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User`s and Service Guide

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1. RF NETWOR PLUG IN ANALYZER SWEEP OSCILLATOR DETECTOR UNDER TEST pc4l4a_e Figure 4 1 Setup for 85025A B D E Return Loss Test 1 Connect the equipment as shown in Figure 4 1 leaving the directional bridge TEST PORT unconnected 2 Press on the analyzer This will reset both the network analyzer and the sweep oscillator the source Allow 30 minutes for warmup 3 On the source press START 10 MHz STOP 40 MHz 4 On the RF plug in press and adjust the output power with the power level knob for a 3 dBm power level indication 4 6 Performance Tests Agilent 85025A B D E 5 On the analyzer press CHAN 2 OFF to switch channel 2 OFF Press FUNCTION A Press FUNCTION REF REF POSN then use the step keys or the knob to move REF POSN one line down from the top of the CRT graticule 6 On the analyzer press FUNCTION AUTO SCALE Calibrating the Scalar Network Analyzer 7 On the analyzer press FUNCTION SHORT OPEN Follow the directions prompts appearing on the CRT a Connect the short to the TEST PORT of the directional bridge then press STORE SHORT on the analyzer Remove the short b Connect the open to the TEST PORT of the directional bridge then press STORE OPEN on the analyzer Remove the open The CRT will display SHORT OPEN CAL SAVED IN CH1 MEM 8 Press FUNCTION MEAS MEM 9 Connect th
2. 50 0 GHz 4 28 Performance Tests Agilent 85025A B D E 85025A B D E Detector Performance Test Record 5 of 9 85025A B E Absolute dB Error Versus Frequency ABSOLUTE dB ERROR vs FREQUENCY dB ERROR o 0 4 8 12 16 20 24 ZD 2 FREQUENCY in GHz pc421a_e 85025D Absolute dB Error Versus Frequency ABSOLUTE dB ERROR vs FREQUENCY x a pe S LU en i 0 4 8 12 16 20 24 28 32 36 40 44 48 FREQUENCY in GHz pce422a_e Agilent 85025A B D E Performance Tests 4 29 85025A B D E Detector Performance Test Record 6 of 9 Absolute Power Accuracy in DC Mode 1 2 3 4 5 6 7 8 9 Nominal Nominal Nominal CAL CAL CAL PWR MEAS Dynamic Upper Limit PWRLVL 120 4B 12dB ATTEN ATTEN LVL dBm PWR ACCY 85025A B D E dBm ATTEN ATTEN 120 dB 12 dB 16 dBm LVL Error unless noted Setting Setting ATTN ATTN CAL Cursor dBm otherwise dB dB ATTN dBm 0 10 6 REF REF 16 0 0 0 70 1 09 13 0 3 0 612 0 76 10 0 6 0 52 6 10 0 0 40 3 10 3 0 40 0 10 6 REF REF 3 10 9 0 40 6 20 2 0 40 10 20 6 0 40 13 20 9 0 40 164 30 2 0 40 20 30 6 0 40 2545 40 1 0 40 3045 40 6 0 40 3546 50 1 0 40 40 6 50 6 0 70 4547 60 1 1 0 5047 60 6 1 3 1 Upper limit does not include measurement uncertainties 2 85025A B only 3 85025D E only 4 Smoothing ON 5 Averaging ON Averaging
3. M maintenance 7 5 cleaning the connectors 8 2 gaging the input connector 8 2 mechanical inspection 8 1 visual inspection 8 2 mat use 2 2 module exchange program 6 3 O operating environment 1 9 ordering parts 6 1 P packaging 1 9 parts ordering 6 1 performance test record 4 25 33 absolute power accuracy response 4 29 alternate power accuracy tests 4 31 dynamic accuracy response 4 30 frequency response 4 27 input connector mechanical tolerances 4 32 performance tests 3 8 equipment required 4 1 frequency response 4 9 15 Index 1 frequency response computing maximum error 4 14 frequency response detector characterization 4 14 frequency response equipment required 4 11 frequency response error analysis 4 10 frequency response procedure 4 13 4 15 frequency response source characterization 4 14 frequency response specifications 4 13 frequency response system configuration 4 13 power accuracy 4 15 24 power accuracy absolute power in DC mode 4 17 power accuracy alternate procedure 4 21 power accuracy dynamic accuracy in AC mode 4 20 power accuracy equipment required 4 16 power accuracy procedure 4 17 return loss 4 3 return loss failure 4 9 return loss procedure 4 3 8 return loss specifications 4 3 power requirements 2 3 product description 1 1 program listing 9 1 automated cal factor entry program 9 2 automated frequency response test 9 1 Index 2 example
4. Figure 3 1 Detector Features Operating Theory The 85025A B D E can detect either unmodulated RF signals in DC mode or square wave amplitude modulated RF signals in AC mode In either AC or DC detection mode the detector provides a 27 778 MHz square wave signal for the analyzer to interpret and display In AC detection mode and RF or microwave signal is amplitude modulated with a 27 778 MHz square wave The detector demodulates envelope detects this signal to produce a 27 778 MHz signal with a peak to peak voltage that corresponds to the magnitude of the RF signal at the detector input In DC detection mode no modulation is required The detector diode in the 85025A B D E converts the RF signal into an equivalent DC voltage The detector chops the DC voltage at a 27 778 kHz rate and this chopped signal is then amplified The amplified signal simulates the signal produced by AC detection 3 2 Operation Agilent 85025A B D E Measurement System Configuration With an 8757 series scalar network analyzer using an 85025A B D E detector system configuration requires special attention AC mode is the default state of the analyzer system and there are no further requirements to initiate a measurement However to enable DC mode operation a series of keystrokes is required DC Detection mode DC detection offers greater power measurement accuracy and the ability to characterize oscillators and modulation sensitive devices Figure
5. 4 13 4 13 4 14 4 14 4 14 4 15 4 15 4 15 4 16 4 17 4 17 4 20 4 21 4 21 4 22 4 23 4 24 4 25 Contents 2 Agilent 85025A B D E Adjustments Replaceable Parts How To Order Parts Fast Service REPA dario AAA E ET N R Bs Removing the Covers Procedure a a a NRT RRR N Replacing the Detector Replacing the Cable Assembly Replacing the Connectors Detector Maintenance Mechanical Inspection 2 2 2 2 248 Inspecting the Connectors Visual Examination aoaaa a a Cleaning the Connectors aoao a a a a a a Connector Cleaning Kit Gaging Connectors o aooo e a a a e Gaging Connectors to be Mated with the 85025A B D E Type N female 2 2 2 00484 Precision7mm 040484 Precision 3 5 mm female Automated Program Listing Automating the Frequency Response Test Cal Factor Entry Program 2 Running the Cal Factor Entry Program Detector Frequency Response Program Running the Detector Frequency Response Program Measurement Setup o Example Programs 2 050884 Index Agilent 85025A B D E T tS 9 1 tae te Te e 9 2 sagt cg 9 2 ah C 9 3 e 9 3 a a 9 5 Ph tak ek 9 5 Contents 3 Figures 1 1 85025A B D E Detector o 1 2 2 1 Example of a Static Safe Work Station 0
6. non warranted detector characteristics when used with one of the above mentioned analyzers Note Specifications describe the instrument s warranted performance over the temperature range of 25 C 5 C Table 1 2 85025A B D E Detector General Specifications Dynamic Range on all 8757 Series analyzer s detector inputs AC mode 16 to 55 dBm DC mode 16 to 50 dBm Nominal Impedance 500 Maximum Input Power 20 dBm 100 mW 10 VDC Agilent 85025A B D E General Information 1 3 Table 1 3 85025A Detector Specifications including Option 001 Frequency Range 0 01 to 18 GHz Return Loss 10 MHz to 40 MHz 10 dB 40 MHz to 4 GHz 20 dB 4 GHz to 18 GHz 17 dB Frequency Response in DC mode input power 10 dBm 10 MHz to 40 MHz 0 25 dB 0 75 dB 40 MHz to 18 GHz 0 5 dB Absolute Power Accuracy in DC mode 50 MHz calibrated at 0 dBm ec 1 4 L J 20 ES IES A v of 86 Z 4 2 0 20 10 0 10 20 30 40 50 60 Power dBm pc42a_e Dynamic Power Accuracy AC Mode 50 MHz Calibrated at OdBm T 1 4 v ga T E 1 0 n 8 of 6 sw 4 EE 0 20 10 0 10 20 30 40 50 60 Change in Power dB pe43a_e 1 4 General Information Agilent 85025A B D E Table 1 4 85025B Detector Specifications Frequency Range 0 01 to 26 5 GHz Return Loss 10 MHz to 40 MHz 10 dB 40 MHz to
7. 1230 1240 1250 1260 1270 1280 1290 1300 1310 1320 1330 1340 1350 1360 1370 1380 1390 1400 1410 1420 1430 1440 1450 1460 1470 1480 1490 1500 1510 UNTIL Sts 80 SUBEND SUB Zero_mtr COM Hpib Sna Source Pwr_mtr DISP STAND BY zeroing power meter OUTPUT Pwr_mtr A1 R WAIT 7 OUTPUT Pwr_mtr Z1i R OUTPUT Pwr_mtr 9D V WAIT 7 DISP SUBEND SUB Verify measures detector response COM Cal_f Cal INTEGER Pm_points COM Measure Meas Set_power Start Stop Scale INTEGER Points COM Hpib Sna Source Pwr_mtr INTEGER I Clear_screen OUTPUT Sna C2 CO C1 IA ME FDO MD1 SWO AF1 BEEP 500 1 DISP Select AC or DC mode A or D Default AC INPUT Answ IF Answ 1 1 d OR Answ 1 1 D THEN OUTPUT Sna DMO MDO ELSE OUTPUT Sna DM1 MD1 END IF BEEP 400 01 DISP CONNECT DETECTOR TO ATTEN AND TO INPUT A PAUSE I ALPHA OFF Graticule GRAPHICS ON PEN 1 OUTPUT Source PL Set_power DB RF1 FOR I 1 TO Points OUTPUT Source CW Meas I 1 MZ Agilent 85025A B D E Automated Program Listing 9 11 1520 1530 1540 1550 1560 1570 1580 1590 1600 1610 1620 1630 1640 1650 1660 1670 1680 1690 1700 1710 1720 1730 1740 1750 1760 1770 1780 1790 1800 1810 1820 1830 1840 1850 1860 1870 1880 1890 1900 1910 WAIT 3 OUTPUT OSna 0V ENTER Sna Meas I 3 Db_err Meas 1 3 Meas 1 2 IF I 1 THEN MOVE Meas 1 1 Db_err PLOT Meas 1 1 Db_err N
8. 2 OFF INSTRUMENT STATE MODE DC Next press CONFIG SYSTEM DC DET ZERO MANUAL CONT DET OFFSET A 0 48 5 Connect the detector to the power meter POWER REF output 6 Switch the POWER REF output ON 7 On the analyzer press AUTO SCALE CURSOR Note the reading On the analyzer press DET OFFSET A Using the ENTRY keys enter the value opposite in sign to the reading noted above 8 On the analyzer press CURSOR The display should indicate a power level of 0 00 dBm If not repeat the detector zero and offset calibration until a 0 00 dBm power level is obtained steps 4 through 7 9 Set the 10 dB step attenuator to 10 dB 10 Connect the DUT to the attenuated output 11 On the source switch square wave modulation OFF Set a CW frequency of 50 MHz 12 Refer to the Performance Test Record for the CAL PWR LVL computed at nominal 0 dBm Adjust the output power to the CAL PWR LVL 13 Note the cursor value displayed on the CRT Record this value in column 7 of the Performance Test Record 14 Set the attenuators for the next nominal PWR LVL Continue the procedure as outlined in steps 9 through 13 of the Absolute Power Accuracy in DC Mode Performance Test for each of Nominal PWR LVLs listed on the Performance Test Record Nominal 55 dBm is for AC Test only Agilent 85025A B D E Performance Tests 4 23 Dynamic Accuracy in AC Mode Alternate Procedure 15 16 17 18 19 20 21 22 Repeat steps 1 and 2
9. 3 2 depicts a typical measurement setup for 0 01 to 50 GHz using an Agilent 8350B sweep oscillator RF plug in as the source 1 On the analyzer press PRESET Connect the detector s 2 DC detection mode must be selected On the analyzer press SYSTEM and select MODE DC When the MODE DC softkey is selected the source s square wave modulation is automatically switched OFF Accurate DC Measurements Zeroing the Detector When you make DC detection measurements it is important to perform this detector zeroing procedure to compensate for the effects of DC drift and temperature fluctuations This zeroing procedure eliminates small DC voltages from the diode detector that would otherwise cause amplitude measurement errors at low lt 40 dBm power levels Zeroing also establishes the displayed noise level with no RF signal applied the system s noise floor Autozero Pressing the autozero softkey AUTOZRO switches OFF the source RF signal output and automatically zeros the detector Agilent 85025A B D E Operation 3 3 The repeat autozero function softkey REPT AZ ON OFF periodically repeats the autozero You must use a GPIB interfaced sweeper to take advantage of this function because the analyzer must be able to switch OFF the RF output of the sweeper to perform the autozeroing Manual Zero Manual zero represented by the MANUAL softkey is similar to zeroing a power meter 1 Remove the RF signal from the detector
10. C D Bandpass filter any within the frequency range of the sweeper Sweep oscillator any compatible with the 8757 series scalar network analyzer BNC cables 3 required part number 8120 1839 3 6 Operation Agilent 85025A B D E Procedure POS Z BLANK POS Z BLANK STOP SWEEP STOP SWEEP SWEEP IN 0 10V SWEEP OUT IN SCALAR NETWORK ANALYZER SWEEP OSCILLATOR 8757 SYSTEM INTERFACE RF PLUG IN HP INTERFACE BUS DETECTOR UNDER TEST pe413a_e Figure 3 3 Operator s Check Equipment Setup 1 Connect the equipment as shown in Figure 3 3 with the detector connected to input A on the analyzer Form a thru connection by connecting the detector s RF input to the RF output of the source Switch all of the instruments line powers ON and allow them to warm up 2 If the 8757 series analyzer s system interface is not engaged the analyzer s status line displays SYSINTF OFF press MORE SWEEP MODE SYSINTE ON 3 On the analyzer press PRESET The analyzer s channel 1 should be active and measuring input A 4 Adjust the STOP and START frequencies on the source to include the frequency range of the device under test the bandpass filter Agilent 85025A B D E Operation 3 7 5 Switch OFF the analyzer s channel 2 by pressing CHANNEL 2 twice 6 On the analyzer press CURSOR MAX to place t
11. MHz bandpass filter a nn anaana aaa Part Number 08757 80027 EEO A a E E eee eee EH EE E EEE 8491B Calibrated 10 dB step attenuator 0 355D Option 001 H88 Calibrated 1 dB step attenuator 000 355C Option 001 H88 Power meter DC mode only 0 0 RE K 436A or 438A AD APLOLS seas RRR a LEER oe atin ah eee ge RET Rh ea aa the ca dd as required Agilent 85025A B D E Performance Tests 4 21 POS Z BLANK POS Z BLANK STOP SWEEP STOP SWEEP SWEEP IN O 10V SWEEP OUT IN SCALAR aes SWEEP OSCILLATOR 8757 SYSTEM g INTERFACE E a E HP INTERFACE BUS PLUG IN FILTER ATTENUATOR 10dB 1dB STEP STEP DETECTOR ATTENUATOR ATTENUATOR UNDER TEST pe420a_e Figure 4 5 Power Accuracy Alternate Test Setup Procedure 1 Connect the equipment as shown in Figure 4 5 Allow 30 minutes warmup time 4 22 Performance Tests Agilent 85025A B D E 2 For each of the nominal power levels specified in the Performance Test Record Alternate Procedure calculate the Calibrated Power Level Refer to steps 2 and 3 in the Absolute Power Accuracy in DC Mode Performance Test for details Change all 16 dBm references to 10 dBm Absolute Power Accuracy in DC Mode Alternate Procedure 3 Do not connect the detector to the attenuated output 4 On the analyzer press CHAN
12. Set_power 2 Power level set point of source in dBm Scale 2 dB graph limits U IF NOT Cal_data_flg THEN get cal data on power sensor DISP ENTER THE POWER SENSOR SERIAL LAST 5 DIGITS BEEP 700 1 INPUT Serial DISP LOADING CAL FACTORS ASSIGN File TO PM_ amp VAL Serial ENTER File Pm_points Cal Load cal factors ASSIGN File TO Cal_data_flg 1 DISP END IF BEEP 500 1 DISP ENTER NUMBER OF POINTS TO BE MEASURED Max_points MAX INPUT Points Step_size Stop Start Points 1 9 8 Automated Program Listing Agilent 85025A B D E 390 400 410 420 430 440 450 460 470 480 490 500 510 520 530 540 550 560 570 580 590 600 610 620 630 640 650 660 670 680 690 700 710 720 730 740 750 FOR I 1 TO Points Meas I 1 Start Step_size I 1 NEXT 1 REMOTE 7 OUTPUT Sna IP PT19 preset system CALL Set LOOP CALL Verify BEEP 300 1 DISP To repeat press CONTINUE to re cal RUN PAUSE U END LOOP END 1 Pee SUB PROGRAMS aooo kkk U SUB Corr_pwr Freq Power uses cal factor to find actual power read COM Cal_f Cal INTEGER Pm_points IF Freq lt Cal 1 1 THEN freq too low use first value Cal_factor Cal 1 2 GOTO Act_pwr END 1F X 0 REPEAT X X 1 IF X gt Pm_points THEN freq too high use last value Cal_factor Cal Pm_points 2 GOTO Act_pwr END IF UNTIL Freg lt Cal X 1 Frac Freq Cal X 1 1 Ca1 X 1 Cal X 1 1 Cal_factor Frac Cal X 2 Cal X 1 2 Cal
13. po Replacement 85025A Detector Type N Replacement 85025A Option 001 Detector 7 mm Replacement 85025B Detector 3 5 mm Replacement 85025D Detector 2 4 mm Replacement 85025E Detector 3 5 mm 85025A Connector Repair Kit Type N 85025A Option 001 Connector Repair Kit 7 mm 85025B Connector Repair Kit 3 5 mm 85025D Connector Repair Kit 2 4 mm 85025E Connector Repair Kit 3 5 mm Label Serial Number Label Warning Max Input Cable Assembly W1 Cover Plastic Half Body Screw Machine M2 5 x 0 45 4 mm LG Washer Lock 2 5 mm Cable Marker Kit Cable 25 foot Cable 200 foot 85025 69018 85025 69019 85025 69020 85025 69024 85025 69025 85025 60021 85025 60022 85025 60023 85025 60026 85025 60027 Not Available 85025 80001 85025 60003 85025 40001 0515 0061 2190 0583 5061 1044 11679A 11679B 6 2 Replaceable Parts Agilent 85025A B D E The module exchange program described here is a fast efficient economical method of keeping your Hewlett Packard Locate defective module Is a replacement module on hand Order restored exchange module from HP Refer to the replaceable parts section for part numbers Swap replacement mod ule and defective module Return defective module to HP Install the replacement module Keep the defec tive module for return to HP Order restored exchange module from HP Refer to the replaceable parts section for part numbers Put restored exchang
14. s RF input 2 On the analyzer press MANUAL to perform the zeroing Refer to Operation in the Agilent Technologies 8757C E Scalar Network Analyzer Operating Manual or Agilent Technologies 8757D Scalar Network Analyzer Operating Manual for detailed information on these and other softkeys In the DC mode the 85025A B D E is specified for absolute power level accuracy In regard to these specifications the following conditions apply m The equipment has had a 30 minute warmup period m The detector zeroing procedure has been performed a The offset has been adjusted with a calibrated 0 dBm 50 MHz signal applied m Trace averaging is enabled on the analyzer at low power levels as required m The source harmonics are below 40 dBc m The source SWR is 1 0 To increase the accuracy of absolute power level measurements select DET OFFSET to properly set the system response to a 0 dBm signal After zeroing the detector follow these steps to set the detector offset 1 On the analyzer press DET OFESET DET A or the appropriate input port Press 0 4B This ensures the 0 dB offset 2 Connect the detector to the POWER REF output of a calibrated power meter such as an Agilent 436A or 438A Switch the POWER REF output ON 3 Press AUTOSCALE 4 Press CAL MORE DET OFFSET 3 4 Operation Agilent 85025A B D E 5 Press DET A or the appropriate input port and use the entry keys to enter the value opposite in sign to the
15. together or separately a A conductive table mat and wrist strap combination a A conductive floor mat and heel strap combination Building Ground S 1 MegOhm Z Resistor q vy S Mat Wrist Stra y L Building Ground rist Strap Cord L 1 MegOhm A Resistor Ey _ AS Strap f AN I Floor Mat FORMAT46 Figure 2 1 Example of a Static Safe Work Station 2 2 Installation Agilent 85025A B D E Static Safe Practices m Before cleaning inspecting or making a connection to a static sensitive device or test port ground yourself as far as possible from the test port m Discharge static electricity from a device before connecting it Touch the device briefly through a resistor of at least 1 MQ to either the outer shell of the test port or another exposed ground This discharges static electricity and protects test equipment circuitry Power Requirements The scalar network analyzer supplies power for the detector Mating Connectors Table 1 7 lists connector mechanical tolerances Microwave Connector Care part number 08510 90064 provides information on the proper maintenance inspection and gaging of connectors Connecting the Detector 1 The 85025A B D E cables plug into the connectors on the front panel of the 8757 series scalar network analyzer With the cable plug key downward insert the multi pin DC connector into the A input on the front
16. 2 2 2 2 3 1 Detector Features e 3 2 3 2 Typical System Setup for 0 01 to 50 GHz Measurements 3 5 3 3 Operator s Check Equipment Setup 2 2 3 7 4 1 Setup for 85025A B D E Return Loss Test 4 6 4 2 85025A B E Return Loss 0 04 GHz to Maximum Frequency 4 8 4 3 Frequency Response Measurement Setup 2 4 12 4 4 Absolute Power Accuracy Test Setup 2 2 4 17 4 5 Power Accuracy Alternate Test Setup 4 22 6 1 Module Exchange Program 2 4 6 3 7 1 Removing the Detector Covers 4 7 2 7 2 Cable Connections 7 5 9 1 Typical Program Output 2 ee ee es 9 4 Contents 4 Agilent 85025A B D E Tables Agilent 85025A B D E 85025 Series Detector Descriptions 2 2 85025A B D E Detector General Specifications 85025A Detector Specifications including Option 001 85025B Detector Specifications ww da 24 85025D Detector Specifications 2 2 a a LM 85025E Detector Specifications 85025A B D E Detector Supplemental Characteristics ae 1 Equipment Required for Operator s Check Recommended Equipment 48 85025A B Return Loss with Measurement Uncertainty 85025D Return Loss with Measurement Uncertainty 85025E Return Loss with Measurement Uncertainty Approximate Error Analysis at 18 GHz for 85025
17. 3 of 9 Test Measured Measurement Description Specification Results Uncertainty 85025A B Return Loss 10 MHz to 40 MHz gt 10 dB 1 4 dB 0 04 GHz to 4 0 GHz gt 20 dB 1 1 dB 4 GHz to 18 GHz gt 17 dB 1 4 dB 18 GHz to 26 5 GHz gt 12 dB 1 1 dB 85025D Return Loss 10 MHz to 40 MHz gt 10 dB 0 5 dB 0 04 GHz to 0 10 GHz gt 20 dB 2 5 dB 0 10 GHz to 14 GHz gt 23 dB 3 2 dB 14 GHz to 34 GHz gt 20 dB 3 2 dB 34 GHz to 40 GHz gt 15 dB 2 1 5 dB 40 GHz to 50 GHz gt 9dB 2 1 5 dB 85025E Return Loss 10 MHz to 40 MHz gt 10 dB 1 4 dB 0 04 GHz to 0 1 GHz gt 20 dB 1 1 dB 0 1 GHz to 25 GHz gt 25 dB 1 4 dB 25 GHz to 26 5 GHz gt 23 dB 1 1 dB 1 Using the equipment and procedures documented in this manual 2 85025B only Agilent 85025A B D E Performance Tests 4 27 85025A B D E Detector Performance Test Record 4 of 9 Frequency Response Test Frequency Recommended Actual Source Step 11 Detector Step 17 Difference Step 18 0 01 GHz 2 00 GHz 4 00 GHz 6 00 GHz 8 00 GHz 10 0 GHz 12 0 GHz 14 0 GHz 16 0 GHz 18 0 GHz 20 0 GHz 21 0 GHz 22 0 GHz 23 0 GHz 24 0 GHz 25 0 GHz 26 0 GHz 26 5 GHz 28 0 GHz 30 0 GHz 32 0 GHz 34 0 GHz 36 0 GHz 38 0 GHz 40 0 GHz 42 0 GHz 44 0 GHz 46 0 GHz 48 0 GHz
18. 4 GHz 20 dB 4 GHz to 18 GHz 17 dB 18 GHz to 26 5 GHz 12 dB Frequency Response in DC mode input power 10 dBm 10 MHz to 40 MHz 0 25 dB 0 75 dB 40 MHz to 18 GHz 0 5 dB Absolute Power Accuracy in DC mode 50 MHz calibrated at 0 dBm 1 6 1 4 L Ta m aS 1 0 ae 8 oe 6 Z u 4 AD 0 20 10 0 10 20 30 40 50 60 Power dBm pc44a_e Dynamic Power Accuracy AC Mode 50 MHz Calibrated at OdBm TE 1 4 k T T 6S 1 0 al 8 SE a Z 4 a 0 20 10 o 10 20 30 40 50 560 Change in Power dB pc4 5a_e Agilent 85025A B D E General Information Table 1 5 85025D Detector Specifications Frequency Range 0 01 to 50 GHz Return Loss 10 MHz to 40 MHz 10 dB 40 MHz to 100 MHz 20 dB 100 MHz to 14 GHz 23dB 14 GHz to 34 GHz 20 dB 34 GHz to 40 GHz 15 dB 40 GHz to 50 GHz 9 dB Frequency Response in DC mode input power 10 dBm 10 MHz to 40 MHz 0 25 dB 0 75 dB 40 MHz to 20 GHz 0 5 dB 20 GHz to 26 5 GHz 1 0 5 dB 26 5 GHz to 40 GHz 2 5 0 5 dB 40 GHz to 50 GHz 3 0 0 5 dB Absolute Power Accuracy in DC mode 50 MHz calibrated at 0 dBm de 6 Ce Ae C m uw PF 0 8 sy abil dde DO 16 10 0 10 20 30 40 50 60 Power dB pc46a_e Dynamic Power Accuracy AC Mode Mode 50 MHz Calibrated at OdBm 7 1 6 PA 1 2 co
19. 5025A B D E Automated Program Listing 9 3 Note If using DC mode zero the detector before measuring the DUT response A sample displayed output of the program is shown in Figure 9 1 If the displayed frequency response exceeds the limits of the graph increase the value of Scale variable controlling the scale size in line 210 ABSOLUTE dB ERROR vs FREQUENCY dB ERROR o 0 4 8 TZ 16 FREQUENCY in GHz pc427a_e Figure 9 1 Typical Program Output 9 4 Automated Program Listing Agilent 85025A B D E Measurement Setup Connect the equipment as shown in Figure 4 3 Connect the GPIB cables from the controller to the GPIB inputs of both the power meter and scalar network analyzer Ensure that a system configuration and detector zero have been performed The GPIB addresses are as follows m Network analyzer 716 m Source 19 connected to the analyzer s System Interface Bus not the controller s GPIB m Power meter 713 A printer may be connected to the GPIB at address 701 if a printout is required The printer must be capable of performing a graphics dump Example Programs The following programs can be used to automate the power meter CAL factor entry and the Frequency Response Performance Test 10 POWER METER CAL FACTOR ENTRY PROGRAM 20 Creates 2 dim array of freq in MHz vs cal factor in percent 30 Assigns a file name of PM_xxxxx xxxxx is the pwr sensor serial 40 50 OPTION
20. A B E Detectors Approximate Error Analysis for the 85025D Detector 6 1 85025A B D E Replaceable Parts and Accessories AMMAN o C A w A qe a qa y Aa a a Aa Aaa 1 S 4 10 Contents 5 General Information This manual contains information on operating testing and servicing the Agilent 85025A B D E detectors Figure 1 1 shows the detectors Product Description The 85025A B D E detectors are specifically designed for use with Agilent 8757 series scalar network analyzers Table 1 1 85025 Series Detector Descriptions Detector Connector Type Frequency Range 85025A 85025A Option 001 85025B 85025D 85025E Type N m precision 7 mm precision 3 5 mm m precision 2 4 mm m precision 3 5 mm m 01 to 18 GHz 01 to 18 GHz 01 to 26 5 GHz 01 to 50 GHz 01 to 26 5 GHz Agilent 85025A B D E General Information 1 1 85025X DETECTOR a HEWLETT SER_ 00109 PACKARD MADE IN USA FRONT ee SIDE cel Ee A MAX INPUT 20 dBm 10 VDC OH pc41la_e Figure 1 1 85025A B D E Detector 1 2 General Information Agilent 85025A B D E Specifications and Supplemental Characteristics Tables 1 2 through 1 6 list detector specifications when used with an 8757 series scalar network analyzer These specifications represent the warranted performance standards or limits against which you can test the device Table 1 7 lists supplemental typical
21. AL PWR MEAS Dynamic Upper Limit PWR LVL 120 4B 12dB ATTEN ATTEN LVL dBm PWR ACOY dBm ATTEN ATTEN 120dB 124B 16dBm LVL Error Setting Setting ATTN ATTN CAL Cursor dBm dB dB ATTN dBm 0 10 0 REF REF 10 0 0 52 6 4 0 40 3 0 7 0 40 0 10 0 REF REF 3 10 3 0 40 6 10 6 0 40 10 20 0 0 40 13 20 3 0 40 16 20 6 0 40 20 30 0 0 40 25 30 5 0 40 30 40 0 0 40 3523 40 5 0 40 4023 50 0 0 70 4524 50 5 1 0 5024 60 0 1 3 5529 60 5 1 6 5022 60 6 1 3 5526 70 1 1 6 1 Upper limit does not include measurement uncertainties 2 Smoothing ON 3 Averaging ON Averaging Factor 4 4 Averaging ON Averaging Factor 8 5 Averaging ON Averaging Factor 8 6 Averaging ON Averaging Factor 32 4 32 Performance Tests Agilent 85025A B D E 85025A B D E Detector Performance Test Record 9 of 9 RF Input Connector Mechanical Tolerances Connector Minimum Maximum Measured Recession Recession Recession inches inches inches 85025A 0 207 0 210 Type N male 85025A Option 001 0 000 0 003 Precision 7 mm Precision 7 mm Collet must spring back out Pass Collet Resilience after being depressed Fail 85025B E 0 000 0 003 Precision 3 5 mm male 85025D 0 000 0 002 Precision 2 4 mm male 1 Minimum recession must NEVER be less than the minimum recession tolerance If a connector fails this specification immediately replace i
22. BASE O 60 DIM Cal 1 50 1 2 TU INTEGER 1 Pm_points 80 90 GRAPHICS OFF 100 PRINTER IS 1 110 OFF KEY 120 OUTPUT 1 CHR 12 130 BEEP 300 1 140 INPUT ENTER THE POWER SENSOR SERIAL LAST 5 DIGITS Serial Agilent 85025A B D E Automated Program Listing 9 5 150 160 170 180 190 200 210 220 230 240 250 260 270 280 290 300 310 320 330 340 350 360 370 380 390 400 410 420 430 440 450 460 470 480 490 500 510 PRINT USING 3 K ENTER BOTH FREQ AND CAL SEPARATED BY A COMMA PRINT ENTERING A NEG FREQ WILL BACK UP PRINT USING 3 K FREQ CAL 1 FOR I 1 TO 50 50 POINTS MAX Entry BEEP 200 02 DISP I Enter FREQ in GHz and CAL in Y 0 0 EXITS INPUT Freq Pct IF Freq 0 OR Pct 0 THEN GOTO Done Freq Freq 1000 IF Freq lt O THEN I I 1 BEEP 1000 02 GOTO Entry END IF IF I gt 1 THEN IF Freq lt Cal I 1 1 THEN DISP FREQ MUST BE GREATER THAN LAST ENTRY TRY AGAIN BEEP 2000 5 WAIT 2 GOTO Entry END IF END IF Cal I 1 Freq Cal 1 2 Pct PRINT USING DD 3X 6D D 5X 3D D 1 Freq Pct NEXT I Done DISPLAY ENTERED VALUES Pm_points 1 1 OUTPUT 1 CHR 12 PRINT USING K K ENTERED VALUES FREQ CALA FOR I 1 TO Pm_points PRINT USING DD 3X 6D D 5X 3D D 1I Cal 1I 1 Cal I 2 NEXT I 9 6 Automated Program Listing Agilent 85025A B D E 520 PRINT Power Sensor serial number Serial 530 BEEP 400 1 540 DISP PRESS CONTINUE TO STORE DATA O
23. DETECTOR UNDER H TEST 1 1 1 J POWER SENSOR pc417a_e Figure 4 3 Frequency Response Measurement Setup 4 12 Performance Tests Agilent 85025A B D E Specifications Specifications apply at a temperature range of 25 C 5 C For the detector s return loss specifications refer to Tables 1 2 through 1 6 85025A B D E Frequency Response Performance Test Procedure Note For 85025D detectors While the detector is specified down to 10 MHz the power sensor used in this procedure is only calibrated down to 50 MHz If data is required below 50 MHz characterize the power sensor to 10 MHz or use an additional power sensor which covers this frequency range and correlate the results with the data above 50 MHz Configuring the System 1 Connect the equipment as shown in Figure 4 3 with nothing connected to the attenuated output of the source Switch ON all equipment and allow 30 minutes for warmup On the power meter press mode Zero and calibrate the power meter If you are unsure of how to do this refer to the power meter s Operating and Service Manual RANGE HOLD and POWER REF should remain out Set the CAL FACTOR dial on the power meter to the value indicated for 50 MHz on the power sensor CAL FACTOR chart On the analyzer press PRESET CHANNEL CHAN 2 DEF INSTRUMENT STATE SYSTEM MODE DC On the analyzer zero the detector by pressing DC DET
24. EXT I SUBEND SUB Graticule generates graphics graticule COM Measure Meas Set_power Start Stop Scale INTEGER Points GCLEAR DEG LDIR O I xk GRATICULE X Stop Start Xmin 15 X Xmax 1 02 X Ymax 1 2 Scale Ymin 1 5 Scale WINDOW Xmin Xmax Ymin Ymax CLIP 0 X Scale Scale FRAME LINE TYPE 3 GRID 2000 Scale 5 0 0 LINE TYPE 1 AXES 1000 Scale 10 0 0 2 2 CLIP OFF I xk X AXIS LABEL x x CSIZE 4 3 FOR I INT Start 1000 TO Stop STEP 4000 LORG 6 MOVE I Scale LABEL I 1000 NEXT I 1 xk Y AXIS LABEL CSIZE 4 9 12 Automated Program Listing Agilent 85025A B D E 1920 1930 1940 1950 1960 1970 1980 1990 2000 2010 2020 2030 2040 2050 2060 2070 2080 FOR I Scale TO Scale STEP Scale 5 LORG 8 MOVE O I LABEL INT 1I 100 5 100 NEXT 1 1 xk LABELS CSIZE 5 LORG 4 MOVE Stop Start 2 Scale LABEL ABSOLUTE dB ERROR vs FREQ LORG 6 MOVE Stop Start 2 Scale 1 1 LABEL FREQUENCY in GHz LDIR 90 MOVE Xmin 0 LABEL dB ERROR 2090 SUBEND Agilent 85025A B D E Automated Program Listing 9 13 Index A adjustments 4 33 C cable lead identification 2 3 characteristics supplemental 1 7 connector mating 2 3 contacting Agilent iv D detector connecting 2 3 replacing 7 2 E electrostatic discharge ESD 2 1 cautions 3 1 F floor mat use 2 2 H heel strap use 2 2 I initial inspection 2 1 input connector cleaning 8 2 gaging 8 2 installation 1 10
25. Factor 4 6 Averaging ON Averaging Factor 8 7 Averaging ON Averaging Factor 8 4 30 Performance Tests Agilent 85025A B D E 85025A B D E Detector Performance Test Record 7 of 9 Dynamic Accuracy in AC Mode 1 2 3 4 5 6 7 8 9 Nominal Nominal Nominal CAL CAL CAL PWR MEAS Dynamic Upper Limit PWRIVL 120 4B 12dB ATTEN ATTEN LVL dBm PWR ACCY 85025 A B D E dBm ATTEN ATTEN 120 dB 12 dB 16 dBm LVL Error unless noted Setting Setting ATTN ATTN CAL Cursor dBm otherwise dB dB ATTN dBm 0 10 6 REF REF 16 0 0 0 702 1 02 13 0 3 0 612 0 76 10 0 6 0 52 6 10 0 0 40 10 3 0 40 0 10 6 REF REF 3 10 9 0 40 a 20 2 0 40 10 20 6 0 40 13 20 9 0 40 164 30 2 0 40 20 30 6 0 40 254 5 40 1 0 40 304 5 40 6 0 40 354 6 50 1 0 40 404 6 50 6 0 70 454 7 60 1 1 0 504 7 60 6 1 3 5518 70 1 1 6 1 Upper limit does not include measurement uncertainties 2 85025A B only 3 85025D E only 4 Smoothing ON 5 Averaging ON Averaging Factor 4 6 Averaging ON Averaging Factor 8 7 Averaging ON Averaging Factor 8 8 Averaging ON Averaging Factor 32 Agilent 85025A B D E Performance Tests 4 31 85025A B D E Detector Performance Test Record 8 of 9 Alternate Tests 1 2 3 4 5 6 7 8 9 Nominal Nominal Nominal CAL CAL C
26. IMITED TO THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE AGILENT SHALL NOT BE LIABLE FOR ERRORS OR FOR INCIDENTAL OR CONSEQUENTIAL DAMAGES IN CONNECTION WITH THE FURNISHING USE OR PERFORMANCE OF THIS DOCUMENT OR ANY INFORMATION CONTAINED HEREIN SHOULD AGILENT AND THE USER HAVE A SEPARATE WRITTEN AGREEMENT WITH WARRANTY TERMS COVERING THE MATERIAL IN THIS DOCUMENT THAT CONFLICT WITH THESE TERMS THE WARRANTY TERMS IN THE SEPARATE AGREEMENT WILL CONTROL EXCLUSIVE REMEDIES THE REMEDIES PROVIDED HEREIN ARE BUYER S SOLE AND EXCLUSIVE REMEDIES AGILENT SHALL NOT BE LIABLE FOR ANY DIRECT INDIRECT SPECIAL INCIDENTAL OR CONSEQUENTIAL DAMAGES WHETHER BASED ON CONTRACT TORT OR ANY OTHER LEGAL THEORY Assistance Product maintenance agreements and other customer assistance agreements are available for Agilent products By internet phone or fax get assistance with all your test amp measurement needs Contacting Agilent Online Assistance United States Japan New Zealand tel 1 800 452 4844 tel 81 426 56 7832 tel 0 800 738 378 fax 81 426 56 7840 fax 64 4 495 8950 Canada Latin America Asia Pacific tel 1 877 894 4414 tel 305 269 7500 tel 852 3197 7777 fax 905 206 4120 Tax 305 269 7599 fax 852 2506 9284 Europe Australia tel 31 20 547 2323 tel 1 800 629 485 fax 31 20 547 2390 fax 61 3 9210 5947 Safety Notes The following safety notes
27. Information Agilent 85025A B D E Installation Refer to the following information when using the detector Do not drop the detector or subject it to excessive mechanical shock Initial Inspection 1 Check the shipping container and packaging material for damage 2 Check that the shipment is complete 3 Check connector cable and detector body for mechanical damage 4 Check the detector electrically Either perform the operator s check in Chapter 3 Operation or make a measurement in Chapter 4 Performance Tests If any of the following conditions exist notify your nearest Agilent office m Incomplete shipment m Mechanical damage or defect m Failed electrical test If you find damage or signs of stress to the shipping container or the cushioning material keep them for the carrier s inspection Agilent does not wait for a claim settlement before arranging for repair or replacement Agilent 85025A B D E Installation 2 1 Electrostatic Discharge ESD ESD can damage the highly sensitive circuits in this device charges as low as 100 V can destroy a detector ESD damage occurs most often as you connect or disconnect a device Use this detector at a static safe workstation and wear a grounding strap Never touch the input connector center contacts or the cable contact pins Static Safe Work Station Figure 2 1 illustrates a static safe station using two types of ESD protection that you can use either
28. N DISC 550 PAUSE 560 l 570 DISP 580 ON ERROR GOSUB Error 590 ASSIGN File TO PM_ amp VAL Serial 600 OFF ERROR 610 OUTPUT File Pm_points Cal 620 ASSIGN File TO 630 BEEP 500 02 640 DISP CAL FACTORS HAVE BEEN STORED ON DISC 650 CAT 660 STOP 670 680 PGR OA KA k kk 690 Error ERROR ON ASSIGNMENT 700 710 IF ERRN 56 THEN NO EXISTING FILE 720 CREATE BDAT PM_ amp VAL Serial 4 CREATE FILE 730 RETURN 740 END IF 750 DISP ERROR ERRN FIX THEN PRESS CONTINUE 760 BEEP 2000 3 770 PAUSE 780 DISP 790 RETURN 800 END Agilent 85025A B D E Automated Program Listing 9 7 10 20 30 40 50 60 70 80 90 100 110 120 130 140 150 160 170 180 190 200 210 220 230 240 250 260 270 280 290 300 310 320 330 340 350 360 370 380 DETECTOR FLATNESS PROGRAM Plots detector measurements vs power meter measurements I OPTION BASE O COM INTEGER Cal_data_flg COM Cal_f Cal 1 50 1 2 INTEGER Pm_points COM Measure Meas 1 401 1 3 Set_power Start Stop Scale INTEGER Points COM Hpib Sna Source Pwr_mtr I GINIT CALL Clear_screen OFF KEY ASSIGN Sna TO 716 Scalar Network Analyzer address ASSIGN Source TO 717 Passthrough address to Source ASSIGN Pwr_mtr TO 713 Power Meter address U Change the below variables as needed for the detector under test Max_points 401 Start 10 Start frequency in MHz Stop 26510 Stop frequency in MHz
29. OWER METER DC MODE ONLY A H MODULATOR AC MODE ONLY PRIVE U FILTER i i U l POWER SENSOR ATTENUATOR 10dB 1dB STEP STEP ATTENUATOR ATTENUATOR DETECTOR UNDER pc419a_e Figure 4 4 Absolute Power Accuracy Test Setup Agilent 85025A B D E Performance Tests 4 17 2 For each of the power levels specified in columns 2 and 3 of the Performance Test Record record the required calibration data of the step attenuators 10 dB step attenuator data in column 4 and 1 dB step attenuator data in column 5 3 Calculate the calibrated power level for each power level and record this value in column 6 CAL PWR LVL An example follows 1 Nominal 2 Nominal 3 Nominal 4 CAL 5 CAL 6 CAL PWR LVL 10 dB STEP 1 dB STEP ATTEN ATTEN ATTEN PWR LVL ATTEN 0 10 6 10 02 6 01 0 03 16 dBm column 4 column 5 CAL PWR LVL 16 dBm 10 02 dB 6 01 dB 0 03 dBm 4 On the 8116A set a frequency of 50 MHz by pressing Sine Function P Duty DTY Using the VERNIER rocker keys adjust for a 50 duty cycle display Press Frequency FRQ Using the VERNIER and RANGE rocker keys adjust for a 50 MHz display Select normal operation LED NORMAL ON 5 On the analyzer press PRESET CHAN 2 OFF Switch continuous wave ON and select DC mode for the detector by pressing INSTRUMENT STATE SYSTEM MORE SWEEP MODE CW ON INSTRUMENT STATE SYSTEM MODE DC 6 Confi
30. Test 2 2 4 DeSEFIPUION ests ys e a ee tits A eo AO ene AO az Equipment Required 0 ee ee Equipment Common to 85025A B D E 2 Additional Test Equipment Required for 85025A Additional Test Equipment Required for 85025A Option 001 Additional Test Equipment Required for 85025B Additional Test Equipment Required for 85025D Only Additional Test Equipment Required for 85025E Only SpecCiCations 22 fea lo a Se ae Ee ee T tel 85025A B D E Frequency Response Performance Test Procedure Configuring the System Characterizing the Source Characterizing the Detector 4 Computing the Maximum Error 4 Power Accuracy Performance Test Specifications ro a genus e a BE th a Ee 9 D SeriptiOn 00 000 Yo seg ee Ba Be er EO 0 Equipment Required a o o Proced TE drasi aasian RA ae ts N h e e a 2 Absolute Power Accuracy in DC Mode Performance Test Dynamic Accuracy in AC Mode Performance Test Power Accuracy Alternate Procedure Using an 8350B 10 dBm MAAMUA e ds dd a a a Alternate Equipment o Procedure S tdo e a A AS nz F Absolute Power Accuracy in DC Mode Alternate Procedure Dynamic Accuracy in AC Mode Alternate Procedure Performance Test Record ee 4 1 4 3 4 3 4 3 4 3 4 6 4 7 4 7 4 9 4 9 4 9 4 11 4 11 4 11 4 11 4 11 4 11 4 12 4 13
31. The tables assume you are using the corresponding connector compatible Agilent directional bridges For example an 85027A bridge with an 85025A detector 4 4 Performance Tests Agilent 85025A B D E Table 4 2 85025A B Return Loss with Measurement Uncertainty Model L Specified Return Loss and Measurement Uncertainty vs Frequency 0 01 to 0 04 GHz 0 04 to 4 0 GHz 4 0 to 18 GHz 18 to 26 5 GHz 85025A 10 0 6 dB 20 41 4 dB 17 41 1 dB 85025A Option 001 10 0 6 dB 20 1 1 dB 17 40 7 dB 85025B 10 40 6 dB 20 1 1 dB 17 40 7 dB 12 40 9 dB Table 4 3 85025D Return Loss with Measurement Uncertainty Specified Return Loss and Measurement Uncertainty vs Frequency 0 01 to 0 04 GHz 0 04 to 0 1 GHz 0 1 to 14 GHz 14 to 34 GHz 24 to 40 GHz 40 to 50 GHz 10 5 dB 20 2 1 5 dB 23 3 2 dB 20 3 2 dB 15 2 1 5 dB 9 2 1 5dB Table 4 4 85025E Return Loss with Measurement Uncertainty Specified Return Loss and Measurement Uncertainty vs Frequency 0 01 to 0 04 GHz 0 04 to 0 1 GHz 0 1 to 25 GHz 25 to 26 5 GHz 10 0 5 dB 20 1 dB 25 2 dB 23 1 8 dB Note An 85027A B C D directional bridge depending on the connector type is used to measure the detector return loss Agilent 85025A B D E Performance Tests 4 5 Return Loss Measurement SWEEP OUT IN SWEEP IN HP 8757 SYSTEM INTERFACE POS Z BLANK POS Z BLANK
32. User s and Service Guide Agilent Technologies 85025A B D E Detectors tt Agilent Technologies Agilent Part Number 85025 90063 Printed in USA September 2002 Supersedes September 1995 Copyright 1995 2002 Agilent Technologies Hewlett Packard to Agilent Technologies Transition This documentation supports a product that previously shipped under the H ewlett Packard company brand name The brand name has now been changed to Agilent Technologies The two products are functionally identical only our name has changed The document still indudes references to Hewlett Packard products some of which have been transitioned to Agilent Technologies Certification Agilent Technologies certifies that this product met its published specifications at the time of shipment from the factory Agilent further certifies that its calibration measurements are traceable to the United States National Institute of Standards and Technology to the extent allowed by the Institute s calibration facility and to the calibration facilities of other International Standards Organization members DOCUMENTATION WARRANTY THE MATERIAL CONTAINED IN THIS DOCUMENT IS PROVIDED AS IS AND IS SUBJECT TO BEING CHANGED WITHOUT NOTICE IN FUTURE EDITIONS FURTHER TO THE MAXIMUM EXTENT PERMITTED BY APPLICABLE LAW AGILENT DISCLAIMS ALL WARRANTIES EITHER EXPRESS OR IMPLIED WITH REGARD TO THIS MANUAL AND ANY INFORMATION CONTAINED HEREIN INCLUDING BUT NOT L
33. X 1 2 cal factor in 4 Act_pwr Power Power 10 LGT Cal_factor 100 actual power read SUBEND SUB Set finds freq response of source using pwr mtr as ref Agilent 85025A B D E Automated Program Listing 9 9 760 770 780 790 800 810 820 830 840 850 860 870 880 890 900 910 920 930 940 950 960 970 980 990 1000 1010 1020 1030 1040 1050 1060 1070 1080 1090 1100 1110 COM Cal_f Cal INTEGER Pm_points COM Measure Meas Set_power Start Stop Scale INTEGER Points COM Hpib Sna Source Pwr_mtr Clear_screen OUTPUT Sna MDO OUTPUT Source MDO CW PL 60DB RFO works for 8350 or 8340 41 BEEP 400 1 DISP CONNECT POWER SENSOR TO ATTENUATORS PAUSE I CALL Zero_mtr OUTPUT Source PL Set_power DB RF1 MDO SV1 AMO PMi for 8350 40 41 FOR I 1 TO Points OUTPUT Source CW Meas I 1 MZ IF I 1 THEN WAIT 5 Read_pwr Meas 1 2 Corr_pwr Meas I 1 Meas 1 2 DISP USING 940 Freq Meas I 1 MHz Power Meas I 2 dBm IMAGE K 6D D K 3D 2D K NEXT I DISP Set_flg 1 SUBEND 1 SUB Clear_screen clears alpha and graphics screen GRAPHICS OFF OUTPUT 1 CHR 12 DISP SUBEND U SUB Read_pwr Power reads power from 436A power meter 9 100 COM Hpib Sna Source Pwr_mtr REPEAT WAIT 3 OUTPUT Pwr_mtr 9D T ENTER Pwr_mtr USING B B X K Sts Range Power Automated Program Listing Agilent 85025A B D E 1120 1130 1140 1150 1160 1170 1180 1190 1200 1210 1220
34. ZERO MANUAL CONT When the zero is complete the display will indicate MANUAL ZERO COMPLETE 5 Connect the power meter sensor to the attenuated RF output On the source RF plug in press Cw 5 0 MHz Agilent 85025A B D E Performance Tests 4 13 7 Adjust the power level for an indication of 10 dBm on the power meter Do not readjust the power level for the remainder of this test Characterizing the Source 8 On the source press CW and enter the desired test frequency as indicated on the Performance Test Record located at the end of this chapter For example CW oi CF2 9 Using the CAL FACTOR chart on the power sensor set the CAL FACTOR dial on the power meter to the value indicated for the test frequency as needed Use the nearest frequency value 10 Note the reading on the power meter 11 Record this value and the test frequency in the Performance Test Record 12 Repeat steps 9 and 10 until the source is characterized to your satisfaction Characterizing the Detector 13 Disconnect the power meter sensor 14 On the analyzer zero the detector by pressing DC DET ZERO AUTOZRO When the zero is complete the display will indicate AUTOZERO COMPLETED 15 Connect the detector between the attenuated output of the source and INPUT A of the analyzer 16 On the analyzer press CHAN 2 OFF to switch channel 2 OFF Press FUNCTION to switch the cursor ON 17 On the source press and enter the value
35. ace provided in column 7 of the Performance Test Record Set both attenuators to 0 dB attenuation Note and record the cursor value Set the attenuators for the next Nominal PWR LVL dBm Note For nominal power levels of 16 dBm and below use a combination of AVERAGING ON and SMOOTHING ON to reduce trace noise and obtain a stable reading Refer to the Performance Test Record for the specified AVERAGING FACTOR Allow for settling time after resetting the attenuator s 17 18 When the cursor reading has stabilized note and record the value in column 7 Repeat steps 13 and 14 for each nominal power level listed on the Performance Test Record Agilent 85025A B D E Performance Tests 4 19 19 Calculate the Dynamic Accuracy Error as follows Dynamic Accuracy Error MEAS PWR LVL CAL PWR LVL Include and preserve signs in this calculation Enter this value in the Dynamic ACCY Error dBm column 8 of the Performance Test Record Dynamic Accuracy in AC Mode Performance Test 20 21 22 23 24 25 26 27 Connect equipment as shown in Figure 4 4 Connect the modulator s DRIVE INPUT to the analyzer s rear panel MODULATOR OUTPUT Connect the DUT to the attenuated output Switch the equipment ON and allow 30 minutes for warmup Record and calculate the data as necessary into columns 4 5 and 6 of the Performance Test Record If the attenuators used in this test are the same as the ones us
36. aging the detector s input connector see Detector Maintenance Agilent 85025A B D E Performance Tests 4 1 Table 4 1 Recommended Equipment Description Recommended Agilent Model Scalar network analyzer Sweep oscillator Power meter Equipment Common to all 85025A B D E Detectors 8757C D E 8350B 436A 437B or 438A Equipment required for 85025A Detectors Calibrated open short Adapter type N m to type N m RF plug in 83592C Power sensor 8481A Directional bridge 85027C Shielded open p n 85032 20002 Short 11511A Adapter type N m to type N m p n 1250 1475 Attenuator 8491B Option 010 Equipment required for 85025A Option 001 Detectors RF plug in 83592C Power sensor 8481A Option 001 Directional bridge 85027A p n 85021 60001 p n 1250 1475 Calibrated open short Attenuator Attenuator 8492A Option 010 Equipment required for 85025B Detectors RF plug in 83595C Power sensor 8485B Directional bridge 85027B p n 85037 60001 8493C Option 010 Sweep oscillator RF plug in Power sensor Directional bridge Open 2 4 mm m Short 2 4 mm m Adapter 2 4 mm f to 2 4 mm f Attenuator Equipment required for 85025D Detectors 8350B 83597B 8487A 85027D 85141A 85140A 11900B 8490D Option 010 4 2 Performance Tests Agilent 85025A B D E Table 4 1 Recommended Equipment continued Description Recommended Model Equipment required for 85025E Detec
37. ails Since the detector is measuring the output of an external source problems may be due to the source rather than the detector Verify that the source output as well as the bandpass filter waveform are accurate Note that bandpass filters can vary considerably from unit to unit If the average noise floor is not below 50 dBm in DC mode try zeroing the detector The instructions for zeroing the detector can be found earlier in this chapter 3 8 Operation Agilent 85025A B D E 4 Performance Tests Use the procedures in this chapter to test the detector s electrical performance to the specifications listed in General Information None of these tests require access to the detector s interior To completely test each detector three tests are required 1 return loss 2 frequency response 3 absolute power dynamic accuracy Note For information on automating the Frequency Response Performance Test see the chapter titled Program Listing Equipment Required Preceding each test is a list that describes the equipment required to perform that particular test You may substitute any equipment that meets the indicated critical specifications See Table 4 1 for an overall list of required equipment Note Before you proceed with the performance tests gage the input connector on the detector and enter the results in the Performance Test Record at the end of Performance Tests For instructions on g
38. are used throughout this manual Familiarize yourself with each of the notes and its meaning before operating this instrument Caution Caution denotes a hazard It calls attention to a procedure that if not correctly performed or adhered to would result in damage to or destruction of the instrument Do not proceed beyond a caution sign until the indicated conditions are fully understood and met A The instruction documentation symbol The product is marked with this symbol when it is necessary for the user to refer to the instructions in the documentation How to Use This Guide This guide uses the following conventions Front Panel Key This represents a key physically located on the instrument Softkey This indicates a softkey a key whose label is determined by the instrument s firmware Screen Text This indicates text displayed on the instrument s screen Documentation Description This manual contains information on operating testing and servicing the Agilent 85025A B D E detectors Contents 1 General Information Product Description e Specifications and Supplemental Characteristics Operating Environment aooaa a a E Accessories 26 6 a gat Storage and Shipment a a ee ENVITONMENE 2 aR oTa ee Sto a O Packaging pa cite ee O eae ad Returning a Detector for Service 0 20484 2 Installation Initial Inspection x e s a por E e o Ele
39. ase specifications for the test devices in the measurement Agilent 85025A B D E Performance Tests 4 3 Example A The specified return loss for an 85025A detector at 1 GHz is 20 dB The measurement uncertainty is 1 4 dB If the detector s measured return loss is 20 dB 1 4 dB 21 4 dB or higher the detector is definitely within specification If the measured return loss is within the specified return loss plus or minus the measurement uncertainty the detector may or may not be within specification One way to reduce the measurement uncertainties is to measure the detector using a vector network analyzer Example B If the 85025A in Example A measures 20 dB 1 4 dB i e from 18 6 to 21 4 dB it cannot be determined if it is or is not within specification If the measured return loss is less than the specified return loss minus the measurement uncertainty the detector is definitely out of specification Example C If the 85025A in Example A and B measured less than 20 dB 1 4 dB 18 6 dB or less the detector is definitely out of specification The three main sources of error in these measurements come from a Bridge directivity m Source match of the bridge m Dynamic accuracy of the analyzer The first two vary with frequency while dynamic accuracy varies with the measured return loss amplitude Tables 4 2 4 3 and 4 4 show measurement uncertainty for the 85025A B 85025D and 85025E detectors respectively
40. ck absolute gain of the detector across its operating frequency range It checks the relative variations in gain across the operating frequencies for example flatness To simplify the measurement procedure frequency response is measured with a nominal 10 dBm signal applied First the source is characterized for frequency response using a calibrated power meter sensor combination Next the DUT is characterized Finally a point by point difference is computed plotted and compared to the specification window Differences in the values recorded due to the different measurement scheme should be negligible The manual test described in this procedure has an approximate root sum of the squares RSS uncertainty ranging from 0 19 dB to 0 37 dB for 85025A B E detectors and 0 12 dB to 0 76 dB for 85025D detectors This implies that a good detector well within the limits of its specifications could measure out of specifications This measurement is only an indication of the detector s response within these limits If greater measurement accuracy is desired a test system that minimizes Agilent 85025A B D E Performance Tests 4 9 the sources of measurement uncertainty will be required An error analysis of the sources of measurement uncertainty follows Table 4 5 Approximate Error Analysis at 18 GHz for 85025A B E Detectors Uncertainty 85025A 85025A 85025B 85025E Option 001 Power Sensor CAL Factor Uncertainti
41. ctrostatic Discharge ESD a a a a a a a Static Safe Work Station oaoa a a ee 0 Static Safe Practices oa a a a a ee ee s Z Power Requirements OA mets amp Mating Connectors 2 ee a a a paz Connecting the Detector E ds da 3 Operation Features A E A A A y ad Operating Theory iia e a Measurement System Configuration DC Detection mode 0 0 08 0008 2G Accurate DC Measurements 02884 Zeroing the Detector 2 a a a AULOZERO 22 ada e ack el ew Bk art hk me ae Ab hele a Manual Aero t aw es ee Be Re ee ee BS AC Detection Measurements 0 0 88 Operator s Check euki aote o Procedure Det Se He aL ui Re re OF If the Operator s Check Fails 2 2 ee Ria AA ps D G O O LO a kel 3 2 3 2 3 3 3 3 3 3 3 3 3 3 3 4 3 6 3 6 3 7 3 8 Agilent 85025A B D E Contents 1 4 Performance Tests Equipment Required o o Return Loss Performance Test 85025A B D E Return Loss Performance Test Procedure Specifications ser ie a ae Ree ee a che Description 103 o e Le Se ie Me re Ae T Return Loss Measurement o Calibrating the Scalar Network Analyzer Return Loss from 40 MHz to 18 GHz to 26 5 GHz for 85025B E only to 50 GHz for 85025D only 2 2 Th This Test Fails ine e e ae ee ee SS ee Frequency Response Performance
42. cursor reading being displayed The display should now indicate a power reading of 0 00 dBm Note Pressing on the analyzer does not reset any DC OFFSET to zero and the SAVE RECALL registers do not save or recall the offset value s SWEEP_OUT IN SWEEP_ IN HP 8757 SYSTEM INTERFACE POS Z BLANK CALAR ETWORK NALYZER BZU SWEEP RF OSCILLATOR PLUG IN POWER SPLITTER DETECTOR DIRECTIONAL BRIDG pc411da_e Figure 3 2 Typical System Setup for 0 01 to 50 GHz Measurements Agilent 85025A B D E Operation 3 5 AC Detection Measurements For the majority of measurements AC detection is still the preferred method AC detection offers greater sensitivity and immunity to noise and drift across time and temperature AC detection amplitude measurements with this scalar network analyzer system require a modulation envelope This envelope is provided through a 27 778 kHz square wave amplitude modulation of the RF test signal Test set connections vary depending on the source Figure 3 2 depicts a typical measurement setup The 27 778 kHz modulation is supplied by the sweep oscillator Operator s Check The following procedure provides a quick operational check of the 85025A B D E detector Table 3 1 Equipment Required for Operator s Check Description Model Part Number Detector 85025A B D E GPIB cable 10833A B
43. d be done immediately in order to assure proper credit for the exchange Note If the existing plastic half cover is damaged or broken replacement covers are available The part number is provided in the replaceable parts list Two are required for each detector Replacing the Cable Assembly 1 2 Order the cable assembly Item 5 in Table 6 1 Remove the outer covers using the cover removal procedure indicated earlier in this section Remove the two pozi drive screws located at the cable end of the metal housing Agilent 85025A B D E Service 7 3 4 Slide the metal housing away from the RF connector to expose the printed circuit P C assembly completely 5 Carefully de solder all cable wires from the P C assembly 6 With the P C assembly facing up secure the detector frame in a vice Be careful to set the detector so the P C assembly is NOT gripped Caution Over tightening the vice causes the frame to bend 7 Use a 7 16 inch open ended wrench to unscrew the cable hex nut 8 Remove the old cable assembly and remove the metal housing from the cable 9 Carefully slide the metal housing onto the new cable assembly Be sure to place the metal housing so the adjustment potentiometers are accessible 10 Screw the cable assembly onto the detector frame 11 Solder the wires of the new cable to the P C assembly refer to Figure 7 2 for proper placement 12 Ensure that all cable wires are sec
44. d if one of the following conditions exist m It fails the visual examination a It fails the mechanical examination m When attaching two connectors together they do not mate smoothly Agilent 85025A B D E Detector Maintenance 8 1 Visual Examination A careful visual inspection should be performed often on all system connectors Vigilance can save money and ensure accurate measurements with your equipment Examine the connectors for such obvious problems as deformed threads contamination or corrosion concentrating especially on the contacting surfaces Look for burrs scratches rounded shoulders and similar signs of wear or damage Any problem you can see is sufficient to cause degraded performance and the detector must be cleaned or replaced Cleaning the Connectors In harsh environments the connectors might become dirty To safely clean the connector carefully brush or wipe dirt from the surface with a foam swab It is safe to use trichlorotrifluoroethane liquid Freon sparingly as a cleaning solvent However it is not safe to use abrasives of any kind such as pencil eraser or any other solvent because of damage to the thin metal plating or to the plastic dielectric supporting element Connector Cleaning Kit When cleaning an RF connector Agilent recommends that you use the Connector Cleaning Kit part number 921937 Gaging Connectors Gaging connectors is necessary to ensure that they conform to mechanical
45. e module in spares stock Return defective module to HP HP pays postage on boxes mailed in U S A instrument in service P Restored exchange modules are shipped individually in boxes like this In addition to the circuit module the box contains Exchange assembly failure report Return address label Open box carefully it will be used to return defective module to HP Complete failure report Place it and defective module in box Be sure to remove enclosed return address label Seal box with tape Inside U S Ax stick preprinted return address label over label already on box and return box to HP Outside U S A do not use ad dress label instead address box to the nearest HP office pc426a_e Figure 6 1 Module Exchange Program Agilent 85025A B D E Replaceable Parts 6 3 Service Caution This product is susceptible to damage from electrostatic discharge ESD When you perform any of the following procedures wear a grounded static strap and work at a static safe work station If the detector fails electrically order a replacement detector Do not order the detector using its model number 85025A B D E Instead use the replacement part number given in Table 6 1 that is referenced to the model number These detectors have the following replaceable items m The input connector m The cable assembly Agilent 85025A B D E Service 7 1 Repair Removing the Covers A small f
46. e detector to be tested to the TEST PORT of the directional bridge On the analyzer press FUNCTION CURSOR and turn the analyzer s front panel knob to read the highest value worst case return loss Record the worst case value in the space provided on the Performance Test Record located at the end of this chapter Return Loss from 40 MHz to 18 GHz to 26 5 GHz for 85025B E only to 50 GHz for 85025D only 10 On the source reset the START STOP frequencies by pressing 40 MHz Next for an 85025A detector press STOP 18 GHz for an 85025B E detector press GHz or for an 85025D detector press 50 GHz 11 On the analyzer ensure FUNCTION MEAS POWER A is still active Remove the detector 12 It will be necessary to recalibrate the analyzer since a new range of frequencies has been selected for measurement Repeat the steps in the section titled Calibrating the Measurement System Agilent 85025A B D E Performance Tests 4 7 Ensure that channel 1 display MEAS MEM is active MEAS MEM is highlighted when active 13 Connect the detector to the TEST PORT of the directional bridge 14 On the analyzer press FUNCTION SCALE 5 dB The CRT display should be somewhat similar to Figure 4 2 A oy ee REF 00 dBm RER STRT 0400GHz CRSR 10 62GHz STOP 26 500GHz pe44ae_c Figure 4 2 85025A B E Return Loss 0 04 GHz to Maximum Frequency 15 On
47. ed in steps 2 and 3 copy the data from the Absolute Power Accuracy in DC Mode Performance Test Record columns 4 5 and 6 On the analyzer press PRESET CHAN 2 OFF FUNCTION CURSOR Set the 10 dB step attenuator to 10 dB and set the 1 dB step attenuator to 6 dB On the 8116A set a frequency of 50 MHz by pressing Sine Function P Duty DTY Using the VERNIER rocker keys adjust for a 50 duty cycle display Press Frequency FRQ Using the VERNIER and RANGE rocker keys adjust for a 50 MHz display Select normal operation LED NORMAL on Refer to the Performance Test Record for the CAL PWR LVL computed at nominal 0 dBm Use the VERNIER rocker keys to adjust the output power to the CAL PWR LVL as displayed by the CURSOR on the analyzer Note and record on the Performance Test Record the cursor value displayed Set both attenuators to 0 dB Note and record the cursor value Set the attenuators for the next Nominal PWR LVL Continue the procedure as outlined in steps 24 through 26 of the DC Mode Test for each of the Nominal PWR LVLs listed on the Performance Test Record This completes the procedure for measuring dynamic accuracy 4 20 Performance Tests Agilent 85025A B D E Power Accuracy Alternate Procedure Using an 8350B 10 dBm maximum Alternate Equipment SweepOscllatOL cuarta ao enel ie e st Aa 8350B A ie rere ena eae eos eer Rene ame ee REE 83592B Scalar network analyzer 0 0 0 c cece tenes 8757C D E 50
48. es 1 5 1 5 1 5 1 5 RSS Mismatch between Attenuator and Power 5 2 3 8 2 1 2 4 Sensor Mismatch between Attenuator and Detector 5 9 4 2 3 3 1 5 Miscellaneous System Errors 1 1 1 1 1 1 3 2 RSS Calculation 8 1 6 0 4 3 4 5 Total RSS Uncertainties Expressed in dB 0 34 to 0 37 0 25 to 0 27 0 18 to 0 19 0 19 to 0 20 Table 4 6 Approximate Error Analysis for the 85025D Detector Uncertainty 26 5 GHz 40 GHz 50 GHz Power sensor CAL factor approximate 1 5 2 2 5 uncertainties Mismatch between attenuator and power 1 3 3 8 7 4 Sensor Mismatch between attenuator and detector 1 4 4 2 14 3 Miscellaneous system errors 1 1 1 1 1 1 RSS calculation 2 7 6 1 16 3 Total RSS uncertainties expressed in dB 0 12 to 0 12 0 26 to 0 27 0 64 to 0 76 Uncertainties are smaller at lower frequencies The error analysis is done assuming the power sensor attenuator and DUT all mate without the use of adapters A standard 85025A is used with an 8481A and 8491B An 85025A Option 001 detector is used with an 8481A Option 001 and 8492A The 85025B E is used with an 8485A and 8493C The 85025D is used with an 8487A and 8490D 4 10 Performance Tests Agilent 85025A B D E Equipment Required Equipment Common to 85025A B D E Sweep oscar id ai eee hee yas 8350B Scalar network analyzer 2 0000 en nes 8757C D E PO WEP Metas a a ca See dass 436A Additional Tes
49. gure the analyzer inputs and perform a manual DC zero On the analyzer press FUNCTION CONFIG SYSTEM DC DET ZERO MANUAL CONT 7 Perform the detector offset calibration On the analyzer press DET OFFSET A 0 4B This ensures 0 dB of offset 8 Connect the detector to the power meter POWER REF output 9 Switch POWER REF output ON 4 18 Performance Tests Agilent 85025A B D E 10 11 12 13 14 15 16 On the analyzer perform the following a Press FUNCTION SCALE AUTO SCALE FUNCTION CURSOR Note the reading for use in step b b Press FUNCTION CAL DET OFFSET A Using the ENTRY keys enter the value opposite in sign to the reading noted above Example CRSR 45 dBm Press OO c Press FUNCTION CURSOR The display should indicate a power level of 0 00 dBm If not repeat the detector DC ZERO and OFFSET CALIBRATION steps 6 and 7 until a 0 00 dBm power level is obtained On the step attenuators set the attenuators for a total of 16 dB attenuation Set the 355C to 6 dB and set the 355D to 10 dB Connect the DUT to the attenuated output On the 8116A enable the output by pressing DISABLE The DISABLE LED should deactivate Refer to the Performance Test Record at the end of this chapter for the calibrated power level computed at nominal 0 dBm Use the VERNIER rocker keys to adjust the output power to the CAL PWR LVL Note the cursor value displayed on the CRT Record this value in the sp
50. he array defaults to the cal factor of the lowest entered frequency point A similar method is used at the high end To reduce the time required to copy these programs the code listings represent a minimum configuration to perform the measurement There are no error checking or convenience features Be careful when entering data and when following the displayed instructions Running the Detector Frequency Response Program The following information will help you successfully run the Detector Frequency Response program m If not testing from 01 to 26 5 GHz change the START STOP frequencies in lines 180 190 to the appropriate values a When prompted enter the last few digits of the power sensor serial number no more than 5 digits Use the same power sensor serial number as in the Cal Factor Entry program a When prompted enter the number of frequency points to be taken no more than 401 The data points will be evenly spaced across the frequency range a When prompted connect the calibrated power sensor to the attenuated output of the source The program automatically zeros the meter m When prompted remove the power sensor and connect the detector under test to the attenuated output of the source Connect the input cable of the detector to the A input of the scalar network analyzer m The program will ask if the test should be performed in AC or DC mode Normally DC mode is used for frequency response testing Agilent 8
51. he cursor at the maximum 10 11 12 value of the trace The CRSR value is displayed in the active entry area of the analyzer Adjust the output power of the RF plug in until the cursor value on the analyzer reads 16 dBm this power level may not be attainable on all sources This value is the upper limit of the dynamic range of the analyzer Press DISPLAY MEAS MEM to store the trace in memory The analyzer s message line displays CHAN 1 MEAS TO MEMORY Disconnect the detector from the RF OUTPUT of the source Press AVG AVG UN to activate the averaging function The averaging value will be 8 Wait a few seconds to allow the trace to settle Press MAX A cursor value of 55 dBm or lower should be displayed in the active entry area This value represents the noise floor power level Insert the bandpass filter between the RF output of the source and the detector Wait a few seconds to allow the trace to settle Press MAX to find the trace maximum The CRSR value displayed in the active entry area now represents the minimum insertion loss of your test device Verify that the bandpass filter shape is as expected Press SYSTEM MODE AC DC until the DC mode is activated Allow the trace to settle The trace should look similar to the trace observed in step 11 however the noise floor may be up to 5 dB higher If the noise floor level has increased more than 5 dB zero the detector If the Operator s Check F
52. he detector from temperature extremes which can cause condensation Altitude Up to 4 572 m 15 000 ft Agilent 85025A B D E General Information 1 9 Packaging Use containers and materials identical or comparable to those used in factory packaging If you ship the detector follow these packaging instructions 1 Wrap the detector in the original pouch and box If they are not available wrap the detector in heavy paper and use a strong shipping container Provide a firm cushion that prevents movement inside the container Use a layer of shock absorbing material around all sides of the detector 3 Seal the shipping container securely 4 Mark the shipping container FRAGILE Returning a Detector for Service When you make an inquiry either by mail or by telephone refer to the detector by both model number and full serial number If you ship the detector to an Agilent office or service center fill out a blue service tag provided at the back of this manual and include the following information 1 NN Fe WwW N Company name and address Do not use an address with a P O box number because products cannot be returned to a post office box The complete phone number of a technical contact person The complete model and serial number of the detector The type of service required calibration repair Any other information that could expedite service such as failure condition or Cause 1 10 General
53. he operating frequency of the detector you are testing Note The 8360 Series and 83752A B must first be placed in network analyzer language before running the program a 8757C D E scalar network analyzer m 436A power meter with an appropriate power sensor Agilent 85025A B D E Automated Program Listing 9 1 m 10 dB attenuator m Printer optional for printouts the printer must be capable of performing a graphics dump a Three GPIB cables 4 required if a printer is used 10833A B C D GPIB is Agilent s hardware software documentation and support for TE EE 488 and IEC 625 worldwide standards for interfacing instruments There are two separate program listings a Cal Factor Entry Program m Detector Frequency Response Program Cal Factor Entry Program The Cal calibration Factor Entry program allows you to input the calibration factors listed on the power sensor These cal factors are stored on a disc under a file name that contains the power sensor serial number This allows the storage of cal factors for more than one power sensor At the beginning of the frequency response program you are asked to input the serial number of the power sensor Only data for that power sensor is loaded into memory Up to 50 cal factors can be stored in each file although less are shown on the power sensors A two dimensional array is created containing combinations of a frequency and its associated cal factor This program need only be
54. lat blade screwdriver with a blade width no greater than 3 5 mm 1 8 inch is required to perform this procedure Procedure 1 Place the detector so its narrow side is on a flat surface Position it so that the RF connector is facing away from you Refer to Figure 7 1 pe49ae_c Figure 7 1 Removing the Detector Covers 7 2 Service Agilent 85025A B D E Hold the sides of the detector near the cable end Insert the screwdriver at a 45 degree angle between the side label and the raised edge of the plastic cover as shown in Figure 7 1 Make sure the screwdriver is inserted as far forward as possible on the detector Rotate the screwdriver about 90 degrees as shown until the cover snaps apart Repeat steps 2 and 3 inserting the screwdriver approximately 2 3 of the way toward the cable end of the detector at the point shown in Figure 7 1 Separate the plastic shell halves If the cover does not separate easily repeat steps 2 3 and 4 on the other side of the detector Attach the covers to the replacement detector by snapping the halves together Replacing the Detector 1 Remove the plastic covers from the existing detector using the cover removal procedure Install the covers on the replacement detector 3 Perform the operator s check described in Operation If using a restored exchange replacement detector return the defective detector using the packing material supplied This shoul
55. lb Shipping 1 0 kg 2 2 Ib Dimensions Including input connector not including cable pet280 e 1 Because a type N gage calibration block zeros the gage at a 0 207 inch offset the gage displays a 0 207 to 0 210 inch offset as 0 000 to 0 003 inches 2 The model used in this illustration is an 85025A Because of varying input connector lengths the overall length measurements for the other detector models covered by this manual are 85025A Option 001 5 3 16 inches 85205B 5 1 8 inches 85025D 5 1 4 inches 85025E 5 7 16 inches General Information Agilent 85025A B D E Operating Environment The detector will operate safely under the following conditions but its performance is not necessarily warranted See the specifications section for more information Temperature 0 to 55 C Humidity Up to 95 Protect the detector from temperature extremes which can cause condensation Altitude Up to 4 572 m 15 000 ft Accessories The detectors come with a 2 meter cable A 25 foot and 200 foot cable can be ordered separately Table 6 1 lists the accessories that are available for use with these detectors Storage and Shipment To keep your detector in proper working condition keep the following suggestions in mind when storing or shipping it Environment Store or ship the detectors in environments within the following limits Temperature 25 to 75 C Humidity Up to 95 Protect t
56. m uF 0 8 sot eee 6 04 0 0 16 10 0 10 20 30 40 50 60 Change in Power dB pc47a_e 1 6 General Information Agilent 85025A B D E Table 1 6 85025E Detector Specifications Frequency Range 0 01 to 26 5 GHz Return Loss 10 MHz to 40 MHz 40 MHz to 100 MHz 100 MHz to 25 GHz 25 GHz to 26 5 GHz 10 dB 20 dB 25 dB 23 dB 10 MHz to 40 MHz 40 MHz to 18 GHz 18 GHz to 26 5 GHz Frequency Response in DC mode input power 10 dBm 0 25 dB 0 75 dB t0 5 dB 0 5 dB at 18 GHz to 1 4 dB at 26 5 GHz Absolute Power Accuracy in DC mode 50 MHz calibrated at 0 dBm ENS 1 4 L LE 20 S 1 0 zal isi of B Z 4 AA 0 20 10 0 10 20 30 40 50 60 Power dBm pc44a_e Dynamic Power Accuracy AC Mode 50 MHz Calibrated at OdBm 46 1 4 L TE T ES dl 8 Be 9 sw 4 v D 20 10 0 10 20 30 40 50 560 Change in Power dB pc4 5a_e Agilent 85025A B D E General Information 1 8 Table 1 7 85025A B D E Detector Supplemental Characteristics RF Connector Mechanical Tolerances Recession of the male center conductor from reference plane 85025A 0 207 to 0 210 inches 85025A Option 001 0 000 to 0 003 inches 85025B 0 000 to 0 003 inches 85025D 0 000 to 0 002 inches 85025E 0 000 to 0 003 inches Cable Length 1 22 m 48 inches Weight Including cable Net 0 24 kg 0 5
57. ng conditions the order is not important m Power accuracy is measured at 50 MHz a If in DC mode autozero has been performed not necessary for AC mode a All equipment has been allowed to warmup for 30 minutes m Source harmonics are below 40 dBc m This performance test includes mismatch effects Specifications assume no mismatch m Trace averaging should be used on the analyzer as required a Offset active and adjusted with a calibrated 0 dBm 50 MHz signal applied DC mode only The recommended method for testing power accuracy is to use an Agilent 8116A pulse function generator as the source An 8116A provides t he amplitude Agilent 85025A B D E Performance Tests 4 15 necessary to check the detector to its full specifications Both AC and DC modes must be tested to verify the performance specifications of the detector Note that the DC mode test is an absolute measurement requiring the use of a calibrated power meter to set a level of 0 dBm Using the 436A as a calibrated 0 dBm 50 MHz source introduces a maximum measurement uncertainty of 0 07 dB AC power accuracy testing is done with the 8116A modulated by an 11665B An alternate procedure is provided using an 8350B with an RF plug in as the source This method does not test the detector to its full specifications tests to 10 dBm and should not be used when traceability to the National Institute of Standards and Technology NIST is re
58. of Absolute Power Accuracy in DC Mode Performance Test Alternate Procedure Connect the DUT to the attenuated output Preset the analyzer Switch OFF channel 2 Switch ON the cursor Set the 10 dB step attenuator to 10 dB On the source set CW to 50 MHz Refer to the Performance Test Record for the CAL PWR LVL computed at nominal 0 dBm Adjust the output power to the CAL PWR LVL Note and record the displayed cursor value Set both attenuators to 0 dB Note and record the cursor value Set the attenuators for the next nominal PWR LVL Continue the procedure as outlined in steps 17 through 19 of the Absolute Power Accuracy in DC Mode Performance Test for each of the nominal PWR LVLs listed on the Performance Test Record This completes the power accuracy alternate procedure 4 24 Performance Tests Agilent 85025A B D E Performance Test Record 85025A B D E Detector Performance Test Record 1 of 9 Test Facility Report Number Date Customer Tested by Model Ambient temperature C Serial Number Relative humidity Options Special Notes Agilent 85025A B D E Performance Tests 4 25 85025A B D E Detector Performance Test Record 2 of 9 Model Report Number Date Test Equipment Used Model Number Trace Number Cal Due Date I 2 4 26 Performance Tests Agilent 85025A B D E 85025A B D E Detector Performance Test Record
59. of the first test frequency Remember to use only the test frequencies used in steps 9 through 11 Note the value indicated by the analyzer s cursor display and record it in the Performance Test Record Repeat this step until all of the same frequency points have been characterized Computing the Maximum Error 18 Using the values recorded in steps 11 and 17 subtract the value in step 11 from the value in step 17 for each of the test frequencies Record the difference in the space provided on the Performance Test Record 4 14 Performance Tests Agilent 85025A B D E Now use these values to plot a point to point variation curve on the graph provided in the Performance Test Record 19 Read the frequency response limits from the appropriate specifications table in Chapter 1 Plot these limits onto the graph with the point to point variation curve 20 The detector is considered to pass this test if the variation curve is contained within the limits OR if an offset can be applied to the variation curve so that it is contained within the limits In other words can the variation curve be shifted up or down to make it fit within the limits This completes the procedure for measuring frequency response Power Accuracy Performance Test Specifications Refer to Table 1 2 through Table 1 6 Specifications apply at 25 C 4 Description LB C Power accuracy is measured with consideration given to the followi
60. panel of the analyzer 2 To secure the DC connector in the analyzer turn the outer shell clockwise 3 Connect the RF input to the test device by turning the male connector s outer shell clockwise Agilent 85025A B D E Installation 2 3 Operation Caution m Electrostatic discharge ESD can damage the highly sensitive circuits in this device charges as low as 100 V can destroy your detector ESD damage occurs most often as you connect or disconnect a device Use this detector at a static safe workstation and wear a grounding strap Never touch the input connector center contacts or the cable contact pins Do not apply more than 20 dBm RF power or more than 10 VDC to the detector Higher power voltage can electrically damage the detector Before you connect a RF cable to the detector always discharge the static electricity that may have accumulated on the cable s outer conductor to instrument ground This is most important if the cable is very long or connected to a large antenna Do not drop the detector or subject it to mechanical shock Agilent 85025A B D E Operation 3 1 Features H l 1 RF INPUT CONNECTOR This connector accepts the RF input signal The RF input connector varies with the detector selected 2 DC CONNECTOR This connector supplies the necessary DC voltage for operation of the HP 85025A B D E and feeds the detector output signal to the network analyzer pc4 10a_e
61. programs 9 5 R repair procedures 7 2 removing the covers 7 2 replacing the cable assembly 7 3 replacing the detector 7 3 replacing the input connectors 7 5 replaceable parts 6 1 replacing detector 7 2 return loss test description 4 3 S service 6 3 returning detector for service 1 10 specifications 1 3 7 85025A including Option 001 1 4 85025B 1 5 85025D 1 6 85025E 1 7 general 1 3 static safe practices 2 2 work station 2 2 storage and shipment 1 9 environment 1 9 T table mat use 2 2 W wrist strap use 2 2
62. quired Equipment Required Pulse function generator 0 00 or 8116A Scalar network analyzer 00 00 00 8757C D E 50 MHz bandpass filter o ooooocccccccccccccoco part number 08757 80027 A IS RE es ee KARTAR N REER ny tae Rad ARRE RAER 8491B Calibrated 10 dB step attenuator 355D Option 001 H88 Calibrated 1 dB step attenuator nnua 355C Option 001 H88 Modulator AC mode only c e 0 cnet eee nen 11665B Power meter DC mode only 00 c cece cence ences 436A 438A A T eR e ah ey sole as required Note Calibrated attenuation is used in the power accuracy calculations below Calibrated step attenuators include a calibration report at 50 MHz to improve measurement accuracy The report lists the actual attenuation of each step at one frequency of interest The calibration report may be ordered as an option with the step attenuators when purchased or performed as a service afterwards 4 16 Performance Tests Agilent 85025A B D E Procedure Absolute Power Accuracy in DC Mode Performance Test 1 Connect the equipment as shown in Figure 4 4 Do not connect detector to attenuator output Do not use the modulator for this test AC mode only Switch all the equipment ON and allow 30 minutes warmup time PULSE FUNCT ON GENERATOR 2000 oooooo0o0000 00000 0000 000 0000 o ALAR NETWORK ANALYZER output 1 pin P
63. run once to store the file on disc Running the Cal Factor Entry Program The following information will help you successfully run the Cal Factor Entry program m When prompted enter the last few digits of the power sensor serial number no more than 5 digits m Enter the frequency in GHz not MHz m Enter both the frequency and the cal factor For example if the cal factor at 50 MHz is 99 enter 05 99 and press ENTER m Each entered frequency must be greater than the preceding frequency a Fractional percentages are allowed Example 98 5 a If you make a mistake back up the program by entering a negative frequency Each negative input backs up one entry and each entry must be input again 9 2 Automated Program Listing Agilent 85025A B D E When all cal factors are entered enter 0 0 to exit The program displays all of the entered points Verify the accuracy of each m When you press CONTINUE the controller will store the file on disc Make sure the disc is not write protected Detector Frequency Response Program The Detector Frequency Response program performs the Frequency Response Performance Test using the cal factors previously stored on the disc Any number of frequency points up to 401 may be chosen although 101 points is more than enough The cal factor used is interpolated between the two closest frequency points The cal factor used for frequencies measured below the lowest entered frequency point of t
64. t Such connectors will damage any connector mated to it 2 The type N gage calibration block zeros the gage at a 0 207 inch offset Therefore the 0 207 inch to 0 210 inch recession is displayed as 0 000 to 0 003 inches on the gage 3 With collet removed Agilent 85025A B D E Performance Tests 4 33 Adjustments There are no adjustments which can be performed on the 85025A B D E Agilent 85025A B D E Adjustments 5 1 Replaceable Parts This chapter provides information on ordering replaceable parts To order a part listed in Table 6 1 m Quote the Agilent part number m Indicate the quantity required m Address the order to your nearest Agilent office To request information on a part that is not listed in Table 6 1 include the instrument model number a description of the part and its function Address the inquiry to the nearest Agilent office How To Order Parts Fast When you know which parts you need to repair the detector contact Agilent Technologies The parts specialists have direct online access to the replacement parts inventory corresponding to Table 6 1 in this guide Agilent 85025A B D E Replaceable Parts 6 1 Table 6 1 85025A B D E Replaceable Parts and Accessories X 85025X DETECTOR U HEWLETT SER 00109 PACKARD MADE IN USA FRONT we ZN MAX INPUT 20 dBm 10 VDC L pc423a_e Item Number Description Agilent Part Number a fF Ww N NY NY NY NH RP Re
65. t Equipment Required for 85025A RE plu Marron ven teers pto hd tan lect in Mer bade agsad 83592C POWECF SENSOR ciate a a a kt ak eh Mata Miata ates gate et Aaah 8481A TO AB attenuator tact eek oh A ee on Ea a 8491B Option 010 Additional Test Equipment Required for 85025A Option 001 RE plugs eree ote tok A ee leis ja la les Sabb ede 83592C POWEESCNSOF cites Aa 8481A 10 dB attenuator eie iee corr 8492A Option 010 Additional Test Equipment Required for 85025B REO pl g in ct eel be ead ieee sea eaten edad ead 83592C Power Sensore cn gh es E aa a 8485A 1Q dB attenuators cick epa the dees Be ae a 8493C Option 010 Adapter type N M to 3 5 mm part number 1250 1744 Additional Test Equipment Required for 85025D Only RE UTS T snc eee Paes at oka ae eae ee eae Rae ene eee 83597B PO WETS ENSOF s seyea secu dicate leans anh abies duet pcan Samad E E A 8487A 10 dB attenuator ecer nistana iaa e eee 8490D Option 010 Adapter 2 4 mm f to 2 4 mm 11900B Agilent 85025A B D E Performance Tests 4 11 Additional Test Equipment Required for 85025E Only RE S TTT 835950 POWeESeCNnSOR A aao H A te aos hes A g kat 8485A LO TS BTT 8493C Option 010 Adapter 3 5 mm f to 3 5 mm part number 1250 1749 SWEEP OUT IN SWEEP IN HP 8757 SYSTEM INTERFACE ooo Sooo 2 00000000 SCALAR RF NETWORK PLUG IN ANALYZER ooo ooo ooo O SWEEP OSCILLATOR l
66. the analyzer press CURSOR Use the cursor to find the highest trace value in each specification range Note A specification range is a range of frequencies which have the same return loss specification For example the 85025A specification from 0 4 to 4 GHz 16 Record each value in the Performance Test Record This completes the 85025A B D E return loss performance test procedure 4 8 Performance Tests Agilent 85025A B D E If This Test Fails Check the detector s input connector to make sure there is no damage Open the detector s case and check the connection between the input connector and the PC board Check that the detector is connected securely to the front panel of the analyzer Replace the connector if necessary If the detector still fails refer to the Service chapter for more troubleshooting information Frequency Response Performance Test Description The frequency response of the 85025A B D E detector is specified as the maximum peak to peak deviation from a constant input signal level of 10 dBm as measured over the specified frequency range At Agilent Technologies frequency response is measured with the use of an automated test station traceable to the U S National Institute of Standards and Technology NIST The frequency response specification for the 85025 family of detectors may more properly be called frequency response flatness The test for frequency response does not che
67. tolerances Out of tolerance connectors have poor electrical performance and could damage another connector mated to them Refer to the Microwave Connector Care Quick Reference Card part number 08510 90860 Refer to Table 1 7 Supplemental Characteristics for 85025A B D E connection tolerances 8 2 Detector Maintenance Agilent 85025A B D E Gaging Connectors to be Mated with the 85025A B D E It is important to gage connectors which will be used with the 85025A B D E The specifications for attaching connectors may vary depending on the connector used and the application However if the following guidelines are used you can avoid connector damage due to tolerance problems Type N female Gage any female device to be mated with the 85025A When mated a type N connector pair must have separation between the tip of the female contact fingers and the shoulder of the male contact pin Do not use female type N connectors that have an inner rubber washer they damage the male center conductor Precision 7 mm Gage with the center conductor collet removed refer to the tolerances given in the device s manual There should be no protrusion of the center conductor in front of the outer conductor mating plane Check the collet for proper spring action Collets should only be removed with a collet extraction tool Refer to the Microwave Connector Care Quick Reference Card for information Precision 3 5 mm female Gage any female connec
68. tor to be used with the 85025B E There should be no protrusion of the tip of the female contact fingers in front of the outer conductor mating plane Agilent 85025A B D E Detector Maintenance 8 3 Automated Program Listing The information in this section is provided as a convenience only It is intended to provide a starting point for making automated measurements and does not contain full error detection or extra enhancements This program is not warranted to be uninterrupted or error free Automating the Frequency Response Test The program listing at the end of this chapter allows you to automate the frequency response test of the detector This test determines the frequency response at up to 401 points in just a few minutes The program first measures the frequency response of the source taking into account the frequency response of the power sensor then measures the frequency response of the detector and finally plots the difference between the two on the computer s CRT This is identical to the manual version of the test and the results should be identical As written this program will test detectors to 26 5 GHz If you need results to 18 or 50 GHz you must modify the START STOP frequencies of the program The following equipment 01 to 50 GHz is recommended to run the program a HP 9000 series 200 or 300 computer with BASIC 2 0 or above a A signal source 83752A B 8360 Series or 8350B with plug in depending on t
69. tors RF plug in 83595C Power sensor 8485A Directional bridge 85027B Calibrated open short p n 85037 60001 Attenuator 8493C Option 010 Return Loss Performance Test This performance test uses an 8757C D E scalar network analyzer system to measure the return loss of the detector 85025A B D E Return Loss Performance Test Procedure Specifications Specifications apply at a temperature range of 25 C 5 C For the detector s return loss specifications refer to Tables 1 2 through 1 6 Description The return loss of the 85025A B D E can be measured using the test system described in this procedure The test setup is calibrated using an open short to minimize frequency response and phasing errors The detector under test is then connected to the TEST PORT of the bridge and its return loss is measured on the analyzer The return loss should be greater than the limits listed in Tables 1 2 through 1 6 There is a certain amount of measurement uncertainty in any scalar network analyzer system The return loss uncertainty for each detector is given in Tables 4 2 through 4 4 Conformance to specification cannot be assured unless the return loss of the detector is equal to the specified return loss plus the measurement uncertainty Failure to meet specification cannot be proven unless measured return loss equals the specified return loss minus the measurement uncertainty The measurement uncertainty is based on the worst c
70. urely connected to the assembly 13 Slide the metal housing over the P C assembly and secure to the frame using pozi drive screws 14 Snap the outer covers back on 7 4 Service Agilent 85025A B D E GREEN WHITE pc425a_e Figure 7 2 Cable Connections Replacing the Connectors Order the appropriate Connector Repair Kit see Table 6 1 for your detector Follow the instructions provided in the kit to replace the connectors Agilent 85025A B D E Service 7 5 Detector Maintenance This chapter describes how to maintain your detector in proper working order This includes m How to inspect the detector a How to clean the input connector m How to gage the input connector Mechanical Inspection This section provides a brief introduction to the fundamentals of proper connector care which is as important to making good measurements as proper instrument calibration and adjustment This is not intended to be a comprehensive discussion of this vital topic For information on connector care refer to the Microwave Connector Care Quick Reference Card part number 08510 90360 Inspecting the Connectors Visual and mechanical inspection of the connectors should be done periodically If a bad connector is accidentally attached to a good connector the good connector can be damaged The time and expense involved in replacing detectors or other devices due to damaged connectors warrants caution A connector is ba

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