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Manual - Phase Matrix

1. LO IF SELECT IF FILTER Lal TRIGGER OUT Y PERIOD PULSE OUT THRESH OUT Eu H INHIBIT IN m J1 a 10 MHz IN OUT an GATE OUT A108 SIGNAL CONDITIONER CONTROL 35 J5 51 vco e A105 COUNT CHAIN J4 COMB lan GENERATOR VS PA BAND 2 IF IF PCB 33 A BAND 2 VID A BAND 2 INPUT YIG 1 26 5 GHz e FILTER 32 54 a A ECL TO A PR TTL CONV BAND 1 77 it CONTROL BAND 0 BAND 1 a O 250MHz 1GHz BAND 0 INPUT 1 0 100Hz 250MH CONTROL Gi LINES CL CONTROL A108 GATE GENERATOR GATE CONTROL LOGIC el GATE ACCUM I O CONTROL 10 MHz SELECT TCXO LOGIC REFERENCE TIMEBASE
2. A102 PROCESSOR GPIB A2 FRONT PANEL ASSY SAMPLE I O PORT RATE INT INT INTERRUPT CONTROL A101 POWER LOGIC LOGIC SUPPLY CENTRON 5V BUFFERS 5 2V BUFFERS 12V SYSTEM BGAN PROM 12V GI P CONTROL UNR LOGIC 18 Eg KEYBOARD BUFFERS 9V INTENSITY CONTROL y GND 235267817 DISPLAY ANNUNCIATORS y REAR PANEL COLUMN DRIVERS gt Figure 3 22 Functional Block Diagram for Models 585C and 588C 3 63 This Page Intentionally Left Blank 3 64 ACCESSORIES INTRODUCTION The accessories available for use with the Phase Matrix 585C and 588C counters are listed in Table 4 1 Part numbers and brief descriptions of the accessories are included Table 4 1 Accessories Accessory Phase Matrix Number Description Part Number ACCO10 Carrying Case ACC021 Rack Mount kit with handles includes hardware 2011121 01 ACC022 Rack Mount kit without handles includes hardware 2011122 01 ACCO31 Operation Manual one supplied with each instrument 5585065 04 ACC032 Operation and Service Manual 5585107 01 ACC043 Molded case and tools for adjustments and tro
3. INSTALLATION UNPACKING The Phase Matrix 585C and 588C series Pulsed Microwave Frequency Counters arrive ready for operation Carefully inspect the shipping carton for any sign of damage If the carton is damaged immediately notify shipper s agent Remove the packing carton and supports being careful not to mar or damage the instrument Make a complete visual inspection of the counter checking for any damage or missing components Check that all switches and controls operate mechanically Report any damage to Phase Matrix immediately INSTALLATION There are no special installation instructions for these counters They are self contained bench or rack mount instruments which only require connection to a standard single phase power line for operation CAUTION To prevent damage to the counter verify that the voltage value T visible through the window in the fuse drawer see Figure 2 1 is correct for the available AC power input voltage and inspect the fuse to ensure that it is the correct type and that it matches the rating specified in Table 2 1 WARNING Disconnect the AC power cord before removing the fuse or changing the voltage selector setting 2 1 Phase Matrix Inc 585C amp 588C FUSE REPLACEMENT The fuse is located inside the rear panel power input module assembly see Figure 2 1 Use only the fuse types listed in Table 2 1 DRAWER VOLTAGE VOLTAGE SLOT SELECTOR SELECTOR WINDOW
4. Timebase Error in Section 3 CAUTION Do not attempt to repair or disassemble the microwave converter A N millimeter wave converter or time base oscillator assemblies Such actions void the counter s warranty Contact Phase Matrix or your sales representative if you think these assemblies require service WARNING Do not attempt to repair or dissemble the microwave converter Qe assembly This assembly contains beryllia beryllium oxide which Y if handled improperly could pose a health hazard COUNTER IDENTIFICATION This counter is identified by three sets of numbers a model number 585C or 588C serial number and a configuration control number CCN These numbers are located on a label affixed to the frame at the rear of the counter some units may have separate CCN and serial number labels The model number CCN serial number and the numbers of any options must be included in any correspondence regarding your counter A typical serial number label is shown in Figure 2 3 Phase Matrix Inc Model number Serial number CCN Model 585C Serial No 9207 1510 Made in U S A Figure 2 3 Typical CCN Serial Number Label 2 4 2 INSTALLATION FACTORY SERVICE If the counter is being returned to Phase Matrix for service or repair be sure to include the following information with the shipment e Name and address of owner e Model complete serial number and CCN of the counter e A
5. MIN PRF This key controls the minimum pulse repetition frequency of the pulsed signals that can be acquired and measured by the counter For example if a MIN PRE of 500 Hz is selected the counter only measures signals with a minimum pulse repetition frequency of 500 Hz or greater This parameter affects the acquisition speed indirectly by affecting two internal processes the time of waiting for a pulse at each frequency step in the frequency range search and the time of waiting for a pulse when taking measurements before declaring a signal lost condition CW signals can always be acquired and counted regardless of the specified MIN PRE Select MIN PRF in the range of 1 Hz to 100 kHz depending on the minimum pulse repetition frequency of the signal being measured The number can be entered in any fixed point format the units terminator determines the scale of the input number NOTE If the PRF of the input signal is less than the MIN PRF chosen erroneous measurements may be displayed KEYBOARD EXAMPLES CLEAR Press C to select the default value PRF DATA Press G G O to select a 500 Hz value PRF dB 3 14 3 OPERATION GPIB EXAMPLE Enter Send 0 18 MINPRF 500 HZ NLend to select a minimum pulse repetition frequency value of 500 Hz PULSE GENERATOR DELAY This key is used to control the delay from trigger of the output pulse from the optional internal delaying pulse generator The delay can
6. Models 585C amp 588C Pulsed CW Microwave Frequency Counters Operation Manual 585C CCN 5101 5104 588C CCN 5001 5003 Manual Assy Part Number 5585065 05 Manual Text Part Number 5580487 05 Printed in USA Sept 2008 Manual Prepared By TTW Rev 12 10 03 Warranty Phase Matrix Inc warrants this product to be free from defects in material and workmanship for one year from the date of delivery Damage due to accident abuse or improper signal level is not covered by the warranty Removal defacement or alteration of any serial or inspection label marking or seal may void the warranty Phase Matrix Inc will repair or replace at its option any components of this product which prove to be defective during the warranty period provided the entire unit is returned to Phase Matrix Inc or an authorized service facility In warranty units will be returned freight prepaid out of warranty units will be returned freight COLLECT No warranty other than the above is expressed or implied Certification Phase Matrix Inc certifies this instrument to be in conformance with the specifications noted herein at time of shipment from the factory Phase Matrix Inc further certifies that its calibration measurements are traceable to the United States National Institute of Standards and Technology Manual Change Information As Phase Matrix Inc continually improves and updates its products changes to the material covered by the manua
7. Y3FREQ VIFREQ V2FREQ DELTAF Frequency terminator NULL Hz kHz MHz GHz 5 8 5 PROGRAMMING Example To instruct the instrument to set a frequency high limit value of 12 3 GHz the following statement could be used Send 0 18 HIGHLIMIT 12 3 GHz PARAMETER MESSAGE 3 SAMPLERATE lt N S gt lt argument gt lt N S gt lt time terminator gt Time terminator NULL SEC MSEC Example To instruct the instrument to set the sample rate to 0 1 Hz the following statement could be used Send 0 18 SAMPLERATE 100 MSEC NLend PARAMETER MESSAGE 4 MEMORY lt NJ S gt lt memory instruction gt lt N S gt lt memory data gt Memory instruction INCREMENT DECREMENT lt memory location gt Memory location O lt hex digit gt lt hex digit gt lt hex digit gt lt hex digit gt Hex digit lt digit A B C D E F Memory data NULL 0 lt hex digit gt lt hex digit gt Example To instruct the instrument to change memory location 99AF to 3B the following statement could be used Send 0 18 MEMORY O99AF 03B NLend PARAMETER MESSAGE 5 STORE FETCH lt N S gt lt NUMBER gt Example To instruct the instrument to store or recall a counter setup in a specified storage register these statements could be used Send 0 18 STORE 03 NLend or Send 0 18 FETCH 03 NLend 5 9 Phase Matrix Inc 585C amp 588C 4 OUTPUT CONTROL MESSAGE OUTPUT lt SPACE gt lt output parameter gt Output parameter lt s
8. such as a printer without the need of an instrument controller To use the counter in talk only mode enter the GPIB address corresponding to the desired data output format as listed in Table 5 9 The receiver must be configured to the listen only mode to allow data to be transferred across the bus NOTE Address is composed of the binary value of the choices 32 Table 5 9 GPIB Addresses for Talk Only Mode Scientific Separate Header Dynamic Address 5 15 Phase Matrix Inc 585C 588C DATA INPUT AND OUTPUT SPEED INPUT SPEED It takes a specific amount of time for the counter to process input data error checking formatting changing the mode of operation etc To prevent the data rate of the bus from slowing down while the counter is processing input data the data is accepted as soon as it is available on the bus and is temporarily stored in a 256 character storage memory It is necessary to be aware of the difference between accepting data and complying with it If the counter is asked to output a reading before it is finished processing the input data the output does not reflect the newly entered data To prevent this sufficient programmed delays must be provided see the sample program formats on page 5 7 Bit 7 in the status byte can be used to determine if the counter has completed the processing of the GPIB command messages Refer to the section on the status by
9. 4 MT RES 0 05 Signal must be within 2 GHz of specified center frequency PULSE PERIOD Accuracy 3x1078 Timebase Error x PW Resolution 10 ns Range 250ns 1s Measurement Points 6 dB 1 5 dB 1 5 Phase Matrix Inc 585C amp 588C SPECIFICATIONS Continued PULSE WIDTH Accuracy 3x1078 Timebase Error x PW Resolution 10 ns Range 50ns 1s Measurement Points 6 dB 1 5 dB TCXO TIME BASE STANDARD Frequency 10 MHz Aging Rate lt 1x10 month Short Term Stability Temperature Stability Line Variation Warm up Time Output Signal External Time Base Input lt 1x 10 RMS for one second averaging time lt 1 x 1078 over the range 0 to 50 C lt 1x 107 10 line voltage change lt 5 minutes 10 MHz 1 V p p minimum into 50 Q 10 MHz 1 V p p minimum into 1 KQ HIGH STABILITY TIME BASE OPTION 5809 Frequency Aging Rate Short Term Stability Temperature Stability Line Variation Warm up Time 10 MHz lt 5 x 101 day after 72 hour warm up 1 x 10 year lt 1 x 101 RMS for one second averaging time lt 3x 10 over the range 0 to 50 C lt 2x 10 10 line voltage change Within 5 x 107 10 min after turn on at 25 C Within 1 x 107 30 min after turn on at 25 C 1 6 1 GENERAL INFORMATION SPECIFICATIONS Continued DELAYING PULSE GENERATOR OPTION 5810 Pulse Output Level Connector Trigger Input Level Pol
10. AUTOMATIC FREQUENCY MEASUREMENTS The Phase Matrix 585C and 588C Pulsed Microwave Frequency Counters can automatically measure the frequency of CW and repetitive pulse signals having pulse widths as narrow as 50 ns To measure the frequency of a CW signal apply the signal to the input connector that corresponds to the frequency being measured and select the appropriate band The counter then automatically finds the signal measures it and displays the measured frequency The average frequency of repetitive pulse signals is measured in much the same way as CW signals The only difference is that for pulse signals with pulse repetition frequencies of less than 2 kHz the minimum pulse repetition frequency must be entered into the counter using the MINPRF key on the front panel If the MINPRF is not set at or below the minimum pulse repetition frequency of the signal to be measured the counter is unable to lock on the signal As an example consider the signal shown in Figure 3 12 page 3 24 The signal is a 2 GHz signal with a pulse width of 1 ms and a pulse period of 2 ms Since the pulse repetition frequency is the reciprocal of pulse period the minimum pulse repetition frequency of the signal shown is 500 Hz Since this is less than 2 kHz it must be entered into the counter To enter a minimum pulse repetition frequency of 500 Hz into the counter press the MIN PRF key followed by the 5 key the O key and the 0 key then terminate the sequenc
11. CHASSIS SLIDE KIT INCLUDES RACK MOUNT KIT WITH HANDLES MSBSC ACCI L s as be ees Eee ee Re A ER ee hae oe e aa 4 7 CHASSIS SLIDE KIT INCLUDES RACK MOUNT KIT WITHOUT HANDLES MoUs C ALC Tis 6 eee e PSE ERK Se De Ee ee ee EES ee od 4 9 SECTION 5 PROGRAMMING REMOTE PROGRAMMING es yeso BE dl A Sw ER See 4d 5 1 GENERAL PURPOSE INTERFACE BUS 5300 bed aan See OY oS howe ran 5 1 GPIB FUNCTIONS IMPLEMENTED 924 8 2 e AA 5 1 DEVICE DEPENDENT MESSAGES LISTENER FEATURES es 4 8 ss a 5 3 OUTPUT MESSAGES TALKER FEATURES 3604004 lia be ee a eee OOH 8 5 11 STATUS BYTE 9 00 Dalai e a A OSE seo 5 12 SERVICE REQUEST MASK e inn 080408 206 E CEA a A 5 13 DEFAULT STATE DEVICE CLEAR FEATURES 2320090000309 Pe de 5 14 GPIB ADDRESS SELECTION 23 h4 i404 se be ER EERE O EE EGS 5 15 TALK ONLY MODES sa scesa 0440 84 bebe p2e 42a ee eS DEE 5 15 DATA INPUT AND OUTPUT SPEED o 3 4 48 4 a owas Ee SEG Ro 4 5 16 READING MEASUREMENTS 9 score DERERS DEH EDS OE SEES S 5 16 SECTION 6 OPERATIONAL VERIFICATION TESTS INTRODUCCION ropa ar id tod 6 1 EQUIPMENT REQUIREMENTS 0000 cece ec eee eee eee e 6 1 OPERATIONAL VERIFICATION TEST PROCEDURES 00 00000 ee 6 2 BAND 0 RANGE AND SENSITIVITY TEST CW ONLY 0000000 ee ee 6 2 BAND 1 RANGE AND SENSITIVITY TEST 6 4 BAND 2 RANGE AND SENSITIVITY TEST 6 5 BAND 2 AMPLITUDE DISCRIMINATION TEST 0 000000 cee ee eae 6 8 BAND 3 SUBBAND 1 RANGE AND SENSITIVITY TEST SBBC OPTION SON A A OR OS 6
12. Connect equipment as shown in Figure 6 7 2 Set the 585C 588C counter to Band 3 sub band 1 and resolution 3 3 Set the output frequency from the synthesized sweeper to 26 5 GHz 6 9 A Oy Sv Phase Matrix Inc 585C amp 588C Using the power meter set the output signal level from the sweeper to 20 dBm Apply the 26 5 GHz signal to the remote sensor verify proper reading and record the results Repeat steps 3 4 and 5 at 30 GHz 35 GHz and 40 GHz Set up the pulse generator to output a 50 ns wide TTL high signal with a 1 MHz repetition rate and apply the signal to the INHIBIT IN connector on the rear panel of the counter This signal gates signal threshold inside the counter and is used to simulate a pulsed signal Repeat steps 3 4 5 and 6 for the simulated pulsed signal and record the results 6 10 6 OPERATIONAL VERIFICATION TESTS OPERATIONAL TEST RECORD MODEL SERIAL NO DATE BAND 0 FREQUENCY RANGE AND SENSITIVITY TEST 100 Hz TO 250 MHz CW ONLY CW CW CW FREQ READINGS FREQ READINGS FREQ READINGS 100Hz ___ 100 kHz ___ 100 MHz kHz _ MHz _ 200 MHz 10kHz ___ 10 MHz BAND 1 FREQUENCY RANGE SENSITIVITY AND POWER TEST 250 MHz TO 1 GHz CW PULSE CW PULSE FREQ READINGS READINGS FREQ READINGS READINGS 250 MHz 700 MHz 300 MHz 800 MHz 400 MHz 900 MHz 500 MHz 1 GHz 600 MHz BAND 2 FREQUENCY RANG
13. RMS 100E3 190E3 _ 45 kH 500E 9 99 gt 7 NOTE To reduce the averaging error for this example the measurement averaging feature of the counter was used If it had not been used the averaging error would have been 450 kHz 3 OPERATION e GATE ERROR GE Worst Case lt lt ooo ee eee eee 20 kHz 0 01 GE GW Where GW pulse width AND inhibit signal 30 ns 0 01 GE 6f 5 20 kHz e DISTORTION ERROR DE Worst Case eee 60 kHz 0 03 BES PW 30 ns Where PW pulse width DE so aS eo itz 530 ns 30 ns e TOTAL ERROR SUM OF INDIVIDUAL ERRORS 136 kHz NOTE The total measurement error as calculated above is the worst case error The errors that make up the total error would not under normal circumstances be additive Errors in opposite directions would offset one another with the effect of reducing the total error MEASUREMENT ACCURACY WORKSHEET The following worksheet can be used to determine the maximum specified measurement error for a particular application To determine the specified maximum error select the desired operating parameters and use the formulas given to determine the magnitude of each type of error Variables Frequency F Pulse width PW Counter resolution RES SUM INDIVIDUAL ERRORS e TIMEBASE ERROR This error can be determined by accurately measuring the frequency a
14. Sweep VCO with VCO Power Amplifier On After this function is activated the counter waits for the user to enter the start frequency of the VCO sweep The previously entered start frequency and F1 are displayed in the frequency section and the pulse parameter section of the display respectively The special function stops in this state until the user enters a new start frequency or if the previously entered frequency is the required start frequency the user presses the kHz key to tell the special function to continue After the start frequency is entered the counter waits for the user to enter the stop frequency of the VCO sweep The previously entered stop frequency and F2 is displayed in the frequency section and the pulse parameter section of the display respectively The special function stops in this state until the user enters a new stop frequency or if the previously entered frequency is the required stop frequency the user presses the kHz key to tell the special function to continue When both the start and stop frequencies have been entered the display reverts to SPECIAL 41 The VCO sweeps continuously from F1 to F2 in 100 kHz steps until the function is terminated The sweep rate is controlled by the sample rate Maximum sweep rate may be obtained by disabling the sample rate Special Function 63 before calling this function If Fl and F2 are equal the VCO is set to that particular frequency The VCO power amplifi
15. The gate is therefore made four times longer to properly count the prescaled signal During signal acquisition the counter monitors the RF detector and when a signal is detected the RF gain is 3 19 Phase Matrix Inc 585C amp 588C adjusted to set the level of the IF 6 dB above threshold The signal is then counted After every measurement the RF gain is readjusted to ensure rapid tracking of a moving signal see Figure 3 9 YES SIGNAL ADJUST er SIGNAL PRESENT RF AMP GAIN gt ae ee PRESENT Figure 3 9 Band 1 RF Converter Lock Process Flow Band 2 RF Microwave Converter Frequency measurement in the microwave band is accomplished using a narrow bandpass microwave filter to eliminate all but the desired signal and then downconverting that signal to an IF of approximately 120 MHz Figure 3 10 is a block diagram of the Band 2 converter and Figure 3 11 is a flow diagram showing converter operation The microwave filter consists of two sections of Yttrium Iron Garnet YIG crystal material that produces a bandpass filter approximately 20 MHz wide whose center frequency is tunable from 1 GHz to 26 5 GHz IF OUTPUT BASIC o gt gt lt lt ATTEN SELECT COUNTER YIG Z A gt FILTER L A d gt DETECTOR BAND
16. counter Table 5 8 Output Message Formats Parameter Average Default State 01 Band 2 Center frequency 0 off Clear display Converter Activated Reset Delta F 50 MHz Display Enabled Dynamic off External reference Frequency limit high Off 20 5 GHz 585C or 26 7 GHz 588C Frequency limit low 900 MHz Header Hold Minimum pulse repetition frequency Multiply frequency Offset frequency Output Frequency measurement data Resolution 3 1 kHz Sample rate 50 ms Scientific Off Separate Off Special functions 00 All Cleared SRQmask Off Pulse Generator Gmode 0 Off Gdelay 50 ns Gwidth 1 us Gperiod 10 us Gincrement 1 us Gend 9 us Profile Off 5 14 5 PROGRAMMING GPIB ADDRESS SELECTION This counter employs a software selectable GPIB address which is stored in nonvolatile memory To verify the GPIB address enter Special Function 90 the counter displays the current GPIB address Press the CLEAR DISPLAY key to exit Special Function 90 without changing the GPIB address To change the GPIB address enter Special Function 90 followed by the desired GPIB address Since the GPIB address is stored in nonvolatile memory the counter always defaults to the last GPIB address selected TALK ONLY MODES The talk only modes enable the counter to continuously output data to other devices on the bus
17. 2 P INPUT REF DET IF 1 GHz to 20 HARMONIC RF AMPLITUDE THRESHOLD 26 5 GHz GENERATOR DISCRIMINATION x CIRCUIT POWER e VCO AMP YTF DRIVER AFC i f CPU Y Figure 3 10 Band 2 Block Diagram 3 20 3 OPERATION The actual process of signal measurement in the microwave band is accomplished using a series of steps 1 Search for the largest signal 2 Center the YIG on the largest signal 3 Calculate the harmonic number and required VCO frequency for the local oscillator LO 4 Adjust the IF gain 5 Measure the IE 6 Perform calculations 7 Output measurement results START SEARCH FOR o ore SIGNAL F 120 MHz DETERMINE COUNT IF LARGEST AND OUTPUT SIGNAL F NFyco Fig y CENTER YIG FILTER ON SIGNAL SIGNAL PRESENT Y CALCULATE NAND VCO FREQUENCY ADJUST FVCO AND Fyi TO MAINTAIN ADJUST IF IF AT 120 MHz GAIN ADJUST IF Figure 3 11 Band 2 Operation Flow Diagram During the search routine the counter selects the largest signal present within the selected or default range of the band 2 input During this routine the electronically tunable microwave bandpass YIG filter is being continuously stepped from its low to high limits The output from the YIG filter is applied to the mixer which is used as an RF detector The output from the mixer is applied to the video amplifie
18. 585C 588C counters conforms to the IEEE Code and Format conventions and the IEEE 488 1978 Standards With the GPIB interface the counter can respond to remote control instructions and can output measurement results via the IEEE 488 1978 bus interface At the simplest level the counter can output data to other devices such as a thermal printer In more sophisticated systems an instrument controller or computer can program the counter remotely trigger measurements and read results A quick reference list of GPIB commands is located in Appendix A at the end of this manual GPIB FUNCTIONS IMPLEMENTED The GPIB interface function subsets implemented in the 585C and 588C are listed and described in Table 5 1 Table 5 1 GPIB Interface Function Subsets Interface Function Subset Description SOURCE HANDSHAKE Complete capability ACCEPTOR HANDSHAKE Complete capability TALKER Basic talker serial poll talk only mode unaddress if MLA LISTENER Basic listener unaddress if MTA SERVICE REQUEST Complete capability REMOTE LOCAL Complete capability DEVICE CLEAR Complete capability DEVICE TRIGGER Complete capability 5 1 Phase Matrix Inc 585C amp 588C The 585C 588C counters thus have the capacity to provide the following capabilities in remote operation e Acceptance of device dependent messages to set the instrument measurement mode and parameters The input buffer can store up to 256 characters accep
19. Be cdi teow ith o eek nd a a el de ee eg iii MANUAL CHANGE INFORMATION so Lao ile Ae Bsa Be o Bed iii AAA AIR oh SS eg Dh IN ot El ys ans SP og dB og ces iv SAFETY AND HAZARD SYMBOLS sssaaa a hohe Aten oe aged Segre iv OVERALL SAFETY CONSIDERATIONS 24 5 4 46 eae ae A See ee Bane v SECTION 1 GENERAL INFORMATION INTRODUCTION Eris bora Goma oe AE Oe a A ae Bae ee ES 1 1 OPERATING CONDICIONS hens LI mca aoe na ee Re alah ge de eh 1 2 VENDES DON pedo abs inh o Se ate ica ge A 1 2 STORAGE wora E re eiii o Be o e SA ew ina 1 2 SPEC UMC AION Sc ii AA A cd Red ads ds da idad Ae 1 2 SECTION 2 INSTALLATION UNPACKING Sacro o ss tt ol 2 1 INSTALLATION S 2 a Y ED E AA IAS AE A E 2 1 EUSE REPLACEMENT somatie atu oboe OA RN RR e a ook Ai SOE 2 2 VOLTAGE SELECTION ly et aa a e A RIE ID dy 2 3 INCOMING OPERATIONAL CHECKOUT 4 04100 e ES ORS A 2 3 SERVICE INFORMATION joo alot at es es ee ER oo A A a ole 2 4 PERIODIC MAINTENANCE 2 Goa Bolle ok et Wh act A Oe ek ten ao de 2 4 COUIN TERIDENTIRICATION ea tant ett tend le Bie ee AAA Balan idl e 2 4 FACTORY SERVICE p ce axe oct bod bo beg eR AAAS A RO Re ee 2 5 SHIPPING INSTRUCTIONS 6 ave sical RAI A O A e 2 5 SECTION 3 OPERATION INTRODUCTION 45 uv RES ERAS A aS Beate Ser Ou ie iat Seer Pe ch nan te 3 1 FRONT PANEL CONTROLS INDICATORS AND CONNECTORS 3 1 STATUS DISEASE teh tg e Bod che whe e a E AAA 3 2 GPIBSTATUSINDIGATORS dh 0 De 0 Ge inc tt ae de lt Wee al ee 3 3 SIGNAL INPUT C
20. CODE 11 31 Pulse Generator Width 71 Delay Period Mode Init Local Delay 6 23 43 Test 52 MHz ms 24 Hz ns 44 Clear Data 53 Clear Display 54 This scan code cannot be seen on the display since it exits the keyboard test SPECIAL FUNCTION 06 PROM checksum Test This function generates the checksum for the PROM in the counter and compares it with the checksum table stored in the firmware If the checksum generated is correct the counter displays the word PASSEd on the front panel If the checksum is incorrect an error message is output to the display At the same time the error condition status bit in the GPIB serial poll status byte is set During checksum generation SPECIAL 06 is displayed ONE SHOT SPC INDICATOR ON SPECIAL FUNCTION 07 Display Counter Model Number This function enables the user to find out whether the counter is configured as a 585C or 588C counter It displays the appropriate model number on the front panel ONE SHOT SPC INDICATOR ON SPECIAL FUNCTION 08 External Timebase Select Selecting this function configures the counter to external timebase input mode The EXT annunciator is lit when the counter is in external timebase mode ONE SHOT SPC INDICATOR OFF 3 45 Phase Matrix Inc 585C amp 588C SPECIAL FUNCTION 09 Internal Timebase Select Selecting this function configures the counter to internal timebase mode The EXT ann
21. INSERT SLOT FUSE VOLTAGE SELECTOR INSERT Figure 2 1 Fuse and Voltage Selector Insert Locations Table 2 1 Fuse Types Line Voltage Fuse Type 100 120 VAC 1 5 A Slow blow 250 V 200 240 VAC 0 75 A Slow blow 250 V To access the fuse or the voltage selector insert a screwdriver into the fuse drawer slot gently push to the right and pull the fuse drawer out see Figure 2 2 To reinsert the fuse drawer push it slowly back into the power input module until it snaps into place 2 2 2 INSTALLATION TO REMOVE FUSE DRAWER TO REMOVE VOLTAGE SELECTOR INSERT GENTLY PUSH TO THE RIGHT GENTLY PULL FORWARD Figure 2 2 Fuse Drawer and Voltage Selector Insert Removal VOLTAGE SELECTION The voltage selector insert is located inside the rear panel power input module see Figure 2 1 The insert must be installed correctly for the available AC line voltage To change the voltage remove the fuse drawer as described on page 2 2 insert a screwdriver in the slot on the side of the voltage selector insert and gently pry the voltage selector insert out while pulling the tab on the voltage selector insert towards you Reinstall the voltage selector insert so the correct voltage is visible on the tab on the insert Slowly push the fuse drawer back into the power input module until it snaps into place INCOMING OPERATIONAL CHECKOUT Use the following procedure which can be performed without special tools or equipment to
22. The number can be entered in any fixed point format the units terminator determines the scale of the input number KEYBOARD EXAMPLES FREQ LIMIT CLEAR Press 0 0 to select the default value LOW DATA FREQ LIMIT GHz s Press C 2 G Cs 0 to select a 2 35 GHz value LOW FREQ LIMIT MHz Pes 0O O O O Oo select 3130 0 MHz 3 13 GH LOW truncated to 10 MHz resolution GPIB EXAMPLE Enter Send 0 18 LOWLIMIT 2 35 GHZ NLend to select a 2 35 GHz value FREQ LIMIT HIGH This key controls the high end of the frequency window that is searched for a signal in Band 2 Select the high frequency limit in the range of 900 MHz to 20 5 GHz for Model 585C and in the range of 900 MHz to 26 5 GHz for Model 588C The value entered is truncated to 10 MHz resolution This function is only available in Band 2 Frequency limit high must always be greater than frequency limit low 3 13 Phase Matrix Inc 585C amp 588C The number can be entered in any fixed point format the units terminator determines the scale of the input number KEYBOARD EXAMPLES FREQLIMIT CLEAR Press C C to select the default value HIGH DATA FREQ LIMIT GHz s Press C ED C 2 C to select a 3 2 GHz value HIGH FREQ LIMIT Press O EN C G G G 5 to select a 21090 MHz 21 09 GHz value truncated to 10 MHz resolution GPIB EXAMPLE Enter Send 0 18 HIGHLIMIT 3 2 GHZ NLend to select a 3 2 GHz value
23. be measured To simulate a pulsed signal apply an enable signal of the same width as the pulse to be measured to the INHIBIT IN connector on the rear panel A single measurement contains both averaging error and gate error Averaging measurements reduces averaging error by the square root of the number of measurements averaged If 100 measurements are averaged the averaging error is reduced by a factor of 10 Gate error and any residual averaging error is the difference in reading between the pulsed and non pulsed measurement of the same CW signal EXAMPLE Pulse frequency 2 GHz Pulse width 2 ms 1 Apply a CW signal to the counter at 2 GHz 25 MHz and record the displayed frequency This frequency is called F1 2 Apply a TTL signal with a pulse width of 2 ms at the INHIBIT IN connector on the rear panel Set the 585C 588C counter to average 99 readings The frequency displayed on the counter is called F2 3 Gate Error F2 Fl NOTE This procedure avoids errors associated with pulsed signal distortion and any possible pulling of the signal source It should be noted that by using Special Function 92 gate error can also be automatically calibrated out of the system for a given pulse width and frequency However the calibration procedure may result in additional errors for other pulse widths or frequencies For additional information on Special Function 92 see the Service Manual 3 37 Phase Matrix Inc 585C amp 5
24. be set in increments of 2 ns from a minimum of 74 ns values smaller than 74 ns may be entered but the minimum guaranteed is 74 ns to a maximum of 800 ms using either the keyboard or GPIB Entries made to a resolution finer than 2 ns are rounded down to the closest 2 ns value KEYBOARD EXAMPLES PULSE GEN CLEAR Press E 0 to select the default value 50 ns DELAY DATA Press 1 e 0 E to set delay to 100 ns DELAY GPIB EXAMPLES Enter Send 0 18 GDELAY 100 NS NLend to set delay to 100 ns Enter Send 0 18 GDELAY 5 MS NLend to set delay to 5 ms PULSE GENERATOR PERIOD This key is used to control the period of the output signal from the internal delaying pulse generator In MODES 1 and 3 the period of the signal is determined by the trigger source so this parameter only applies when the pulse generator is in the continuous trigger mode MODE 2 The pulse period can be set in increments of 50 ns from a minimum of 100 ns to a maximum of 800 ms using either the keyboard or GPIB Entries made to a resolution finer than 50 ns are rounded down to the closest 50 ns value KEYBOARD EXAMPLES PULSE GEN CLEAR Press 0 C to select the default value 10 us DELAY DATA PULSE GEN Press 1 e e tosetthe period to 100 ns DELAY PULSE GEN ms Press 1 o o _ toset the period to 100 ms PERIOD 3 15 Phase Matrix Inc 585C 588C GPIB EXAMPLES
25. called one shot action keys These are DISPLAY DELAY INIT LOCAL PULSE PERIOD PULSE WIDTH RESET and TRIG DISPLAY DELAY causes the counter to display the current delay time of the internal delaying pulse generator in the parameter display e INIT LOCAL when the counter is in local mode this key causes the counter to be initialized to the power on state When the counter is in remote mode the INIT LOCAL key causes a return to local mode unless a GPIB local lockout is active 3 16 3 OPERATION e PULSE WIDTH turns the pulse width measurement on or off The result is displayed in the parameter display PULSE PERIOD turns the pulse period measurement on or off The result is displayed in the parameter display NOTE When DISPLAY DELAY PULSE WIDTH or PULSE PERIOD are enabled the frequency display is limited to 100 kHz resolution and the parameter is displayed in the three rightmost digits the parameter display If Special Function 69 is active when the parameter is enabled frequency is not displayed and the parameter occupies the entire display e RESET resets the converter and restarts the signal acquisition process If a signal is found a measurement is taken even if the counter is in HOLD e TRIG begins a new measurement cycle If a measurement cycle is in progress it is aborted and a new cycle is begun THEORY OF OPERATION The Phase Matrix 585C 588C Pulsed Microwave Frequency Counters ar
26. check the operation of the counter 1 Before connecting power to the instrument ensure the correct fuse is installed and that the voltage selector insert is set properly 2 Connect the power cord to an appropriate single phase power source The ground terminal on the power cord plug must be properly grounded 3 Turn the POWER switch on All LEDs and annunciators should light for about two seconds The counter should then display all zeros indicating that the automatic self check has been successfully completed SPECIAL 4 Press o The display should read 200 000 1 200 MHz FUNC SPECIAL 5 Press 2 The display should read all 8s All annunciators and decimal points FUNC should be lit 2 3 Phase Matrix Inc 585C amp 588C SPECIAL 6 Press 0 Ls Each display segment should light in turn adjustable by the front FUNC panel SAMPLE RATE control SPECIAL 7 Press 4 Each digit should light in turn adjustable by the front panel C C SAMPLE RATE control This completes the incoming operational checkout procedure SERVICE INFORMATION PERIODIC MAINTENANCE No periodic maintenance is required However to maintain accuracy it is recommended that the counter be recalibrated every 12 months The specific calibration interval may be redefined depending upon the measurement accuracy required For sample measurement error calculations for both 6 and 12 month calibration intervals see
27. complete description of the problem Under what conditions did the problem occur What was the signal level What equipment was attached or connected to the counter Did that equipment experience failure symptoms e Name and telephone number of someone familiar with the problem that may be contacted by Phase Matrix for any further information if necessary e Shipping address to which the counter is to be returned Include any special shipping Instructions Pack the counter for shipping as detailed below SHIPPING INSTRUCTIONS Wrap the counter in heavy plastic or kraft paper and repack in original container if available If the original container cannot be used use a heavy 275 pound test double walled carton with approximately four inches of packing material between the counter and the inner carton Seal carton with strong filament tape or strapping Mark the carton to indicate that it contains a fragile electronic instrument Clearly mark the carton to indicate that the contents were manufactured in the U S A Ship the carton to the Phase Matrix address on the cover of this manual 2 5 Phase Matrix Inc 585C amp 588C This Page Intentionally Left Blank 2 6 OPERATION INTRODUCTION This section lists the counter controls connectors and indicators explains how each counter function operates and provides some general measurement considerations NOTE A carrying case a tool kit and rack mounting kits that are availa
28. improved aging rates and temperature stability The following are sample calculations for determining the measurement error of the counter based on the timebase aging rate Given Aging rate 1 x 10 month Calibration interval 6 months Frequency 20 GHz 2 x 101 Hz 3 33 Phase Matrix Inc 585C amp 588C Calculation Error aging rate x cal interval x frequency 7 x 6 mo x 2x 10 Hz sA xe mo 6 x 10 x 2 x 10 Hz 12 x 10 Hz 12 kHz Counter measurement after a six month calibration interval could have an error of 12 kHz in measuring a 20 GHz signal Given Aging rate 1 x 10 month Calibration interval 12 months Frequency 20 GHz Calculation Error aging rate x cal interval x frequency aT me x 12 mo x 2 x 10 Hz mo 12x10 x 2x 10 Hz l I 24 x 10 Hz 24 kHz Counter measurement after the recommended 12 month calibration interval could have an error of 24 kHz in measuring a 20 GHz signal due to timebase aging These examples are to illustrate error due to the timebase aging rate only Actual calculations of measurement error must include the other sources of error discussed in the following text AVERAGING ERROR This error is caused by the relative timing between the gate and the incoming signal and results in an uncertainty of 1 count in the least significant digit of each measurement If the counter resolution is s
29. missing parameter 40 Non numeric parameter value 41 Wrong frequency terminator 3 60 3 OPERATION ERROR NUMBERDEFINITION 42 43 44 45 46 47 48 49 50 51 52 53 60 61 80 81 82 83 84 85 86 90 Wrong time terminator Wrong output argument Numeric argument syntax error Numeric mantissa has too many digits Numeric exponent has too many digits Hex data should precede with a zero No hex memory address specified Illegal hex data entry Illegal hex address entry Special Functions 72 and 73 not supported via GPIB use store and fetch commands Illegal entry Access to this function blocked by memory protect switch RAM fault ROM checksum error ADDR 3000 to FFFF Invalid pulse period Invalid pulse width Invalid pulse delay Invalid combination of pulse parameters width delay gt period Invalid mode selected for internal delaying pulse generator Invalid profile increment Invalid profile end No key release detected 3 61 Phase Matrix Inc 585C amp 588C ERROR NUMBERDEFINITION 91 Option not installed 92 Band 3 option in a 585C unit 94 Nonvolatile memory failure 99 No IF detected EXT FREQ ASSY OPTION 5804 LO x12 PWR AMP MULTIPLIER A107 PULSE GENERATOR OPTION 5810 REAR PANEL BAND 3 INPUT 26 5 170 GHz TRIGGER IN DIPLEXER t DIVIDE BY N TRIGGER J1 REMOTE CHARO 5 TO 6 GHz 13dBm 600 MHz 50 dBm
30. pressing the SPECIAL key followed by the CLEAR DATA key or by pressing the SPECIAL key followed by the O key and then the O key again STOP RESET SPC INDICATOR ON SPECIAL FUNCTION 45 Restore Normal Counter Operation This function reverses the action taken when Special Function 44 is activated The function returns the counter to normal operation A reset is generated and the STOP ON OFF status bit is cleared when this function is activated STOP RESET SPC INDICATOR OFF SPECIAL FUNCTION 46 Display and or Alter Memory CAUTION Care must be used when operating Special Function 46 Although the counter cannot be damaged by this function improper operation of it can affect the counter calibration For this reason access to this function is blocked by an internal memory protect feature Attempting to access this function with the memory protected causes the counter to display ERROR 53 This function allows the user to display and or alter any memory location The counter continues its normal operations when performing this function unless Special Function 44 has previously been activated 3 49 Phase Matrix Inc 585C 588C In the local mode the keys on the keyboard take on different meanings after Special Function 46 is activated The following are the definitions of the keys when this function is enabled e All number keys remain number keys e GHz key hexadecimal digit A e MHz key hexade
31. set up the counter according to the information stored in the register specified During this time REG N is displayed on the front panel where N is the register number entered When the counter finishes setting the counter up a reset is generated ONE SHOT RESET SPC INDICATOR OFF SPECIAL FUNCTION 74 Store Current Reading as Frequency Offset When this function is activated the counter assigns a negative value to the last input frequency reading and enters it into the frequency offset register overwriting any previously entered frequency offset The last input frequency in this case means the actual frequency of the input signal not the frequency displayed on the front panel which may be affected by a frequency multiplier or another special function The counter displays the difference between the last input frequency and the current one subject to any other functions activated It continues to do so until the SPECIAL FUNC 83 and CLEAR DATA keys are pressed The OFS annunciator is turned on when this function is activated ONE SHOT SPC INDICATOR OFF 3 54 3 OPERATION SPECIAL FUNCTION 75 Display IF Frequency Readings When this function is activated the counter assigns a negative value to the local oscillator LO frequency and enters it into the frequency offset register overwriting any previously entered frequency offset The counter then subtracts the LO frequency from the input frequency and displays t
32. slides for easier access The rack mount brackets do not have handles Figure 4 6 shows one rack mount one slide and the mounting hardware provided in the kit Two rack mounts two slides and mounting hardware for both sides of the instrument are included Figure 4 6 Chassis Slide Kit M585C ACC102 CHASSIS SLIDE KIT M585C ACC102 2011124 01 585C PARTS LIST 2011124 01 588C Reference Phase Matrix Designator Description Part Number 1 SLIDE CHASSIS 370QD 24 INCH 5000366 00 2 RACK MOUNT W O HANDLES GRAY 3 50 INCH 5210433 12 3 BRACKET RACK MOUNT SLIDE 5210953 01 4 NUT FLANGE 8 32 5210441 01 5 SCREW FLATHEAD X REC 100 SLFLKG 8 32 X 5 16 5149001 05 6 SCREW PANHEAD X REC SLFLKG 8 32 X 1 4 UNC 5124008 04 7 HARDWARE KIT RACK MOUNT US 2010414 01 8 HARDWARE KIT RACK MOUNT METRIC 5000262 00 9 MOUNTING KIT BRACKET SLIDES W HARDWARE 5000277 00 4 9 Phase Matrix Inc 585C amp 588C CHASSIS SLIDE KIT M585C ACC102 2011124 01 585C PARTS LIST continued 2011124 01 588C Reference Phase Matrix Designator Description Part Number 10 NUT BAR 10 32 5000278 00 11 SCREW PANHEAD X REC 10 32 X 9 16 UNF 5120010 59 12 SCREW PANHEAD X REC 8 32 X 3 8 UNC 5120008 06 13 WASHER FLAT CRES NO 8 5160008 00 14 NUT KEPS 8 32 UNC 2B 5186008 32 15 DRAWING SLIDE ASSY CHASSIS W O HANDLES 5520023 00 4 10 PROGRAMMING REMOTE PROGRAMMING GENERAL PURPOSE INTERFACE BUS The GPIB interface of the
33. 13 are applied to Band 2 the counter automatically finds the signal at 6 GHz since it is the largest signal If it is desired to measure the signal at 6 3 GHz set the frequency limit low to 6 2 GHz and the frequency limit high to 6 4 GHz This prevents the counter from seeing either the signal at 6 GHz or the signal at 6 6 GHz The counter also provides a center frequency mode which is used in combination with AF In this mode the counter searches around the entered center frequency the entered AE For example if the center frequency in Figure 3 14 page 3 26 is set to 8 GHz and AF is set to 1 GHz the counter searches 1 GHz around the center frequency and measures the signal at 8 GHz 3 25 Phase Matrix Inc 585C 588C INPUT POWER dBm 20 SEARCH RANGE gt 10 4 AF gt 4 AF gt 0 a 10 20 gt 30 FREQUENCY g GHz 7 8 8 4 9 ZN CENTER FREQUENCY Figure 3 14 Center Frequency PULSE PROFILING Automatic pulsed frequency measurements determine the average frequency across a pulse In some cases however additional information may be required For example a pulsed magnetron may exhibit substantial frequency shift near the leading and trailing edges of the pulse Other specialized pulsed signals are intentionally ramped in frequency Repetitive frequency variations across a pulsed signal can easily be measured using the counter and either an
34. 3 17 automatically perform the following steps 1 Set MINPRF to default 2 kHz using the MINPRF key 2 Connect your trigger source to the trigger input on the rear panel 3 Set the measurement window to 5 us using the Pulse Generator Width key 4 Set the delay to the minimum delay of 75 ns using the Pulse Generator Delay key 3 28 3 OPERATION 5 Set up the pulse generator to trigger on the external signal by pressing the Pulse Generator Mode key and entering 1 6 To minimize signal acquisition time set frequency limit low at 4 5 GHz and frequency limit high at 5 5 GHz 7 Put the counter in hold by turning the sample rate control fully clockwise 8 Enable the auto profile function by pressing Special Function 77 The counter displays Inc increment in the three least significant digits of the display 9 Enter a measurement window increment of 5 us 10 The counter displays End in the three least significant digits of the display Enter an end delay of 99 ps The counter automatically finds the signal and displays the average frequency over the 5 us measurement window beginning 75 ns after the rising edge of the pulse Press the Trig key to increment the measurement window by 5 us Each time the Trig key is pressed the measurement window is incremented by 5 us until the end delay is reached Press the Display Delay key to display the delay Frequency profiling can be easily automated us
35. 88C REDUCING DISTORTION ERROR Since distortion error is most significant on the edges of the pulse it may be reduced by using the counter inhibit feature to measure only in the middle of the pulse however measuring only the middle of the pulse narrows the gate and gate error increases For pulses less than 70 to 80 ns this may add more error than it removes The performance test section of the service manual describes a method of determining the magnitude of this error that can be used to determine the improvement in accuracy achieved by using the inhibit function CALCULATING MEASUREMENT ACCURACY The following is a sample calculation for determining the maximum specified measurement error for a typical pulse frequency measurement Given Frequency 18 GHz Pulse width 530 ns Resolution 100 kHz TIMEBASE ERROR TBE Based on 6 Hz error from 10 MHz timebase 10 8 kHz TBE 6 Hz 10 MHz 18 GHz 10 8 kHz NOTE The direction of the timebase error is not specified so it is not known whether the timebase error caused the indicated reading to be higher or lower If the actual frequency of the timebase was 6 Hz high then its period would be reduced and the counter would indicate a lower frequency RMS AVERAGING ERROR AD eieiei iE nee RES AE AMS 24 22 a GW AVG Where RES specified counter resolution GW pulse width AND inhibit signal 30 ns and AVG number of measurements averaged AE
36. 9 OPERATIONAL TEST RECORD er e 6 11 Phase Matrix Inc 585C amp 588C This Page Intentionally Left Blank GENERAL INFORMATION INTRODUCTION The Phase Matrix 585C and 588C Pulsed Microwave Frequency Counters are microprocessor based multifunction instruments used for both CW and pulsed microwave measurements They can automatically measure the frequency of repetitive pulse signals as narrow as 50 ns Both models can also automatically measure pulse widths from 50 ns to 1 second and pulse periods from 250 ns to 1 second to a 10 ns resolution Additionally with an optional built in delaying pulse generator the 585C and 588C can profile pulsed or chirped signals with measurement windows as narrow as 15 ns No manual switching is required to measure CW or pulsed signals The frequency range of the 585C is 100 Hz to 20 GHz The frequency range of the 588C is 100 Hz to 26 5 GHz and is extendible by option up to 170 GHz Band 0 100 Hz to 250 MHz is for CW measurements only The unique YIG preselector available only on Phase Matrix counters enables frequency selective measurements and provides superior burnout protection All major functions are controlled through the 25 button functionally grouped keyboard Information is presented for viewing on a twelve digit sectionalized display and a 20 message annunciator bank Microprocessor control and the unique architecture employed offer all the major counter functions such as freq
37. CCESSORY DESCRIPTION 010 Carrying Case 101 Chassis Slide kit includes Rack Mount kit with handles 102 Chassis Slide kit includes Rack Mount kit without handles 890 Frequency Extension Cable kit 031 Operation Manual one supplied with each instrument 032 Operation and Service Manual 022 Rack Mount kit without handles 091 Remote Sensor 26 5 GHz 40 GHz WR 28 092 Remote Sensor 40 60 GHz WR 19 093 Remote Sensor 60 GHz 90 GHz WR 12 094 Remote Sensor 90 GHz 110 GHz WR 10 1 8 1 GENERAL_ INFORMATION OPTIONS AND ACCESSORIES Continued ACCESSORY DESCRIPTION 095 Remote Sensor 50 GHz 75 GHz WR 15 096 Remote Sensor 33 GHz 50 GHz WR 22 097 Remote Sensor 26 5 GHz 50 GHz 2 92 mm coax SMA compatible 098 Remote Sensor 110 GHz 170 GHz WR 6 021 Rack Mount kit with handles 043 Service Kit NOTES O All formulas are written in fundamental units Hz sec etc MV is the maximum video amplitude in dBm SL is the input signal level in dBm FV is the frequency component of the video in Hz GW is the logical AND of pulse width and inhibit signal minus 30 ns PW is pulse width of the incoming signal in seconds PP is the period of the input signal in seconds RES is the resolution in Hz up to 1 MHz Above 1 MHz only the displayed resolution changes the internal resolution remains at 1 MHz AVG is the number of measurements averaged FH is the difference between Frequency Limit High and Frequency Limit Low in
38. CROWAVE INPUT OUTPUT A A SIGNAL GENERATOR DELAYING 000 PULSE GENERATOR A MODULATION TRIGGER OUTPUT Ooa wo o OUTPUT O O 6 0O o J e 0000 TRIGGER TTL OUTPUT INPUT PULSE External pulse generator is not required if Option 5810 Internal Delaying Pulse Generator is installed Figure 3 19 Time Varying Signal Measurement Test Setup With the equipment set up as shown in Figure 3 19 the signal generator provides a repetitive frequency step square wave modulation to the VCO under test The trigger output from the signal generator triggers the delaying pulse generator which in turn provides a measurement window to the counter The counter measures the VCO during this measurement window Changing the delay time of the delaying pulse generator moves the measurement window and allows the frequency of the VCO to be measured at any point in time relative to the trigger from the signal generator Using the optional internal delaying pulse generator further simplifies the setup For this setup the trigger from the signal generator is connected directly to the trigger input on the counter and the internal delaying pulse generator provides the measurement window FREQUENCY AGILE PULSE MEASUREMENTS Another type of measurement is that of a repetitive sequence of pulses that differ in frequency In this case it is desirable to measure the frequency of each pulse in the sequence separately The same test setup as shown in Figure 3 19 is required w
39. E SENSITIVITY AND POWER TEST 1 GHz TO 20 26 5 GHz CW PULSE CW PULSE FREQ READINGS READINGS FREQ READINGS READINGS 1 GHz 15 GHz 3 GHz 18 GHz 6 GHz 20 GHz 10 GHz 588C 12 4 GHz 22 GHz 24 GHz 26 5 GHz BAND 2 AMPLITUDE DISCRIMINATION TEST CONDITIONS F1 gt F2 BY 15 dB OR MORE F1 F2 PASS FAIL 3 GHz 3 1 GHz 6 GHz 6 1 GHz 12 GHz 12 1 GHz 17 9 GHz 18 GHz BAND 3 1 FREQUENCY RANGE AND SENSITIVITY TEST 26 5 GHz TO 40 GHz 588C WITH OPTION 5804 ONLY CW PULSE CW PULSE FREQ READINGS READINGS FREQ READINGS READINGS 26 5 GHz 35 GHz 30 GHz 40 GHz 6 11 Phase Matrix Inc 585C amp 588C This Page Intentionally Left Blank
40. Enter Send 0 18 GPERIOD 100 MS NLend to set period to 100 ms Enter Send 0 18 GPERIOD 100 US NLend to set period to 100 ps PULSE GENERATOR WIDTH This key is used to control the output pulse width for the optional internal delaying pulse generator The pulse width can be set in 2 ns increments from a minimum of 24 ns to a maximum of 800 ms using either the keyboard or GPIB Entries made to a resolution finer than 2 ns are rounded down to the closest 2 ns value KEYBOARD EXAMPLES PULSE GEN CLEAR Press 0 3 to select default value 1 us WIDTH DATA PULSE GEN ns Press 5 UN to set width to 50 ns WIDTH GPIB EXAMPLES Enter Send 0 18 GWIDTH 50 NS NLend to set width to 50 ns Enter Send 0 18 GWIDTH 5 MS NLend to set width to 5 ms A FREQ This key controls the search range for the center frequency function It defaults to a range of 50 MHz but can be set from 0 to the full range of the selected band in increments of 10 MHz AF is only available in Band 2 The counter searches AF around the center frequency Setting AF to zero is a special case If AF is zero the counter does not search for the signal The YIG filter is moved to the entered center frequency and if a signal is present it is measured Since the counter does not search for the signal when AF equals zero the signal acquisition time is effectively eliminated ONE SHOT ACTION KEYS The remaining keys are
41. Generator 1 MHz Wavetek 801 Pulse Modulator 1 GHz to 2 GHz Agilent 8731B Pulse Modulator 2 GHz to 18 GHz Agilent 11720A Pulse Modulator 3 dB Attenuator 18 GHz to 26 5 GHz 950 MHz to 26 5 GHz Narda Weinschel 214DS Cable Kit Phase Matrix Remote Sensor 26 5 to 40 GHz Phase Matrix OPERATIONAL VERIFICATION TEST PROCEDURES BAND 0 RANGE AND SENSITIVITY TEST CW ONLY DESCRIPTION This test verifies counter operation from 100 Hz to 250 MHz at 20 dBm 0 063 V p p into 50 2 The oscilloscope is used to set signal levels below 10 MHz and the power meter is used to set signal levels at 10 MHz and above Test setup 1 covers the frequency range from 100 Hz to 10 MHz and test setup 2 covers the range from 10 MHz to 250 MHz EQUIPMENT Frequency synthesizer Agilent 3325A Synthesized Sweeper Agilent 83640B Power meter Agilent 437B Power sensor Agilent 8481A Oscilloscope Tektronix 2445 6 2 6 OPERATIONAL VERIFICATION TESTS TEST SETUP 1 PROCEDURE 1 Connect equipment as shown in Figure 6 1 lt FREQUENCY 10 MHz 10 MHz IN OUT 585C 588C COUNTER SYNTHESIZER Qe lo O 50 Q 2 7 TERMINATION Figure 6 1 Band O Range and Sensitivity Test Setup 100 Hz to 10 MHz 2 Set the 585C 588C counter to Band 0 and select resolution 2 3 Set the output frequency from the synthesizer
42. Hz MINPRF is the specified instrument MINPRF in Hz up to 1 kHz Above 1 kHz MINPRF is 1 kHz In Band 3 if FM Chirp is gt 150 MHz and nonsymmetrical the measured frequency is a function of average frequency and geometric center frequency TTL levels have a maximum low of 0 4 and a minimum high of 2 4 In Internal Trigger Mode pulse delay is measured from the rising edge of the Internal Trigger Output to the Pulse Output In External Trigger Mode pulse delay is measured from either the rising or the falling edge software selectable of the External Trigger Input to the Pulse Output 1 9 f Phase Matrix Inc 585C amp 588C DECLARATION OF CONFORMITY Application Of Council Directive 89 336 EEC Standards to which Conformity is Declared EMC ENS50011 EN50082 1 Standards to which Compliance is Declared Safety IEC 1010 1 1990 Manufacturer s Name Manufacturer s Address Type of Equipment Model Name s Tested By Project Engineer Reviewer Phase Matrix Inc 109 Bonaventura Dr San Jose California 95134 Frequency Counter 585C 588C and 595A 598A Rockford Engineering Services Inc 9959 Calaveras Road Sunol CA 94586 USA Mr Bruce Gordon and Leo Hernandez Mr Michael Gbadebo P E I the undersigned hereby declare that the equipment specified above conforms to Directives and Standards listed For Phase Matrix Name Pete Pragastis Title President Signature Date
43. ITION 01 02 03 04 05 06 07 08 09 10 11 12 13 14 15 16 17 Key pushed not function key Lower limit higher than high limit Frequency limits and A frequency entries only supported in Band 2 Center frequency entries only supported in Band 2 and Band 3 Center frequency entry outside current band range No valid data in storage registers for recall feature Converter unable to lock on signal during special Illegal delta frequency entry Illegal register entry Illegal band entry Illegal subband entry Illegal resolution entry Illegal special function entry Illegal average entry Illegal multiplier entry Illegal frequency offset entry Illegal center frequency entry ERROR NUMBERDEFINITION 18 19 20 21 Illegal MINPRF entry Illegal low limit entry Illegal high limit entry Illegal sample rate entry 3 59 Phase Matrix Inc 585C amp 588C 22 Illegal SRQ numter entry 23 Illegal GPIB address 24 Illegal VCO frequency 1 entry 25 Illegal VCO frequency 2 entry 26 Illegal YIG frequency 1 entry 27 Illegal YIG frequency 2 entry 28 Illegal YIG DAC frequency entry 29 Frequency overflow due to multiplier 30 Pulse parameters measurements greater than specified MINPRF 31 GPIB input message too long 32 GPIB message starts with a number 33 GPIB message starts with a wrong number 34 Unidentified word found 35 Word misspelled 36 Missing space 37 Wrong mode argument 38 Parameter out of range 39 Command is
44. KEYS USED WITHOUT TERMINATOR BAND This key controls the frequency measurement range Select the appropriate band according to Table 3 2 Table 3 2 Band Key 100 Hz to 250 MHz 250 MHz to 1 GHz 1 GHz to 20 GHz Model 585C 1 GHz to 26 5 GHz Model 588C 26 5 to 170 GHz Optional Model 588C only KEYBOARD EXAMPLES BAND CLEAR Press 0 C to select the default band DATA BAND Press C to select Band 2 3 8 3 OPERATION GPIB EXAMPLE Enter Send 0 18 BAND 2 NLend to select Band 2 SUBBAND Called using BAND key This parameter controls the frequency measurement range of Band 3 It is set according to the remote sensor being used Select the appropriate subband per Table 3 3 Table 3 3 Subband Selection Subband Range GHz Subband Range GHz 26 5 to 40 60 to 90 33 to 50 75 to 110 40 to 60 90 to 140 50 to 75 110 to 170 KEYBOARD EXAMPLES BAND CLEAR Press 0 G 0 to select default subband DATA BAND Press C to select Band 3 subband 4 BAND CLEAR Press 0 0 to display the band without changing it DISPLAY GPIB EXAMPLES Enter Send 0 18 BAND 3 SUBBAND 4 NLend to select Band 3 subband 4 Enter Send 0 18 SUBBAND 4 NLend to select subband 4 if counter is already in Band 3 This command does not automatically set counter to Band 3 3 9 Phase Matrix Inc 585C amp 588C PULSE GENERATOR MODE This ke
45. MESSAGE INITIALIZE RESET TRIGGER CLEAR DISPLAY Example To instruct the instrument to begin a new signal acquisition process the following statement could be used Send 0 18 RESET NLend 2 MODE MESSAGE lt mode name gt lt space gt lt mode position gt Mode name WIDTH PERIOD HOLD EXTERNAL SCIENTIFIC SEPARATE HEADER DYNAMIC Mode position ON OFF 1 0 DEFAULT Example To instruct the instrument to an external reference the following statement would be used Send 0 18 EXTERNAL ON NLend 3 PARAMETER MESSAGE lt parameter message 1 gt lt parameter message 2 gt lt parameter message 3 gt lt parameter message 4 gt lt parameter message 5 gt PARAMETER MESSAGE 1 lt parameter 1 gt lt N S gt lt argument gt Parameter 1 BAND SUBBAND RESOLUTION SPECIAL AVERAGE MULTIPLIER SQRMASK Argument DEFAULT lt number gt Number lt NULL gt lt mantissa gt lt exponent gt Mantissa lt digit gt lt digit string gt lt digit digit string digit digit string gt Exponent NULL E lt NULL gt lt digit digit string gt Example To instruct the instrument to accept an averaging value the following statement could be used Send O 18 AVERAGE 70 NLend PARAMETER MESSAGE 2 lt parameter 2 gt lt N S gt lt argument gt lt N S gt lt frequency terminator gt Parameter 2 OFFSETFREQ HIGHLIMIT LOWLIMIT MINPRF CENTERFREQ YIFREQ Y2FREQ
46. ON Default is OFE e DEFAULT Outputs data in default format The fixed fields are 16 characters long for the header and argument and 5 long for the terminator When none of the output formatting features above are turned on numbers are right justified letters are left justified blanks are filled 5 11 Phase Matrix Inc 585C amp 588C Example The counter is measuring a 12 34 GHz pulsed signal with 98 ns width and 14 567 ms period The operator enters the following messages through the controller RESOLUTION 6 OUTPUT FREQ AND WIDTH AND PERIOD The output for each message format is listed in Table 5 7 b blank Table 5 7 Output Message Formats Parameter Default bbbbb12340000000 bbbbb0 000000100 bbbbb0 000014570 CR LF SCIENTIFIC on bbbbbbbb12 340E 9 bbbbbbbbbb100E 9 bbbbbbbb14 57E 6 CR LF DYNAMIC on 34E9 100E 9 14 57E 6 CR LF SEPARATE on 2 34E9 CR LF 100E 9 CR LF 14 57E 6 CR LF HEADER on FREQUENCY 12 34 GHz CR LF WIDTH 100 NSEC CR LF PERIOD 14 57 USEC CR LF If the counter is searching zero data is output to the controller on all results once every search loop If the counter has found a signal a measurement result is output only once When the instrument is in HOLD therefore the user must trigger the counter before sending another talk address Otherwise since it has no data to output the counter holds indefinitely STATUS BYTE Both the 585C and 588C counters maintain a one byte reg
47. ONNEC TOR Sa CERA akan A AN ee ed 3 4 REAR PANEL CONTROLS AND CONNECTORS Socio dea ie La wa 3 4 INSTRUMENT DERADLE T SELFTINGS i ranir e E ARA eco setts gies 3 6 KEYBOARD OPERATION Dic a a 3 7 NUMERICENTR ERES ye Gay de at ia A A la es 3 7 TERMINATOR RE rar o ai Sora o Ao a Sa poi Dae ge Be Thee et i al em as am 3 7 Phase Matrix Inc 585C 588C CLEAR DISPLAY AND CLEAR DATA KEYS 26 045 kaa oan eee eo wo 4 3 8 PARAMETER CALL REYS ouela paa 24 6 o wee eg soe eden da whee og 3 8 THEORY OF OPERA MOM G sos ata oe oe eS ee Re Hh ee Sh ead 3 17 FUNCTIONAL DESCRIPTION 4 2 5 4 34 9 amp eee Bak ee Ow Ow ee we wo 3 17 SIGNAL MEASUBEMENIS 444 2 de he 04454 84s ew AE WEEE A 3 23 AUTOMATIC FREQUENCY MEASUREMENTS cu sce gk a ok ae we Bee 3 23 TECHNIQUES FOR IMPROVING ACCURACY 3 gs eg t eae ae bb eR Ho EGS 3 36 SPECIAL FUNCTION DIRECTORA s scs e944 ack a Ske gta Ce SN eS 3 41 ACTIVATION OF SPECIAL FUNCTIONS eos hs oe 44 3 a dew 3 43 ERROR MESSAGES oos 29 phe ae eh EPR AMER A E OA REE RE GH S 3 59 SECTION 4 ACCESSORIES INTRODUCTION a caido tra rin adria REE ERED Oe ERE GH A HG EE 4 1 CARRYING CASE MGIC ACCOUTO a chug eh epee RP ERA A a OEE GEA 4 2 RACK MOUNT KIT WITH HANDLES MATE ACCOLL zaa oe ee ee ERE TRS Cee eee ee eee eee ee 4 3 RACK MOUNT KIT WITHOUT HANDLES MISICAAQUDIZ a ek eke ERROR AOE SAS DAG EAE ANNA ORE BA 4 4 SERVICE KIT ADJUSTMENT AND TROUBLESHOOTING TOOL KIT MOC Ot he eth a ORAS Se Ee RGA ER De ERE AA 4 5
48. Power sensor Agilent 8481A e Pulse generator Wavetek 801 e Oscilloscope Tektronix 2445 INHIBIT IN 585C 588C COUNTER BAND 1 hee POWER METER E oe SYNTHESIZED SWEEPER PULSE GENERATOR POWER SENSOR Bue ee ee as OSCILLOSCOPE 0 0 O o OUTPUT o O O O O O te kg O 50 OHM e o TERMINATION Figure 6 3 Band 1 Range and Sensitivity Test Setup PROCEDURE 1 Connect equipment as shown in Figure 6 3 2 Set the 585C 588C counter to Band 1 and select resolution 3 3 Set the synthesized sweeper to 250 MHz 4 5 Apply the 250 MHz signal to the counter verify proper reading and record the frequency Using the power meter set the output signal level from the synthesized sweeper to 20 dBm reading 6 4 6 OPERATIONAL VERIFICATION TESTS 6 Repeat steps 3 4 and 5 at 300 MHz 400 MHz 500 MHz 600 MHz 700 MHz 800 MHz 900 MHz and 1 GHz 7 Using the oscilloscope set up the pulse generator to output a 50 ns wide TTL high signal with a 1 MHz pulse repetition rate Apply the signal to the INHIBIT IN connector to simulate a pulsed signal 8 Repeat steps 3 4 5 and 6 for the simulated pulsed signal and record the results BAND 2 RANGE AND SENSITIVITY TEST DESCRIPTION This test verifies counter operation from 1 to 20 GHz 26 5 GHz for the 588C counter The first part of the test verifies opera
49. S where RES is the counter resolution in Hz Since the averaging error is random in nature it can also be reduced by increasing the number of individual gates This can be accomplished by increasing the resolution of the counter and or averaging a number of individual measurements The counter allows 1 Hz maximum resolution and can automatically average up to 99 individual measurements internally With the GPIB and a controller the user can average a larger number of individual measurements which virtually eliminate averaging error The following formulas can be used to 3 36 3 OPERATION determine the averaging error RMS when averaging a number of individual measurements B Is 1 and3 averaging error RMS 2 TOW AVG NAVE Where RES is the specified instrument resolution in Hz up to 1 MHz Above 1 MHz RES is always 1 MHz GW is the logical AND of the pulse width and the inhibit signal minus 30 ns AVG is the number of individual measurements to be averaged REDUCING GATE ERROR Gate error at any given frequency and pulse width can also be virtually eliminated by comparing a CW frequency measurement to a simulated pulsed frequency measurement and computing a correction factor due to gate error This correction factor can then be added to or subtracted from the indicated pulsed measurement to obtain the corrected frequency The CW signal should be the same frequency within 25 MHz as that of the actual pulsed signal to
50. SHOT SPC INDICATOR OFF 3 46 3 OPERATION SPECIAL FUNCTION 20 Display Band 2 Detected RF Level This function verifies coarse calibration of the Band 2 YIG DAC offset and YIG DAC slope adjustments When this function is activated the counter waits for the user to enter the new YIG calibration frequency The previously entered frequency number and Fr are displayed in the frequency section and the pulse parameter section of the display respectively The special function stops in this state until the user enters a new frequency value or if the previously entered frequency value is the required frequency pushing the kHz key allows the special function to continue After the number has been entered the YIG DAC is set to the entered frequency number The display shows CAL DAC plus a number from 0 to 29 that corresponds to the information on the Band 2 power discrimination circuitry The counter outputs the power discrimination circuitry information when requested by the GPIB to OUtput LEvel STOP RESET SPC INDICATOR ON SPECIAL FUNCTION 40 Sweep YIG DAC When this function is activated the counter waits for the user to enter the start frequency of the YIG sweep The previously entered start frequency and F1 are displayed in the frequency section and the pulse parameter section of the display respectively The special function stops in this state until the user enters a new start frequency or if the prev
51. T aes 0 05 Acquisition Time AQ cnr 0 05 Gate Error in Hz GE E Distortion Error in Hz DE ere PW 3 x108 Averaging Error in Hz E RES AE 2 X I Gwy ave Total Error Pulse TEp AE GE DE Time Base Error Total Error CW TEcw Time Base Error 1 count Based on averaging 10 measurements 1 3 Phase Matrix Inc 585C amp 588C SPECIFICATIONS Continued BAND 2 Frequency Range Sensitivity Connector Impedance Maximum Input Damage Level Amplitude Discrimination Frequency Limits Center Frequency FM Tolerance up to 10 MHz rate Acquisition Time Pulse Acquisition Time CW Measurement Time Pulse Measurement Time CW Gate Error in Hz Distortion Error in Hz Averaging Error in Hz Total Error Pulse Total Error CW 0 95 to 20 GHz 585C 0 95 to 26 5 GHz 588C 20 dBm 0 95 to 2 GHz 25 dBm 2 to 12 4 GHz 20 dBm 12 4 to 20 GHz 15 dBm 20 to 26 5 GHz 588C Only Precision Type N 585C APC 3 5 588C 50 Q nominal 7 dBm 45 dBm CW 53 dBm peak 1 usec pulse width 0 1 duty cycle 15 dB gt 50 MHz separation If lt 15 dB unit counts one signal accurately if signals are gt 200 MHz apart Instrument rejects signals gt 50 MHz outside of limits Frequency limit can be set to a resolution of 10 MHz Instrument rejects signals gt 50 MHz outside the specified A frequency Center Frequency an
52. TOP RESET SPC INDICATOR ON SPECIAL FUNCTION 03 Scan Display Segments Test Each segment in all the digits and banks of annunciators is turned on sequentially by this function to test the display segment drivers The scan rate is determined by the setting of the SAMPLE RATE control STOP RESET SPC INDICATOR N A SPECIAL FUNCTION 04 Scan Display Digits Test Each digit and each bank of annunciators is turned on sequentially by this function to check the display digit driver The scan rate is determined by the setting of the SAMPLE RATE control STOP RESET SPC INDICATOR N A SPECIAL FUNCTION 05 Keyboard Test This function verifies the operation of the keyboard After this function is activated the counter stops normal operations and the display shows the key code of the last key pressed When a new key is pressed the display is updated to show the code of the new key When the GPIB controller requests a key code the code of the last key pressed is output If the controller requests a key code the counter outputs to the GPIB interface the code of the last key pressed even if Special Function 05 is not activated If the counter is in LOCAL this function must be terminated by the CLEAR DISPLAY key If it is in remote this function can be terminated by any device dependent command STOP RESET SPC INDICATOR ON 3 44 Table 3 5 Keyboard Scan Codes 3 OPERATION SCAN CODE SCAN CODE KEY SCAN
53. WARE KIT RACK MOUNT METRIC 5000262 00 4 4 4 ACCESSORIES SERVICE KIT ADJUSTMENT AND TROUBLESHOOTING TOOL KIT M585C ACC043 This service kit provides a set of tools for adjustments and troubleshooting The tools are supplied in a molded case O a Figure 4 4 Service Kit M585C ACC043 SERVICE KIT M585C ACC043 2011125 02 585C PARTS LIST 2011125 02 588C Reference Phase Matrix Designator Description Part Number 1 PCB ASSY EXTENDER 2020514 01 2 CABLE ASSY BNC TO SMB 2040222 01 3 CONN BNC E Z HOOK TEST 2610054 00 4 CABLE ASSY BNC TO MCX 2041079 01 5 CABLE ASSY BNC TO STRAIGHT MCX 2041081 01 6 TOOL INSULATED TUNING 5730006 00 7 TOOL MINIGRABBER TEST KIT 5730007 00 8 CASE ASSY TOOL BOX 2010852 02 4 5 Phase Matrix Inc 585C amp 588C SERVICE KIT M585C ACC043 2011125 02 585C PARTS LIST continued 2011125 02 588C Reference Phase Matrix Designator Description Part Number 9 LABEL SERVICE KIT 043 5560995 01 10 CARD SERVICE KIT CONTENTS 043 5560995 01 11 DRAWING SERVICE KIT 8100393 02 4 6 4 ACCESSORIES CHASSIS SLIDE KIT INCLUDES RACK MOUNT KIT WITH HANDLES M585C ACC101 This chassis slide kit provides all the parts and hardware required to rack mount the instrument on slides for easier access The rack mount brackets have built in handles Figure 4 5 shows one rack mount one slide and the mounting hardware provided in the kit Two rack mounts two slides and m
54. When the HOLD command is off data is read out to the bus in the normal way The display is automatically updated at the specified sample rate and the counter outputs successive measurement readings without requiring a RESET command or device trigger each time 5 16 OPERATIONAL VERIFICATION TESTS INTRODUCTION This section contains information for verifying proper operation of the counter Although these tests are not comprehensive they do ensure to a high degree of confidence that the instrument is operating properly The tests can be useful for incoming inspection and should be performed after any servicing to ensure proper operation of the counter All tests can be performed without removing the instrument covers A test report form is included at the end of this section that can be used to provide a test record If the application is especially critical in nature more extensive testing may be required and is covered in the performance verification test section of the service manual Because of the high cost and specialized nature of frequency sources above 40 GHz testing above this frequency is not covered Also for the purpose of operational verification tests simulated pulsed signals are used in Bands 1 and 3 EQUIPMENT REQUIREMENTS Equipment required for the operational verification tests on the Phase Matrix 585C or 588C counter is listed in Table 6 1 The critical parameters are the minimum use specifications required for the perf
55. a all stored information is retained The counter operates in the same state as it was in before the change The only exception is when the counter is performing a special function the special function is terminated e Implementation of local lockout with the INIT LOCAL key disabled accordingly When the counter is in remote and local lockout is not active the INIT LOCAL key on the front panel acts as the return to local key e Availability of counter configuration information in addition to the status events available in the status byte by means of a special OUTPUT CONFIGURATION command When the counter is configured as a talker it outputs five bytes that contain the current configuration e Recognition of all three bus terminators CR LF carriage return line feed NL null and EOI end or identify e Availability of front panel annunciators for remote RMT talker TLK listener LSN and service request SRQ that continuously show the interface state e Implementation of talk only modes for no controller applications 5 2 5 PROGRAMMING DEVICE DEPENDENT MESSAGES LISTENER FEATURES A device dependent message generally consists of reserved words and numbers The message structure depends on the type of message and can be e Header only e Header and argument e Header and argument and terminator Where the header is a reserved word the argument is a number or a reserved word and the terminator is a reserved wor
56. able Pulse Profile This function turns off automatic pulse profiling reversing the action of Special Function 77 ONE SHOT SPC INDICATOR OFF 3 55 Phase Matrix Inc 585C amp 588C SPECIAL FUNCTION 79 Connect Band 0 Low Pass Filter This function connects a low pass filter to the Band 0 input The 3 dB point on the filter is at approximately 30 kHz which means the attenuation of signals above 30 kHz increases as a function of frequency When measuring signals below 50 kHz if the count seems unstable enabling the low pass filter may stabilize the count by attenuating the higher frequency components of the input signal ONE SHOT SPC INDICATOR ON SPECIAL FUNCTION 80 Disconnect Band 0 Low Pass Filter This function disconnects the Band 0 Low Pass Filter reversing the action of Special Function 79 The Band 0 Low Pass Filter is by default disconnected ONE SHOT SPC INDICATOR OFF SPECIAL FUNCTION 81 Measurement Averaging This function allows multiple measurements to be mathematically averaged Use this function to select the number of averages in the range of 01 to 99 Entering 01 or CLEAR DATA clears the averaging function back to the default value of 1 When measuring pulsed signals one of the sources of error is averaging error Special Function 81 is used to average measurements which reduces averaging error Refer to the measurement accuracy section of the manual for more information on a
57. aken 10 MHz IN OUT provides a 10 MHz square wave output at 1 V p p AC coupled into 50 Q when the counter s internal timebase is enabled Accepts a 10 MHz 1 V p p signal into 1000 Q for external timebase operation Special Functions 08 and 09 are used to select either the external or internal timebase INHIBIT IN used to delay frequency measurements TTL level input is used to control when the counter can perform a measurement A TTL high on this input allows counter to search center and perform measurements on incoming signals A TTL low on this input prevents the counter from detecting an incoming signal inhibiting signal measurements GPIB connects the instrument to the IEEE 488 1978 bus AC Power Connector accepts the power cord supplied with the counter DELAYING PULSE GENERATOR OPTIONAL TRIGGER IN TTL input signal for triggering the internal delaying pulse generator Input impedance is approximately 1 kQ Trigger polarity is selectable using Special Functions 12 and 13 TRIGGER OUT TTL output signal 50 to 100 ns in duration with a low to high transition occurring at delay time equal to zero This output is capable of driving 50 Q PULSE OUT TTL output pulse from the internal delaying pulse generator This output is capable of driving 50 Q 3 5 Phase Matrix Inc 585C amp 588C INSTRUMENT DEFAULT SETTINGS When the counter is initially turned on the state of the counter is determine
58. an error condition the counter would generate an SRQ whenever either an error condition exists or a valid measurement is available The following items should be included in any program using the SRQ feature 1 Tell the counter when to generate an SRQ That is tell the counter which events should generate an SRQ This is done using the SRQMASK command 2 Tell the controller to monitor the SRQ line on the GPIB The SRQ is a maskable interrupt and the controller needs to know if it should respond to the interrupt Tell the controller what to do when it receives an SRQ interrupt 4 Serial poll the counter after an SRQ is generated to clear the interrupt When the counter generates an SRQ it sets bit 6 in the status byte Serial polling the instrument clears the SRQ bit and allows the instrument to generate a new SRQ upon the next occurrence of the conditions specified in the SRQ Mask 5 It may also be necessary to clear the SRQ register in the controller Consult your manual on the controller for more information on clearing the SRQ register in the controller 5 13 Phase Matrix Inc 585C amp 588C DEFAULT STATE DEVICE CLEAR FEATURES The default state of the instrument occurs after power on hardware initialization or a device clear command The default state can be customized using Special Function 72 For additional information on this feature see Section 3 Table 5 8 lists the factory set default state values of the
59. anel PULSE PERIOD key SCIENTIFIC ON or OFF Selects exponential notation for talker SEPARATE ON or OFF Replaces the commas with CR LF between multinumber results WIDTH ON or OFF NOTE Turns pulse width measurement on or off Equivalent to front panel PULSE WIDTH key In the local mode SAMPLE RATE and HOLD are controlled via the front panel control but in remote the front panel control has no effect In the remote mode both SAMPLE RATE and HOLD are under software control Refer to GPIB SAMPLE RATE and HOLD commands 5 4 Table 5 4 Parameter Messages Header AVERAGE Argument lt number gt Terminator None 5 PROGRAMMING Description Inputs an averaging value 01 to 99 BAND lt number gt None Selects a specific band 0 to 3 or DEFAULT CENTERFREQ lt number gt Hz kHz MHz GHz Sets a center frequency value and mode DELTAF lt number gt Hz kHz MHz GHz Sets the AF value Equivalent to front panel AF key FETCH lt number gt None Recalls counter setup stored in specified storage register 0 to 9 Special Function 73 HIGHLIMIT lt number gt Hz kHz MHz GHz Sets a frequency limit high value LOWLIMIT lt number gt Hz kHz MHz GHz Sets a frequency limit low value MEMORY MEMORY lt hex_adrs gt Increment lt hex_data gt lt hex_data gt Accesses a memory locat
60. arity Impedance Connector Trigger Output Level Pulse Width Connector Pulse Width Minimum Maximum Resolution Pulse Delay Y Minimum Maximum Resolution Pulse Period Minimum Maximum Resolution TTL O into 50 Q BNC TTL O Positive or Negative see special functions 12 and 13 1kQ BNC TTL into 50 Q 50 to 100 ns BNC 24 ns 800 ms 2ns 74 ns 800 ms 2ns 100 ns 800 ms 50 ns 1 7 Phase Matrix Inc 585C amp 588C SPECIFICATIONS Continued REMOTE SENSORS Remote Frequency Waveguide Waveguide Power Damage Sensor Range GHz Size Flange Range dBm Level dBm 26 5 40 WR 28 UG 599 U 20 to 5 10 40 60 WR 19 UG 383 U 20 to 5 10 60 90 WR 12 UG 387 U 15 to 5 10 90 110 WR 10 UG 387 U 15 to 5 10 50 75 WR 15 UG 385 U 20 15 to 5 10 33 50 WR 22 UG 383 U 20 to 5 10 26 5 50 2 92 mm coax Coaxial 20 to 5 10 K Connector 98 3 8 110 170 WR 6 UG 387 U 15 to 5 10 K Connector is a registered trademark of the Wiltron Company OPTIONS AND ACCESSORIES OPTION DESCRIPTION 5803 Rear Panel Input Connectors 5804 Band 3 Frequency Extension Module Available on Model 588C only Required for frequencies between 26 5 GHz and 170 GHz Frequency Extension Cable Kit 890 and appropriate remote sensors are also required 5809 Ovenized High Stability Time Base Aging Rate lt 5 x 101 day 5810 Delaying Pulse Generator A
61. ays of the measuring instrument can be significant In the Phase Matrix 585C and 588C counters the total delay between the time a signal is applied to an input connector and the time it is available to be counted is nominally 60 ns The signal threshold output on the rear panel typically occurs 20 ns after the signal is applied The gate signal at the rear panel occurs at the measurement time with virtually no delay In other words when absolute time positioning of a signal is required it is necessary to consider that the gate signal representing the measurement period is actually making a measurement of the signal which appeared at the input connector 60 ns earlier If the signal threshold output is used as an indication of input signal then it occurs 40 ns prior to measurement Figure 3 20 page 3 32 shows the relative timing of these signals for a pulsed input signal Timing however is not a function of input signal characteristics 3 31 Phase Matrix Inc 585C amp 588C e NN tpw gt Le tpw gt gt 20 ns lt 60 ns ola tpw gt DELAYED A IF PULSE gt 5 to 10 ns tow 30 ns gt SIGNAL THRESHOLD GATE Figure 3 20 Internal Timing Delays ACCURACY When making any type of measurement some degree of measurement error exists In Phase Matrix s CW type frequency counters as with most other CW counters these errors are limited to a co
62. ble from Phase Matrix for the 585C and 588C counters are described in Section 4 FRONT PANEL CONTROLS INDICATORS AND CONNECTORS TERE Eae MODEL 588C PULSE CW MICROWAVE FREQUENCY COUNTER y j PULSE GENERATOR ON SAMPLE RATE WIDTH DELAY PERIOD cate INIT O O search LOCAL STBY HOLD DISPLAY CLEAR DELAY TEST DATA DISPLAY Figure 3 1 Front Panel Controls and Indicators e POWER switch selects ON or STBY In the standby position power is applied to the oven oscillator if installed and to the primary side of the power transformer 3 1 Phase Matrix Inc 585C amp 588C WARNING Whenever AC power is connected to this instrument the power supply is energized Therefore exercise caution whenever the covers are removed e SAMPLE RATE HOLD control varies time between measurements from 0 1 to 10 seconds nominal The last reading is retained indefinitely in HOLD e GATE indicator lights when the signal gate is open and a measurement is being made e SEARCH indicator lights when the counter is not locked to an input signal e Data display 12 digit numeric display provides direct read out of measurement data Frequency data is displayed in a fixed position format that is sectionalized in GHz MHz kHz and Hz When active pulse parameter data pulse width and pulse period is displayed in the three least significant digits of the freque
63. cial functions does not alter any previously entered parameters unless specifically stated To terminate all previously activated special functions press the SPECIAL key and then the 0 key followed by the 0 key again or press the SPECIAL key followed by the CLEAR DATA key To terminate all special functions using GPIB issue the command SPECIAL 00 SPECIAL FUNCTION 01 200 MHz Self Test This function verifies that the count chain gate generator and VCO are operational NOTE The front panel TEST button provides a convenient shortcut for accessing Special Function 01 When this function is entered the counter 1 Exits the current band 2 Sets the hardware to the self test mode 3 Sets the VCO to 400 MHz The measurement is the VCO divided by 2 4 Sets the counter to take frequency measurements only 5 Starts measurement cycles The display shows the frequency measurement results These results are output to the GPIB interface when frequency readings are requested The measurement result should be 200 MHz 1 count STOP RESET SPC INDICATOR ON 3 43 Phase Matrix Inc 585C amp 588C SPECIAL FUNCTION 02 Light Display Segments Test This function verifies that all the digit segments and annunciator LEDs are operational When this function is activated all digit segments and all annunciators are turned on The GATE and the SEARCH annunciators are both on for the duration of the special function S
64. cimal digit B e kHz key hexadecimal digit C e Hz key hexadecimal digit D e key hexadecimal digit E e key hexadecimal digit F e DISPLAY DELAY key INCREMENT command e TEST key DECREMENT command e CLEAR DATA key ADDRESS command allows the user to enter another address e CLEAR DISPLAY key remains the same it exits the special function After activating Special Function 46 the user can do one of the following e Exit the function by issuing a CLEAR DISPLAY command pressing the CLEAR DISPLAY key e Alter the content of the memory location by entering a two digit hexadecimal number e Display the next memory location by issuing an INCREMENT command pressing the DISPLAY DELAY key e Display the previous memory location by issuing a DECREMENT command pressing the DISPLAY TEST key Enter another memory address by first issuing an ADDRESS command pressing the CLEAR DATA key If the content of a memory location is altered the new content of that memory location is displayed in the pulse parameter section of the display If the ADDRESS command is issued the display changes to show Addr_ _ _ _ While the address is being entered the hexadecimal digits keyed in replace each blank sequentially After the memory address is entered the content of that memory location is displayed in the pulse parameter section of the display This function must be terminated by the CLEAR DISPLAY command In the remote mod
65. ctivating Special Function 01 For a full description of Special Function 01 see ACTIVATION OF SPECIAL FUNCTIONS on page 3 43 3 11 Phase Matrix Inc 585C 588C SPECIAL FUNC This key is used to call any of the various special functions listed in the SPECIAL FUNCTION DIRECTORY on page 3 41 KEYBOARD EXAMPLES SPECIAL CLEAR Press C 0 to clear all activated special functions FUNC DATA SPECIAL Press 0 C to activate Special Function 01 200 MHz self test FUNC SPECIAL Press C G to activate Special Function 04 scan digits test FUNC GPIB EXAMPLE Enter Send 0 18 SPECIAL 01 NLend to activate Special Function 01 200 MHz self test PARAMETER CALL KEYS USED WITH TERMINATOR CENTER FREQ This key controls the center of the frequency range in which the counter searches for a signal The AF key controls the search range This function is used to reduce the acquisition time or to search for a particular signal in a multiple signal environment This function is only available in bands 2 and 3 Select Band 2 CENTER FREQ in the range of 1 GHz to 20 GHz for Model 585C and in the range of 1 GHz to 26 5 GHz for Model 588C The counter searches and locks onto signals within AF from the entered value Depending on input signal power and frequency the counter can lock on signals outside the AF frequency range The actual locking range is determined by the entered AF frequency input signal le
66. d Messages can be concatenated with a comma or semicolon as separators A message chain can be terminated with CR LF or NL or EOI NOTE Any device reserved word is recognized by at least the two first characters with the exception of RESEt which requires the first four letters to be entered and DELta which requires the first three letters to be entered These first two characters are printed in large boldface type in the following command lists and in program examples to promote user familiarity with the shortened form of the command Spelling of more characters up to the full word is optional for user program readability Example INITIALIZE INITIAL INIT and IN are all recognized equivalently A lt number gt can be sent in any of the defined IEEE formats NR1 NR2 NR3 Example 12000 12000 00 001 2e4 and 12000E 5 are all recognized equivalently The reserved word DEFAULT can replace a numeric argument for default value assignment The terminator in the parameter messages group is optional and defaults to Hz or seconds A command message having more than one word e g PERIOD ON should have a space between words However this is optional if the second word is a number OFFSET4 3e9 and OFFSET 4 3E9 are recognized equivalently Additional spaces in front of words between words or after a message are optional and are ignored Nulls and CRs are ignored anywhere Both upper case and lower case characters are equa
67. d A Frequency can be set to a resolution of 10 MHz 20 MHz p p 8 5 F 12 4x108 60 2x10 PP AQ 2 FH 4x10 SiNpRE MINPRE Gw 03 8 z 12 4x10 60 AQ 2 FH 4x 10 MINERE MPA 03 PP MT as 08 MT 553 0 05 _ 0 01 GE GW pe 008 __ PW 3x 10 _ RES rs GW AVG TEp AE GE DE Time Base Error TEcw Time Base Error 1 count Based on averaging 10 measurements 1 4 1 GENERAL INFORMATION SPECIFICATIONS Continued BAND 3 OPTION 5804 Frequency Range Sensitivity Connector Maximum Input Damage Level Amplitude Discrimination 26 5 to 170 GHz see page 1 8 20 dBm 26 5 to 60 GHz 15 dBm 60 to 170 GHz Varies with remote sensor see page 1 8 5 dBm 10 dBm 20 dB FM Tolerance up to 10 MHz rate Automatic 20 MHz p p Center Freq 150 MHz p p RES AE 2x __ Averaging Error in Hz x GW AVG _ 0 03 Gate Error in Hz GE W Distortion Error in Hz DE E _ PW 3x 10 Total Error Pulse TEp AE GE DE Time Base Error Total Error CW TEow Time Base Error N counts where N tea 2x10 Acquisition Time Pulse 3 _ 70 6 x 10 PP 2 Automatic AQ MINPRE GW 0 4 70 8x10 PP 2 Center Freq AQ MINPRES ON 0 are A o 70 Acquisition Time CW AQ MINPRE 0 2 i APP Measurement Time Pulse MT GW RES 0 05 Measurement Time CW Center Frequency
68. d by a set of default values which are stored in memory The factory set default values for all instrument settings are listed in Table 3 1 Table 3 1 Instrument Default Settings Parameter Band Default Value 2 microwave band Subband Resolution J 3 1 kHz Special Function 00 all cleared Average 01 Frequency Multiplier 01 Frequency Offset 0 kHz Minimum PRF 2 kHz Frequency Limit Low 900 MHz Frequency Limit High Center Frequency 20 5 GHz Model 585C 26 7 GHz Model 588C O kHz not active AF 50 MHz Frequency Display On Pulse Width Measurements Pulse Period Measurements Off Pulse Generator Optional Width Delay 10 us O not active Models 585C and 588C both offer a feature that enables the user to customize the state of the instrument at turn on For more information on this feature see Special Functions 72 and 73 3 6 3 OPERATION KEYBOARD OPERATION The keyboard consists of 25 push button keys that control the major functions of the counter see Figure 3 5 RES gt j FUNC PULSE CENTER DF WIDTH FREQ PULSE GENERATOR PULSE FREQLIMIT WIDTH MODE DELAY PERIOD PERIOD LOW HIGH INIT DISPLAY CLEAR RESET TRIG MIN LOCAL DELAY TEST DATA DISPLAY PRF J Figure 3 5 Keyboard NUMERIC ENTRY KEYS Twel
69. d closed many times in order to accumulate enough gate time to provide the required resolution Each time the gate opens and closes there is a small but finite error The total error is proportional to the number of times the gate is cycled during a measurement and is inversely proportional to the gate width This error is also related to both temperature and input frequency In the 585C and 588C counters the worst case gate error including all variables is specified as 0 07 Band 1 gate error GW 0 01 k Band 2 gate error GW 0 03 a Band 3 gate error GW 3 35 Phase Matrix Inc 585C amp 588C Where GW in seconds is the logical AND of the pulse width and the inhibit signal minus 30 ns see Figure 3 21 Unlike averaging error which is random gate error is systematic and is not reduced by averaging DISTORTION ERROR During the first and last few nanoseconds of a pulse phase distortion caused by impedance mismatches or video effects can occur resulting in shifts in time of the zero crossing On wide pulses distortion error is insignificant however on narrow pulses it may become a dominant source of error To reduce the effect of distortion error on count accuracy the 585C and 588C counters automatically adjust the gate to start 15 ns after the pulse begins and to end 15 ns before the end of the pulse The specified maximum distortion error for all three bands can b
70. e a memory content can be interrogated by using the OUTPUT MEMORY command When the counter is addressed to talk the last memory address accessed is output A memory location can be accessed using the MEMORY OHHHH command where H is a hexadecimal digit The content of a memory location can be altered using the MEMORY OHHHH 3 50 3 OPERATION OHH command In the remote mode Special Function 46 need not be activated when accessing and altering memory locations Those operations can be done by the controller in the background STOP RESET SPC INDICATOR ON SPECIAL FUNCTION 47 Measure IF Only This function provides the user with the means to measure the frequency of the IF signal present at the input of the count chain assembly without having the counter converter locked on the signal The counter does not measure pulse parameters when this function is activated When Special Function 47 is activated the counter stops the normal converter lock and measurement cycles The VCO YIG and all microprocessor controlled hardware switches are left at the state they were in when the function was activated The counter then starts measuring the frequency of the IF signal present at the input to the count chain assembly The measurement results are displayed on the front panel and are also output via the GPIB interface if frequency readings are requested NOTE This function does not check periodically for the presence of a signal as in th
71. e able to automatically measure the frequency of repetitive pulsed signals as well as CW signals Pulse widths from 50 nanoseconds to 1 second and pulse periods from 250 nanoseconds to 1 second are measured to a resolution of 10 ns Using an inhibit input the instruments can profile pulsed or chirped CW signals using gates as narrow as 15 ns No manual switching is required to select CW or pulse signal measurement The frequency range of the 585C is 100 Hz to 20 GHz The frequency range of the 588C is 100 Hz to 26 5 GHz and can be extended by option up to 170 GHz Microprocessor control and the unique architecture permit not only the major counter functions such as frequency offsets frequency range limits and averaging capabilities but also a variety of special functions such as internal diagnostics calibration and test aids and sophisticated operational enhancements All primary and background functions are fully programmable FUNCTIONAL DESCRIPTION In the following description the Phase Matrix 585C 588C is divided into two major portions the Basic Counter and the RF Converter The RF Converter is further divided into the RF Band 0 Converter the RF Band 1 Converter and the RF Band 2 Microwave Converter Theory of operation for the Band 3 mm wave converter is provided in the OPTIONS section 3 17 Phase Matrix Inc 585C amp 588C BASIC COUNTER The Basic Counter shown in Figure 3 6 receives input signals from all four band
72. e and a high and low frequency limit and instructs it to output pulse width to the counter display and pulse width and frequency to the controller display The controller display would appear something like this 0 0000132580 12500000000 OUTPUT MESSAGES TALKER FEATURES After receiving a talk address the GPIB outputs the current configuration or any parameter value or measurement result in response to the appropriate output control message After power on or device clear the controller outputs the displayed measurement results as it does after the OUTPUT DEFAULT command The controller can be instructed to output any ordered combination of the three measurements no matter what is displayed on the front panel Example OUTPUT FREQ AND WIDTH OUTPUT PERIOD OUTPUT WIDTH AND FREQUENCY AND PERIOD The format of each output message can be controlled using the following e SCIENTIFIC provides exponential notation with engineering exponents when SCIENTIFIC is ON Default is OFE e DYNAMIC suppresses blanks and trailing zeros for faster data transfers when DYNAMIC is ON Default is OFE e HEADER provides an alpha header and terminator around each numeric data item for clarity useful for printers when HEADER is ON Default is OFE NOTE Terminator takes over the exponential role if both SCIENTIFIC and HEADER are ON e SEPARATE Substitutes CR LF for the comma between results of one measurement freq period when SEPARATE is
73. e calculated from the following formula 0 03 PW 30 ns Where PW pulse width minimum pulse width is 50 ns Maximum Distortion Error TECHNIQUES FOR IMPROVING ACCURACY In most cases the specified counter accuracy is more than sufficient to meet measurement requirements If greater accuracy is required all four sources of error can be minimized by a combination of calibration long term averaging added correction factors and signal conditioning TIMEBASE CALIBRATION A frequency error in the internal timebase oscillator results in a proportional error in the frequency reading for either CW or pulsed signals The aging rate of the standard internal timebase is specified to be less than 1 x 10 parts per month This means that if the oscillator were set precisely on frequency at the beginning of the month it could be 1 Hz off frequency at the end of the month On a frequency measurement of 18 GHz a 1 Hz error in the 10 MHz timebase would cause a measurement error of 1 8 kHz Other errors can result from changes in ambient temperature Measurement errors caused by the timebase can be reduced by adjusting the timebase at the temperature it is used using a standard of known accuracy Another error reduction method is to use an external 10 MHz timebase with a known degree of accuracy such as a 10 MHz frequency standard REDUCING AVERAGING ERROR Averaging error is reduced to 1 count whenever the gate width GW is greater than RE
74. e generator in the 585C 588C counter this signal can be profiled either manually or automatically When profiling a pulsed signal the change in frequency across the measurement window must be less than 20 MHz to ensure that the signal passes through the input YIG filter The signal shown in Figure 3 17 is changing frequency at a rate of 2 MHz per us so the maximum width of the measurement window should be less than 10 us Pulse Period gt 200 us oF Pulse Ft 7 100 us gt Figure 3 17 Frequency Profiling To profile the signal shown in Figure 3 17 manually perform the following steps Set MINPRF to default 2 kHz using the MINPRF key Connect your trigger source to the trigger input on the rear panel 1 2 3 Set the measurement window to 5 us using the Pulse Generator Width key 4 Set the delay to the minimum delay of 75 ns using the Pulse Generator Delay key 5 Setup the pulse generator to trigger from external trigger input by pressing the Pulse Generator Mode key and entering 1 6 To minimize signal acquisition time set frequency limit low at 4 5 GHz and frequency limit high at 5 5 GHz The counter automatically finds the signal and displays the average frequency over the 5 us measurement window beginning 75 ns after the rising edge of the pulse The frequency can be measured anywhere along the pulse by changing the delay time of the pulse generator To profile the signal shown in Figure
75. e measured by detecting the signal and counting the number of zero crossings of the phase locked VCO signal prescaled by 4 that occur while the signal is present The microprocessor then calculates the pulse width by multiplying the number of zero crossings by the period of the VCO signal Pulse period measurements are made using a similar technique except that the counter counts zero crossings during the time from the rising edge of one pulse to the rising edge of the next pulse RF CONVERTER Band 0 RF Converter CW Only Figure 3 7 is a block diagram of the Band 0 RF converter BAND 0 INPUT AMPLIFIER BAND BASIC CW ONLY AMPLIFIER 100 Hz to 250 MHz LIMITER SELECT COUNTER Figure 3 7 Band 0 RF Converter Block Diagram Signals between 100 Hz and 250 MHz are counted directly The gate width is set according to a specified resolution from resolution O to resolution 6 Band 1 RF Converter Figure 3 8 is a block diagram of the Band 1 RF converter BAND 1 INPUT FILTER BAND DIVIDE i AMP AMP gt 250 MHz to 1 GHz ATTEN VARIABLE SELECT BY 4 a ATTEN ATTEN gt A CONTROL THRESHOLD BASIC LOGIC DETECTOR COUNTER A MICROPROCESSOR Figure 3 8 Band 1 RF Converter Block Diagram Signals between 250 MHz and 1 GHz are prescaled by four before reaching the basic counter
76. e normal operation of the counter STOP RESET SPC INDICATOR ON SPECIAL FUNCTION 61 Disable Input Signal Tracking This function configures the counter to skip the execution of the input signal tracking function that normally occurs after every measurement cycle This function shortens the measurement cycle time but prohibits the counter from tracking a moving signal The action taken with this function can be reversed by activating Special Function 62 ONE SHOT SPC INDICATOR ON SPECIAL FUNCTION 62 Enable Input Signal Tracking This function reverses the action taken with Special Function 61 ONE SHOT SPC INDICATOR OFF 3 51 Phase Matrix Inc 585C amp 588C SPECIAL FUNCTION 63 Disable Sample Rate Control This function configures the counter to ignore the local and the remote sample rate controls The counter measurement cycle rate is maximized which shortens the measurement cycle time The action taken with this function can be reversed by activating Special Function 64 ONE SHOT SPC INDICATOR ON SPECIAL FUNCTION 64 Enable Sample Rate Control This function reverses the action taken with Special Function 63 ONE SHOT SPC INDICATOR OFF SPECIAL FUNCTION 65 Disable Results Display This function prevents the display of measurement results on the front panel When Special Function 65 is activated the front panel displays only a row of dots When the user enters parameters thro
77. e the instrument to temperatures below 55 C or above 75 C nor to altitudes above 40 000 ft 12 000 m SPECIFICATIONS GENERAL Size 3 5 in H x 16 75 in W x 14 in D 8 9 cm H x 42 6 cm W x 35 6 cm D Weight 24 lb 11 kg with no options Shipping Weight 33 Ib 15 kg with no options Operating Temperature 32 to 122 F 0 to 50 C Humidity 0 to 95 non condensing 75 for gt 25 C 45 for gt 40 C Power 100 120 220 240 V AC 10 50 400 Hz 100 VA typical Pulsed Measurements Minimum Pulse Width 50 ns Maximum Pulse Width CW Minimum Profile Sample 15 ns Minimum PRF 1 Hz Maximum PRF 4 MHz Minimum Off Time 200 ns does count CW Minimum On off Ratio 15 dB Resolution 1 Hz to 1 GHz Gate Time 4 sto 1 us dependent upon band and resolution 1 2 1 GENERAL INFORMATION SPECIFICATIONS Continued BAND 0 CW ONLY Sensitivity Connector Impedance Maximum Input Damage Level FM Tolerance Measurement Time Total Error 20 dBm BNC 50 nominal 7 dBm 27 dBm Carrier frequency must remain within band MT 1 0 05 RES TE timebase error 1 count BAND 1 Frequency Range 250 MHz to 1 GHz Sensitivity 20 dBm Connector BNC Impedance 50 Q nominal Maximum Input 7 dBm Damage Level 27 dBm Amplitude Discrimination 15 dB FM Tolerance up to 10 MHz rate Carrier frequency must remain within band Measurement Time Pulse MT ESS 0 05 Measurement Time CW M
78. e with the Hz terminator key If the signal at this point is applied to the Band 2 input connector and Band 2 is selected the counter would automatically find the signal and display the frequency on the front panel 3 23 Phase Matrix Inc 585C amp 588C Pulse Period gt t 2 ms Pue gt 1 gt Figure 3 12 Pulsed Signal These counters can also automatically measure both the pulse width and the pulse period of the incoming signal to a resolution of 10 ns This is accomplished by pressing either the PULSE WIDTH key to measure the pulse width or the PULSE PERIOD key to measure the pulse period MULTIPLE SIGNAL MEASUREMENTS In actual microwave environments there are often multiple signals present In a multi signal environment the counter automatically finds and measures the largest signal as specified by amplitude discrimination In Band 2 the counter can also measure signals other than the largest signal present This is accomplished by setting frequency limits around the desired signal Figure 3 13 page 3 25 shows an example of the frequency limits feature 3 24 3 OPERATION INPUT POWER dBm 20 FREQUENCY FREQUENCY LIMIT LOW LIMIT HIGH 10 10 0 AA JE 5 10 20 20 30 FREQUENCY GHz 5 6 6 3 6 6 7 a DISPLAYED FREQUENCY Figure 3 13 Frequency Limits If the signals shown in Figure 3
79. enerator is active PRE minimum pulse repetition frequency lights when a MINPRF other than the factory default is being used HLD hold lights when measurement updating is disabled SPC special function lights when a special function is enabled EXT external reference lights when the counter is set to an external timebase reference NOTE For proper counter operation when the EXT function is selected a 10 MHz external reference MUST be applied to the rear panel input connector GPIB STATUS INDICATORS e LSN listen lights when the counter is addressed as a listener by the GPIB e TLK talk lights when the counter is addressed as a talker by the GPIB e SRQ service request lights when the counter is sending a service request e RMT remote lights to indicate that the front panel controls are disabled and the counter is being controlled by the GPIB 3 3 Phase Matrix Inc 585C amp 588C SIGNAL INPUT CONNECTORS INPUT POWER BANDO 1 7 dBm Maximum 27 dBm DAMAGE BAND2 7dBm Maximum 45 dBm DAMAGE BAND3 5 dBm Maximum 10 dBm DAMAGE BAND 2 950 MHz 26 5 GHz BAND 3 26 5 GHz 170 GHz REMOTE SENSOR 50 OHM Figure 3 3 Signal Input Connectors Model 588C Shown BAND 0 BNC female has a nominal input impedance of 50 Q and is used for CW measurements in the range of 100 Hz to 250 MHz e BAND 1 BNC female has a nomina
80. er is turned on during this function To activate this function in remote the user instructs the controller to output SPECIAL 41 The start and stop frequencies used are the frequencies specified in the GPIB commands V1FREQ and V2FREQ where VIFREQ and V2FREQ correspond to F1 and F2 respectively If the start or stop frequency required is different from that specified in VIFREQ or V2FREQ the number in that frequency register must be updated before SPECIAL 41 is activated ONE SHOT SPC INDICATOR OFF SPECIAL FUNCTION 42 Sweep VCO with VCO Power Amplifier Off After this function is activated the counter waits for the user to enter the start frequency of the VCO sweep The previously entered start frequency and F1 is displayed in the frequency section and the pulse parameter section of the display respectively The special function stops in this state until the user enters a new start frequency or if the previously entered frequency is the required start frequency the user presses the kHz key to tell the special function to continue After the start frequency is entered the counter waits for the user to enter the stop frequency of the VCO sweep The previously entered stop frequency and F2 is displayed in the frequency section and the pulse parameter section of the display respectively The special function stops in this state until the user enters a new stop frequency or if the previously entered frequency is the required
81. et to 10 kHz then the potential error is 10 kHz On signals having pulse widths less than the required gate time determined by the resolution the counter generates more than one gate per measurement cycle If the counter generates N number of gates then an uncertainty of N counts is possible though very unlikely The resultant averaged measurement follows the rules of statistics in that on successive gates the 1 count error varies randomly In fact most of the 3 34 3 OPERATION readings 63 fall between the square root of N where N is the number of gates required to accumulate the required gate time This is called the RMS averaging error In the following formulas N Lee It should be noted that the total gate time is typically 30 ns narrower than the input pulse The RMS averaging error in Hz can be calculated using the following formulas Bands 1 and 3 averaging error RMS 2 RES RES B 2 RMS and 2 averaging error RMS GW Where RES is the specified instrument resolution in Hz up to 1 MHz Above 1 MHz RES is always 1 MHz GW is the logical AND of the pulse width and the inhibit signal minus 30 ns See Figure 3 21 for a graphic description of the logical AND function A P RF PULSE B i INHIBIT SIGNAL BY ENABLE ON TTL HIGH A AND B GW GATE WIDTH 30 ns Figure 3 21 Logical AND Function GATE ERROR When narrow pulses are counted the gate is opened an
82. external delaying pulse generator or the optional internal delaying pulse generator Figure 3 15 page 3 27 shows a typical setup for profiling frequency changes across a pulsed signal 3 26 3 OPERATION DELAYING PULSE GENERATOR TRIGGER TRIGGER FROM SOURCE _INPUT F e o INHIBIT INPUT o e INPUT SIGNAL AWW External pulse generator is not required if Option 5810 Internal Delaying Pulse Generator is installed Figure 3 15 Pulse Profile Measurement Test Setup The output pulse of the signal generator is used as an enable input to the counter As the pulse delay is varied the measurement window can be walked through the pulse A plot of frequency versus delay gives the frequency versus time profile of the pulse directly as shown in Figure 3 16 The width of the measurement window is determined by the width of the pulse generator output Measurement windows as narrow as 15 ns can be used although wider windows yield higher accuracy INPUT SIGNAL PROFILE MEASUREMENT WINDOW FREQUENCY PROFILE FREQUENCY aaa f AVERAGE TIME Figure 3 16 Pulse Profile Measurement 3 27 Phase Matrix Inc 585C 588C With the optional internal delaying pulse generator frequency profiling is further simplified For example consider the repetitive pulsed signal shown below which is ramping from 5 GHz to 5 2 GHz Using the delaying puls
83. f the address need not be changed the function may be terminated by pressing the CLEAR DISPLAY or CLEAR DATA keys After this function has been activated the GPIB address can be changed by entering a two digit decimal number between 01 and 99 The function is terminated and the display returned to displaying measurement results after the second digit key is released Refer to the GPIB interface section on page 5 15 for the meanings of GPIB addresses above 31 ONE SHOT SPC INDICATOR ON SPECIAL FUNCTION 91 YIG DAC Automatic Calibration CAUTION Care must be used when operating Special Function 91 Although the counter cannot be damaged by this function improper operation of it can affect the counter calibration For this reason access to this function is blocked by an internal memory protect feature Attempting to access this function with the memory protected causes the counter to display ERROR 53 This function is used to calibrate the Band 2 input filter Refer to the service manual for more information 3 57 Phase Matrix Inc 585C amp 588C SPECIAL FUNCTION 92 Gate Accuracy Calibration CAUTION Care must be used when operating Special Function 92 Although the counter cannot be damaged by this function improper operation of it can affect the counter calibration For this reason access to this function is blocked by an internal memory protect feature Attempting to access this functio
84. g the power meter set the output signal level from the synthesized sweeper to 20 dBm frequency reading Repeat steps 3 4 and 5 at 3 GHz 6 GHz 10 GHz 12 4 GHz at 25 dBm 15 GHz 18 GHz and 20 GHz at 20 dBm For Model 588C counters also test at 22 GHz 24 GHz and 26 5 GHz at 15 dBm 6 6 6 OPERATIONAL VERIFICATION TESTS TEST SETUP 2 585C 588C COUNTER POWER METER oo SYNTHESIZED SWEEPER PULSE 3 DB MODULATOR 3 DB PAD PAD POWER SENSOR PULSE GENERATOR Oo o o o OSCILLOSCOPE O O o OUTPUT o 0000 Oo le O 50 OHM TERMINATION Figure 6 5 Band 2 Pulsed Signal Range and Sensitivity Test Setup PROCEDURE For this test three pulse modulators and two directional couplers are used Use the devices that correspond to the frequency under test See Table 5 1 for a listing of frequency ranges of the pulse modulators and directional couplers 1 Connect equipment as shown in Figure 6 5 2 Set the 585C 588C counter to Band 2 and select resolution 3 3 Using the oscilloscope set the pulse generator to output a 100 ns wide TTL signal with a 1 MHz repetition rate This signal is used to drive the pulse modulators Set the synthesized sweeper to 1 GHz Apply a constant enable signal from the pulse generator to the pulse modulator Adjust the output
85. he resulting IF frequency It continues to do so until the SPECIAL FUNC 83 and CLEAR DATA keys are pressed The OFS annunciator is turned on ONE SHOT SPC INDICATOR OFF SPECIAL FUNCTION 76 EEPROM Checksum Test This special function calculates a checksum based on the data contained in the EEPROM and compares the calculated checksum to the checksum stored in the EEPROM If the calculated checksum is the same as the stored checksum the counter displays PASSEd If the counter displays ERROR 94 the calculated checksum is different from the stored checksum Although pressing clear display does clear the error the counter should not be used it must be recalibrated to ensure proper operation ONE SHOT SPC INDICATOR ON SPECIAL FUNCTION 77 Enable Pulse Profile This function is used to automatically profile the frequency of a repetitive pulsed microwave signal When this function is activated the counter displays 000000 000 Inc At this point the desired measurement increment is entered After a valid measurement increment has been entered the counter displays O00000 000 End At this point the maximum delay time relative to the trigger is entered This function only sets up the measurement increment and last measurement time The front panel Pulse Generator control keys are used to select the trigger source Mode and measurement window Width ONE SHOT SPC INDICATOR ON SPECIAL FUNCTION 78 Dis
86. he rough amplitude measurement result Special Function 20 Outputs the low frequency limit last specified OUTPUT MEMORY Outputs the content of memory in the last accessed location Special Function 46 OUTPUT MINPRF Outputs the minimum PRF last specified OUTPUT MULTIPLIER Outputs the last specified multiplier value OUTPUT OFFSETFREQ Outputs the frequency offset last specified OUTPUT RESOLUTION OUTPUT SAMPLERATE Outputs the last specified frequency measurement resolution Outputs the last specified delay time between measurement values OUTPUT SRQMASK Outputs the combination of status events required to cause a service request See page 5 11 OUTPUT SUBBAND Outputs the number of the last specified subband OUTPUT V1FREQ OUTPUT V2FREQ OUTPUT V1FREQ Outputs the last specified stop frequency for VCO sweep OUTPUT Y1FREQ Outputs the last specified start frequency for YIG sweep Special Function 40 OUTPUT Y2FREQ Outputs the last specified stop frequency for YIG sweep Special Function 40 5 6 PULSE GENERATOR CONTROL MESSAGES Table 5 6 Pulse Generator Control Messages GEND Argument lt number gt Terminator s ms us ns 5 PROGRAMMING Description Last pulse delay in auto profile measurement GDELAY lt number gt s ms us ns Pulse delay from trigger GINCREMENT lt number gt s ms us ns Delay increment for auto
87. ilter 80 Disable Band 0 Low Pass Filter 81 Measurement Averaging 82 Frequency Multiplier 83 Frequency Offset 87 Enable Constant Threshold 88 Disable Constant Threshold 90 Display Alter GPIB address The following special functions set up the counter in special modes to aid in troubleshooting or to initiate calibration routines These functions should only be used by qualified technicians for calibration and repair Special Function Description 20 Band 2 Detected RF Level 40 Sweep YIG DAC 41 Sweep VCO with VCO Power Amp On 42 Sweep VCO with VCO Power Amp Off 44 Disable Normal Operations 45 Enable Normal Operations 46 Display and or Alter Memory 47 Measure IF Only 91 YIG DAC Automatic Calibration 92 Gate Accuracy Calibration 93 Calculate EEPROM Checksum 3 42 3 OPERATION ACTIVATION OF SPECIAL FUNCTIONS CAUTION Executing Special Function 46 91 92 or 93 can cause a loss of calibration data To prevent this from occurring access to these functions is blocked by an internal memory protect feature Attempting to access these functions with the memory protected causes the counter to display ERROR 53 Special functions can be activated through both the front panel keyboard and the GPIB interface To activate a special function through the keyboard press the SPECIAL key followed by two digit keys To activate a special function through the GPIB interface enter the word SPECIAL followed by a two digit number Activating spe
88. ing Special Function 77 and a computer VCO SETTLING TIME MEASUREMENTS Many complex signals are not pulsed at all but are continuous signals with frequencies that vary repetitively over time One example is a settling time measurement of a voltage controlled oscillator VCO When a voltage step is applied to the tuning voltage input on a VCO its output frequency changes to reflect the voltage change on the tuning input However as shown in Figure 3 18 it takes the VCO a finite amount of time to settle in at the new frequency The amount of time it takes for the VCO to settle in at the new frequency within some predetermined limits is specified as its settling time A typical VCO settling time specification would require that the frequency output be within 10 MHz of the settled frequency within 1 ms after the voltage step is applied to the tuning input on the VCO INPUT SIGNAL lt PROFILE MEASUREMENT WINDOW FREQUENCY PROFILE AVERAGE Figure 3 18 VCO Settling Time Measurements 3 29 Phase Matrix Inc 585C 588C VCO settling time measurements can easily be made using the counter and a delaying pulse generator either external or the optional internal delaying pulse generator as shown in Figure 3 19 VCO TO BE 585C 588C COUNTER INHIBIT TESTED 2 d INPUT FREQUENCY MODULATED SIGNAL MODULATION MI
89. ingle parameter gt lt result parameter gt Single parameter RESOLUTION BAND SUBBAND AVERAGE MULTIPLIER ERRORNUMBER SQRMASK CONFIGURATION LEVEL MEMORY IDENTIFICATION LOWLIMIT HIGHLIMIT OFFSETFREQ CENTERFREQ MINPRE SAMPLERATE KEYCODE SETUP Result parameter DEFAULT lt result list gt Result list lt result name gt lt result name gt lt SPACE gt AND lt SPACE gt lt result name gt lt result name gt lt SPACE gt AND lt SPACE gt lt result name gt lt SPACE gt AND lt SPACE gt lt result name gt Result name FREQUENCY WIDTH PERIOD Example To request the controller to display the width and frequency in that order the Operator enters Send 0 18 OUTPUT WIDTH AND FREQUENCY NLend Receive 0 18 A StopEnd Print A OUTPUT AND FORMAT EXAMPLES The following program segment illustrates how controllers function with the counter This program sets the counter up in a sample configuration and programs it to make a measurement of a 12 5 GHz pulsed signal with a 13 258 ms period The talk and listen address of the counter is assumed to be 18 Dimension A 36 Send 0 18 IN NLend Wait 4000 Send 0 18 WI ON RE 4 NLend Send 0 18 HI 17 5 GHZ LO 1 1 GHZ NLend Wait 1000 Send 0 18 OUTPUT WI AND FR NLend Wait 1000 Receive 0 18 A StopEnd Print A 5 10 5 PROGRAMMING This program initializes the counter provides a resolution valu
90. ion and alters it altering is optional Special Function 46 Accesses next memory location Special Function 46 MEMORY Decrement lt hex_data gt Accesses previous memory location Special Function 46 MINPRF lt number gt Hz kHz MHz GHz Sets a minimum PRF value MULTIPLIER OFFSETFREQ RESOLUTION lt number gt lt number gt lt number gt None Hz kHz MHz GHz Inputs a multiplier value 01 to 99 Sets a frequency offset value Sets the frequency measurement resolution 0 to 9 SAMPLERATE lt number gt Sets a delay between measurement values 0 to 100 sec 10 ms resolution SPECIAL lt number gt Activates a specific special function 00 to 99 SRQMASK STORE lt number gt lt number gt None Selects the ORed combination of status events to cause a service request Stores current counter setup in specified storage register 0 to 9 See Special Function 72 SUBBAND lt number gt None Selects a specific Band 3 subband 1 to 6 V1FREQ lt number gt Hz kHz MHz GHz Sets a start frequency for VCO sweep Special Functions 41 42 V2FREQ lt number gt Hz kHz MHz GHz Sets a stop frequency for VCO sweep Special Functions 41 42 Y1FREQ lt number gt Hz kHz MHz GHz Sets a start frequency for YIG sweep Special Function 40 Y 2FREQ Y3FREQ lt number gt lt nu
91. iously entered frequency is the required start frequency the user presses the kHz key to tell the special function to continue After the start frequency is entered the counter waits for the user to enter the stop frequency of the YIG sweep The previously entered stop frequency and F2 are displayed in the frequency section and the pulse parameter section of the display respectively The special function stops in this state until the user enters a new stop frequency or if the previously entered frequency is the required stop frequency the user presses the kHz key to tell the special function to continue When both the start and stop frequencies have been entered the display reverts to displaying SPECIAL 40 The YIG DAC sweeps continuously from F1 to F2 until the function is terminated If F1 and F2 are equal the YIG DAC is set to the frequency corresponding to F1 and F2 To activate this function in remote the user programs the controller to output SPECIAL 40 The start and stop frequencies used are the frequencies specified in the GPIB commands Y1FREQ and Y2FREQ where YIFREQ and Y2FREQ correspond to F1 AND F2 respectively If the start or stop frequency required is different from that specified in YI FREQ or Y2FREQ respectively the number in that frequency register must be updated before Special Function 40 is activated STOP RESET SPC INDICATOR ON 3 47 Phase Matrix Inc 585C amp 588C SPECIAL FUNCTION 41
92. is rounded up to the next higher integer At this point low side mixing NFyco lt Fin is assumed and the proper VCO frequency is calculated using the formula Fyig 120 MHz N Fyco gt If the results yield a VCO frequency which is less than 400 MHz the minimum VCO frequency high side mixing is assumed and Fyco is recalculated using the formula Fyig 120 MHz N Fyco gt At this point the IF gain is adjusted to set the signal level approximately 6 dB above signal threshold Since Fyjg is only approximately equal to Fin the IF frequency Fs is not exactly 120 MHz therefore the next step is to adjust the Fyco to shift Fin to the center of the IF passband at 120 MHz This is done by counting F f and recalculating Fyco based on the following formula Fyig Fig F VCO N Where F is used if high side mixing and Fp is used if low side mixing 3 22 3 OPERATION Once the VCO corrections have been made the counter counts the IF and calculates the input frequency using the following formula and then displays the results Fin Nx Fyco Fr Where N Harmonic number Fyco VCO frequency for low side mixing and for high side mixing After each measurement new frequencies for the YIG and VCO are calculated to maintain the IF at 120 MHz and the IF gain is readjusted to keep the signal 6 dB above threshold This method provides rapid tracking of a signal being tuned SIGNAL MEASUREMENTS
93. ister that contains current information on the status of the instrument This register called the status byte can be accessed through the GPIB using the serial poll command When serial polled the counter responds by returning a numeric value between 0 and 256 This value is the weighted sum of the status bits which are set The status byte structure is shown in Figure 5 1 For example a value of 132 indicates that the GPIB input buffer is empty and the counter is in the search mode 5 12 5 PROGRAMMING bit7 6 5 4 3 2 1 bio 128 64 32 16 8 4 2 1 Input buffer empty IRQ bit Master Summary Status Error condition Overload Gate on Search on Signal found Valid measurement result data ready Figure 5 1 Status Byte Structure SERVICE REQUEST MASK The counter can be instructed to send an interrupt by setting the SRQ line on the GPIB when any ORed combination of the bits in the status byte are set This is done by sending the counter a service request mask For example to instruct the counter to generate an SRQ whenever it has valid data available or an error condition exists send the following service request mask Send 0 18 SRQMASK 33 NLend This would tell the counter to generate an SRQ whenever bit 0 and bit 5 of the status byte are set Since bit 0 corresponds to valid measurement result ready and bit 5 corresponds to
94. ith the trigger pulse synchronous with the sequence In this measurement the input inhibit is used to discriminate between pulses The enabling pulse can be slightly wider than the pulse to be measured By shifting the delay time of the enabling pulse the user can measure each input pulse of the sequence separately 3 30 3 OPERATION TIMING CONSIDERATIONS The internal timing usually should be of no concern to the user However in applications where a few nanoseconds are significant two factors of internal operation must be considered These involve two areas One factor is the measurement window width and the other is synchronization with external signals Measurement Window Width The measurement window width is the period during which the gate is actually open to enable the counting of a signal This gate width is typically 30 ns narrower than the pulse applied to the INHIBIT IN connector The width of the gate is always an integral number of clock periods 12 5 ns For applications where the measurement window must be known to an accuracy better than 20 ns it is recommended that the gate output on the rear panel be observed on a high speed oscilloscope The desired gate width may be set by varying the input inhibit pulse width For accurate pulse representation the oscilloscope input should be terminated in a 50 Q load Synchronization When it is necessary to measure the signal frequency at a precise point in time the internal del
95. k Internal adjustments or servicing that must be done with the AC power cord connected must be performed only by qualified personnel Phase Matrix Inc 585C amp 588C WARNING Since the power supply filter capacitors may remain charged after the AC power cord is disconnected from the equipment disconnecting the power cord does not ensure that there is no electrical shock hazard gt WARNING Some of the components used in this instrument contain resins and Qe other chemicals that give off toxic fumes if burned Be sure to Y dispose of these items properly WARNING Beryllia beryllium oxide is used in the construction of the YTF Qe assembly This material if handled incorrectly can pose a health y hazard NEVER disassemble the microwave converter assembly CAUTION Static sensitive components are used in the YTF assembly These components can be damaged if handled incorrectly CAUTION Before connecting power to the instrument ensure that the correct fuse is installed and the voltage selection switch on the instruments rear panel is set properly Refer to Section 2 Installation CAUTION Excessive signal levels can damage this instrument To prevent damage do not exceed the specified damage level Refer to the instrument specifications in Section 1 of this manual gt gt vi TABLE OF CONTENTS WRIA ove 2 Sees e oh 5 eG hts oe and Sot ate lee A ARE AD ook Ge d a iii CERTIFICATION co tek i
96. l input impedance of 50 Q and is used for measurements in the range of 250 MHz to 1 GHz e BAND 2 precision N female for Model 585C GPC 3 5 female for Model 588C has a nominal input impedance of 50 Q and is used for measurements in the range of 1 GHz to 20 GHz 26 5 GHz for 588C e BAND 3 Optional for Model 588C only SMA female Used for measurements in the range of 26 5 to 170 GHz This input is used in conjunction with the Model 890 Frequency Extension Cable Kit and a remote sensor REAR PANEL CONTROLS AND CONNECTORS Eo S X A 100 VA MAX GPIB IEEE488 1978 Figure 3 4 Rear Panel Controls and Connectors BAND 0 BAND 1 BAND 2 and BAND 3 are provided on instruments with optional rear panel inputs Option 5803 3 4 3 OPERATION THRESH OUT is the digitized pulse envelope When the counter has a converter lock and a signal is present the output is a TTL high into 50 Q Without a converter lock the output is a TTL low The Thresh Out and the Gate Out together show exactly where in the pulse the measurement is being taken GATE OUT represents the gate to the Count Chain board The gate output follows the actual gate not the gate enable When the gate is active the output is a TTL high into 50 Q otherwise the output is a TTL low The Threshold Out and the Gate Out together show exactly where in the pulse the measurement is being t
97. l will occur When a part or assembly in an Phase Matrix Inc instrument is changed to the extent that it is no longer interchangeable with the earlier part the configuration control number CCN of the instrument shown on the title page of the manual will change and a new edition of the manual will be published To maintain the technical accuracy of the manual it may be necessary to provide new or additional information with the manual In these cases the manual is shipped with a Manual Update Please be sure to incorporate the information as instructed in the Manual Update 111 Phase Matrix Inc 585C amp 588C SAFETY The Phase Matrix 585C amp 588C are designed and tested according to international safety requirements but as with all electronic equipment certain precautions must be observed This manual contains information cautions and warnings that must be followed to prevent the possibility of personal injury and or damage to the instrument SAFETY AND HAZARD SYMBOLS WARNING A WARNING denotes a hazard to personnel It calls attention to a procedure or practice which if not correctly performed or adhered to could result in personal injury CAUTION A CAUTION denotes a hazard to the equipment It calls attention to an operating procedure or practice which if not correctly performed or adhered to could result in damage to or destruction of part or all of the product This is a general warning that appear
98. lly acceptable Following are the possible GPIB command messages for the 585C 588C series of counters 5 3 Phase Matrix Inc 585C amp 588C CONTROL MESSAGES Control mode and parameter messages are all used with the controller in the talker mode to send instructions and data as shown in Table 5 2 Table 5 3 and Table 5 4 Table 5 2 Control Messages CLEARDISPLAY Argument Terminator Description Returns the display to normal measurement results display clear error Equivalent to front panel CLEAR DISPLAY key INITIALIZE Reconfigures the instrument to power on state Equivalent to front panel INIT LOCAL key RESET Resets counter to restart a new signal measurement cycle Equivalent to front panel RESET key TRIGGER Table 5 3 Mode Messages Header DYNAMIC Argument ON or OFF Terminator Triggers a new measurement cycle Equivalent to front panel TRIG key Description Suppresses blanks when counter is configured in talker mode for faster free field data transfer EXTERNAL ON or OFF Selects the INT EXT timebase reference Special Function 08 can also be used to select the external timebase HEADER ON or OFF Adds an alpha header and terminator for talker HOLD ON or OFF Holds the last result if on Equivalent to front panel HOLD PERIOD ON or OFF Turns pulse period measurement on or off Equivalent to front p
99. mber gt Hz kHz MHz GHz Hz kHz MHz GHz Sets a stop frequency for YIG sweep Special Function 40 Sets YIG frequency Special Function 20 5 5 Phase Matrix Inc 585C amp 588C OUTPUT CONTROL MESSAGES The commands listed in Table 5 5 are used with the controller in the talker mode to request the output of data Table 5 5 Output Control Messages Header OUTPUT BAND Description Outputs the number of the last specified band OUTPUT CENTERFREQ OUTPUT DATE Outputs the center frequency last specified Outputs a 42 character string that shows the revision level and date code of the software The format is HHHHH REV X MM DD YY OUTPUT DEFAULT Outputs displayed data OUTPUT DELTAF Outputs the last specified AF value OUTPUT ERRORNUMBER Outputs the number of the last error See listing of error numbers in Section 3 OUTPUT FREQUENCY AND WIDTH AND PERIOD Controls which measurement results to output Note More than one measurement result is optional The order of the results is preserved in the output These three frequency width and period can be used in any combination OUTPUT HIGHLIMIT Outputs the high frequency limit last specified OUTPUT IDENTIFICATION Outputs EIP59nA GPIB da where n is 5 or 8 and dd is the GPIB address OUTPUT KEYCODE OUTPUT LEVEL OUTPUT LOWLIMIT Outputs the code of the last key pressed Outputs t
100. mbination of timebase error gate phasing error 1 count and gate width error In making frequency measurements on pulsed RE signals the preceding errors along with one additional error due to distortion of the pulsed RF signal affect measurement accuracy To minimize these errors and to properly interpret the results of the measurements the magnitude of these errors must be known NOTE A Microsoft Excel spreadsheet that automatically calculates pulse accuracy and acquisition measurement times is available for download from the Phase Matrix Web site To download the spreadsheet point your Web browser to lt htip www phasematrix com prodpages 58XC html gt and click the link for the Pulse Calculator note where you select to have the file saved on your hard disk When the download is complete run elppulse exe Select the location on your hard drive where you want to save the Pulse Calculator spreadsheet open the spreadsheet in Excel and follow the directions 3 32 3 OPERATION CW MEASUREMENT ACCURACY When measuring CW signals the measurement accuracy is specified as Total error timebase error 1 count Based on measurement averaging Timebase error causes an error in the measured frequency proportional to the error in the timebase oscillator For example if the 10 MHz oscillator is off frequency by 3 Hz the corresponding measurement error on a 1 GHz signal would be 300 Hz For an 18 GHz signal the same 3 Hz error in
101. mounting hardware provided in the kit Two rack mounts and mounting hardware for both sides of the instrument are included Figure 4 2 Rack Mount Kit M585C ACC021 RACK MOUNT KIT WITH HANDLES M585C ACCO21 2011121 01 585C PARTS LIST 2011121 01 588C Reference Phase Matrix Designator Description Part Number 1 RACK MOUNT WITH D HANDLE GRAY 3 50 INCH 5210435 12 2 NUT FLANGE 8 32 5210441 01 3 SCREW FLANGE HEAD X REC 100 SLFLKG 8 32 X 5 16 5149001 05 4 HARDWARE KIT RACK MOUNT US 2010414 01 5 HARDWARE KIT RACK MOUNT METRIC 5000262 00 6 TRIM STRIP HANDLE GRAY 3 25 INCHES 5210440 12 7 END CAP D HANDLE GRAY 5220049 02 43 Phase Matrix Inc 585C amp 588C RACK MOUNT KIT WITHOUT HANDLES M585C ACC022 This rack mount kit provides all the parts and hardware required to rack mount the instrument The rack mount brackets do not have handles Figure 4 3 shows one rack mount and the mounting hardware provided in the kit Two rack mounts and mounting hardware for both sides of the instrument are included Figure 4 3 Rack Mount Kit M585C ACC022 RACK MOUNT KIT WITHOUT HANDLES M585C ACCO22 2011122 01 585C PARTS LIST 2011122 01 588C Reference Phase Matrix Designator Description Part Number 1 RACK MOUNT WITHOUT HANDLE GRAY 3 50 INCH 5210433 12 2 NUT FLANGE 8 32 5210441 01 3 SCREW FLANGE HEAD X REC 100 SLFLKG 8 32 X 5 16 5149001 05 4 HARDWARE KIT RACK MOUNT US 2010414 01 5 HARD
102. n with the memory protected causes the counter to display ERROR 53 This function is used for calibration of the counter s measurement gate Refer to the service manual for more information SPECIAL FUNCTION 93 Calculate EEPROM checksum CAUTION Care must be used when operating Special Function 93 Although the counter cannot be damaged by this function improper operation of it can affect the counter calibration For this reason access to this function is blocked by an internal memory protect feature Attempting to access this function with the memory protected causes the counter to display ERROR 53 The EEPROM is non volatile memory which stores calibration data along with other instrument parameters After performing YIG DAC and or Gate Error calibrations this function commands the counter to compute a new checksum based on the new data and store the new checksum in the EEPROM At turn on the counter automatically calculates the checksum based on the stored data and compares the calculated checksum to the stored value If the two checksums are not the same the counter displays Error 94 Although pressing clear display does clear the error the counter should not be used it must be recalibrated to ensure proper operation ONE SHOT SPC INDICATOR ON 3 58 3 OPERATION ERROR MESSAGES When an error occurs an error number is displayed The probable cause of each error is listed below ERROR NUMBERDEFIN
103. ncy display in a floating point format e Status display A series of annunciators provided to indicate current operating status of the counter see Figure 3 2 e Keyboard Both data entry and function selection are controlled through the keyboard see Keyboard Operation on page 3 7 STATUS DISPLAY PW LO PRF LSN PP HI HLD TLK DLY CF SPC SRQ 07 ac EXT RMT Figure 3 2 Status Display sec indicates pulse parameters are being displayed in seconds e ms indicates pulse parameters are being displayed in milliseconds e us indicates pulse parameters are being displayed in microseconds e dBm not used e BO lights when Band 0 is selected e Bl lights when Band 1 is selected e B2 lights when Band 2 is selected e B3 lights when any sub band of Band 3 is selected e PW pulse width lights when the pulse width display function is selected 3 2 3 OPERATION PP pulse period lights when the pulse period display function is selected DLY delay lights when the pulse generator optional display delay function is selected LO frequency limit low lights when a low limit other than the factory default is being used HI frequency limit high lights when a high limit other than the factory default is being used CF center frequency lights when the center frequency mode of operation is enabled GEN generator lights when optional delaying pulse g
104. ormance of the procedures and are included to assist in the selection of alternative equipment Satisfactory performance of alternative items should be verified prior to use All applicable equipment must bear evidence of current calibration For many of the following tests an Phase Matrix 578B counter is used to source lock the microwave sweeper thus providing a stable source for testing This combination may be replaced by a frequency synthesizer Table 6 1 Equipment Requirements Description Critical Parameters Recommended Manufacturer Frequency Synthesizer 100 Hz to 10 MHz Agilent Synthesized Sweeper 10 MHz to 40 GHz Agilent 83640B Synthesized Sweeper 2 GHz to 20 GHz Agilent 83624B Source Locking Counter 10 MHz to 26 5 GHz Phase Matrix 578B Spectrum Analyzer 3 GHz to 18 GHz Agilent 8566B Phase Matrix Inc 585C amp 588C Table 6 1 Equipment Requirements Continued Description Power Meter Power Sensor Critical Parameters 10 MHz to 60 GHz 10 MHz to 18 GHz Power Sensor Power Sensor 20 to 10 dBm 950 MHz to 26 5 GHz 20 to 10 dBm 26 5 GHz to 40 GHz 20 to 10 dBm Recommended Manufacturer Agilent Agilent Agilent Agilent 437B 8481A 8485A R8486A Oscilloscope 100 Hz to 10 MHz Tektronix 2445 Directional Coupler 950 MHz to 18 GHz Narda 4226 10 Directional Coupler 18 GHz to 26 5 GHz Narda 4017C 10 Pulse
105. ounting hardware for both sides of the instrument are included Figure 4 5 Chassis Slide Kit M585C ACC101 CHASSIS SLIDE KIT M585C ACC101 2011123 01 585C PARTS LIST 2011123 01 588C Reference Phase Matrix Designator Description Part Number 1 SLIDE CHASSIS 370QD 24 INCH 5000366 00 2 RACK MOUNT W HANDLES GRAY 3 50 INCH 5210435 12 3 BRACKET RACK MOUNT SLIDE 5210953 01 4 NUT FLANGE 8 32 5210441 01 5 SCREW FLATHEAD X REC 100 SLFLKG 8 32 X 5 16 5149001 05 6 SCREW PANHEAD X REC SLFLKG 8 32 X 1 4 UNC 5124008 04 7 HARDWARE KIT RACK MOUNT US 2010414 01 4 7 Phase Matrix Inc 585C amp 588C CHASSIS SLIDE KIT M585C ACC101 PARTS LIST continued 2011123 01 585C 2011123 01 588C Reference Phase Matrix Designator Description Part Number 8 HARDWARE KIT RACK MOUNT METRIC 5000262 00 9 MOUNTING KIT BRACKET SLIDES W HARDWARE 5000277 00 10 NUT BAR 10 32 5000278 00 11 SCREW PANHEAD X REC 10 32 X 9 16 UNF 5120010 59 12 SCREW PANHEAD X REC 8 32 X 3 8 UNC 5120008 06 13 WASHER FLAT CRES NO 8 5160008 00 14 NUT KEPS 8 32 UNC 2B 5186008 32 15 STRIP TRIM HANDLE GRAY 3 25 INCHES 5210440 12 16 CAP END HANDLE GRAY 5220049 02 17 DRAWING SLIDE ASSY CHASSIS W HANDLES 5520024 00 4 8 4 ACCESSORIES CHASSIS SLIDE KIT INCLUDES RACK MOUNT KIT WITHOUT HANDLES M585C ACC102 This chassis slide kit provides all the parts and hardware required to rack mount the instrument on
106. power on the sweep generator until the power meter indicates the specified sensitivity level for the counter 6 Apply the modulation drive from the sweep generator to the appropriate pulse modulator and connect the pulse modulated signal to the counter 7 Verify that the counter counts the pulsed signal properly and record the results 6 7 Phase Matrix Inc 585C amp 588C 8 Repeat steps 4 5 6 and 7 at 3 GHz 6 GHz 10 GHz 12 4 GHz 15 GHz 18 GHz and 20 GHz For Model 588C counters change the pulse width from the modulator to 500 ns and test at 22 GHz 24 GHz and 26 5 GHz BAND 2 AMPLITUDE DISCRIMINATION TEST DESCRIPTION This test verifies that the counter accurately measures the larger of two signals differing in amplitude by 15 dB or more EQUIPMENT e Synthesized Sweeper Agilent 83640B e Synthesized Sweeper Agilent 83624B e Spectrum analyzer Agilent 8566B e Power splitter Agilent 11667B used as signal combiner SYNTHESIZED SWEEPER 585C 588C COUNTER SEO RF OUT A oo BAND 2 INPUT HP 116678 SIGNAL SPECTRUM ANALYZER SYNTHESIZED SWEEPER COMBINER e RF OUT Figure 6 6 Band 2 Amplitude Discrimination Test Setup PROCEDURE 1 Connect equipment as shown in Figure 6 6 2 Set signal generator 1 to 3 0 GHz at 0 dBm and set signal generator 2 to 3 1 GHz at 6 dBm 3 Using the spectrum analyzer adjust the generator po
107. profile measurement See Special Function 77 GWIDTH lt number gt s ms us ns Pulse width GPERIOD OUTPUT GDELAY none none Pulse period Trigger mode Turns off pulse generator Trigger external Trigger continuous Trigger on signal threshold Outputs the last pulse delay OUTPUT GEND Outputs the last pulse delay in profile OUTPUT GINCREMENT Outputs the last delay increment in profile OUTPUT GPERIOD OUTPUT GWIDTH Outputs the last pulse period Outputs the last pulse width OUTPUT GMODE none even Outputs the last trigger mode 0 0FF 1 EXT 2 CONT 3 THRESHOLD PROFILE ON or OFF ad Turns the pulse profile function on or off Special Function 77 except increment and end values are entered using the GINCREMENT and GEND GPIB commands SYNTAX DEFINITION In the instructions that follow means or and N S means null or space The format used for the examples is generic for HP controllers Sample formats can easily be adapted for other controllers DEVICE DEPENDENT MESSAGE lt message gt lt N S gt lt message terminator gt lt message gt lt message separator gt lt message gt lt message terminator gt Message lt control message gt lt mode message gt lt parameter message gt lt output control message gt Message separator Message terminator CR LF NL EOI 5 7 Phase Matrix Inc 585C 588C 1 CONTROL
108. r which feeds a flash A D converter with a resolution of approximately 5 dB When the counter detects a signal the YIG DAC setting and relative amplitude of the signal output from the flash A D is stored in memory and the search routine continues If other signals are detected their relative amplitudes are compared with the stored information If the new signal 3 21 Phase Matrix Inc 585C amp 588C is higher in amplitude the memory is updated with information on the new signal After searching the entire band the YIG DAC setting and relative amplitude of the highest signal present are stored in memory The next step is to precisely center the YIG on the selected signal This process begins by moving the YIG to the signal selected during the search routine The YIG is then stepped in 2 MHz steps around the signal until four points are found the points on either side of the peak 1 25 dB down from the peak and the points on either side of the peak 5 dB down from the peak From these points the approximate center of mass frequency of the signal is found and the YIG filter is set to that frequency The center of mass algorithm compensates for pulsed signals that deviate from perfect sinX X shape and for nonsymmetries in the YIG filter After the YIG is centered on the signal the harmonic number N is calculated based on the setting of the YIG filter using the following formula Fyig 120 MHz 500 MHz The resulting N
109. s and performs both frequency measurements and pulse parameter measurements pulse width and pulse period The basic counter can directly measure the frequency of signals from 100 Hz to 250 MHz VCO FROM BAND 2 400 505 MHz DIVIDE BY 4 CONVERTER PRESCALER o WAVESHAPING COUNT NETWORK FROM e CHAIN SIGNAL gt DELAY CONDITIONER LINE FROM IF THRESHOLD GATE GATE DETECTOR GENERATOR gt ACCUMULATOR 80 MHz PHASE 10 MHz REAR PANEL LOCKLOOP TIMEBASE Figure 3 6 Block Diagram of Basic Counter Overall operation of the counter is controlled by the CPU assembly This assembly contains a Motorola 68B09 microprocessor its control logic the system memory and the circuitry for the GPIB interface It communicates with all other assemblies in the counter via a triple bus system the data bus address bus and control bus Each assembly except for the Signal Conditioner and Gate Control contains a peripheral interface adapter PIA that provides the interface between the bus system and the counter hardware The basic counter performs frequency measurements by comparing the unknown signal to a reference frequency namely the timebase The standard timebase is a 10 MHz temperature compensated crystal oscillator TCXO An optional high stability ovenized oscillator is also available for improved frequency accuracy For coherence with
110. s whenever care is necessary to prevent damage to the equipment Dangerous Voltage gt gt pe Toxic Substance Static Sensitive Component Fire Hazard gt gt iv OVERALL SAFETY CONSIDERATIONS A A gt e e WARNING Before this instrument is switched on its protective earth terminals mustbe connected to the AC power cord s protective conductor The main plug must only be inserted in a socket outlet that has a protective earth contact The protective action must not be negated by using an extension cord power cable or adapter that does not have a protective earth grounding conductor WARNING Use only fuses of the type specified with the required current and voltage ratings Never use repaired fuses or short circuited fuseholders as doing so causes a shock and or fire hazard WARNING Whenever it is likely that electrical protection is impaired the instrument must be made inoperative and be secured against any unintended operation WARNING All protective earth terminals extension cords autotransformers and other devices connected to this instrument must be connected to a socket outlet that has a protective earth contact Any interruption of the protection causes a potential shock hazard that can result in personal injury WARNING The power supply is energized whenever AC power is connected to this instrument Disconnect the AC power cord before removing the covers to prevent electrical shoc
111. stop frequency the user presses the kHz key to tell the special function to continue When both the start and stop frequencies have been entered the display reverts to SPECIAL 42 The VCO sweeps continuously from F1 to F2 in 100 kHz steps until the function is terminated The sweep rate is controlled by the sample rate Maximum sweep rate may be obtained by disabling 3 48 3 OPERATION the sample rate Special Function 63 before calling this function If Fl and F2 are equal the VCO is set to that particular frequency The VCO power amplifier is turned off during this function To activate this function in remote the user instructs the controller to output SPECIAL 42 The start and stop frequencies used are the frequencies specified in the GPIB commands V1FREQ and V2FREQ where VIFREQ and V2FREQ correspond to F1 and F2 respectively If the start or stop frequency required is different from that specified in VIFREQ or V2FREQ the number in that frequency register must be updated before SPECIAL 42 is activated SPECIAL FUNCTION 44 Pause Normal Counter Operation This function prevents the counter from performing the normal converter lock and measurement cycles It freezes the counter in the state it was in at the moment the function was activated The display shows PAUSE and the STOP ON OFF status bit is set when this function is active Special Function 44 remains activated until terminated through Special Function 45 or by
112. system clocks the counters have the capability of accepting an external 10 MHz reference via the rear panel 10 MHz IN OUT connector A frequency measurement is made by generating a time interval gate time consisting of a number of cycles of the reference This gate time is used as an interval during which the input signal is counted by the Count Chain assembly This process is considerably more difficult for pulsed signals than it is for CW signals and must be accomplished as a two step operation The first step is to supply a gate to the Count Chain that is present only when an input signal is also present The second step is to accumulate the total time during which the gate is applied until the desired gate time is reached The first step requires that the gate begin after the signal is present at the Count Chain and end prior to the end of the signal This is accomplished by generating a gate approximately 30 ns shorter than the RF signal The arrival time at the Count Chain of the IF from the converter is then controlled by a delay line so the gate signal falls entirely within the IF pulse width 3 18 3 OPERATION The second step is accomplished by counting reference clock pulses whenever the gate is open until a total time equal to R goigtion is obtained This requires that each gate opening be an exact integral number of clock pulses Since an 80 MHz clock is being used the gate is always an exact multiple of 12 5 ns Pulse widths ar
113. t the rear panel 10 MHz IN OUT connector The frequency measured F mea is then used in the following formula to determine measurement error 10 MHz F mea TBE 10 MHz where F mea measured timebase frequency and F input frequency XF 3 39 Phase Matrix Inc 585C amp 588C e RMS AVERAGING ERROR RES B 1 AE RMS 2 ands 1 and 3 RMS GW AVG RES Band 2 AE RMS RES __ ame RMS GW AVG Where RES specified counter resolution in Hz up to 1 MHz Above 1 MHz resolution the counter s internal resolution remains at 1 MHz GW pulse width AND inhibit signal 30 ns and AVG number of measurements averaged NOTE 1 B If GW is gt RES then AE 1 count GATE ERROR Worst Case 0 07 Band 1 GE GW Band 2 GE a Bd GE 2 ae Where GW pulse width AND inhibit signal 30 ns DISTORTION ERROR Worst Case 7 0 03 DE BW_30 ns Where PW pulse width TOTAL ERROR sum of individual errors 3 40 3 OPERATION SPECIAL FUNCTION DIRECTORY The Phase Matrix Models 585C 588C provide a wide variety of special functions These special functions are divided into three major categories 1 Counter operation verification 2 Counter setup and capability enhancements 3 Calibration and troubleshooting aids The following special functions are used to verify proper operation Special Function 01 is the most comprehensive because it tests most of
114. te OUTPUT SPEED Several options have been provided in the GPIB interface for the user who wants to increase the output speed of the counter Each of the following conditions increases the measurement cycle rate The fastest measurement cycle time is achieved with all of the following conditions set HEADER OFF Outputs the numeric results without header or terminator default e SCIENTIFIC OFF Outputs fixed point results which are shorter than exponential notations default e DYNAMIC ON Suppresses leading blanks Note The controller has to have free field capability e SPECIAL 61 Disables the tracking feature thus saving the time required for YIG and VCO corrections e SPECIAL 63 Disables sample rate control thus deleting any delay between gates For counter in local mode e SPECIAL 65 Disables the LED results display thus saving the time required for display formatting and output e SAMPLERATE O Same as SPECIAL 63 for counter in remote mode READING MEASUREMENTS The Phase Matrix 585C 588C counters provide a choice of methods for taking readings When the command HOLD is ON the counter takes one reading then waits for a RESET command or a device trigger GPIB command In this condition the counter is sent a RESET command or a device trigger and when addressed to talk outputs a new reading to the bus The counter holds that particular reading on the display until another RESET command or device trigger is received
115. ted from the bus Execution of the device dependent messages starts after the first message separator is accepted Input of more characters interrupts the execution so that the additional characters are accepted and stored for fast bus response unless buffer is full e Output of measurement results or any parameter value or instrument mode on demand from the system controller e Configuration of the output format in several ways to accommodate different system controllers and speed requirements Implementation of device clear and selected device clear functions to configure the instrument to the power on state See page 5 14 for the counter s power on configuration Implementation of group execute trigger GET message to start a new measurement cycle Implementation of serial poll functions to allow the system controller to get a status byte from the instrument that gives status information for various functions The instrument can also be instructed to interrupt SRQ the controller on any ORed combination of the status events Implementation of remote local transitions When the counter is in remote all front and rear panel keys and switches are disabled except the POWER switch and the INIT LOCAL key Remote local transitions do not change any instrument configuration except the sample rate settings which does override in a remote to local transition When the counter changes from local to remote functioning or vice vers
116. the major subassemblies contained in the counter Special Function Description 01 200 MHz Self Test 02 Light Display Segments Test 03 Scan Display Segments Test 04 Scan Display Digits Test 05 Keyboard Test 06 Prom checksum Test 07 Display Counter Model Number 76 EEPROM checksum Test There are a wide range of special functions for counter setup and performance enhancement The most commonly used setup special functions include 08 72 74 81 and 90 The most commonly used performance enhancement special functions include 61 63 and 77 Special Function Description 08 External Timebase Select 09 Internal Timebase Select 10 Internally Disconnect Pulse Generator from the Counter 11 Internally Connect Pulse Generator to Counter 12 Trigger Pulse Generator on Falling Edge 13 Trigger Pulse Generator on Rising Edge 61 Disable Input Signal Tracking 62 Enable Input Signal Tracking 63 Disable Sample Rate Control 64 Enable Sample Rate Control 65 Disable Results Display 66 Enable Results Display 67 Display Pulse Repetition Frequency PRF 68 Display Pulse Period 69 Display Pulse Parameter Measurements Only 3 41 Phase Matrix Inc 585C amp 588C Special Function Description 70 Display Frequency and Pulse Parameter Measurements 72 Store Counter Setup and or Default Values 73 Recall Counter Setup 74 Relative Frequency Readings 75 Display IF Frequency Readings 77 Enable Pulse Profile 78 Disable Pulse Profile 79 Enable Band 0 Low Pass F
117. the timebase would cause a measurement error of 5 4 kHz The maximum error in the timebase is the sum of the various possible errors such as aging rate and temperature stability The second type of error 1 count is due to the lack of phase coherence between the gate and the signal Simply stated if an event occurs every 400 ms F 2 5 Hz a counter could measure either 2 or 3 events in a one second interval The above note based on measurement averaging is included due to a random instrumentation error in the counter This error can be virtually eliminated by averaging measurements PULSE MEASUREMENT ACCURACY Each of the sources of CW measurement error contributes to the overall error in pulsed frequency measurements along with gate error and distortion error For narrow pulses the gate phasing error referred to as averaging error and gate error can become the dominant sources of error for pulse measurements The following list describes the source of potential measurement errors when using the Phase Matrix 585C and 588C counters TIMEBASE ERROR A frequency error in the timebase reference oscillator results in a proportional frequency measurement error Two main sources of timebase error are aging rate and temperature stability Aging rates of less than 1 x 107 parts per month and temperature stability of 1 x 107 over the range of 0 to 50 C are standard on the 585C and 588C counters An optional ovenized time base provides
118. tion 69 That is the front panel is configured according to Special Function 67 if both Special Function 67 and Special Function 69 are activated The action taken with this function can be reversed by activating Special Function 68 ONE SHOT SPC INDICATOR ON SPECIAL FUNCTION 68 Display Period Function as Pulse Period This function reverses the action taken with Special Function 67 ONE SHOT SPC INDICATOR OFF SPECIAL FUNCTION 69 Display Pulse Parameter Measurements Only When this function is activated frequency measurements are not displayed on the front panel Instead the 12 digits on the front panel are devoted exclusively to displaying pulse parameter measurements to 10 ns resolution If the pulse period function is on this special function has a lower priority than Special Function 67 That is the front panel is configured according to Special Function 67 if both Special Function 67 and Special Function 69 are activated The action taken with this function can be reversed by activating Special Function 70 ONE SHOT SPC INDICATOR ON SPECIAL FUNCTION 70 Display Frequency and Pulse Parameter Measurement This function returns the counter to the normal mode of displaying measurement results reversing the action taken by Special Function 69 ONE SHOT SPC INDICATOR OFF 3 53 Phase Matrix Inc 585C amp 588C SPECIAL FUNCTION 72 Store Counter Setup and or Default Values This f
119. tion in the CW mode Next the counter is tested in the pulse mode using the pulse modulators to modulate the microwave source Attenuators are necessary on the input and output of the pulse modulators to reduce frequency pulling of the microwave source To be able to accurately set the power level of the pulsed signal it is necessary to compensate for the insertion loss of the pulse modulators by applying a constant enable signal to the pulse modulator and adjusting the sweeper at each test frequency until the output power from the modulator is at the required level EQUIPMENT e Synthesized Sweeper Agilent 83640B e Power meter Agilent 437B e Power sensor Agilent 8485A e Pulse generator Wavetek 801 e Pulse modulator Agilent 8731B e Pulse modulator Agilent 11720A e Pulse modulator Narda S214DS e Directional coupler Narda 4226 10 e Directional coupler Narda 4017C 10 e 3 dB attenuator 2 Weinschel 9 3 6 5 Phase Matrix Inc 585C amp 588C TEST SETUP 1 585C 588C COUNTER POWER METER og SYNTHESIZED SWEEPER EOT POWER SENSOR Figure 6 4 Band 2 CW Signal Range and Sensitivity Test Setup PROCEDURE 1 Connect equipment as shown in Figure 6 4 2 Set the 585C 588C counter to Band 2 and select resolution 3 3 Set the synthesized sweeper to 1 GHz 4 5 Apply the 1 GHz signal to the 585C 588C counter verify proper reading and record the Usin
120. to 100 Hz 4 Using the oscilloscope set the output signal level from the synthesizer to 0 063 V p p 20 dBm 5 Apply the 100 Hz signal to the counter verify proper reading and record the results 6 Repeat steps 3 4 and 5 at 1 kHz 10 kHz 100 kHz 1 MHz and 10 MHz TEST SETUP 2 PROCEDURE 1 Connect equipment as shown in Figure 6 2 585C 588C COUNTER POWER METER oe SYNTHESIZED SWEEPER Dr POWER SENSOR Figure 6 2 Band O Range and Sensitivity Test Setup 100 MHz to 250 MHz 2 Set the 585C 588C counter to Band 0 and select resolution 3 3 Set the synthesized sweeper to 100 MHz 4 Using the power meter set the output signal level from the synthesized sweeper to 20 dBm 5 Apply the 100 MHz signal to the 585C 588C counter verify proper reading and record the results 6 Repeat steps 3 4 and 5 at 200 MHz and 250 MHz 6 3 Phase Matrix Inc 585C amp 588C BAND 1 RANGE AND SENSITIVITY TEST DESCRIPTION This test verifies counter operation from 250 MHz to 1 GHz at 20 dBm for both CW and simulated pulsed signals The pulse generator is used to simulate a pulsed signal by applying a 50 ns TTL high with a 1 MHz repetition rate to the INHIBIT IN connector on the rear panel of the 585C 588C counter The power meter is used to set signal levels EQUIPMENT e Synthesized Sweeper Agilent 83640B e Power meter Agilent 437B e
121. ubleshooting 2011125 02 ACCO91 Remote Sensor 26 5 GHz 40 GHz WR 28 2010404 02 ACCO92 Remote Sensor 40 60 GHz WR 19 2030029 00 ACCO93 Remote Sensor 60 GHz 90 GHz WR 12 2030030 00 ACCO94 Remote Sensor 90 GHz 110 GHz WR 10 2030031 00 ACCO95 Remote Sensor 50 GHz 75 GHz WR 15 2030038 00 ACCO96 Remote Sensor 33 GHz 50 GHz WR 22 2030059 00 ACCO97 Remote Sensor 26 5 GHz 50 GHz 2 92 mm coax SMA compatible 2030122 00 ACCO98 Remote Sensor 110 GHz 170 GHz WR 6 2030121 00 ACC101 Chassis Slide kit includes Rack Mount kit with handles 2011123 01 ACC102 Chassis Slide kit includes Rack Mount kit without handles 2011124 01 ACC890 Frequency Extension Cable Kit 2000043 02 Remote Sensors ACCO91 through ACCO98 are used in conjunction with model 588C counters that have Option 5804 Extended Frequency Capability Band 3 installed 4 1 Phase Matrix Inc 585C amp 588C CARRYING CASE M585C ACCO10 The carrying case is shown in Figure 4 1 It is designed to protect the instrument when transporting it or using it in the field It is a molded case with die cut foam inserts that hold and protect the instrument from shock and vibration Figure 4 1 Carrying Case 4 2 4 ACCESSORIES RACK MOUNT KIT WITH HANDLES M585C ACCO21 This rack mount kit provides all the parts and hardware required to rack mount the instrument The rack mount brackets have built in handles Figure 4 2 shows one rack mount and the
122. uency offsets frequency range limits and averaging capabilities plus a variety of special functions including internal diagnostics calibration and test aids and sophisticated operational enhancements All front panel controls except the POWER switch and all background functions are externally programmable via the IEEE 488 1978 standard GPIB General Purpose Interface Bus port The instrument output status and all displayed information are accessible via the GPIB 1 1 Phase Matrix Inc 585C amp 588C OPERATING CONDITIONS This instrument is designed to be operated at temperatures not exceeding 0 to 50 C at relative humidity not to exceed 95 75 for temperatures greater than 25 C and 45 for temperatures greater than 40 C non condensing This instrument performs to specifications at altitudes not exceeding 10 000 ft 3050 m and tolerates vibration not exceeding 2 g It is fungus resistant The chassis is not designed to provide protection from mechanical shock or falling water particles and is intended for normal bench use in an environmentally uncontaminated area VENTILATION Air circulates through the vents in the rear panel of the counter These vents must not be obstructed or the temperature inside the counter may increase enough to reduce counter stability and shorten component life STORAGE Store the instrument in an environment that is protected from moisture dust and other contaminants Do not expos
123. ugh the keyboard the display responds normally This function shortens the measurement cycle time and provides security in systems used with classified frequencies The action taken with this function can be reversed by activating Special Function 66 ONE SHOT SPC INDICATOR ON SPECIAL FUNCTION 66 Enable Results Display This function reverses the action taken by Special Function 65 When this function is activated the display is immediately updated with the last measurement results ONE SHOT SPC INDICATOR OFF SPECIAL FUNCTION 67 Display Pulse Period Function as Pulse Repetition Frequency This function configures the counter to display the pulse period measurements as a frequency It has no effect on pulse width measurements After this function is turned on frequency measurements are not displayed on the front panel The pulse period is displayed to the maximum available resolution using the pulse parameter display as 3 52 3 OPERATION the 100 Hz 10 Hz and 1 Hz digits Since the PRF is derived mathematically from the period the resolution is a function of the period measurement resolution per the formula 1 1 Resolution Hz Period 10ns Period When requested by the GPIB bus controller to output a period measurement the counter outputs the period measurement instead of the PRE of the input signal If pulse period measurements are enabled Special Function 67 has a higher priority than Special Func
124. unciator is turned off when the counter is in internal timebase mode ONE SHOT SPC INDICATOR OFF SPECIAL FUNCTION 10 Internally Disconnect Pulse Generator from the Counter for Independent Operation This function disconnects the pulse generator from the counters inhibit input allowing the pulse generator to be used as a completely separate instrument When this function is activated the internal pulse generator has no affect on the operation of the counter but the pulse generator s rear panel connections are still active This function differs from the Pulse Generator ON OFF key in that the ON OFF key turns off the pulse generator and the pulse generator s rear panel connections ONE SHOT SPC INDICATOR ON SPECIAL FUNCTION 11 Internally Connect Pulse Generator to Counter This function reverses the action of Special Function 10 internally reconnecting the output of the pulse generator to the inhibit input of the counter By default the pulse generator output is connected to the inhibit input ONE SHOT SPC INDICATOR OFF SPECIAL FUNCTION 12 Trigger on Falling Edge This function causes the Internal Delaying Pulse Generator to trigger on the falling edge of the pulse generator trigger input STOP RESET SPC INDICATOR ON SPECIAL FUNCTION 13 Trigger on Rising Edge This function causes the Internal Delaying Pulse Generator to trigger on the rising edge of the pulse generator trigger input ONE
125. unction serves two purposes Its primary use is to store the present counter setup in the storage register specified When this function is activated the counter requests the user to enter the register number by displaying REG _ on the front panel The counter remains in this state until the user enters a number between 0 and 9 After the register number is entered the function stores the current counter setup in the register specified During this time REG N is displayed on the front panel where N is the register number entered This function also can be used to customize the default values used by the counter The default values determine the state of the instrument at turn on This is accomplished by setting the instrument up in the desired turn on condition and storing it in register 0 The information stored in register O is used to determine the power on state of the counter To clear the instrument back to the factory set default values select Special Function 72 and press the CLEAR DATA key ONE SHOT SPC INDICATOR OFF SPECIAL FUNCTION 73 Recall Counter Setup This function recalls the counter setup stored in the storage register specified When this function is activated the counter requests the user to enter the register number by displaying REG _ on the front panel The counter remains in this state until the user enters a number between 0 and 9 After the register number is entered the function proceeds to
126. ve keys are used for numerical data entry the digits 0 through 9 the decimal point and the change sign TERMINATOR KEYS Four keys GHz s MHz ms kHz us and Hz ns dB act as terminators for the input of frequency and time parameters The CLEAR DISPLAY and CLEAR DATA keys are also considered terminator keys 3 7 Phase Matrix Inc 585C amp 588C CLEAR DISPLAY AND CLEAR DATA KEYS These are also considered terminator keys At any point during a key sequence the user has the option either to e Press CLEAR DISPLAY to abort the sequence and return to normal operation without changing the value of the called parameter Press CLEAR DATA to abort the sequence and assign the default value to the called parameter PARAMETER CALL KEYS The operation of the counter is controlled by the values of the measurement parameters These parameters can be changed by the user through the keyboard or via GPIB Twelve of the keys called parameter call keys are also used to select the measurement parameters Five of these keys BAND which also calls subband PULSE GENERATOR MODE RES TEST and SPECIAL FUNC are used without terminators while the other eight CENTER FREQ FREQ LIMIT LOW FREQ LIMIT HIGH MIN PRE PULSE GENERATOR DELAY PULSE GENERATOR PERIOD PULSE GENERATOR WIDTH and A FREQ are used with the terminator keys The parameter call keys are dual function keys since they are also used for numeric data entry PARAMETER CALL
127. vel the maximum frequency range of Band 2 and the bandpass of the YIG filter located at the input to Band 2 Select Band 3 CENTER FREQ in the range of the subband currently selected The counter locks on signals 2 GHz from the entered center frequency The AF key is not active in Band 3 The counter does not reject signals outside this range If a signal more than 2 GHz from the entered center frequency is applied an erroneous reading may result The entered center frequency value is truncated to 10 MHz resolution The number can be entered in any fixed point format the units terminator determines the scale of the input number 3 12 3 OPERATION KEYBOARD EXAMPLES CENTER CLEAR Press Zz 0 to disable center frequency operation FREQ DATA CENTER Press 3 00 O O Ooselecta 14 8 GHz value FREQ CENTER MHz ms Press 0 2 a 0 to select a 2170 MHz 2 17 GHz value truncated FREQ to 10 MHz resolution GPIB EXAMPLE Enter Send 0 18 CENTERFREQ 14 8 GHZ NLend to select a center frequency of 14 8 GHz FREQ LIMIT LOW This key controls the low end of the frequency window that is searched for a signal in Band 2 Select frequency limit low in the range of 900 MHz to 20 5 GHz for Model 585C and in the range of 900 MHz to 26 7 GHz for Model 588C The value entered is truncated to 10 MHz resolution This function is only available in Band 2 The frequency limit low must always be less than the frequency limit high
128. veraging error ONE SHOT SPC INDICATOR ON SPECIAL FUNCTION 82 Frequency Multiplier This function allows the measured frequency to be multiplied by a fixed value prior to being displayed or returned over GPIB The multiplier value defaults to a value of 1 but any integer value between 01 and 99 can be used When this function is activated the counter displays the current multiply factor A new factor can then be entered When a factor is entered the SPC special annunciator is lit Entering 01 or CLEAR DATA clears the multiply function back to the default value ONE SHOT SPC INDICATOR ON 3 56 3 OPERATION SPECIAL FUNCTION 83 Frequency Offset This function allows the measured frequency to be offset by a fixed value prior to being displayed or returned over GPIB Frequency offset defaults to zero but may be any positive or negative value in the range of 99 999999 GHz to 99 999999 GHz The maximum resolution on frequency offset is 1 kHz When this function is activated the counter displays the current frequency offset When an offset is entered the SPC special annunciator is lit Pressing CLEAR DATA or entering 0 followed by any frequency terminator resets the Frequency Offset value back to the default value of zero ONE SHOT SPC INDICATOR ON SPECIAL FUNCTION 90 Display and or Alter GPIB Address When this function is activated the counter displays the current address of the GPIB interface I
129. wer levels so that the signal amplitude difference is 15 dB 4 Verify that the counter correctly measures the frequency of the higher power signal source 5 Repeat steps 2 3 and 4 at the following signal generator 1 and signal generator 2 frequencies 6 and 6 1 GHz 12 and 12 1 GHz 17 9 and 18 GHz 6 8 6 OPERATIONAL VERIFICATION TESTS BAND 3 SUBBAND 1 RANGE AND SENSITIVITY TEST 588C OPTION 5804 ONLY DESCRIPTION This test verifies counter operation from 26 5 GHz to 40 GHz at 20 dBm for both CW and simulated pulsed signals The pulse generator is used to simulate a pulsed signal by applying a 50 ns TTL high with a 1 MHz repetition rate to the INHIBIT IN connector on the rear panel of the counter The power meter is used to set signal levels EQUIPMENT e Synthesized Sweeper Agilent 83640B e Power meter Agilent 437B e Power sensor Agilent R8486A e Pulse generator Wavetek 801 e Oscilloscope Tektronix 2445 e Remote sensor Phase Matrix 091 e Cable kit Phase Matrix 890 INHIBIT SWEEP GENERATOR IN 585C 588C COUNTER ooa aoma aaa aa EEI POWER METER REMOTE 0 SENSOR POWER SENSOR PULSE GENERATOR Oo 0 0 OSCILLOSCOPE O o OUTPUT o Oo O O O O J le O o O o Figure 6 7 Band 3 Range and Sensitivity Test Setup Model 588C Option 5804 Only PROCEDURE 1
130. y is used to turn on the optional internal delaying pulse generator and to select the trigger source KEYBOARD EXAMPLES CLEAR to select default value 0 Press MODE DATA 0 Press Co to turn off the pulse generator MODE 0 Press to trigger from an external source MODE Press for continuous internal trigger Press O 0 C to trigger from input RF signal threshold MODE GPIB EXAMPLES Enter Send 0 18 GMODE 1 NLend to trigger from external source Enter Send 0 18 GMODE 2 NLend for continuous internal trigger Enter Send 0 18 GMODE 3 NLend to trigger from input RF signal threshold Enter Send 0 18 GMODE 0 NLend to turnoff pulse generator 3 10 3 OPERATION RES This key controls the frequency measurement resolution Select the desired resolution according to Table 3 4 Table 3 4 Frequency Measurement Resolution Selection Resolution Gate Time o 1 sec 100 ms 10 ms 1 ms default 100 us 100 kHz 1 MHz 10 MHz 100 MHz 1 GHz 7 2 3 4 5 6 7 8 9 KEYBOARD EXAMPLES RES CLEAR Press C 0 to select default resolution DATA RES Press C ex to select resolution 2 100 Hz RES Press 0 G to select resolution 9 1 GHz GPIB EXAMPLE Enter Send 0 18 RESOLUTION 2 NLend to select resolution 2 100 Hz TEST This key calls the 200 MHz self test It is functionally the same as a

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