or maximum attenuation 1 Connect the Receiver and Signal Generator as shown On the Test Set 2 Press the PRESET key 3 Press the RX key Using the knob and data entry keys 4 Set RF Gen Freq to the receiver operating frequency 5 Set Amplitude to 47 dBm 1 mV 6 Set AFGenl To 60 of the Receiver s specified maximum frequency de viation typically 3 kHz 7 Set Ext L
71. Measurements Using the Track Control Fields From Controls select Track e Offset Freq sets the difference between the instantaneous frequencies of the Tracking Generator RF output and the Center Frequency of the Spectrum Analyzer The frequency range is determined by the Spectrum Analyzer s Span setting NOTE The offset function is useful when looking at frequency translating devices or anytime you need to sweep around a frequency while analyzing another During normal operation offset is set to 0 00 Amplitude sets the RF output amplitude e Port Sweep routes the RF output to the RF Out or Duplexer Out connector This field also is used to select if the tracking generator sweeps from low to high frequencies Norm or from high to low Invert The Spectrum Analyzer always seeps from low to high RLYZER 3 kHz Marker rea 145 28000 SPECTRUM RN BH Lvl 4 PEST RHL it aycteesenet SPEC H EXCOOEF DEC ODEF Su FACIO THT ut E l1 208 Using the Tracking Generator Measurements Using the Fixed Control Fields From Controls select Fixed RF Gen Freq sets the RF output frequency Amplitude sets the RF output amplitude Output Port routes the RF output to the RF Out or Duplexer Out connector SBEGTIRUM ANALYZER BW 3 rea 145 28000 Lvl 38 ull Outbut Port dba 209 Using the Tracking Generator Antenna Return Loss VSWR Measurement amp Tuning 210 Descri
72. N amp Ww Amplitude default of O dBm is typically sufficient for performing measurements The level can be changed as required to suit measurement needs e g increase measurement range minimize incident input from other sources etc If Amplitude is changed Ref Level will also have to be changed On the Directional Coupler 11 Verify that the LOAD port is open or shorted 211 Using the Tracking Generator Normalize to remove the effects of the cables bridge coupler etc as follows 12 From Controls select RF Gen 13 Select Auxiliary from the Choices field 14 From Normalize select A Only 15 From Normalize select Save B 16 From Normalize select A B 17 From Controls select Auxiliary 18 Select Main from the Choices field Antenna 19 Connect the antenna under test as shown Antenna SCREEN CONTROL INSTRUMENT STATE MSSG HELP CONFIG HOLD PRINT ADRS SAVE DATA FUNCTIONS pata INCR Ea RAL Ls L EJ e z Np a GHz S14 5 Le E CURSOR CONTROL 1 2 3 BY EA PUSH TO SELECT coca fame ES E MIC ACC VOLUME SQUELCH AUDIO OUT AUDIO IN a O POWER OFF ON T vue GUN novaa 0 Return Loss Bridge or Directi
73. On Off Status Sym NN Freq Time Time Idle Hz Hz Arm Meas Mode 953 1 1226 9 62 4 67 2 Single Cont a Standard Gate Time AF Anl In To Screen FM Demod DTMF Tone Pair um 72 FM Transmitters To Measure deviation of the DTMF on the Test Set 15 Press the TX key Tone deviation is displayed as FM Deviation TX TEST ae EM Deviation Tone Deviation 145 890058 0 980 TX Power 0 587 0 10354 Tone Frequency J If decoding a sequence of DTMF tones proceed as follows a Set Gate Time to a value long enough to capture the entire sequence typically 1 to 5 seconds b Set Arm Meas to Single Set Arm Meas status message will change to ARMED On the Radio d Key the Transmitter e Send DTMF sequence The symbols and tone pair frequencies will be displayed on the Test Set as shown SIGNALING DECODER Lo Tone Hi Tone On Off Status Sym REA Freq Time Time Idle on ice com 770 13412 1099 109 8 SMMC or 770 8 1340 0 107 6 111 2 770 9 1340 4 108 3 112 8 Standard 770 4 12246 106 0 116 4 ES RIO 770 6 13406 1027 1123 770 8 1224 7 107 7 111 7 770 6 1340 7 106 6 NNA To Screen AF Anl In FM Demod Input Level DTMF Tone a Sequence 73 FM Transmitters FM Audio Distortion Measurement Description This procedure is used to measure an FM Transmitter s audio frequency harmonic distortion level FM reference is ANSI EIA RS 152 C RS 316 B 3 Kn
74. PENE Ant cre Using the Tracking Generator Return Loss Bridge 21 Connect the Return Loss Bridge as shown MIC ACC VOLUME SQUELCH AUDIO OUT 6 59896 RF IN OUT DUPLEX OUT ANTIN Source Return Loss Bridge Reflected 22 From the Controls select Main 23 Select Auxiliary from the Choices field 24 From Normalize select A Only 25 From Normalize select Save B 26 From Normalize select A B 27 From Controls select Auxiliary 28 Select Main from the Choices field Pass Cavity and 50 Q Load 29 Connect the Pass Cavity and 50Q Load as show U MIC ACC VOLUME SQUELCH AUDIO OU 65266 RF IN OUT DUPLEX OUT ANT IN Input Pass Cav ity 50 Q Load Load Return Loss Bridge Output 225 Using the Tracking Generator Measure Adjust Return Loss as follows 30 Measure and record return loss 31 Reverse the Pass Cavity output and input as shown ae m MIC ACC VOLUME SQUELCH AUDIO OUT AUDIO IN RF IN OUT DUPLEX OUT ANTIN D Ge o99 S g t Output P 50 Q Load poca ity Load Input 32 Measure and record return loss 33 Repeat step while adjusting the Pass Cavity coupling loops for maximum but balanced return loss in both directions RETURN LOSS Normalized EHCUOLDEF
75. Panel Features on page 40 28 Connectors on page 40 Key and Fuse Holders on page 41 The Test Set s Features The Test s Sets Front Panel Features SCREEN CONTROL INSTRUMENT STATE g DATA FUNCTIONS 7 DATA A La Ls L m9 rcd z m EE dB S LalLs Le i C n oe Ecc ojl JU E cance one E H A d MIC ACC VOLUME SQUELCH AUDIO OUT AUDIO IN RF IN OUT DUPLEX OUT ANTIN l HI Screens The CRT displays the various test screens measurement results waveforms and messages The a brief description is provided in the following e Screens that are Standard to the Test Set on page 30 e Screens that Require an Option on page 31 e Screens that Require an Optional Instrument on page 31 29 The Test Set s Features 30 Screens that are Standard to the Test Set RX Test receiver test screen with RF and audio output controls and receiver measurement results TX Test transmitter test screen with RF and audio input output controls and transmitter measurement results Duplex Test transmitter and receiver simultaneous test screen with RF and audio input output controls and transmitter and receiver measurement results Tests access to creation editing copying and execution of automated
76. RD ORDER ORDER FUNDAMENTALS ORDER SPECTRUM ANALYZER BW 3 kHz Marker rea 146 52500 Lvl BED 1 14 Controls Harr FF In fint 203 Using the Spectrum Analyzer NOTE 204 To Demodulate the Product These steps are used to help determine which transmitter is causing the distortion 12 Position the marker on the desired carrier 13 Select Marker To to Center Freq 14 From the Controls select Marker 15 Select Main from the Choices field 16 Decrease the Span to 7 5 MHz or less 17 Adjust the Volume and Squelch controls to listen to the demodulated product On the TX TEST screen change the IF Filter to 230 kHz and or AF Anl In if necessary e g to AM for aircraft Using the Tracking Generator Using the Tracking Generator The Optional Tracking Generator allows for quick and accurate characterization of filters duplexers combiners and RF to IF conversions Broadband RF devices can be characterized with single sweeps due to the full span sweep capability to 1 GHz The tracking generator also includes amplitude and frequency offset Output from the Tracking Generator are provided at either the front panel RF IN OUT or DUPLEX OUT connector 205 Using the Tracking Generator Basic Measurements with the Tracking Generator This procedure is provided as an overview of the optional Spectrum Analyzer Tracking Generator s operation The screen choices and displayed parameters are describe
77. RF present at the Test Set RF IN OUT connector must not exceed 60W continuous or 100 Watts for 10 sec minute or permanent instrument damage may result On the Test Set 2 Press the PRESET key 3 Press the TX key On the Radio 4 Key the Transmitter and keep keyed until the remaining steps are complet ed On the Test Set using the knob and data entry keys 5 Set AFGen1 Lvl so that displayed FM deviation is 50 of the Transmit ter s specified maximum frequency deviation typically 2 5 kHz 6 Set AFGen1 Lvl units to dBm 7 Increase more positive AFGenl Lvl by 76 dB 8 Select SPEC ANL 9 Set Span to 7 7 MHz 10 Set Ref Level to place the carrier peak at the top graticule line 77 FM Transmitters To set Ref Level From the Marker screen select Marker To Peak Select Marker To Ref Level 11 Tune Center Freq in MHz steps anywhere from 400 kHz to 1 GHz in search of harmonics sub harmonics multiples or spurious emissions NOTE If spurious emissions are suspect un key the Transmitter and verify that emissions are from the transmitter and not another source To measure spurious emission of the transmitter under test Place at center frequency e Or perform the following a Select Main from the Controls field b Select Markers from the Choices field c Position the marker on the desired peak Position or Next Peak Marker frequency and level are displayed as shown SPECTRUM ANALYZER Spurio
78. Receiver s Controls as follows 9 Setpower to ON 10 If required set frequency to the same value as step 4 11 Set RF Gain to maximum if equipped 12 Set coded squelch feature to minimum if equipped 13 Set the volume control until the AC Level reads 100 of the Receiver s specified audio output Refer to the audio output specifications for the receiver being tested 109 FM Receivers 110 On the Test Set using the knob and data entry keys 14 Change SINAD meter to read Distortion Distortion is displayed as shown RX TEST AC Level 17 18 Ref Distortion RF Gen Freq AFGen1 Freq AFGen2 Freq Filter 1 To Screen 145 280000 1 0000 1 0000 50Hz HPF MHz Hz Hz Amplitude AFGen1 To AFGen2 To Filter 2 mere umm FM m 15kHz HPF m Atten Hold On Off Ext Load R 15 Select AC Level 16 Press the REF SET key 17 Decrease the Receiver s volume control until the Test Set s AC Level meter reads 17 dB Distortion displayed as shown above FM Receivers FM Spurious Response Attenuation Measurement Description This procedure is used to measure an FM Receiver s spurious response attenuation the receiver s ability to prevent unwanted signals from causing response in the audio output A reference is established and high level modulated signals from 1 MHz to 1000 MHz or as required are input to the Receiver while audio output response is measured FM reference is ANSI E
79. Resolution Dynamic Offset Bandwidth Range 12 5 kHz 8 5 kHz 65 dBc 20 kHz 14 kHz 68 dBc 25 kHz 16 kHz 68 dBc 30 kHz 16 kHz 68 dBc 60 kHz 30 kHz 65 dBc Relative Accuracy 2 0 dB 302 Table 9 Spectrum Analyzer Specifications Option 102 Absolute Level Measurements Level Results of absolute power in Watts or dBm are met by adding the ACP ratio from the spectrum analyzer to the carrier power from the in put section RF power detector Level Range Antenna Not applicable RF Input 1 mW 0 dBm to 60 W 47 8 dBm continuous or up to 100 W 50 dBm for 10 seconds minute Dynamic Range Typical values for channel offsets Channel Resolution Dynamic Offset Bandwidth Range 12 5 kHz 8 5 kHz 65 dBc 20 kHz 14 kHz 68 dBc 25 kHz 16 kHz 68 dBc 30 kHz 16 kHz 68 dBc 60 kHz 30 kHz 65 dBc Absolute Accuracy RF power measurement accuracy for absolute in channel power for inputs gt 200 mW 10 of reading 1 mW in dB plus ACP relative accuracy of 2 0 dB 303 Signaling Option 004 Signaling Option 004 304 Capability for generating and analyzing the following formats CDCSS DTMF 1 TONE 2 TONE 5 6 TONE SEQUENTIAL RPCI POCSAG EIA CCITT CCIR ZVEI DZVEI GOLAY EEA AMPS EAMPS NAMPS TACS ETACS JTACS NTACS NMT 450 NMT 900 LTR EDACS MPT 1327 and TDMA dual mode LTR is a registered trademark of th
80. Se poa cA US o Select Card from the Location field Select CABLE FLT from the Procedure field Select Edit Parm from the Test Function field Set cable length units to feet 0 000000 or meters 1 000000 Enter cable type Enter length of cable under test in feet or meters Set this value to approximately 1 5 times the estimated maximum length 219 Using the Tracking Generator 10 Press the PREV key to return to the TEST Main Screen 11 Select Run Test 12 When prompted connect the equipment as shown on the screen then select Continue TESTS IBRSIC Controller FRULT LOCRTOR SETUP DIRGRRM 8920 DUPLEX ANT Cable under test 220 Using the Tracking Generator 13 Follow the displayed instructions to connect and remove the 50 Q Termination at the Power Divider cable test port Remember to select Continue after each step After the test has completed test results are displayed on the screen in a table form or plotted in graphical form SUSPECT FAULTS TEYTS 7520 END LOOP IBRSIC Controller Te 2a at at at at at at SPEC AHL ENCODER DECODER FACIO IHT PEAKS ARE SUSPECT FAULT LENGTHS 7520 END LpoP TESTS IBASIC Controller l R e l M i s m a t c h DO pP I 25 0 75 100 5 Distance ft 221 Using the Tracking Generator Passive Cavity Insertion and Return Loss Measurement This procedure is used to measure the insertion loss and return loss of
81. UT 500 COXIAL SHEILDED ADUIO CABLE ANTENNA MICROPHONE RF OUT AUDIO INPUT 122 AM Transmitters The typical error for the standard Test Set timebase is 2 3 Hz per 1 MHz when measuring carrier frequency If greater accuracy is required use a Test with Option 001 High Stability Timebase Test Set Options Required Special Test Considerations Cable and Adapter Loss on page 46 Measurement Procedure 1 Connect the Transmitter Under Test as shown CAUTION The RF present at the Test Set RF IN OUT connector must not exceed 60W continuous or 100 Watts for 10 sec minute On the Test Set 2 Press the PRESET key 3 Press the TX key Using the knob and data entry keys 4 Set AF Anl In to AM Demod 5 Set AFGen1 Lvl to the correct output level for the desired frequency deviation refer to microphone sensitivity and deviation specifications for the Transmitter being tested 6 Set Filter 1 to 300 Hz HPF 7 Set Filter 2 to 3 kHz LPF 8 Set De Emphasis to Off NOTE If the Test Set is equipped with the CCITT filter option set Filter 1 to 20 Hz HPF and Filter 2 to CCITT 123 AM Transmitters 9 Determine if actual frequency readout or frequency error is the desired measurement O For actual frequency readout continue with step 10 O For frequency error Set Tune Mode to Manual Set Tune Freq to the expected carrier frequency On the Radio 10
82. WARRANTY IS EXPRESSED OR IMPLIED HP SPE CIFICALLY DISCLAIMS THE IMPLIED WARRANTIES OF MER CHANTABILITY AND FITNESS FOR A PARTIDCULAR PURPOSE THE REMEDIES PROVIDED HEREIN ARE BUYER S SOLE AND EXCLUSIVE REMEDIES HP SHALL NOT BE LIABLE FOR ANY DIRECT INDIRECT SPECIAL INCIDENTAL OR CONSEQUEN TIAL DAMAGES WHETHER BASE ON CONTRACT TORT OR ANY OTHER LEGAL THEORY Product maintenance agreements and other customer assistance agree ments are available for Hewlett Packard products For any assistance contact your nearest Hewlett Packard Sales and Service Office DECLARATION OF CONFORMITY Manufacturer s Name Hewlett Packard Company Manufacturer s Address Spokane Division 24001 E Mission Ave Liberty Lake WA 99019 9599 Declares that the product s Product Name RF Communications Test Set Model Number s HP 8920A 8920B Product Options All Conforms to the following product specifications Safety HD 401 IEC 348 EMC EN 55011 1991 CISPR 11 1990 Class A EMC EN 50082 1 1992 IEC 801 2 1991 kv AD IEC 801 3 1991 IEC 801 4 1991 Lines nal Lines Supplementary Information Group 1 4 kV CD 8 3 V m 1k V Power 0 5 KV Sig The product herewith complies with the requirements of the Low Volt age Directive 73 23 EEC and EMC Directive 89 336 EEC Spokane Washington 9 193 if LKL Date Vince Roland SKD Quality Man ager European Contact Your local Hewlett Packard Sal
83. al Test Considerations See Receiver Test Loads on page 46 Measurement Procedure 1 y o O Aae On Connect the Receiver as shown On the Test Set Press the PRESET key Press the RX key Using the knob and data entry keys Set RF Gen Freq to the receiver operating frequency Set Amplitude to 47 dBm 1 mV Set Output Port to Dupl Set AFGen1 To AM at the desired modulation depth typically 30 Set Ext Load R to the test load resistance Set AC Level meter to measure Watts the Radio set the Receiver s Controls as follows 10 11 12 13 14 15 16 144 Set power to ON If required set frequency to same value as step 4 Set squelch to minimum Set RF Gain to maximum if equipped Set the volume control until the AC Level reads 100 of the Receiver s specified audio output Refer to the audio output specifications for the receiver being tested On the Test Set using the knob and data entry keys Select AC Level Press the REF SET key AM Receivers 17 Decrease the receiver s volume control until the AC Level meter reads 13 dB 18 Select AC Level 19 Press the REF SET key 20 Change SINAD meter to read Distortion 21 Tune Amplitude over the range of 500 mV to 5 V Distortion for given input is displayed as shown should not exceed 10 Relative output level for given input is displayed as AC Level should not exceed 10 dB RX TEST
84. alibration measurements are traceable to the United States National Institute of Standards and Technology to the ex tent allowed by the Institute s calibration facility and to the calibration facilities of other International Standards Organization members This Hewlett Packard instrument product in warranted against defects in material and workmanship for a period of one year from date of ship ment During the warranty period Hewlett Packard Company will at its option either repair or replace products which prove to be defective For warranty service or repair this product must be returned to a service facility designated by HP Buyer shall prepay shipping charges to HP and HP shall pay shipping charges duties and taxes for products re turned to HP from another country HP warrants that its software and Firmware designated by HP for use with an instrument will execute its programming instructions when properly installed on that instrument HP does not warrant that the oper ation of the instrument or software or firmware will be uninterrupted or error free LIMITATION OF WARRANTY EXCLUSIVE REMEDIES ASSISTANCE The foregoing warranty shall not apply to defects resulting from im proper or inadequate maintenance by Buyer Buyer supplied software or interfacing unauthorized modification or misuse operation outside of the environmental specifications for the product or improper site prep aration or maintenance NO OTHER
85. an mix with the second harmonics generated 2F1 and 2F2 and create higher order inter modulation distortion products Because these distortion products are usually Fundamental A Third Order Product Fifth Order Product 3F 2F 2F F F F 2F F 3F 2F located close to the original signals at 2F2 F1 and 2F1 F2 span should be reduced to as narrow as possible while still allowing the distortion products to be displayed 201 Using the Spectrum Analyzer CAUTION 202 Measurement Procedure 1 Connect the Antenna to the ANT IN connector Do not exceed the connector s rated input or permanent instrument damage may result On the Test Set 2 Press the PRESET key Using the knob and data entry keys 3 Select the SPEC ANL screen 4 From the Controls select Ant 5 Set Center Freq and Span fields to view desired frequency range 6 Set Ref Level from 30 dBm to 50 dBm as required to view the desired signal On the Radio 7 Key the Transmitters and keep it keyed until the remaining steps are completed if applicable Using the Spectrum Analyzer Determine Distortion Products 8 Record the frequency and level of all signals of interest If further analysis is desired On the SPECTRUM ANALYZER screen 9 From the Controls select Main 10 Select Marker from the Choices field 11 Use the Marker To to select the desired carrier Frequency and level are displayed as shown 5TH 3RD 3
86. ansmitter Receiver RF INPUT 509 COXIAL Duplexer Duplexer CABLE Using the Tracking Generator Additional Equipment Required Test Load Special Test Considerations See Receiver Test Loads on page 46 See Coaxial Cable on page 46 Measurement Procedure 1 Connect the Repeater as shown ALTERNATE If your repeater does not employ a duplexer as shown in the connection dia CONNECTIONS gram connect the Test Set DUPLEX OUTPUT port to the Repeaters RF IN PUT port and the Test Set RF IN OUT port to the Repeaters RF OUTPUT port On the Test Set 2 3 Press the PRESET key Press the DUPLEX key Using the knob and data entry keys 4 5 6 7 Set Tune Freq to the transmitter operating frequency Set RF Gen Freq to the receiver operating frequency Set Amplitude to 47 dBm 1 mV Set AFGen1 To 60 of the Receiver s specified maximum frequency deviation typically 3 kHz Set AC Level meter to measure Watts NOTE If the test load resistance is not 8 Q select the AF ANL screen and change Ext Load R to the correct test load resistance 229 Using the Tracking Generator 230 On the Repeater set the Receiver s Controls as follows 9 10 11 12 13 14 15 16 Set power to ON If required disable the COR Carrier Operated Relay or equivalent device that keys the transmitter when a signal is present at the receiver If required s
87. ation e A brief measurement overview and a reference to applicable TIA EIA spec ifications for each test e A list of the Test Set options and additional test equipment required to per form the procedure e Any special test considerations that need to be considered for safety mea surement accuracy etc e Step by step procedures required to perform each measurement with illus trations Refer to Configuring for Measurements on page 243 or the Test Set s User Guide on preparing the Test Set for operation 160 List of Tests List of Tests SSB Transmitter Measurements SSB Frequency or Frequency Error Measurement on page 163 SSB Rated Output Power Carrier Suppression Measurement on page 166 SSB Harmonics and Spurious Output Measurement on page 170 SSB Receiver Measurements SSB Audio Output Power and Distortion Measurement on page 174 SSB Sensitivity Measurement on page 178 SSB Squelch Sensitivity Measurement on page 182 161 SSB Transmitters SSB Transmitters The following measurements are provided for testing SSB Transmit ters The procedures are arranged in the order that tests are typically performed 162 SSB Transmitters SSB Frequency or Frequency Error Measurement This procedure is used to measure a SSB Transmitter s frequency or frequency error into 50 Q The transmitted signal frequency is measured then dependent on the side band upper or lower used the actual fre
88. ce parameters These characteristics are shown in italics and are sometimes labeled typical usable to or nominal 284 Signal Generator Specifications Signal Generator Specifications RF Frequency Range 250 kHz to 1 GHz Accuracy and Stability Same as reference oscillator 0 015 Hz Switching Speed lt 150 ms to within 100 Hz of carrier frequency Resolution 1 Hz 285 Signal Generator Specifications Output RF IN OUT Connector Standard Level Range 137 to 19 dBm into 500 Level Accuracy 1 2 dB level gt 127 dBm typical 1 0 dB for all levels Reverse Power 60 W continuous 100 W for 10 seconds minute Option 007 Level Range 137 to 5 dBm into 50 Q Reverse Power 2 4 W continuous 4 0 W for 10 seconds minute DUPLEX OUT Connector Level Range 127 to 7 dBm into 50 Q Level Accuracy 1 0 dB Reverse Power 200 mW maximum SWR RF IN OUT lt 1 5 1 DUPLEX OUT lt 2 0 1 level lt 4 dBm Resolution 0 1 dB 286 Signal Generator Specifications Spectral Purity Spurious Signals For lt 1 dBm output level at DUPLEX OUT or lt 25 dBm output level at RF IN OUT Harmonics lt 30 dBc Non Harmonic Spurious lt 60 dBc at gt 5 kHz offset from carrier Residual FM rms CCITT lt 7 Hz for 250 kHz lt f lt 249 MHz 4 Hz for 249 MHz f lt 501 MHz lt 7 Hz for 501 MHz lt f lt 1000 MHz SSB Phase Noise gt 20 kHz Offset 1 GHz car
89. cord the frequency as Low Freq for use later in the procedure Calculate the measurement 19 High Freq Assigned Freq and Assigned Freq Low Freq The minimum usable bandwidth is the smaller result FM Receivers FM 20 dB Quieting Sensitivity Measurement Description This procedure is used to measure an FM Receiver s quieting sensitivity 20 dB reduction in noise A reference is established with no signal at the Receiver s antenna then an un modulated carrier is applied and the RF amplitude is increased until a 20 dB reduction in noise is measured at the audio output 3 Knob Data Entry 2 Keys SCREEN CONTROL INSTRUMENT STATE ED QUSERD DATA FUNCTIONS By D TA U D gam ES Ss 7 s lo 9 f rx SS al s Le ES CURSOR CONTROL MHz Cj 1 2 3 E kHz Paes oji LA Lx YES NO n ms m cancer e exor rp Eal z MIC ACC VOLUME SQUELCH AUDIO OUT RF IN OUT 500 COXIAL SPEAKER CABLE AUDIO INPUT ANTENNA RF INPUT lt 91 FM Receivers Additional Equipment Test Load Required Special Test Considerations See Receiver Test Loads on page 46 92 Measurement Procedure 1 w o N A Un Connect the Receiver as shown On the
90. ctive Sensitivity Measurement on page 228 189 Using the Spectrum Analyzer Using the Spectrum Analyzer 190 The Spectrum Analyzer can be used to measure signals from 400 kHz to 1 GHz with variable spans from 5 kHz to 1 GHz full span A tunable marker is provided for automatic readout of frequency and amplitude or relative frequency and amplitude from a reference Other marker functions include marker to peak marker to next peak marker to center frequency and marker to reference level all of which speed up and simplify signal searching and measurement Inputs to the Spectrum Analyzer are connected to either the front panel RF IN OUT or ANT IN connector can range from 60W RF IN OUT to 2 uV ANT IN All the Spectrum Analyzer functions are accessed from one of three screens Main Screen main sweep controls e Marker Screen marker positioning controls e Auxiliary Screen input attenuation sensitivity and trace controls Using the Spectrum Analyzer Measuring Transmitter High Low Power Signals This procedure is provided as an overview of the optional Spectrum Analyzer s operation The screen choices and displayed parameters are described and illustrated Knob Data Entry 2 Keys C SCREEN CONTROL INSTRUMENT STATE MSSG HELP doNEG HOLD PRINT apes save FUNCTIONS pata METER AVG
91. d Special Test Considerations See Receiver Test Loads on page 46 Measurement Procedure 1 Connect the Receiver as shown On the Test Set 2 Press the PRESET key 3 Press the RX key Using the knob and data entry keys 4 Set RF Gen Freq to the receiver operating frequency 5 Set Amplitude to 47 dBm 1 mV 6 Set AFGenl To AM at desired modulation depth typically 30 7 SetFilter 1 to 20 Hz HPF 8 Set Ext Load R to the test load resistance 9 Set AC Level meter to measure Watts On the Radio set the Receiver s Controls as follows 10 Set power to ON 11 If required set frequency to the same value as step 4 12 Set RF Gain to maximum if equipped 13 Set squelch control to minimum if equipped 14 Set the volume control until the AC Level reads 50 of the Receiver s specified audio output Refer to the audio output specifications for the receiver being tested 150 NOTE AM Receivers On the Test Set using the knob and data entry keys 15 Select AC Level 16 Press the REF SET key 17 Change AFGen1 Freq from 300 Hz to 3 kHz while observing AC Level Meter Frequency Response is displayed on the screen as AC Level in relative dB from 300Hz to 3 kHz as shown The audio response should not vary more than 2 to 14 dB Receiver s with loudspeakers or 1 to 8 dB Receivers with headphones or feed a line from a standard 6 dB per octave de emphasis cur
92. d and illustrated Knob Data Entry 2 Keys RD DATA FUNCTIONS DATA Az C8 Lo m m ms F a A Ee 3 MIC ACC VOLUME SQUELCH AUDIO OUT AUDIO IN RF IN OUT DUPLEX OUT 5566 soa 4 4 206 Using the Tracking Generator Test Set Options Required Spectrum Analyzer Tracking Generator option 102 CAUTION Measurement Procedure 1 Connect the signal input to the RF IN OUT or DUPLEX OUT connector Do not exceed the connector s rated input or permanent instrument damage may result On the Test Set 2 Press the PRESET key Using the knob and data entry keys 3 Select SPEC ANL screen From the Controls field select Main 4 5 6 Select RF Gen from the Choices field Continue the measurement by selecting one of the following Controls field choices and referring to the following e Fora swept RF output at the offset and amplitude at the specified RF output port see Measurements Using the Track Control Fields on page 208 Fora Inverted sweep mode which is useful when testing super hetrodyned receivers where sweeping the RF upward sweeps the IF downward see Measurements Using the Fixed Control Fields on page 209 207 Using the Tracking Generator
93. d this level Calculate the reading 20 Maximum Squelch Hysteresis is the difference between the two readings FM Receivers FM CTCSS Sensitivity and Bandwidth Measurement Description This procedure is used to measure an FM Receiver s Continuous Tone Coded Squelch System CTCSS sensitivity and bandwidth For sensitivity the minimum signal input at the Receiver s antenna modulated with tone that opens the squelch is measured and displayed Squelch hysteresis is also measured and calculated Tone frequency is then increased and decreased until the squelch boundaries are determined and the Bandwidth is calculated Reference is ANSI EIA RS 220A 3 Knob Data Entry 2 Keys SCREEN CONTROL C INSTRUMENTSTATE Y msio HELP T HOLD PRINT ADRS SAVE AUSER DATA HUNCTIONS D TA CR NCR xiq IE Er 7 s 9 D we t E 4 5 6 dim CURSOR CONTROLE ASSIGN 1 2 3 E Ncc ur gt 4x YES NO a ms m cance e onom m LES pem MIC ACC VOLUME SQUELCH AUDIO OUT AUDIO IN RF IN OUT Last gh 500 COXIAL SPEAKER CABLE AUDIO INPUT ANTENNA RF INPUT 97 FM Receivers Required Additional Equipment Test Load Special Test Considerations See Receiver Test Loads on page 46
94. div 2 dB div or 1 dB div Display Range 80 dB Reference Level Range 50 to 50 dBm Residual Responses lt 70 dBm no input signal 0 dB attenuation Image Rejection gt 50 dB Non harmonic Spurious Responses gt 70 dB for input signals lt 30 dBm Level Accuracy 2 5 dB Displayed Average Noise Level lt 114 dBm for 50 kHz spans Log Scale Linearity 2 dB for input levels 30 dBm or 60 dB range 272 Spectrum Analyzer Specifications Option 102 Tracking Generator Included with Option 102 Frequency Range 400 kHz to 1 GHz Frequency Offset Frequency span endpoints frequency offset cannot be 400 KHz or 2 1 GHz Output Level Range Same as signal generator Sweep Modes Normal and inverted 273 Spectrum Analyzer Specifications Option 102 Adjacent Channel Power Included with Option 102 Table 5 274 Relative Measurements Level Range Antenna In 40 dBm to 20 dBm RF Input 0 16 mW 8 dBm to 60 W 47 8 dBm continuous or up to 100 mW 50 dBm for 10 seconds minute Dynamic Range Typical values for channel offsets Channel Resolution Dynamic Offset Bandwidth Range 12 5 kHz 8 5 kHz 65 dBc 20 kHz 14 kHz 68 dBc 25 kHz 16 kHz 68 dBc 30 kHz 16 kHz 68 dBc 60 kHz 30 kHz 65 dBc Relative Accuracy 2 0 dB Absolute Level Measurements Level Results of absolute power in Watts or dBm are met by adding the ACP ratio from
95. e 34 98 dBuV 7 4 dB m 42 38 dBuV m CJ If Antenna Factor is not known calculate using Antenna Gain as fol lows Antenna Factor 50Q 20 log freq MHz Gain db 29 8dB Antenna Factor 75Q 20 log freq MHz Gain db 31 5dB For example Ant Factor 20 log 144 68 6db 29 8 dB 7 4 dB m CJ Convert Field Strength from dBuV m to uV m as follows Field Strength in AV m 10 Field Strength in dBuV m 20 For example 10 42 38 dBu V m 20 131 52 uV m 199 Using the Spectrum Analyzer Analyzing External Transmitter Inter modulation Distortion This procedures used to display measure and demodulate high order inter modulation distortion products using the Spectrum Analyzer Tracking Generator option Knob Data Entry 2 1 SCREEN CONTROL INSTRUMENT STATE MSSG HELP ONFIG HOLD PRINT ADRS SAVE DATA PUSH TO SELECT cancer e MIC ACC VOLUME SQUELCH AUDIO OUT e 9909 RF IN OUT DUPLEX OUT ANT IN 200 Using the Spectrum Analyzer Test Set Options Required Spectrum Analyzer Tracking Generator option 102 Additional Equipment Whip Antenna Required NOTE When two signals F1 and F2 are present in a system they c
96. e E F Johnson Company EDACS is a trademark of Ericsson GE over 15 to 35 C for analyzing A General Purpose Function Generator with the following waveforms is included sine square triangle ramp dc Gaussian white noise uniform white noise Frequency Range and Level Same as audio source DC Current Meter DC Current Meter Measurement Range 0 to 10 A usable to 20 A Accuracy The greater of 10 of reading after zeroing or 30 mA levels gt 100 mA 305 Remote Programming Remote Programming HP IB Hewlett Packard s implementation of IEEE Standard 488 2 Functions Implemented SH1 AH1 T6 L4 SR1 RL1 LEO TEO PPO DC1 DTI C4 C11 E2 RS 232 Six wire RJ 11 connector provides two three wire serial ports for serial data in and out no hardware handshake capability Baud Rates 150 300 600 1200 2400 4800 9600 and 19200 Hz Parallel Centronics connector A standard 25 pin sub min D female connector with right angle adapter is included 306 Memory Card Specifications Memory Card Specifications Card Compatibility Single industry standard PCMCIA slot accepts Type I or Type II SRAM and ROM memory cards Storage Capability Allows for the storage and retrieval of IBASIC program parameter and results data input of new calibration data and long term storage of Store Recall information Firmware Upgrades Accepts PCMCIA flash memory cards 4 Mbytes to allow automatic loadi
97. e Specifications These specifications apply to both internal sources Frequency Range dc to 25 kHz Accuracy 0 025 of setting Resolution 0 1 Hz Output Level Range 0 1 mV to 4 Vrms Maximum Output Current 20 mA peak Output Impedance lt 1Q 1 kHz Accuracy 2 of setting plus resolution Residual Distortion 0 125 for tones 20 Hz to 25 kHz in an 80 kHz BW THD plus noise amplitude gt 200 mVrms Resolution Level 0 01 V 50 uV Level 0 1 V 5 mV Level lt I V 5 mV Level 10 V 50 mV Offset in DC Coupled Mode 50 mV 261 RF Analyzer Specifications RF Analyzer Specifications RF Power Measurement 262 Standard Frequency Range 400 kHz to 1 GHz Measurement Range mW to 60 W continuous 100 W for 10 seconds minute measured at RF IN OUT connector Accuracy 10 of reading 1 mW SWR 1 5 1 Resolution Power 10 W 1 mW Power 210 W 10 mW Option 007 Frequency Range 400 kHz to 1 GHz Measurement Range 40uW to 2 4 W continuous 4 0 W for 10 seconds minute Accuracy 10 of reading 40 yW SWR lt 1 5 1 Resolution P lt 400 mW 40 uW P 2 400 mW 400uW Option 008 Frequency Range 400 kHz to 1 GHz Measurement Range 0 1 mW to 6 W continuous 10 W for 10 seconds minute Accuracy 10 of reading 0 1 mW SWR lt 1 5 1 Resolution P 1W 0 1 mW P21W 1 0mW RF Analyzer Specifications RF Frequency Measurement Measurement Range 400 kHz to 1 GHz Level Range
98. e Test Set This chapter provides the user with a general introduction to the instrument Information provided includes a general description of the Test Set and a general description of the front and rear panel features 23 Conventions Used In This Manual Conventions Used In This Manual 24 The Test Set keys screen titles fields and shifted functions are shown using the following conventions Refer to the RX TEST screen and the instrument front panel Screen titles are shown in bold upper case type RX TEST Field names and some measurements such as AC Level are indicated in lowercase bold type RF Gen Freq The contents of a field and some measurements such as SINAD are shown in italics 00 000000 or underlined RF In Key caps are shown in all capital letters PRESET The SHIFT key is pressed and released to access the blue labeled functions printed above the keys When a SHIFTed function is called out in this man ual the use of the SHIFT key is assumed and is not usually indicated The function to be accessed is shown in boxed italics text upper case letters MSSG Product Description Product Description The Test Set is a single instrument that combines the features of 22 individual radio test instruments The Test Set is designed to meet the communication test needs of both service and manufacturing environments and the capability to test land mobile radios cellular phones and various o
99. e connecting the antenna to the Test Set should be factored in depending on cable length and or operating frequency CAUTION Measurement Procedure 1 Connect the Antenna to the ANT IN connector Do not exceed the connector s rated input or permanent instrument damage may result On the Test Set 2 Press the PRESET key Using the knob and data entry keys 3 Select the SPEC ANL screen 4 From the Controls select Ant 5 Select Lvl to measure in units of dBuV 6 Set Ref Level from 30 dBm to 50 dBm as required to view the desired signal On the Radio 7 Key Transmitter that drives the antenna being tested and keep it keyed until the remaining steps are completed if applicable On the Test using the knob and data entry keys 8 Set Ref Level as required to view the desired signal 9 From Controls select Main 10 Select Marker from the Choices field 11 Select Marker To to select the desired signal peak 197 Using the Spectrum Analyzer Antenna 12 Rotate the Calibrated Antenna on each axis until the maximum input signal strength is achieved Record the signal level in dBuV as shown SIGNAL LEVEL ANALYZER Bus 3 kHz jarker SPEC EHCODEF DECODER Controls FADIG INT Moin FF In Arnt Hz 198 Using the Spectrum Analyzer Calculate the Field Strength 13 Calculate Field Strength as follows Field Strength in dBuV Signal Level step 7 Antenna Factor For exampl
100. e instrument or disconnection of the protective earth terminal will cause a potential shock hazard that could result in personal injury Grounding one connector of a two conductor outlet is not sufficient protection Whenever it likely that the protection has been impaired the instrument must be made inoperative and be secured against any unintended operation If this instrument is to be energized via an auto transformer for voltage reduction make sure the common terminal is connected to the earth terminal of the power source Servicing instructions are for use by service trained personnel only To avoid dangerous electric shock do not perform any servicing unless qualified to do so Adjustments described in the manual are performed with power supplied to the instrument while protective covers are removed Energy available at many points may if contacted result in personal injury Capacitors inside the instrument may still be charged even if the instrument has been disconnected from its source of supply For Continued protection against fire hazard replace the line fuse s only with 250 V fuse s or the same current rating and type for example normal blow or time delay Do not use repaired fuses or short circuited fuseholders CERTIFICATION WARRANTY Hewlett Packard Company certifies that this product met its published specifications at the time of shipment from the factory Hewlett Packard further certifies that its c
101. easurement Description This procedure is used to measure an FM Receiver s sensitivity for 12dB SINAD center frequency and modulation acceptance bandwidth All measurements are read from the Test Set screen Reference is RS 204D 3 Knob Data Entry 2 Keys SCREEN CONTROL INSTRUMENT STATE ED QUSERD DATA FUNCTIONS By D TA U D gam ES Ss 7 s lo 9 f SS 4 l sllo E CURSOR CONTROL MHz Cj 1 2 3 E kHz Paes oji LA Lx YES NO n ms m cancer e exor rp Eal z MIC ACC VOLUME SQUELCH AUDIO OUT RF IN OUT 509 COXIAL CABLE SPEAKER AUDIO INPUT ANTENNA RF INPUT lt 83 FM Receivers Additional Equipment Test Load Required Special Test Considerations See Receiver Test Loads on page 46 NOTE 84 Measurement Procedure 1 Connect the Receiver as shown On the Test Set 2 Press the PRESET key 3 Press the RX key Using the knob and data entry keys 4 Set RF Gen Freq to the receiver operating frequency 5 Set Amplitude to 47 dBm 1 mV 6 Set AFGenl To 60 of the Receiver s specified maximum frequency de viation typically 3 kHz 7 Set Ext Load R to the test load resistance 8 Set AC Level meter to measure Watts O
102. el 3 Knob Data Entry 2 Keys E INSTRUMENT STATE zi E 8j oven MIC ACC VOLUME SQUELCH AUDIO OUT AUDIO IN RF IN OUT DUPLEX OUT HI 6 9699 SHEILDED ADUIO CABLE ANTENNA MICROPHONE RF OUT AUDIO INPUT 128 AM Transmitters Measurement Procedure 1 Connect the Transmitter as shown CAUTION The RF present at the Test Set RF IN OUT connector must not exceed 60W continuous or 100 Watts for 10 sec minute or permanent instrument damage may result On the Test Set 2 3 Press the PRESET key Press the TX key Using the knob and data entry keys 4 9e X GM ID NOTE Set AF Anl In to AM Demod Set Filter 1 to 300 Hz HPF Select the AF Freq Meter Select Distn from the Choices field Set AFGen1 Lvl so that displayed AM depth is 80 Do not exceed the specified input level that causes 100 depth or the Transmitter s modulation limiting circuits will cause added distortion Refer to the input level specifications for the Transmitter being tested On the Radio 9 Key the Transmitter and keep keyed until reading displays Distortion in percent or dB is displayed on the Test Set as shown TX TEST TX Frequency AM Depth Depth 28 810176 98 9 TX Power 18 3
103. ency counter e AF power meter e AC DC voltmeter DC current meter HP 8920A option e SINAD meter e Distortion meter e Two variable audio sources e Digital oscilloscope Spectrum analyzer and tracking generator optional e 2uV sensitivity typically 1 uV e Cellular phone test capability optional Built in I BASIC controller e HP IB RS 222 interface buses for remote programming optional e Radio test software optional e Radio interface card HP 8920A option e Adjacent channel power 26 Specifications Product Description Abbreviated specifications for the Test Set are provided in HP 8920A Specifications on page 253 and HP 8920B Specifications on page 283 See the HP 8920A B RF Communications Test Set Assembly Level Repair Guide for a complete list of specifications 27 The Test Set s Features The Test Set s Features This section contains a brief description of the Test Set s keys connectors controls and screens Additional operating information for all keys connectors controls and screens can be found in the Test Set s user guide Feature Contents The Test s Sets Front Panel Features on page 29 Screens on page 29 Data Function Keys on page 33 Knobs on page 34 Screen Control Keys on page 35 Instrument State Keys on page 36 Data Keys on page 37 Connectors on page 38 Non Bracketed Keys and Memory Card Slot on page 39 The Test Set s Rear
104. ent 228 S Screen Control Keys 35 Screen Description 29 Sensitivity Measurement 178 Setting Date 246 Setting Time 246 Shift Functions 23 SINAD Measurement 83 Special Test Considerations 46 Specifications 25 AF analyzer 268 297 audio source 261 291 dc current meter 277 305 description 253 283 general 281 309 HP 8920A 254 284 HP 8920B 281 HP 8921A 309 oscilloscope 271 300 reference oscillator 279 308 remote programming 278 306 RF analyzer 262 292 save recall registers 280 signal generator 255 285 signaling 276 304 spectrum analyzer 272 301 Spectrum Analyzer Spectrum Analyzer 1 4 Wave Coaxial Tuning Swept 214 Analyzing External Transmitter In termodulation Distortion 200 Antenna Return Loss VSWR Mea surement and Tuning 210 Cable Fault Location 218 Field Strength Measurement 196 Passive Cavity Insertion Loss Mea surement 222 Repeater System Effective Sensitivi ty Measurement 228 Using 190 Measurements 187 233 Spurious Output Measurement 76 130 170 317 Index Spurious Response Attenuation Mea surement 111 155 Squelch Sensitivity Measurement 146 182 SSB Audio Output Power Measurement 174 Carrier Suppression Measurement 166 Distortion Measurement 174 Frequency Error Measurement 163 Frequency Measurement 163 Harmonic Output Measurement 170 Rated RF Output Power Measure ment 166 Sensitivity Measurement 178 Spu
105. equency sequence if desired 3 Knob Data Entry 2 Keys INSTRUMENT STATE SAVE pata MIC ACC VOLUME SQUELCH AUDIO OUT AUDIO IN RF IN OUT x 2066 MESI ANTENNA RF OUT FM Transmitters Test Set Options Required Decoder Option Additional Equipment Required None Special Test Considerations None Measurement Procedure 1 Connect the Transmitter as shown CAUTION The RF present at the Test Set RF IN OUT connector must not exceed 60W continuous or 100 Watts for 10 sec minute On the Test Set 2 Press the PRESET key 3 Press the TX key Using the knob and data entry keys Se PFN A Un RR Set Filter 1 to 300 Hz HPF Set Filter 2 to 3 kHz LPF Select the DECODER screen Set Mode to DTMF Set Input Level to 0 95 kHz Set Gate Time to desired value typically 100 ms 10 Set Arm Meas to Cont On the Test Set 11 Adjust Volume control to desired level 12 Adjust Squelch control until just closed 71 FM Transmitters On the Radio 13 Key the Transmitter and keep keyed until the remaining steps are complet ed 14 Press the desired DTMF key The symbol and tone pair frequencies will be displayed on the Test Set as shown SIGNALING DECODER Lo Tone Hi Tone
106. equency Measurement 87 G H 140 Guidelines for Measurements 50 116 Harmonic Measurement 76 130 FM Radio Testing 48 160 188 234 Harmonic Output Measurement 170 FM Receiver Testing 79 173 HP 8920A Description 10 25 FM Transmitter Testing 52 162 HP 8920A Features 26 Frequency Error Measurement 163 HP 8920A Option Requirements 44 Frequency Measurement 163 Frequency Frequency Error Measure ment 56 122 Front Panel 28 Front Panel Connectors 38 Front Panel Controls 28 Fuse 245 315 Index I Installation 244 Intermodulation Distortion 200 316 M Manual Conventions 24 Maunal Contents 24 Maximum Squelch Sensitivity Mea surement 93 145 Measurement Considerations 50 116 160 188 234 Measurement Information 48 Measurements Performing 247 Memory Card Slot 39 Microphone Sensitivity Measurement 62 125 Modulation Acceptance Bandwidth Measurement 83 Modulation Depth Measurement 122 Modulation Limiting Measurement 62 125 o Off The Air Monitoring 119 Oscilloscope Using 235 Output Power Measurement 56 122 Index P Passive Cavity Insertion Loss Measurement 222 Return Loss Measurement 222 Performing Measurements 247 Presets 48 R Rated RF Output Power Measurement 166 Rear Panel Connectors 40 Rear Panel Features 40 Receiver Center Frequency Measure ment 83 Receiver Testing 48 Repeater System Effective Sensitivity Measurem
107. er s AM envelope In order to display the envelope on the Oscilloscope the SSB demodulator is used to down convert the incoming RF signal to an IF frequency of 20 Hz 3 Knob Data Entry 2 Keys SCREEN CONTROL INSTRUMENT STATE E dowriG HOLD PRINT ADRS SAVE DATA FUNCTIONS EA DATA INCR if Low Ir s s o 5 L6 En 2 L3 By kHz 7 El w E 4 ppm ah uw we Lem av MIC ACC VOLUME SQUELCH AUDIO OUT AUDIO IN RF IN OUT DUPLEX OUT ANTIN eines E i A mse SHEILDED ADUIO CABLE ANTENNA MICROPHONE RF OUT AUDIO INPUT 133 AM Transmitters CAUTION 134 Measurement Procedure 1 Connect the Transmitter as shown The RF present at the Test Set RF IN OUT connector must not exceed 60W continuous or 100 Watts for 10 sec minute or permanent instrument damage may result On the Test Set 2 Press the PRESET key 3 Press the TX key On the Radio 4 Key the Transmitter On the Test Set using the knob and data entry keys 5 Set AF Anl In to AM Demod 6 Adjust AFGen1 Lvl until AM Depth is 5096 TX TEST TX Frequency MHz AM Depth 27 064762 78 3 TX Power IAF Freq 4 58 1 00001 AM Depth Tune Mode Input Port AF Anl In AFGen1 Freq To
108. er 7 Oscilloscope Measurements This chapter contains the information about system measurements using the Oscilloscope 10 Chapter 8 Configuring For Measurements This chapter contains the information required to install the Test Set in preparation of performing measurements Information provided includes instructions for power and printer connection and initial power up and configuration Chapter 9 References This chapter lists any manuals application notes specifications and standards referenced in this guide Chapter 10 HP 8920A Specifications This chapter provides abbreviated specifications for the HP 8920A Chapter 11 HP 8920B Specifications This chapter provides abbreviated specifications for the HP 8920B Glossary This information lists the acronyms abbreviations and common terms used in this guide Contents 1 Getting Started With The Test Set Conventions Used In This Manual 24 Product Description 25 The Test Set s Features 28 11 Contents 2 Measurements Considerations Measurement Guideline 1 44 Measurement Guideline 2 45 Measurement Guideline 3 46 Measurement Guideline 4 48 12 Contents 3 Testing FM Radios Introduction 50 List of Tests 51 FM Transmitters 52 FM Receivers 79 13 Contents 4 Testing AM Radios Introduction 116 List of Tests 117 AM Transmitters 118 AM Receivers 136 14 Contents 5 Testing SSB Radios Introduction 160 List of Tests 161 SSB
109. er the entire operating environmental range unless otherwise noted Supplemental Characteristics are intended to provide additional information useful in applying the instrument by giving typical but non warranted performance parameters These characteristics are shown in italics and are sometimes labeled typical usable to or nominal Signal Generator Specifications Signal Generator Specifications RF Frequency Output Range 250 kHz to 1 GHz Accuracy and Stability Same as reference oscillator 0 015 Hz Switching Speed lt 150 ms to within 100 Hz of carrier frequency Resolution 1 Hz RF IN OUT Connector Standard Level Range 137 to 19 dBm into 500 Level Accuracy 1 8 dB level gt 127 dBm typical 1 0 dB for all levels Reverse Power 60 W continuous 100 W for 10 seconds minute Option 007 Level Range 137 to 5 dBm into 500 Reverse Power 2 4 W continuous 4 0 W for 10 seconds minute Option 008 Level Range 137 to 9 dBm into 50 Reverse Power 6 0 W continuous 10 W for 10 seconds minute 255 Signal Generator Specifications DUPLEX OUT Connector Level Range 127 to 7 dBm into 50Q Level Accuracy 1 5 dB typical 1 0 dB for all levels Reverse Power 200 mW maximum SWR RF IN OUT lt 1 5 1 DUPLEX OUT 2 0 1 level 4 dBm Resolution 0 1 dB 256 Spectral Purity Table 2 Table 3 Spurious Signals For lt 1 dBm outpu
110. es and Service Office or Hewlett Packard GmbH Dept ZQ Standards Europe Herrenberger StarBe 130 D 7030 Boblingen Fax 49 7031 14 3143 In this Book This book is a guide for performing common radio tests using the Test Set This guide contains the following chapters and appendices Chapter 1 Getting Started With The Test Set This chapter contains a description of the manual contents a general description of the Test Set and a general description of the front and rear panel controls indicators and connectors Chapter 2 Measurement Considerations This chapter contains a description of guidelines that must be adhere to when performing the measurements with the Test Set Chapter 3 Testing FM Radios This chapter contains the information required to use the Test Set to perform FM Transmitter and Receiver measurements Chapter 4 Testing AM Radios This chapter contains the information required to use the Test Set to perform AM Transmitter and Receiver measurements Chapter 5 Testing SSB Radios This chapter contains the information required to use the Test Set to perform SSB Transmitter and Receiver measurements Chapter 6 Spectrum Analyzer Measurements This chapter contains the information about system measurements using the Spectrum Analyzer and Tracking Generator Chapter 7 Spectrum Analyzer Measurements This chapter contains the information about system measurements using the Spectrum Analyzer and Tracking Generator Chapt
111. ession Measurement Description This procedure is used to measure a SSB Transmitter s rated output power into 50 Q The transmitter is modulated with two separate audio signals at different frequencies The amplitude of each audio signal is adjusted until the transmitted side band signals are equal as displayed on the spectrum analyzer screen Once properly adjusted the RF Output power is measured A reference is then established and the catrier suppression is measured by removing all audio to the microphone input 3 Knob Data Entry 2 Keys SCREEN CONTROL E INSTRUMENT STATE ii donre HoD PRINT Apres save pata FUNCTIONS C DATA NHRRRREREN x ava 7 Ls L9 amp ie f 4 5 6 EE Gi CURSOR CONTROL 1 l 2 3 W oj LA ES E EX e Eo 9 8 EC MIC ACC VOLUME SQUELCH AUDIO OUT AUDIO IN RF IN OUT DUPLEX OUT ANTIN HI LO e oo OG TENNE AS Las 300 COXIAL 1 SSB TRANSMITTER UNDER TEST SHEILDED CABLE AUDIO CABLE ANTENNA MICROPHONE RF OUTPUT AUDIO INPUT 166 SSB Transmitters Test Set Options Required Spectrum Analyzer Tracking Generator option 102 Special Test Considerations Cable and Adapter Loss on page 46 Also the accuracy and stability of both the AF source and the RF
112. et frequency to the same value as step 5 Set squelch to minimum Set RF Gain to maximum if equipped Set coded squelch feature if equipped to OFF Failure to set coded squelch to off will cause the SINAD measurement to be incorrect Slowly increase volume control until the AC Level reads 100 of the Receiver s rated audio output power Refer to audio output specifications for the Receiver being tested as required CJ If desired use the meter averaging function for the SINAD indicator a Select dB on the SINAD meter b Press the AVG key CJ If desired select the number of readings to average Enter the number of readings to average Higher number of readings averaged will require longer to reach the final indication Key the Transmitter by enabling the COR or equivalent Using the Tracking Generator On the Test Set using the knob and data entry keys 17 Increase Amplitude until the SINAD meter again reads 12 dB Effective Sensitivity is displayed as Amplitude Record the level in dBm for use later in the procedure RECEIVE TRANSMIT FREQUENCY FREQUENCY SINAD SENSITIVITY DUPLEX TEST LES 97 T 145 269 Power mum 8 RF Anl In 145 Input Port RE In Ant IF Filter Ext TX key RF Gen Frea Amplitude dBm Rtten Hold utput Port EF Gut Our RFGenl Frea 11 0000 kHz AFGent1 To FM Coupling Audio Out Audio In Filter 1 P 1SkHz LEE Detect
113. f desired verify that the Receiver is tuned to a specific frequency Re ceiver Center Frequency Slowly increase or decrease RF Gen Freq in 100 Hz steps until SINAD meter reads maximum Receiver Center Frequency is displayed as RF Gen Freq as shown above 16 If changed because of the previous steps reset RF Gen Freq to receiver op erating frequency 17 Set Amplitude to a level 6 dB higher more positive than the level record ed in step 5 18 Increase AFGen1 To Deviation until SINAD meter reads 2 dB 85 FM Receivers On the Test Set modulation acceptance bandwidth is displayed as AFGenl To Deviation as shown RX TEST SHE AC Level 0 12 08 0 6 9 50 Avg RF Gen Freq AFGen1 Freq AFGen2 Freq Filter 1 To Screen 146 519000 1 0000 1 0000 50Hz HPF Amplitude AFGen1 To AFGen2 To Filter 2 FM 15kHz HPF ojii Modulation Ext Load R Acceptance Output Port P IRF Out Dupl Bandwidth 86 FM Receivers FM Variation Of Sensitivity With Signal Frequency Measurement Description This procedure is used to measure an FM Receiver s usable bandwidth at 12 dB SINAD A reference is established at 12 dB SINAD then the level is increased by 6 dB Frequency is increased and decreased until the SINAD of 12 dB is again obtained Usable bandwidth is then calculated Reference is ELA 204 D 3 Knob DataEntry 2 Keys SCREEN CONTROL INSTRUMENT STATE ED msio HELP sie HOLD PRINT ADRS S
114. f the input signal is connected to the ANT IN connector e Center Freq sets the frequency at the center of the screen e Ref Level sets the amplitude reference level top line of the display e Span sets the span of frequencies displayed on the screen SPAN MM RESOLUTION MARKER MARKER CENTER FREQUENCY BANDWIDTH MEASUREMENT SPECTRUM RNRLY ER BW 3 kHz Marker Controls gum Frea MERERI Level prem rene t rene t lt Hunt Marker Indicators Marker Freq MHz indicates the marker frequency position Marker Lvl dBm indicates the marker amplitude position 193 Using the Spectrum Analyzer Measurement Using the Marker Control Fields Position positions the marker on the screen Displayed marker Freq and Lvl are automatically updated Marker To sets the marker to the signal with the largest Peak the signal with the Next largest Peak to the Center Frequency or to the Reference Level SPECTRUM ANALYZER BW 3 kHz Marker Frea 145 28240 AES ANI at Controls Relative frequency and amplitude measurements such as filter bandwidth duplexer rejection insertion loss or harmonic level can be performed using the Delta marker function The Delta marker function is performed by 1 Setting the marker to the first point desired 2 Position the cursor to the marker frequency and or amplitude indicators 3 Press the REF SET key Note that the readout now display
115. ge Measurement Measurement Range 0 to 30 Vrms Accuracy 3 of reading 20 Hz to 15 kHz inputs 21 mV Residual Noise 150uV 15 kHz BW 3 dB Bandwidth Typically 2 Hz to 100 kHz Nominal Input Impedance switchable between I M in parallel with 95 pF and 600 Q floating Resolution 4 digits for inputs 2100 mV 3 digits for inputs 100 mV DC Voltage Measurement 268 Voltage Range 100 mV to 42 V Accuracy 1 0 of reading plus DC offset DC Offset 45 mV Resolution 1 mV AF Analyzer Specifications Distortion Measurement Fundamental Frequency kHz 5 Hz Optional Frequency Range 300 Hz to 10 kHz 5 Option 019 Input Level Range 30 mV to 30 Vrms Display Range 0 1 to 100 Accuracy 1 dB 0 5 to 100 distortion for tones from 300 to 1500 Hz measured with the 15 kHz LPF 1 5 dB 1 5 to 100 distortion for tones from 300 Hz to 10 kHz mea sured with the gt 99 kHz LPF Residual THD Noise 60 dBc or 150 uV whichever is greater for tones from 300 to 1500 Hz measured with the 15 kHz LPF 57 dBc or 450 uV whichever is greater for tones from 300 Hz to 10 kHz measured with the gt 99 kHz LPF Resolution 0 1 Distortion SINAD Measurement Fundamental Frequency kHz 5 Hz Optional Frequency Range 300 Hz to 10 kHz 5 Option 019 Input Level Range 30 mV to 30 Vrms Display Range 0 to 60 dB Accuracy 1 dB 0 to 46 dB SINAD for tones from 300 to 1500 Hz measured with the 15 kHz LPF 1 5 dB 0 to 3
116. in Control Fields e Vert div selects the vertical amplitude per division Units for this field are in Volts kHz or percent depending on the AF Anl In selection e Vert Offset moves the displayed signal above or below the center graticule line e Time div selects the horizontal sweep time per division MARKER SOURCE MARKER MEASUREMENT OSCILLOSCOPE FM Denod Controls Vert div Vert div Indicators Vert Offset Tine div NEEEDIDDENEN EDDINUTEREEEEENN div e Input source is displayed in the lower left corner of the display Marker Time ms changes the units that the marker position is displayed in Displayed value is the time elapsed from the trigger point to the cur rent position e Marker Lvl V kHz changes the units that the marker position is dis played in Displayed value is the signal level at the current position 238 Using the Oscilloscope Measurement Using the Trigger Control Fields From Controls select the desired trigger source Internal uses the signal being displayed Ext TTL uses the signal connected to the rear panel EXT SCOPE TRIGGER INPUT connector Encoder uses the optional signaling encoder Trigger mode is selected as follows In Auto a trigger is automatically generated every 50ms unless a normal trigger is received n Norm a defined trigger required e In Cont the oscilloscope sweeps on each trigger occurrence e In Single the oscilloscope sweeps o
117. ions of the optional radio interface Call Control used to test AMPS TACS Cellular radios Screens that Require an Optional Instrument TDMA Test PDC Test PHP Test CDMA Test CDMA Analyzer CDMA Generator Code Domain Call Control 31 The Test Set s Features User Keys DATA FUNCTIONS gt REF SET METER AVG INCR INCR INCR 10 SET X10 7 LO LIMIT HI LIMIT CURSOR CONTROLE 2 0 YES CANCEL Li ON OFF User k1 k5 keys referred to as local keys these keys enable you to instantly enable a field for fast or repetitive access Local keys function for fields on the screen being displayed only User k k3 keys referred to as global keys these keys enable you to display and control a field from another screen while viewing another screen To Assign a User Key 1 Select the screen which the desired field is on 2 Position the cursor at the desired field using the Knob 3 Press the ASSIGN key 4 Press the desired k1 k5 or k1 k3 key To Un assign a User Key 1 Select the screen which the desired field is on 2 Position the cursor at the desired field using the Knob 3 Press and release the SHIFT key 4 Press the RELEASE key 5 Press the ENTER key 32 Data Function Keys CIUSERDy SHIFT REF SET METER DATA FUNCTIONS 2 AVG INCR INCR
118. measuring audio output power in watts always set Ext Load R field to the Receiver s audio output impedance or to the test load resistance when connected Failure to do so will cause the measurement to be incorrect Coded Squelch Certain receivers use CTCSS CDCSS or trunked radio signalling coded squelch If the receiver is equipped with a coded squelch device that cannot be easily overridden then the instruments AFGen2 or Encoder must be used to open the squelch for measurement Also if any of these are used set Filterl to 300Hz HPF to remove the tone used to open the squelch prior to measurement Refer to the RX or Encoder screen sections in the Test Set User s Guide supplied with the instrument for more information 47 Measurement Guideline 4 Measurement Guideline 4 Additional Measurement Considerations 48 Pressing the PRESET and TX or RX keys at the beginning of each test automatically configures the Test Set for standard transmitter receiver measurements The controls and settings that need to be adjusted during performance of the measurement are discussed in each procedure Additional parameters or controls that may need to be adjusted when testing a particular radio are described in the TX RX Spectrum Analyzer Encoder and Decoder screen sections of the Test Set User s Guide supplied with the instrument Testing FM Radios 49 Introduction Introduction
119. ment Procedure 1 Connect the Receiver as shown On the Test Set 2 Press the PRESET key 3 Press the RX key Using the knob and data entry keys Set RF Gen Freq to the receiver operating frequency Set Amplitude to 47 dBm 1 mV Set AFGen1 To AM at desired modulation depth typically 30 Set Ext Load R to the test load resistance eS L dw dE Set AC Level meter to measure Watts On the Radio set the Receiver s Controls as follows 9 Set power to ON 10 If required set frequency to the same value as step 4 11 Set RF Gain to maximum if equipped 12 Set squelch control to minimum if equipped 13 Set the volume control until the AC Level reads 100 of the Receiver s specified audio output Refer to the audio output specifications for the receiver being tested 153 AM Receivers 154 On the Test Set using the knob and data entry keys 14 Change SINAD meter to read Distortion Distortion is displayed as shown RX TEST AC Level Distortion 17 18 Ref RF Gen Freq AFGen1 Freq AFGen2 Freq Filter 1 To Screen 8 310000 IT ERN A MHz Hz Hz Amplitude AFGen1 To AFGen2 To Filter 2 mere FN FM m 15kHz HPF m Atten Hold On Off Ext Load R Output Port RF Out Dupl 15 Select AC Level 16 Press the REF SET key 17 Decrease the Receiver s volume control until the Test Set s AC Level meter reads 17 dB Distortion displayed as shown abo
120. ment units including watts on the Test Set screen 3 Knob Data Entry 2 Keys 7 SCREEN CONTROL INSTRUMENT STATE EJ DATA HUNCTIONS b rA L7 8 a 9 t EN E e 5 6 dim JCURSOH CONTROLI MHz TE 1al e B kHz iento Scr oJ LA E F cancer one w firey eS S MIC ACC VOLUME SQUELCH AUDIO OUT RF IN OUT DUPLEX OUT 509 COXIAL CABLE SPEAKER AUDIO INPUT ANTENNA RF INPUT 137 AM Receivers Additional Equipment Required Test Load Special Test Considerations See Receiver Test Loads on page 46 Measurement Procedure 1 Connect the Receiver as shown On the Test Set 2 3 Press the PRESET key Press the RX key Using the knob and data entry keys 4 5 6 7 8 138 Set RF Gen Freq to the receiver operating frequency Set Amplitude to 47 dBm 1 mV Set AFGenl To AM at the desired modulation depth typically 30 Set Ext Load R to the test load resistance Set AC Level meter to measure Watts AM Receivers On the Radio set the Receiver s Controls as follows 9 Set power to ON 10 If required set frequency to the same value as step 4 11 Set squelch to minimum 12 Set RF
121. n the Radio set the Receiver s Controls as follows 9 Set power to ON 10 If required set frequency to the same value as step 4 11 Set squelch to minimum 12 Set RF Gain to maximum if equipped 13 Set coded squelch feature if equipped to OFF Failure to set coded squelch to off will cause the SINAD measurement to be incorrect 14 Set the volume control until the AC Level reads 100 of the Receiver s rat ed audio output power FM Receivers Refer to the audio output specifications for the receiver being tested On the Test Set using the knob and data entry keys 15 Decrease Amplitude until the SINAD meter reads 12 dB Sensitivity 12dB SINAD is displayed as Amplitude as shown e Record the level in uv for use in step 17 RX TEST FIT NNI AC Level _ y 0 14 00 24 0 i 452 7 Avg SINAD Center Fre uenc RF Gen Freq AFGen1 Freq AFGen2 Freq Filter 1 To Screen 146 519000 1 0000 1 0000 50Hz HPF q y E Amplitude AFGen1 To AFGen2 To Filter 2 itivi mee FM Sensitivity m oi Atten Hold On Off Ext Load R EXT Output Port CJ If desired use the meter averaging function for the SINAD indicator a Select dB on the SINAD meter b Press the AVG key CJ If desired select the number of readings to average Enter the number of readings to average Higher number of readings averaged will require longer to reach the final indication J I
122. n the Test Set measured FM Deviation is displayed as shown Deviation TX TEST TX Frequency FM Deviation 144 680040 TX Power JAF Freq 0 591 Tune Mode Input Port AF Anl In EM Demod Tune Freq IF Filter Filter 1 EE er BOOZ HEE MHz ilter TX Pwr Zero Ext TX Key e Emphasis Orori etector To measure FM symmetry on the Test Set 6 Set Detector to Pk 7 Record the displayed FM Deviation as Pk 8 Set Detector to Pk 60 FM Transmitters 9 Record the displayed FM Deviation as Pk Calculate the Measurement 10 Calculate the Deviation Symmetry as follows Pk Pk Deviation Symmetry in percent gt 5 gt y ry in PKH X 100 For example 3 010 2 971 swisi 3 010 61 FM Transmitters FM Microphone Sensitivity and Modulation Limiting Measurement Description This procedure is used to measure an FM Transmitter s audio input sensitivity and modulation limiting capability if available Modulation limiting is verified over the Transmitter s audio frequency range FM reference is ANSI EIA RS 152 C 1988 RS 316 B 3 Knob Data Entry 2 Keys 477777 INSTRUMENT STATE apes save DATA l w wy MIC ACC VOLUME SQUELCH AUDIO OUT RF IN OUT SHEILDED AUDIO CABLE ANTENNA
123. n2 Freq Filter 1 To Screen Squelch Sensi BLEU tivity p z d Amplitude AFGen1 To AFGen2 To Filter 2 15kHz HPF u Atten Hold On Off Ext Load R Output Port 8 00 20 Set Amplitude to 47 dBm 21 Slowly increase the AFGEN2 Freq in 0 1 Hz increments until the squelch just closes e Record the frequency 22 Slowly decrease the AFGEN2 Freq in 0 1 Hz increments until the squelch 99 FM Receivers just closes Record the frequency CTCSS Band width RX TEST RF Gen Freq AFGen1 Freq AFGend Freq Filter 1 To Screen 145 280000_ 1 0000 Ee OHz HPF MHz Hz z Amplitude AFGen1 To AFGen2 To Filter 2 u Atten Hold On Otf Ext Load R Output Port 8 00 RF Out Dupl Calculate the Bandwidth 23 Bandwidth Larger AFGen2 Freq Smaller AFGen2 Freq NOTE Calculated bandwidth should be no less than 1 or no more than 6 of the encoder frequency 100 FM Receivers FM CDCSS Sensitivity Measurement or Description This procedure is used to measure an FM Receiver s Continuous Digital Coded Squelch System CTCSS sensitivity The minimum signal input at the Receiver s antenna modulated with digital code that opens the squelch is measured and displayed Squelch hysteresis is also measured and calculated 3 Knob DataEntry 2 Keys SCREEN CONTROL INSTRUMENT STATE Ey HELP CONFIG HOLD PRINT DATA HUNCTIONS p rA U FSET METER AVG
124. nce on a trigger occurrence af ter Reset is selected Level div sets the internal trigger level vertical divisions Pos selects triggering for positive going signals Neg selects triggering for negative going signals Pointer indicates level e Pre Trig sets the number of horizontal divisions to be displayed prior to the trigger Pointer indicates pre trigger point PRE TRIGGER TRIGGER LEVEL POINTER POINTER OSCILLOSCOPE Mark Marker DECODEF RAGIO IMT Indicators Marker Time ms changes the units that the marker position is dis played in Displayed value is the time elapsed from the trigger point to the current position e Marker Lvl V kHz changes units that the marker position is dis played in Displayed value is signal level at current position 239 Using the Oscilloscope Measurements Using the Marker Control Fields e Position positions the marker on the screen Displayed marker Time and Lvl are automatically updated Marker To sets the marker to the signal with the largest Peak Peak or the signal with the most negative peak Peak DELTA PEAK MARKERS OSCILLOSCOPE i Marker rig om BHL SCOPE SPEC AML FM Denod EHC OE F DECODER ndm Marker ft ee ll More Indicators Marker Time ms changes the units that the marker position is displayed in Displayed value is the time elapsed from the trigger point to the cur rent position e Marker Lvl V kHz changes the u
125. ng of new firmware for the host CPU from the front panel Upgrade time is approximately two minutes 307 Reference Oscillator Specifications Reference Oscillator Specifications TCXO Standard Temperature ppm 0 to 55 C Aging lt 2 ppm year Warm up Time lt 30 seconds to be within 2 ppm of final frequency OCXO Option 001 Temperature 0 05 ppm 0 to 55 C Aging lt 0 5 ppm year lt ppm in first year Warm up Time lt 15 minutes to be within 0 1 ppm of final frequency Rear Panel BNC connectors Input Frequency 1 2 5 10 MHz Input Levell gt 0 15 Vrms Output Frequency 10 MHz Output Level gt 0 5 Vrms 1 Electrostatic Discharges to the 10 MHz Ref Input port of the 0 5 kV or the above may casue degradation of performance requiring operator intervention 308 General Specifications General Specifications Size 7 5 H x 13 W x 19 inches 188 H x 330 W x 456 D mm Weight 37 lbs 16 8 kg fully optioned CRT Size 7 x 10 cm Operating Temperature 0 to 55 C Storage Temperature 55 to 75 C Power AC 100 to 240 V 48 to 440 Hz nominally 80 watts DC 11 to 28 V nominally 120 watts Leakage At Signal Generator output frequency and level 40 dBm typical leakage is 0 5 uV induced in a resonant dipole antenna 1 inch from any surface except the rear panel This corresponds to approximately 0 05 uV when measured with a 25 mm two turn loop Spurious leakage levels are typically
126. nge the value of RF Gen Freq until the AF Freq meter reads 7 kHz On the Radio set the Receiver s Controls as follows 17 Set the Receiver s volume control until the AC Level meter indicates the Receiver s rated output power Refer to audio output specifications for the Receiver being tested as required If unknown increase the volume control until the AC Level meter stops increasing or at maximum On the Test Set using the knob and data entry keys 18 Set AF Freq meter to measure SINAD 19 Select AC Level 20 Press the REF SET key SSB Receivers On the Radio set the Receiver s Controls as follows 21 Decrease the Receiver s volume control until the AC Level meter reads 6 dB On the Test Set using the knob and data entry keys 22 Decrease Amplitude until the SINAD meter reads 12 dB Sensitivity at 12dB SINAD is displayed on the screen as Amplitude as shown RX TEST FIO NE AC Level 0 12 57 33 12 Avg Ref RF Gen Freq AFGen1 Freq AFGen2 Freq Filter 1 To Screen 8 310700 1 0000 IGNES ESEPNSIS MHz Hz Hz Amplitude AFGen1 To AFGen2 To Filter 2 Sensitivity RE GU FM Off ojii Atten Hold On Off Ext Load R Output Port RF Out Dupl O If desired use the meter averaging function for the SINAD indicator a Select dB on the SINAD meter b Press the AVG key O If desired select the number of readings to average Enter the number of readings to average
127. nits that the marker position is dis played in Displayed value is the signal level at the current position 240 Using the Oscilloscope The Delta marker function is performed by N om Setting the marker to the first point desired Position the cursor to the marker time and or lvl readouts Press the REF SET key Note that the readout now displays 0 and Ref below it Position the cursor to the Position field Move the marker along the displayed response The marker readout now displays the delta from the set reference point To turn the reference set off e Press the REF SET key e Press the ON OFF key 241 Using the Oscilloscope 242 Configuring for Measurements This chapter provides the information to configure and connect the Test Set to DC power and configure the instrument for operation 243 Preparing the Test Set for DC Operation Preparing the Test Set for DC Operation NOTE Instructions for connecting the Test Set to AC power or to an optional printer if desired are provided in the Test Set s User Guide DC POWER FUSE DC POWER DC POWER KEY CONNECTOR O O O O O O O O O O O OQ o OQ O O OPTIION lt D ormon PARALLEL PORT 696 0 0 00 620969526 9506 Ooops 02626 626 026 026 059590 0262 ogo 625 SERIAL PORT AL MODULATION CI INPUT G O OPTION INTERFACE O o Oxo O o o O O Oo
128. nitude Error lt 0 9 I Q Origin Offset Accuracy 0 5 dB for values to 40 dBc Frequency Error Accuracy 2 5 Hz plus reference accuracy 296 AF Analyzer Specifications AF Analyzer Specifications Frequency Measurement Measurement Range 20 Hz to 400 kHz Accuracy 0 02 plus resolution plus timebase accuracy External Input 20 mV to 30 Vrms Resolution f 10 kHz 0 01 Hz f 100 kHz 0 1 Hz f 2100 kHz I Hz AC Voltage Measurement Measurement Range 0 to 30 Vrms Accuracy 3 of reading 20 Hz to 15 kHz inputs 21 mV Residual Noise 150 uV 15 kHz BW 3 dB Bandwidth Typically 2 Hz to 100 kHz Nominal Input Impedance switchable between 1 M in parallel with 95 pF and 600 Q floating Resolution 4 digits for inputs 2100 mV 3 digits for inputs 100 mV DC Voltage Measurement Voltage Range 100 mV to 42 V Accuracy 1 0 of reading plus DC offset DC Offset 45 mV Resolution 1 mV 297 AF Analyzer Specifications Distortion Measurement Fundamental Frequency Range 300 Hz to 10 kHz 5 Input Level Range 30 mV to 30 Vrms Display Range 0 1 to 100 Accuracy 1 dB 0 5 to 100 distortion for tones from 300 to 1500 Hz measured with the 15 kHz LPF 1 5 dB 1 5 to 100 distortion for tones from 300 Hz to 10 kHz mea sured with the gt 99 kHz LPF Residual THD Noise 60 dBc or 150 uV whichever is greater for tones from 300 to 1500 Hz measured with the 15 kHz LPF 57 dBc or 450 uV whichever is grea
129. nnect the signal reference to ground or float The connectors and controls located on the rear panel are as follows POWER F l ON RF IN OUT The TestSet s Features Non Bracketed Keys and Memory Card Slot CURSOR CONTROLI _ kHz YES NO o ms 4 Hz c e BR E RN E MIC ACC VOLUME SQUELCH AUDIO OUT DUPLEX OUT ANT IN H Non Bracketed Keys e 99 9 The POWER key turns the instrument on or off The SHIFT key is used to select the blue labeled functions listed above certain keys The CANCEL key is used to cancel an entry in progress or stop a running IBASIC program The n key is used to move the cursor to the left when entering numbers in a field thereby erasing the previous characters The Memory Card Slot Slot for memory cards that are inserted to load software or to record test results 39 The Test Set s Features The Test Set s Rear Panel Features Oo DC oO FUSE Oo Z EE E oo 9 n E ER Ez BR oe e Ho 3 OO 8 off fi Ze O 8 3 O Fi z DC INPUT fal 5 Oo B ES gsAn VDC Oo Z SERIAL PORT Oo z OPTION o 8 5 E 1Q E 9 RF 5o E 26 ot 1143 as MHz E MODULATION C AUDIG O cwi ETIE o2 INPUT MONITOR og O ag m HEADPHONE du Connectors HP IB Connector optional 24 pin connector
130. ns Minimum Squelch Sensitivity is displayed on the screen as Amplitude as shown RX TEST AC Level RF Gen Freq AFGent Freq AFGen2 Freq Filter 1 To Screen E 1 0000 1 0000 Squelch Sensi MHz m yy Se ti it Amplitude AFGen1 To AFGen2 To Filter 2 1V1 FM FM 15kHz HPF y o Atten Hold Output Port IRF Out Dupl Ext Load R ERU I 184 SSB Receivers 21 Set Amplitude to 137 dBm and verify squelch closes If not repeat step 19 amp step 20 22 Increase until the Receiver s squelch just opens e Record this level 23 Decrease Amplitude until the Receiver s squelch just closes e Record this level Calculate the reading 24 Minimum Squelch Hysteresis is the difference between the two readings On the Test Set using the knob and data entry keys 25 Increase Amplitude until the Receiver s squelch just opens e Record this level Maximum Squelch Sensitivity is displayed on the screen as Amplitude as shown RX TEST AF Freq AC Level 1 11689 0 1769 Avg RF Gen Freq AFGeni Freq AFGen2 Freq Filter 1 To Screen 28 310700 _ 1 0000 1 0000 A MHz Hz Hz Squelch Sensi tivity AFGen2 To FM Amplitude Atten Hold On Off Output Port RF Out Dupl AFGen1 To FM j Filter 2 15kHz HPF ojii oji Ext Load R 8 00 26 Decrease Amplit
131. ns are access from the AF AL and OSCILLOSCOPE screens 235 Using the Oscilloscope Oscilloscope Overview Table 1 CAUTION 236 This procedure is provided as an overview of the Oscilloscope s operation The screen choices and displayed parameters are described and illustrated Measurement Procedure 1 Connect the signal to the appropriate connector Transmitter Off the Air Receiver Under Passive Oscillo Under Test Transmission Test scope Probe Connect Trans Connect an Connect Connect the mitter s RF Antenna Receiver s Prove to OUTPUT to AUDIO OUT AUDIO IN HI to Test Set s PUT to Test Test Set s ANT Set s AUDIO RF IN OUT IN HI Do not exceed the connector s rated input or permanent instrument damage may result On the Test Set 2 Press the PRESET key Using the knob 3 Select the AF ANL screen 4 Based on the connection in step 1 select from the AF Anl In field s list of choices the desired input to the Oscilloscope FM Demod for FM demodulated audio from input signals connected to the RF IN OUT or ANT IN connectors AM Demod for AM demodulated audio from input signals connected to the RF IN OUT or ANT IN connectors SSB Demod for SSB demodulated audio from input signals connected Using the Oscilloscope to the RF IN OUT or ANT IN connectors Audio In for a signal connected to the AUDIO IN connector Radio Int for a signal connected to the opti
132. o side band signals of equal RF levels are produced as shown DISTORTION SIDEBAND PRODUCT SIGNALS SPECTRUM ANALYZER BH 300 Hz rker rea 21 269500 Lol 5 62 To Screen FF GEN SSB Transmitters NOTE Test set up and cabling for this test are critical RF feedback into the Transmitter audio input may cause the displayed waveform to be distorted Use caution to carefully bypass input lines at the microphone connector when performing this test 17 Verify that the distortion products smaller signals to either side of the side band signals do not exceed the Transmitter s specification If incorrect repeat step 4 using reduced modulation levels until the distor tion products meet specified limits NOTE If the distortion product specification is expressed as a percentage it must be converted to dB for use in this measurement A rating of 10 distortion products corresponds to a reduction of 20 dB 5 is 26 dB and 3 is 30 dB If the distortion product specification is unknown use 30 dB On the Test Set 18 Select TX Power W 19 Press the REF SET key Measurement results are displayed as TX Power Carrier Suppression is displayed as TX Power as shown TX TEST TX Frequency AC Level 28 311451 0 2371 SSB TX Power AF Frea Power 16 3 6 11381 TX TEST TX Frequency AC Level 28 301370 0 2371 Carrier Sup f TX Power NN AE Freq pression 42 94 6 11381
133. oad R to the specified audio output impedance typically 8 ohms 8 Set AC Level meter to measure Watts On the Radio set the Receiver s Controls as follows 9 Set power to ON 10 If required set frequency to the same value as step 4 11 Set RF Gain to maximum if equipped 12 Set coded squelch feature to minimum if equipped 13 Set the volume control until the AC Level reads 100 of the Receiver s specified audio output Refer to the audio output specifications for the receiver being tested FM Receivers On the Test Set using the knob and data entry keys 14 Decrease Amplitude until the SINAD meter reads 12 dB CJ If desired use the meter averaging function for the SINAD indicator a Select dB on the SINAD meter b Press the AVG key O If desired select the number of readings to average Enter the number of readings to average Higher number of readings averaged will require longer to reach the final indication RX TEST Sar AC Level t tt a 0 4106 Avg RF Gen Freg AFGent Freq AFGen2 Freq Filter 1 To Screen 145 280000 1 0000 400 0 A MHZ Hz Hide B Amplitude AFGen1 To AFGen2 To Filter 2 O Audio Out 15kHz HPF u 10 00 m Atten Hold On Off Ext Load R 15 Set Amplitude units to dBm 16 Increase Amplitude more positive by 3 dB e Record Amplitude setting for later use 113 FM Receivers 114 On the Signal Generator 17 18 19 20 21 22 23 24 2
134. ob Data Entry 2 Keys INSTRUMENT STATE 7 8 9 za Gi 4 5 6 s cos 1 2 3 v oji LA E No a rx pu ovem AP any dog MIC ACC VOLUME SQUELCH AUDIO OUT SHEILDED AUDIO CABLE ANTENNA MICROPHONE RF OUT AUDIO INPUT 74 CAUTION NOTE FM Transmitters Measurement Procedure 1 Connect the Transmitter as shown The RF present at the Test Set RF IN OUT connector must not exceed 60W continuous or 100 Watts for 10 sec minute or permanent instrument damage may result On the Test Set 2 3 Press the PRESET key Press the TX key Using the knob and data entry keys 4 5 6 7 Set Filter 1 to 300 Hz HPF Select the AF Freq Meter Select Distn from the Choices field Set AFGen1 Lvl so that displayed FM deviation is 100 of the Transmit ter s specified maximum frequency deviation Do not exceed the specified input level that causes maximum frequency deviation or the Transmitter s modulation limiting circuits will cause added distortion Refer to the input level deviation specifications for the Transmitter being tested On the Radio 8 Key the Transmitter and keep keyed until reading displays Distortion in percent or dB is displayed on the Test Set as shown
135. ocated verify that the transmitter is the source and not another object radiated emissions near the test site CAUTION Measurement Procedure 1 Connect the Transmitter as shown The RF present at the Test Set RF IN OUT connector must not exceed 60W continuous or 100 Watts for 10 sec minute or permanent instrument damage may result On the Test Set 2 Press the PRESET key 3 Press the TX key Using the knob 4 Set AF Anl In to SSB Demod On the Radio 5 Key the Transmitter and keep keyed until the remaining steps are complet ed On the Test Set using the knob and data entry keys 6 Set AFGen1 Lvl until a measurable RF signal is displayed typically 25 10 mV 171 SSB Transmitters 7 Select SPEC ANL screen 8 Set Span to 7 7 MHz 9 Set Ref Level to place the carrier peak at the top graticule line To set Ref Level From the Marker screen select Marker To Peak Select Marker To Ref Level 10 Tune Center Freq in MHz steps anywhere from 400 kHz to 1 GHz in search of harmonics subharmonics multiples or spurious emissions NOTE If spurious emissions are suspect un key the Transmitter and verify that emissions are from the transmitter and not another source To measure spurious emission of the transmitter under test e Place at center frequency e Or perform the following a Select Main from the Controls field b Select Markers from the Choices field c Position the marker on
136. ominal Residual AM 0 196 in a 50 Hz to 15 kHz BW Resolution 0 0596 AM for 0 to 1096 AM 0 5 AM for 10 to 100 AM 289 Signal Generator Specifications TDMA Signal Generator HP 8920B Option 500 includes HP 83201B Frequency Range 824 MHz to 894 MHz Output Level Range RF In Out 22 to 127 dBm Duplex Out 4 to 127 dBm Residual Error Vector Magnitude lt 3 0 Residual Phase Error lt 2 6 Residual Magnitude Error lt 2 6 IQ Origin Offset lt 30dBe within 15 C of last calibration Frequency Error 4 Hz plus reference error 290 Audio Source Specifications Audio Source Specifications These specifications apply to both internal sources Frequency Range dc to 25 kHz Accuracy 0 025 of setting Resolution 0 1 Hz Output Level Range 0 1 mV to 4 Vrms Maximum Output Current 20 mA peak Output Impedance 1 Q 1 kHz Accuracy 2 of setting plus resolution Residual Distortion 0 125 for tones 20 Hz to 25 kHz in an 80 kHz BW THD plus noise amplitude gt 200 mVrms Resolution Level 0 01 V 50 uV Level 0 1 V 5 mV Level lt 1 V 5 mV Level 10 V 50 mV Offset in DC Coupled Mode 50 mV 291 RF Analyzer Specifications RF Analyzer Specifications RF Power Measurement Standard Frequency Range 400 kHz to 1 GHz Measurement Range 1 mW to 60 W continuous 100 W for 10 seconds minute measured at RF IN OUT connector Accuracy 5 of reading 0 01 mW for temp
137. onal Coupler 212 Using the Tracking Generator On the Test Set using the knob and data entry keys 20 From Controls select Main 21 Select Marker from the Choices field 22 From Marker To select Ref Level 23 Use the Marker position to measure the response to the frequency s of in terest Return loss is displayed as Lvl as shown RESPONSE RETURN LOSS SPECTNUM ANALYZER 7 BW 300 kHz Marker rea 145 00000 Center Freaj Ref Level Span 145 000000 MHz dBm MHz Calculate the Return Loss in VSWR 24 Use the following chart to convert calculated return loss into VSWR Return Loss VSWR 5 0 dB 3 6 10 0 dB 1 9 15 0 dB 1 4 20 0 dB 1 2 25 0 dB 1 12 30 0 dB 1 07 213 Using the Tracking Generator 1 4 Wave Coaxial Filter Tuning Swept 214 This procedure is used to measure the notch depth and or band pass of a 1 4 wave coaxial filter using the Spectrum Analyzer Tracking Generator option Pass frequency is measured and can be adjusted by trimming length from the coaxial filter SCREEN CONTROL 777777 INSTRUMENT STATE MSSG HELP CONFIG HOLD PRINT ADRS SAVE g DATA FUNCTIONS pata HAE 5 e tf g CURSOR CONTROL By IEEE 4 5 6 1 12 13 y PUSH TO SELECT cancer e bi
138. onal rear panel Radio Inter face connector Ext Mod for a signal connected to the rear panel MODULATION IN PUT connector Mic Mod for a signal connected to the MIC ACC connector MIC pin FM Mod for the FM modulated audio from the RF Gen section AM Mod for the AM modulated audio from the RF Gen section Audio Out for the signal present at the AUDIO OUT connector 5 Select from the Scope To field s list of choices where in the AF Analyzer s circuitry the signal is routed to the Oscilloscope NOTE All choices except Input are capacitive coupled Use Input if the signal being measured is lt 1Hz Input to route the audio to the Oscilloscope without being processed Filters to route the audio to the Oscilloscope after passing through Fil ters 1 and 2 De emp to route the audio to the Oscilloscope after passing through Fil ters 1 and 2 and the De Emphasis circuitry Notch to route the audio to the Oscilloscope after passing through Fil ters 1 and 2 the De Emphasis circuitry and Notch circuitry 6 Select the SCOPE screen 7 Select the CONTROLS field 8 Continue the measurement by selecting a control screen from the list of choices and referring to the following see Measurements Using the Main Control Fields on page 238 see Measurement Using the Trigger Control Fields on page 239 see Measurements Using the Marker Control Fields on page 240 237 Using the Oscilloscope Measurements Using the Ma
139. or Calculate the Receiver Sensitivity Degradation 18 Calculate as follows Sensitivity Degradation Step 5 Sensitivity Step 7 Sensitivity For example 119 dBm 114 dBm 5 dB 231 Using the Tracking Generator 232 Oscilloscope Measurements 233 Introduction Introduction Each procedure may contain the following information e A brief measurement overview and a reference to applicable TIA EIA spec ifications for each test e A list of the Test Set options and additional test equipment required to per form the procedure e Any special test considerations that need to be considered for safety mea surement accuracy etc e Step by step procedures required to perform each measurement with illus trations Refer to Configuring for Measurements on page 243 or the Test Set s User Guide on preparing the Test Set for operation 234 Using the Oscilloscope Using the Oscilloscope The built in 50 kHz digital oscilloscope provides e multiple triggering formats internal external and encoder e single shot and pre trigger viewing for single events e full marker capability with automatic level and time readout Time division volts division and vertical offset are displayed and can be changed using the front panel knob Input to the Oscilloscope is provided from various sources including direct inputs to the Audio Input and Modulation Input connectors Oscilloscope functio
140. performance requiring operator intervention 279 Save Recall Registers Save Recall Registers Approximately 128 kilobytes RAM available for non volatile save recall of settings This typically will allow you to save gt 100 sets of instrument settings depending on the type of information saved Additional save recall storage memory can be added by ordering Option 005 280 General Specifications General Specifications Size 7 5 H x 13 W x 19 inches 188 H x 330 W x 456 D mm Weight 35 Ibs 17 1 kg fully optioned CRT Size 7 x 10 cm Operating Temperature 0 to 55 C Storage Temperature 55 to 75 C Power AC 100 to 240 V 48 to 440 Hz nominally 80 watts DC 11 to 28 V nominally 120 watts Leakage At Signal Generator output frequency and level 40 dBm typical leakage is 0 5 uV induced in a resonant dipole antenna 1 inch from any surface except the rear panel This corresponds to approximately 0 05 uV when measured with a 25 mm two turn loop Spurious leakage levels are typically lt 1 u V in a resonant dipole antenna 281 General Specifications 282 11 HP 8920B Specifications Specifications describe the Test Set s warranted performance and are valid over the entire operating environmental range unless otherwise noted 283 Supplemental Characteristics are intended to provide additional information useful in applying the instrument by giving typical but non warranted performan
141. power measurement device and knowledge of the transmitter s carrier suppression and the current operating side band selection are required for precise measurements CAUTION Measurement Procedure 1 Connect the Transmitter as shown The RF present at the Test Set RF IN OUT connector must not exceed 60W continuous or 100 Watts for 10 sec minute or permanent instrument damage may result On the Test Set 2 Press the PRESET key Using the knob and data entry keys 3 4 5 2 Fe NS Set Amplitude to Off Set AFGenl To to Audio Out Assign global key k1 to AFGen1 To a Select AFGen1 To mV field b Press the SHIFT key c Press the ASSIGN key d Press the k1 key Set AFGen2 Freq to 1 6 kHz Set AFGen2 To to Audio Out at 50 mV Set AFGen2 To to Audio Out Assign global key k2 to AFGen2 To Assign like in step 5 167 SSB Transmitters 168 10 Select SPEC ANL screen 11 Set Center Freq to transmitter frequency 1 kHz USB or 1 kHz LSB depending on side band mode 12 Set Ref Level to 50 dBm To set Ref Level From the Marker screen select Marker To Peak Select Marker To Ref Level 13 Set Span to 5 KHz On the Radio 14 Key the Transmitter On the Test Set using the knob and data entry keys 15 Adjust Ref Level and or Span as required to display the signal 16 Use global keys k1 and or k to adjust AFGen1 and AFGen2 output levels until tw
142. provides communication between the Test Set and other instruments or a computer using the IEEE 488 Hewlett Packard Interface Bus HP IB SERIAL PORT Connector optional 6 pin RJ 11 dual serial RS 232C port for entering programs printing test results and screen images and sending test results to external devices DCCURRENT MEASUREMENT Terminals optional dual banana jacks to measure from 0 to 10 ADC MODULATION INPUT Connector female BNC connector to input an external signal to the modulators Maximum input level is 12 V peak full scale input 1 V peak and nominal input impedance is 6000 e CRT VIDEO OUTPUT Connector female BNC connector provides CRT video to an external multisync video monitor 40 The Test Set s Features EXT SCOPE TRIGGER INPUT Connector female BNC connector to input an external oscilloscope trigger Maximum input level is 20 V peak 10 MHz REF OUTPUT Connector female BNC connector outputs a 10 MHz reference signal for locking external instruments 10 MHz REF INPUT Connector female BNC connector to input an external 1 2 5 or 10 MHz reference signal AUDIO MONITOR OUTPUT Connector female BNC connector provides an output from the AF Analyzer Level is not affected by the VOLUME control but is affected by the SQUELCH control Chassis Ground Terminal provides a chassis connection Also provides a safety ground when DC power is used RADIO INTERFACE Connector
143. ption This procedure is used to measure the return loss of an antenna through a directional bridge and the Spectrum Analyzer Tracking Generator option Return loss is measured and can be converted into VSWR using a table Knob Data Entry 2 Keys INSTRUMENT STATE PRINT Abe SAVE pata 7 L8 lo ES MIC ACC VOLUME SQUELCH AUDIO OUT RF IN OUT DUPLEX OUT ANT IN Source Reflected Return Loss Bridge or Directional Coupler Using the Tracking Generator Test Set Options Required Spectrum Analyzer Tracking Generator option 102 Additional Equipment Return Loss Bridge or Directional Coupler and an Antenna Required CAUTION NOTE Measurement Procedure 1 Connect the bridge or coupler as shown Do not exceed the connector s rated input or permanent instrument damage may result On the Test Set 2 Press the PRESET key Using the knob and data entry keys Select the SPEC ANL screen From the Controls select Ant Set Center Freq to the center frequency of the antenna under test Set Span to view desired frequency range Set Ref Level to 0 dB or greater From Controls select Main then select RF Gen from the Choices field From Controls select Track 10 Set Amplitude to 0 dBm v0 10 M
144. ption 050 or IHP 8920D Center Frequency Accuracy in DC FM Mode External source impedance lt 1 kQ 500 Hz after DCFM zero typical 50 Hz Ext Mod Input Impedance 600 nominal Resolution 50 Hz for lt 10 kHz deviation 500 Hz for 210 kHz deviation 258 AM Signal Generator Specifications Frequency Range 1 5 to 1000 MHz usable to 250 kHz AM Depth For RF IN OUT levels lt 25 dBm or DUPLEX OUT levels lt 1 dBm 0 to 90 usable to 99 0 to 70 usable to 99 HP 8920A Option 050 or HP 8920D AM Rate 20 Hz to 25 kHz 3 dB bandwidth AM Accuracy lt 10 AM 5 of setting 1 0 AM at 1 kHz rate gt 10 AM 5 of setting 1 596 AM at 1 kHz rate AM Distortion THD Noise 0 3 to 3 kHz BW lt 2 at 1 kHz rate lt 30 AM lt 3 at 1 kHz rate lt 90 AM Ext Mod Input Impedance 600 Q nominal Residual AM 0 196 in a 50 Hz to 15 kHz BW Resolution 0 0596 AM for 0 to 1096 AM 0 5 AM for 10 to 100 AM 259 Signal Generator Specifications TDMA Signal Generator HP 8920D or 8920A with Option 050 and HP 83201A Frequency Range 824 MHz to 894 MHz Output Level Range RF In Out 22 dBm to 127 dBm Duplex Out 4 dBm to 127 dBm Residual Error Vector Magnitude lt 3 0 Residual Phase Error lt 2 6 Residual Magnitude Error lt 2 6 IQ Origin Offset lt 30 dBc within 15 C of last calibration Frequency Error 4 Hz plus reference 260 Audio Source Specifications Audio Sourc
145. quency or frequency error is calculated 3 Knob Data Entry 2 Keys SCREEN CONTROL INSTRUMENT STATE Missa ds qosric tl DATA acros Bm ppm f vw MIC ACC VOLUME SQUELCH AUDIO OUT RF IN OUT DUPLEX ANT AN rome SHEILDED AUDIO CABLE 500 COXIAL CABLE 1 SSB TRANSMITTER UNDER TEST ANTENNA MICROPHONE RF OUTPUT AUDIO INPUT 163 SSB Transmitters Test Set Options Required The typical error for the standard Test Set timebase is 2 3 Hz per 1 MHz when measuring carrier frequency If greater frequency accuracy is required use an Test Set with Option 001 High Sta bility Timebase Special Test Considerations The accuracy and stability of both the AF source and the RF counter and knowledge of the transmitter s carrier suppression and the current operating side band selection are required for precise frequency frequency error measurements CAUTION Measurement Procedure 1 Connect the Transmitter Under Test as shown The RF present at the Test Set RF IN OUT connector must not exceed 60W continuous or 100 Watts for 10 sec minute or permanent instrument damage may result On the Test Set 2 Press the PRESET key 3 Press the TX key Using the knob and data
146. red to view the desired signal NAM BB W 120 AM Transmitters Once the desired carrier is found 8 From Controls select Main 9 Select Marker from the Choices field 10 Use the Marker To field to select the desired carrier On the Test Set frequency and level are displayed as shown SPECTRUM ANALYZER Level amp Frequency displayed 11 To demodulate the carrier a With the marker on the desired carrier select Marker To to Center Freq From Controls select Main Select Marker from the Choices field Decrease the Span to 7 5 MHz or less Adjust the Volume and Squelch controls to listen to the demodulat ed carrier CRT AM Off The Air Monitoring on a Known Transmitter Carrier Frequency c UR Ur Press the PRESET key Press the TX key Set AF Anl In to AM Demod Set Tune Mode to Manual Set Tune Freq to desired frequency Set Input Port to Ant 121 AM Transmitters AM Output Power Deviation and Frequency Frequency Error Measurement Description This procedure is used to measure an AM Transmitter s output carrier power and frequency or frequency error into 50 O For AM Transmitters modulation depth and modulating frequency are measured 3 Knob Data Entry 2 Keys 477777 INSTRUMENT STATE VOLUME SQUELCH AUDIO OUT MIC ACC RF IN O
147. ress the PRESET key Using the knob and the data entry keys Select the AF ANL screen Set Filter 1 to 20 Hz HPF setting Set Filter 2 to 300 Hz LPF setting Select the DECODER screen Set Mode to CDCSS Set Standard to CDCSS 10 Set Input Level to 0 95 kHz 3 4 5 6 Set Settling to Slow setting 7 8 9 11 Set Arm Meas to Cont On the Radio 12 Key the Transmitter and keep keyed until the remaining steps are complet ed Data rate binary data bin and the Octal Code s are displayed on the Test Set as shown 68 NOTE FM Transmitters Because framing information to indicate when a code word is not sent the decoded data displayed can result in several possible code combinations as shown NPC may appear indicating that no primary code matches the decoded data SIGNALING DECODER Status Data Rate b Data Rate 134 ie Computing Data bin i Single Cont Mode Binary Data 1101100011000010101111 Octal Code s Code oct Standard CDCSS 143 333 AF Anl In To Screen Input Level Trig Level 242 mV Polarity To measure deviation of the data stream on the Test Set 13 Press the TX key Data stream deviation is displayed as FM Deviation 69 FM Transmitters FM DTMF Encodes and Deviation Measurement 70 Description This procedure is used to measure an FM Transmitter s Dual Tone Multi Frequency DTMF frequency deviation and fr
148. rier 116 dBc Hz 287 Signal Generator Specifications FM 288 FM Deviation Rates gt 25 Hz 100 kHz for f from 0 25 to lt 249 MHz 50 kHz for f from 249 to lt 501 MHz 100 kHz for f from 501 to 1000 MHz FM not specified for f minus FM dev 250 kHz FM Rate 1 kHz reference Internal DC to 25 kHz 1 dB BW External AC Coupled 20 Hz to 75 kHz typical 3 dB BW External DC Coupled dc to 75 kHz typical 3 dB BW FM Accuracy lt 10 kHz dev 1 kHz rate 3 5 of setting 50 Hz 210 kHz dev 1 kHz rate 3 5 of setting 500 Hz FM Distortion THD Noise 0 3 to 3 kHz BW lt 0 5 at gt 4 kHz deviation and 1 kHz rate Center Frequency Accuracy in DC FM Mode External source impedance lt 1 kQ 500 Hz after DCFM zero typical 50 Hz Ext Mod Input Impedance 600 Q nominal Resolution 50 Hz for lt 10 kHz deviation 500 Hz for 210 kHz deviation AM Signal Generator Specifications Frequency Range 1 5 to 1000 MHz usable to 250 kHz AM Depth For RF IN OUT levels lt 25 dBm or DUPLEX OUT levels lt 1 dBm 0 to 90 usable to 99 0 to 70 usable to 99 HP 8920B Option 051 AM Rate 20 Hz to 25 kHz 3 dB bandwidth AM Accuracy lt 10 AM 5 of setting 1 0 AM at 1 kHz rate gt 10 AM 5 of setting 1 596 AM at 1 kHz rate AM Distortion THD Noise 0 3 to 3 kHz BW lt 2 at 1 kHz rate lt 30 AM lt 3 at 1 kHz rate lt 90 AM Ext Mod Input Impedance 600 Q n
149. rious Output Measurement 170 Squelch Sensitivity Measurement 182 Symmetry Measurement 59 318 T Test Load Requirement 46 Testing AM Radios 115 Testing FM Radios 48 Tracking Generator 1 4 Wave Coaxial Tuning Swept 214 Antenna Return Loss VSWR Mea surement and Tuning 210 Cable Fault Location 218 Passive Cavity Return Loss Measure ment 222 Repeater System Effective Sensitivity Measurement 228 Using 205 Transmitter High Power 191 206 Transmitter Low Power 236 191 206 236 Transmitter Testing 48 U User Keys 32 Using the Oscilloscope 235 Using the Spectrum Analyzer 190 Using the Tracking Generator 205 Index V Variation Of Sensitivity With Signal Frequency Measurement 87 140 319
150. rol is used e RECALL key lists and selects a previously stored instrument setup MEAS RESET key clears the measurement history for all of the instrument s measurement algorithms and re starts all measurements that were in progress e PRESET key restores most instrument settings to their factory default states Configure settings are not affected e ADRS key displays the current HP IB address e SAVE key stores an instrument setup The Test Set s Features DATA FUNCTIONS DATA REF SET METER AVG 2091599993 7 8 9 ee LO LIMIT HILIMIT E dB 5E CURSOR CONTROLE PUSH TO SELECT YES No o L7 Hr SHIFT CANCEL q ONORE id Ee oaw Data Entry keys used to enter or change alphanumeric data 0 9 A F e for measurements or field entries The EEX key is used ee 0 20V CET or to enter the exponent for scientific notation Termination keys used to input the entered data in the units selected Also allows entry of YES or NO to confirm selected operations before they are executed ENTER key selects a field or screen and enters numbers when the unit of measure is not changed or not specified e ON OFF key enables and disables measurements and turns numeric fields such as Amplitude on and off 37 The Test Set s Features
151. s 4 Set RF Gen Freq to the receiver operating frequency 5 Set Amplitude to 47 dBm 1 mV 6 Set AFGenl To 60 of the Receiver s specified maximum frequency de viation typically 3 kHz 7 Set Ext Load R to the test load resistance 8 Set AC Level meter to measure Watts 81 FM Receivers NOTE 82 On the Radio set the Receiver s Controls as follows 9 10 11 12 13 14 Set power to ON If required set frequency to the same value as step 4 Set squelch to minimum Set RF Gain to maximum if equipped Set coded squelch feature if equipped to OFF Refer to Coded Squelch on page 47 for information on opening Receivers with coded squelch Slowly increase volume control until the AC Level reaches the Receiver s rated output power or reaches a maximum level stops increasing Refer to audio output specifications for the Receiver being tested as required If the rated output cannot be obtained troubleshoot and repair the Receiver s audio stages is necessary Measurement results are displayed on the Test Set as shown RX TEST Si NE AC Level Audio AF 0 12 09 Avg Output Power RF Gen Freq AFGen1 Freq AFGen2 Freq Filter 1 145 280000_ 1 0000 INE A MHz MHz Hz Amplitude AFGen1 To AFGen2 To Filter 2 SkHz HPF Atten Hold m On Off Ext Load R Output Port RF Out Dupl FM Receivers FM SINAD Receiver Center Frequency and Modulation Acceptance Band width M
152. s 0 and Ref below it 4 Position the cursor to the Position field 5 Move the marker along the displayed response The marker readout now displays the delta from the set reference point To turn the reference set off e Press the REF SET key e Press the ON OFF key 194 Using the Spectrum Analyzer Measurements Using the Auxiliary Control Fields From Controls select Off to update the display after each sweep or Pk Hold to retain the highest input value for each point in successive sweeps Input Atten sets the input attenuator to Automatic or Hold If Hold is selected a specific level can also be selected From Sensitivity select Normal for normal input sensitivity or High for increased input sensitivity 1 uV to locate low level signals Sensitivity also is used to set the vertical scale dB Div NOTE Using High Sensitivity may cause erroneous amplitude or AM side band amplitude measurements e From Normalize select Save B to save the current trace can only be performed when A Only is selected select to display a continuously updated screen normal operation select to display the difference between the trace saved using Save B and the current trace SPECTRUM ANALYZER E BW 3 kHz ace __ Marker Frea 145 28240 La a al Controls Input Atten Autot Held Marker Indicators Marker Freq MHz changes the units that the marker frequency is displayed in e Marker Lvl dBm
153. sure ment 93 145 CTCSS Encoder Frequency Measure ment 65 CTCSS Sensitivity and Bandwidth Measurement 97 Cursor Control 34 313 Index D E Data Entry Keys 33 Envelope Display Measurement 133 DC Power Configuration 244 Determining Unknown AM Transmitter Carrier Frequency 119 Deviation Measurement 56 59 65 67 70 Distortion Measurement 174 DTMF Encoding Measurement 70 314 F Features 26 Field Strength Measurement 196 FM 20 dB Quieting Sensitivity Measure ment 91 Audio Distortion Measurement 74 108 Audio Frequency Response Measure ment 105 Audio Output Power Measurement 80 CDCSS Coding Measurement 67 CDCSS Sensitivity Measurement 101 Critical Squelch Sensitivity Measure ment 93 145 CTCSS Encoder Frequency Measure ment 65 CTCSS Sensitivity and Bandwidth Measurement 97 Deviation Measurement 56 59 65 67 70 DTMF Encoding Measurement 70 Frequency Frequency Error Measure ment 56 Harmonic Measurement 76 Maximum Squelch Sensitivity Mea surement 93 145 Microphone Sensitivity Measure ment 62 125 Modulation Acceptance Bandwidth Measurement 83 Modulation Limiting Measurement 62 125 Output Power Measurement 56 Receiver Center Frequency Measure ment 83 SINAD Measurement 83 Spurious Output Measurement 76 Spurious Response Attenuation Mea surement 111 Symmetry Measurement 59 Variation Of Sensitivity With Signal Index Fr
154. t Guideline 2 Measurement Guideline 2 Cabling and Adapter Considerations For most FM AM and SSB measurements only the standard Test Set with correct interconnecting cables and adapters are required Output Power If output power is greater than 60W continuous an external attenuator is also required Any other additional equipment or Test Set options that are required to perform the measurement are listed in the procedure Cabling Test Loads When measuring audio output a Test Load with a resistance value dependent on the Receiver s output impedance normally 8 Q is required In most cases a non inductive resistor with a power rating sufficient for the Receiver s rated output power and resistance that matches the speaker impedance can be used Typically the test load is connected at the Test Set AUDIO IN connector using a BNC to dual banana adapter Spectrum Analyzer For Spectrum Analyzer measurements the Spectrum Analyzer Tracking Generator option 002 must be installed in the Test Set Oscilloscope For Oscilloscope Measurements Hewlett Packard s HP 104XX series passive Oscilloscope probes can be used to input signals to the Oscilloscope via the front panel Audio Input or rear panel MODULATION INPUT connectors 45 Measurement Guideline 3 Measurement Guideline 3 Special Test Considerations 46 Information for performing any of the FM AM or SSB measurements Coaxial Cable Use short runs
155. t Main Select Marker from the Choices field Decrease the Span to 7 5 MHz or less Adjust the Volume and Squelch controls to listen to the demodulat ed carrier oco c FM Off The Air Monitoring on a Known Transmitter Carrier Frequency Aun amp wWN Press the PRESET key Press the TX key Set Tune Mode to Manual Set Tune Freq to known frequency Set Input Port to Ant Set IF Filter to 230 kHz if necessary 55 FM Transmitters FM Output Power Deviation and Frequency Frequency Error Measurement Description This procedure is used to measure an FM Transmitter s output carrier power and frequency or frequency error into 50 Q For FM Transmitters deviation and modulating frequency are also measured FM reference is ANSI EIA RS 152 C 1988 RS 316 C 3 Knob Data Entry 2 Keys 477777 INSTRUMENT STATE MIC ACC VOLUME SQUELCH AUDIO OUT RF IN OUT 500 COXIAL SHEILDED AUDIO CABLE ANTENNA MICROPHONE RF OUT AUDIO INPUT 56 FM Transmitters The typical error for the standard Test Set timebase is 2 3 Hz per 1 MHz when measuring carrier frequency If greater accuracy is required use a Test with Option 001 High Stability Timebase Test Set Options Required Special Test Considerations Cable and Adapter Loss on page 46
156. t Tone frequency deviation is displayed as FM Deviation as shown On the Test Set Tone frequency is displayed as AF Freq TX Frequency 145 TX Power TX TEST 890058 0 587 FM Deviation Tone Deviation 0 980 AF Freq 0 10354 Tone Frequency Tune Mode Auto Manual Tune Freq 145 280000 MHZ TX Pwr Zero Zero AF Anl In FM Demod Filter 1 Input Port IF Filter 45 kHz ilter 2 Ext TX Key etector e Emphasis AFGen1 Freq 1 0000 MHz AFGen1 Lvl m FM Transmitters FM CDCSS Coding and Deviation Measurements Description This procedure is used to analyze an FM Transmitter s Continuous Digital Coded Squelch System CDCSS digital data stream and frequency deviation The data rate binary data stream and octal code are all displayed on the Test Set screen Knob Data Entry 2 INSTRUMENT STATE Apr SAVE DATA 8 MIC ACC VOLUME SQUELCH AUDIO OUT RF IN OUT ANTENNA RF OUT 67 FM Transmitters Test Set Options Required Decoder Option Measurement Procedure 1 Connect the Transmitter as shown CAUTION The RF present at the Test Set RF IN OUT connector must not exceed 60W continuous or 100 Watts for 10 sec minute On the Test Set 2 P
157. t level at DUPLEX OUT or lt 25 dBm output level at RF IN OUT Harmonics lt 30 dBc Non Harmonic Spurious Residual FM rms CCITT Signal Generator Specifications 60 dBc at gt 5 kHz offset from carrier Frequency HP 8920A HP 8920A Range Standard Opt 050 or HP8920D 250 kHz lt f lt lt 20 Hz lt 7 Hz 249 MHz 249 MHz lt f lt 10Hz lt 4Hz lt 501 MHz 501 MHz lt f lt 20 Hz lt 7Hz lt 1000 MHz SSB Phase Noise Offset 1 GHz HP 8920A HP 8920A carrier Standard Opt 050 or HP 8920D gt 20 kHz lt 110 dBc Hz lt 116 dBc Hz 257 Signal Generator Specifications FM FM Deviation Rates gt 25 Hz 100 kHz for f from 0 25 to lt 249 MHz 50 kHz for f from 249 to lt 501 MHz 100 kHz for f from 501 to 1000 MHz FM not specified for f minus FM dev 250 kHz FM Rate 1 kHz reference Internal DC to 25 kHz 1 dB BW External AC Coupled 20 Hz to 75 kHz typical 3 dB BW External DC Coupled dc to 75 kHz typical 3 dB BW FM Accuracy lt 10 kHz dev 1 kHz rate 7 5 of setting 50 Hz 3 5 of setting 50 Hz with HP 8920A Option 050 or HP 8920D gt 10 kHz dev 1 kHz rate 7 5 of setting 500 Hz 3 5 of setting 500 Hz with HP 8920A Option 050 or HP 8920D FM Distortion THD Noise 0 3 to 3 kHz BW lt 1 0 at gt 4 kHz deviation and 1 kHz rate lt 0 5 at gt 4 kHz deviation and 1 kHz rate HP 8920A O
158. ter for tones from 300 Hz to 10 kHz measured with the gt 99 kHz LPF Resolution 0 1 Distortion SINAD Measurement Fundamental Frequency Range 300 Hz to 10 kHz 5 Input Level Range 30 mV to 30 Vrms Display Range 0 to 60 dB Accuracy 1 dB 0 to 46 dB SINAD for tones from 300 to 1500 Hz measured with the 15 kHz LPF 1 5 dB 0 to 36 dB SINAD for tones from 300 Hz to 10 kHz measured with the 299 kHz LPF Residual THD Noise 60 dB or 150 uV whichever is greater for tones from 300 to 1500 Hz measured with the 15 kHz LPF 57 dBc or 450 uV whichever is greater for tones from 300 Hz to 10 kHz measured with the gt 99 kHz LPF Resolution 0 01 dB 298 Audio Filters AF Analyzer Specifications Standard lt 20 Hz HPF 50 Hz HPF 300 Hz HPF 300 Hz LPF 3 kHz LPF 15 kHz LPF gt 99 kHz LPF 750ps de emphasis 300 Hz to 10 kHz Variable Frequency Notch filter Optional C Message CCITT 400 Hz HPF 4 kHz BPF 6 kHz BPF Audio Detectors RMS RMS SQRT2 Pk Pk Pk hold Pk hold Pk 2 Pk 2 hold Pk max Pk maxhold 299 Oscilloscope Specifications Oscilloscope Specifications 300 Frequency Range 2 Hz to 50 kHz 3 dB BW Scale Division 10 mV to 10 V Amplitude Accuracy 1 5 of reading 0 1 division 20 Hz to 10 kHz Time Division 1 usec to 200 msec Trigger Delay Range 20 usec to 3 2 sec 3 dB Bandwidth Typically gt 100 kHz Internal DC Offset 0 1 div 250 uV div sensitivit
159. ter s maximum specified deviation 64 FM CTCSS Encoder Frequency and Deviation Measurement Description FM Transmitters This procedure is used to measure an FM Transmitter s Continuous Tone Coded Squelch System CTCSS encoder frequency and frequency deviation Both frequency and deviation are read directly off the Test Set screen FM reference is ANSI EIA RS 220 A 3 Knob Keys Data Entry 2 ADRS SAVE 777 INSTRUMENT STATE pata Lo DATA FUNCTIONS E Reeser denk ava wo se u Emm a 5A ABV MIC ACC RF IN OUT DUPLEX OUT l VOLUME SQUELCH AUDIO OUT HI AUDIO IN Arn Lo T d ANTENNA RF OUT SHEILDED AUDIO CABLE MICROPHONE AUDIO INPUT 65 FM Transmitters CAUTION 66 Measurement Procedure 1 Connect the Transmitter as shown The RF present at the Test Set RF IN OUT connector must not exceed 60W continuous or 100 Watts for 10 sec minute On the Test Set 2 Press the PRESET key 3 Press the TX key On the Radio 4 Key the Transmitter and keep keyed until the remaining steps are complet ed On the Test Set using the knob and data entry keys 5 SetFilter 2 to 300 Hz LPF On the Test Se
160. the Receiver s Controls as follows 6 Set power to ON 7 If required set frequency to the same value as step 4 8 Set squelch to minimum 9 Set RF Gain to maximum if equipped 10 Set coded squelch feature if equipped to OFF 11 Set the volume control until noise is at a comfortable level 12 Increase the Receiver s squelch control until audio is just squelched 95 FM Receivers 96 On the Test Set using the knob and data entry keys 13 Slowly increase the Amplitude until squelch just remains open Critical Squelch is displayed as Amplitude as shown e Record this level RX TEST Sa AC Level f x 20 34 Avg Ref RF Gen Freg AFGent Freq AFGen2 Freg Filter 1 To Screen Squelch Sensitivity Amplitude AFGeni To AFGen2 To Filter 2 EET FM iSkHz HPF UV oii Atten Hold Ext Load R 14 Decrease Amplitude until the Receiver s squelch just closes e Record this level Calculate the measurement 15 Critical Squelch Hysteresis is the difference between the two readings On the Radio set the Receiver s Controls as follows 16 Set the Receiver s squelch control to maximum On the Test Set using the knob and data entry keys 17 Increase Amplitude until the Receiver s squelch just opens e Record this level 18 Record the maximum squelch sensitivity is displayed as Amplitude as shown 19 Decrease Amplitude until the Receiver s squelch just closes e Recor
161. ther communications systems Test and troubleshooting time is decreased by simplifying standard measurement tasks and providing the required measurement capability in a single instrument Transmitters and receivers are characterized with single key RX TX and duplex tests Each of these tests displays a specialized screen that provides access to the necessary controls and measurement results Measured results may be displayed as digital readouts and or bar graphs All settings and measurements are easily accessed and changed using the front panel knob and keys If desired all settings can be saved in nonvolatile save recall registers for future access The various ports on the Test Set allow the receiver transmitter being tested to be quickly connected A receiver with 2 uV sensitivity typically 1 uV is available through the ANT IN port for off the air monitoring of low level signals Transmitter measurements of high power signals of up to 100 W intermittently for 10 seconds or 60 W continuous can be performed without the use of external attenuators 25 Product Description Features The features currently available for the Test Set include e Synthesized AM FM signal generator to 1000 MHz Function generator HP 8920A option e AM FM modulation analyzer e Duplex offset generator e Signalling encoder and decoder HP 8920A option e SSB demodulator e RF power meter RF frequency counter frequency error meter e Audio frequ
162. type size or rating than supplied with the instrument can cause a fire hazard and or electrical shock 245 Preparing the Test Set for DC Operation Preparing the Test Set for Operation 1 Verify that the instrument is connected and configured to the appropriate power source NOTE Because most parameters are saved when power is removed setting configuration is NOT necessary every time power is applied to the Test Set Perform these procedures only if changes to the fields are required 2 Turn the Test Set POWER ON in After approximately 15 seconds verify that the CRT screen displays All self tests passed and that the RX TEST screen is displayed 3 Press the CONFIG key to display the CONFIGURE screen 3 4 246 RFGen Volts FIBETTTERTE Range Hold Auto All Hold All StatetAuta Hatch Courl RFGenl Hone RATA Cntl Intensity CE a Carrier PTI Beeper RF Offset 1 RE tGen Rnl Lou Battery 2 MHz IEDFETI Vno v Tine Pesce HH HM CONFIGURE RF Display Frea Chan RF Chan Std MS AMPS User Def Base Frea MHz Chan Space kHz Gen IRn1 45 MHz RF Level Offset n Aft RF In Out dB Duplex Qut dB Antenna In dB Firmware B 0i 0l Total RAM 928 kB Serial No 2324R00136 To Screen RF GEN RF ANL RF AHL OPE AHL ENCODER DECODER RADIO INT SERVICE More cnfgscrn wmf Preparing
163. ude until the Receiver s squelch just closes e Record this level Calculate the reading 27 Maximum Squelch Hysteresis is the difference between the two readings 185 SSB Receivers 186 Spectrum Analyzer Measurements 187 Introduction Introduction Each procedure may contain the following information e A brief measurement overview and a reference to applicable TIA EIA spec ifications for each test e A list of the Test Set options and additional test equipment required to per form the procedure e Any special test considerations that need to be considered for safety mea surement accuracy etc e Step by step procedures required to perform each measurement with illus trations Refer to Configuring for Measurements on page 243 or the Test Set s User Guide on preparing the Test Set for operation 188 List of Measurements List of Measurements Spectrum Analyzer Measurements Measuring Transmitter High Low Power Signals on page 191 Field Strength Measurements on page 196 Analyzing External Transmitter Inter modulation Distortion on page 200 Tracking Generator Measurements Basic Measurements with the Tracking Generator on page 206 Antenna Return Loss VSWR Measurement amp Tuning on page 210 1 4 Wave Coaxial Filter Tuning Swept on page 214 Cable Fault Locations on page 218 Passive Cavity Insertion and Return Loss Measurement on page 222 Repeater System Effe
164. ure ment on page 87 FM 20 dB Quieting Sensitivity Measurement on page 91 FM Critical and Maximum Squelch Sensitivity Measurement on page 94 FM CTCSS Sensitivity and Bandwidth Measurement on page 97 FM CDCSS Sensitivity Measurement on page 101 FM Audio Frequency Response Measurement on page 105 FM Audio Distortion Measurement on page 108 FM Spurious Response Attenuation Measurement on page 111 51 FM Transmitters FM Transmitters The following measurements are provided for testing FM Transmitters The procedures are arranged in the order that tests are typically per formed 52 FM Transmitters FM Off The Air Monitoring Determining Unknown Transmitter Carrier Fre quency NOTE Description This procedure is used to locate demodulate and measure an FM signal s output carrier frequency The low level signal is input to the front panel ANT IN connector located then demodulated using the spectrum analyzer function For performing an FM Off the Air Monitoring on a Known Transmitter Carrier Frequency see page 55 If attempting to determine the unknown frequency of a Transmitter connected to the RF IN OUT connector see Output Power Deviation and Frequency or Frequency Error Measurement provided later in this chapter for the measurement procedure Knob Data Entry 2 Keys SCREEW CONTROL INSTRUMENT STATE
165. us or Harmonic Level amp Frequency 78 FM Receivers FM Receivers The following measurements are provided for testing FM Receivers The procedures are arranged in the order that tests are typically per formed 79 FM Receivers FM Audio Output Power Measurement Description This procedure is used to measure an FM Receiver s maximum audio output power or rated output power into a Test Load Output power is displayed in various measurement units including watts on the Test Set screen The FM reference is RS 204D and RS 316B 3 Knob Data Entry 2 Keys SSS sCREEN CONTROL 7 INSTRUMENT STATE y msie HELP CONFIG HOLD PRINT DATA HUNCTIONS me _7 Ls Lo e HI LIMIT CURSOR CONTROL a paa Lamy E Z cance e MIC ACC VOLUME SQUELCH AUDIO OUT RF IN OUT 50Q COXIAL SPEAKER CABLE AUDIO INPUT ANTENNA RF INPUT 80 FM Receivers Additional Equipment Test Load Required Special Test Considerations See Receiver Test Loads on page 46 Measurement Procedure 1 Connectthe Receiver as shown On the Test Set 2 Press the PRESET key 3 Press the RX Key Using the knob and data entry key
166. ve AM Receivers AM Spurious Response Attenuation Measurement Description This procedure is used to measure an AM Receiver s spurious response attenuation the receiver s ability to prevent unwanted signals from causing response in the audio output A reference is established and high level modulated signals from 1 MHz to 1000 MHz or as required are input to the Receiver while audio output response is measured 3 Knob Data Entry 2 Keys SCREEN CONTROL INSTRUMENT STATE Missa x corG HOLD PRINT ADRS SAVE USER kt DATA FUNCTIONS DATA REFSET METIR AVG AAA 7 s 9 E am L 4 l5 6 CURSOR QONTROL Y 5 mcm C mc curd od x rst TO SELECT 0 ilv E mm mm mS mM ems ior 087 re MIC ACC VOLUME SQUELCH AUDIO OUT RF IN OUT DUPLEX OUT ANTIN e PELLE Ars COMBINER SHEILDED ADUIO CABLE TO SIGNAL y SPEAKER 1 GENERATORS ANTENNA RF INPUT AUDIO RF OUTPUT OUTPUT 155 AM Receivers Additional Equipment Signal Generator HP 8647A and a Power Splitter Com Required biner HP 11636A CAUTION 156 Measurement Procedure Before connecting the Signal Generator set RF Output power to OFF or maximum attenuation 1 Connect the Receiver
167. ve over the frequency range of 300 to 3 kHz RX TEST SI NN EM AC Level Audio E 3 3 1 3 0 0 07 24 inda Frequency e Response To Screen RF Gen Freq 28 310000 _ MHz Amplitude be HO Atten Hold On Off Output Port RF Out Dupl AFGen1 Freq 0 5000 Hz AFGen1 To AFGen2 Freq 1 0000 Hz AFGen2 To FM 15kHz HPF Off Ext Load R EXT i 151 AM Receivers AM Audio Distortion Measurement Description This procedure is used to measure an AM Receiver s audio distortion Distortion is measured at full rated audio output and 17 dB below full rated audio output Measurement is read directly from the Test Set screen 3 Knob Data Entry 2 Keys C7 SCREEN CONTROL INSTRUMENT STATE fy msie HELP coNEG HOLD PRINT ADRS SAVE D DATA HUNCTIONS EFSET METER c CURSOR CONTROL By s E ome o 9 E E MIC ACC VOLUME SQUELCH AUDIO OUT RF IN OUT DUPLEX OUT 500 COXIAL CABLE SPEAKER AUDIO INPUT ANTENNA RF OUT 152 AM Receivers Additional Equipment Test Load Required Special Test Considerations See Receiver Test Loads on page 46 Measure
168. y Spectrum Analyzer Specifications Option 102 Spectrum Analyzer Specifications Option 102 Frequency Frequency Range 400 kHz to 1 GHz Frequency Span Resolution Bandwidth coupled Table 7 Span Bandwidth lt 50 kHz 300 Hz lt 200 kHz 1 kHz lt 1 5 MHz 3 kHz lt 18 MHz 30 kHz gt 18 MHz 300 kHz Full span Display Log with 10 dB div 2 dB div or 1 dB div Display Range 80 dB Reference Level Range 50 to 50 dBm Residual Responses 70 dBm no input signal 0 dB attenuation Image Rejection gt 50 dB Non harmonic Spurious Responses gt 70 dB for input signals lt 30 dBm Level Accuracy 2 5 dB Displayed Average Noise Level 114 dBm for 50 kHz spans Log Scale Linearity 2 dB for input levels lt 30 dBm or 60 dB range 301 Spectrum Analyzer Specifications Option 102 Tracking Generator Included with Option 102 Frequency Range 400 kHz to 1 GHz Frequency Offset Frequency span endpoints frequency offset cannot be lt 400 kHz or 2 1 GHz Output Level Range Same as signal generator Sweep Modes Normal and inverted Adjacent Channel Power Included with Option 102 Relative Measurements Level Range Antenna In 40 dBm to 20 dBm RF Input 0 16 mW 8 dBm to 60 W 47 8 dBm continuous or up to 100 mW 50 dBm for 10 seconds minute Dynamic Range Typical values for channel offsets Table 8 Channel

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