Giga-tronics 8501A Operation & Maintenance Manual Download Page 5

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3.6 Status Code Decimal Values . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3-41

3.7 Summary of Bus Functions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3-43

3.7.1

Normal PPM Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3-43

3.7.2

PPM Stand Alone Plot Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3-43

3.8 GPIB Command Summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3-44

3.9 1018B Emulation Commands . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3-52

3.10 Data Formats . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3-52

•

Theory of Operation ________________________________________________

4.1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

4-1

4.2 System Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

4-1

4.2.1

Power Supply PC Assembly (A2) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

4-3

4.2.2

GPIB/CAL Control PC board (A3) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

4-4

4.2.3

CPU PC Assembly (A4). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

4-8

4.2.4

Digital Delay PC Assembly (A5) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

4-12

4.2.5

Analog PC Assembly (A6/A7) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

4-20

4.2.6

Front Panel Interface PC Assembly (A8) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

4-24

4.2.7

Calibrator PC Assembly (A12) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

4-27

•

Testing and Calibration _____________________________________________

5.1 General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

5-1

5.2 Performance Testing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

5-2

5.2.1

Equipment Required . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

5-2

5.2.2

Calibrator Return Loss Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

5-3

5.2.3

Calibrator Output Level Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

5-3

5.2.4

Instrument Plus Power Detector Linearity Test . . . . . . . . . . . . . . . . . . . . . . . . . . .

5-3

5.2.5

Power Linearity Test Setup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

5-4

5.2.6

Delay Accuracy Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

5-6

5.2.7

Analog Output Accuracy Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

5-7

5.2.8

Voltage Proportional to Frequency Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

5-7

5.2.9

Detector Return Loss Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

5-7

5.2.10

Plotter Output/IEEE-488 Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

5-7

5.3 Calibration Procedures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

5-8

5.3.1

Calibration Equipment Required . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

5-10

5.3.2

Preset Conditions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

5-10

5.3.3

A2 Regulator Board . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

5-11

5.3.4

Initialization. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

5-12

5.3.5

A8 Front Panel Interface Board . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

5-12

5.3.6

A6/A7 Analog Board . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

5-13

5.3.7

A3 GPIB/CAL Control Board . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

5-15

5.3.8

A4 CPU Board . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

5-15

5.3.9

A5 Digital Delay Board . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

5-16

5.3.10

External Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

5-19

5.3.11

Volume Adjust . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

5-20

Preface

Manual No. 20790, Rev C, November 1998

iii

Summary of Contents for 8501A

Page 1: ... Meters Certified Product ISO 9001 Certified Process Registra BSI Certification No FM 34226 Registered 04 June 1996 Giga tronics Incorporated 4650 Norris Canyon Road San Ramon California 94583 Telephone 925 328 4650 or 800 726 4442 Telefax 925 328 4700 Customer Service Telephone 800 444 2878 Telefax 925 328 4702 Web Site www gigatronics com ...

Page 2: ...fective during the warranty period This warranty DOES NOT cover damage resulting from improper use nor workmanship other than Giga tronics service There is no implied warranty of fitness for a particular purpose nor is Giga tronics liable for any consequential damages Specification and price change privileges are reserved by Giga tronics Model Numbers The Series 8500A includes two models The singl...

Page 3: ...age and Fuse Holder 2 4 2 3 Rear Panel Description 2 5 2 4 Front Panel Description 2 7 2 5 Operation 2 10 2 5 1 Power On Self Test POST 2 10 2 5 2 Warm Up Time and Temperature 2 10 2 6 Mode Selection 2 11 2 6 1 CW Mode 2 11 2 6 2 Peak Mode 2 11 2 6 3 Graph Mode 2 13 2 7 Self Calibration and Auto Zeroing 2 14 2 7 1 Self Calibration Procedure 2 14 2 7 2 Self Calibration Failures 2 15 2 7 3 Auto Zero...

Page 4: ...tures 2 45 2 18 1018B Peak Power Meter Emulation 2 47 2 18 1 General 2 47 2 18 2 Initiating the 1018B Emulation Mode 2 47 3 Remote Operation __________________________________________________ 3 1 Introduction 3 1 3 2 Remote Operating Modes 3 2 3 2 1 PPM IEEE Bus Functions 3 2 3 2 2 Front Panel Menus 3 3 3 2 3 Power On Condition 3 3 3 2 4 Remote and Local Lockout Functions 3 4 3 2 5 Output Modes 3 ...

Page 5: ..._________ 5 1 General 5 1 5 2 Performance Testing 5 2 5 2 1 Equipment Required 5 2 5 2 2 Calibrator Return Loss Test 5 3 5 2 3 Calibrator Output Level Test 5 3 5 2 4 Instrument Plus Power Detector Linearity Test 5 3 5 2 5 Power Linearity Test Setup 5 4 5 2 6 Delay Accuracy Test 5 6 5 2 7 Analog Output Accuracy Test 5 7 5 2 8 Voltage Proportional to Frequency Test 5 7 5 2 9 Detector Return Loss Tes...

Page 6: ...ASSY PRE WAVE PWR SUPPLY 7 10 21014 PCB ASSY GPIB CAL CONTROL 8500 7 13 21014 A00 PCB ASSY PRE WAVE GPIB 7 13 16878 PCB ASSY CPU 7 16 16878 A00 PCB ASSY PRE WAVE CPU 7 16 16685 P C ASSY DIGITAL DELAY 7 19 16685 A00 PCB ASSY PRE WAVE DIG DELAY 7 20 20741 ANALOG PCB ASSY 7 24 20741 A00 PCB ASSY PRE WAVE ANALOG 7 24 20195 PCB ASSY FR PNL INTERFACE 7 30 20195 A00 PCB ASSY PRE WAVE FRT PNL INT 7 30 205...

Page 7: ...Commands A 5 A 5 3 Pulse Sub Mode Commands A 5 A 5 4 Marker Sub Mode Commands A 5 A 6 Dual Channel Operation A 6 A 6 1 CW Mode Commands A 6 A 6 2 Peak Mode Commands A 6 A 6 3 Other Dual Channel Commands A 6 A 6 4 IEEE 1018B Emulation Commands A 6 B Menu and Memory Keys ____________________________________________ B 1 Introduction B 1 B 2 MENU Key Displays B 1 B 2 1 Normal 8500A Functions B 1 B 2 2...

Page 8: ...___________ E 1 Introduction E 1 E 2 Option 01 Rack Mount Kit E 1 E 3 Option 03 Rear Panel Connections E 2 1 Index _____________________________________________________________ Index Index 1 Series 8500A Peak Power Meters vi Manual No 20790 Rev C November 1998 ...

Page 9: ...ent System 2 42 Figure 4 1 Series 8500A System Block Diagram 4 2 Figure 4 2 GPIB Cal Control A3 Block Diagram 4 4 Figure 4 3 Voltage to Current Converter 4 6 Figure 4 4 CPU A4 Block Diagram 4 8 Figure 4 5 Digital Delay A5 Block Diagram 4 12 Figure 4 6 Timing Diagram Delay Board Functions 4 14 Figure 4 7 Analog PC A6 A7 Block Diagram 4 20 Figure 4 8 Front Panel Interface A8 Block Diagram 4 24 Figur...

Page 10: ...52 Table 4 1 A2 Test Points 4 3 Table 4 2 A3 Test Points 4 7 Table 4 3 A4 Test Points 4 11 Table 4 4 A5 Test Points 4 19 Table 4 5 A6 A7 Analog Test Points 4 23 Table 4 6 A8 Interface Assembly Test Points 4 26 Table 5 1 Required Test Equipment 5 2 Table 5 2 Required Calibration Test Equipment 5 10 Table 5 3 Multiples of 25 6 ns 5 18 Table 6 1 Required Test Equipment 6 2 Table 8 1 Series 8500A Diag...

Page 11: ...ned in this chapter Chapter 6 Maintenance This chapter contains procedures for maintenance and troubleshooting Chapter 7 Parts Lists This chapter lists all components and parts and their sources Chapter 8 Diagrams This chapter contains schematics and parts placement diagrams for all circuits Appendix A Summary of Commands A summary of the commands used to operate the Series 8500A front the front p...

Page 12: ...Series 8500A Peak Power Meters x Manual No 20790 Rev C November 1998 ...

Page 13: ...closed within a single heavy line and centered in the page This calls attention to a situation or an operating or maintenance procedure or practice which if not strictly corrected or observed could result in temporary or permanent damage to the equipment or loss of effectiveness Notes NOTE A NOTE highlights or amplifies an essential operating or maintenance procedure practice condition or statemen...

Page 14: ...ator YIG STEP ATTEN Step Attenuator RF Level Detector Coupler Voltage Controlled Oscillator Mixer Fixed Reference Oscillator Switch PIN Diode Leveler LVL Filter Step Recovery Diode Multiplier Digital Data Digital to Analog Converter DAC Phase Lock Loop Isolator Amplifier LOW PASS V R Series 8500A Peak Power Meters xii Manual No 20790 Rev C November 1998 ...

Page 15: ...ected replacement pages will be issued as Technical Publication Change Instructions and will be inserted at the front of the binder Remove the corresponding old pages insert the new pages and record the changes here Change Instruction Number Change Instruction Date Date Entered Comments Manual No 20790 Rev C November 1998 xiii ...

Page 16: ...Series 8500A Peak Power Meters xiv Manual No 20790 Rev C November 1998 ...

Page 17: ... has been configured for user specific application s supplemental pages will be inserted at the front of the manual binder Remove this page and replace it with the furnished Special Configuration supplemental page s Manual No 20790 Rev C November 1998 xv ...

Page 18: ...Series 8500A Peak Power Meters xvi Manual No 20790 Rev C November 1998 ...

Page 19: ...graphic information Modes of operation are indicated both by information on the display and by LED lights on the front panel Changes in mode or test parameters can be accomplished with the front panel keypad or for some operations the large spin knob on the front panel which can be used as an analog adjustment for certain parameters GPIB IEEE Bus setup and measurement operation are standard in the...

Page 20: ...No special tools are required to operate the Series 8500A Test equipment required for calibration or performance verification is described in Chapter 4 1 1 5 Cooling No cooling is required if the instrument is operated within its specified operating temperature range 0 to 50 C 1 1 6 Cleaning The front panel can be cleaned using a cloth dampened with a mild detergent wipe off the detergent residue ...

Page 21: ...l shipping container If this is not possible a strong carton or a wooden box should be used Wrap the instrument in heavy paper or plastic before placing it in the shipping container Completely fill the areas on all sides of the instrument with packaging material Take extra precautions to protect the front and rear panels Seal the package with strong tape or metal bands Mark the outside of the pack...

Page 22: ...s power detectors are as follows Calibrator Power Uncertainty at 0 dBm 1 5 0 065 dBm Linearity after Automatic Calibration 3 at stable temperature Temperature coefficient of linearity at ambien t 5 C CW and Peak typical 10 dBm negligible 0 to 50 C 10 dBm 0 5 deg C 15 to 50 C 1 0 deg C 0 to 15 C The instrument indicates if the 5 C calibration range is exceeded Uncertainty due to zeroing and noise C...

Page 23: ... outline of the detected pulse on the EL display Also provides readout of amplitude and timing information Fast Measurement Mode Available under GPIB control to provide fast data acquisition and output For an averaging number 1 typically will be between 70 and 120 measurements second Also can be used to provide fast data acquisition and throughput via a rear panel analog output for using an 8500A ...

Page 24: ...tus and self test diagnostics available through serial poll capability Direct Plot Output Outputs hardcopy pulse profile plots with time date and part identification to a GPIB plotter GPIB Address Selectable from front panel IEEE Interface Functions SH1 AH1 T6 L4 SR1 RL1 PP0 DC1 DT1 TE0 LE0 General Specifications Stored Setups Saves settings at power down and has 10 additional setups in non volati...

Page 25: ...m 5 22 x 16 76 x 14 00 in Rack Mount 132 6 x 482 6 x 355 6 mm 5 22 x 19 00 x 14 00 in Conforms to EIA RS 310 Standard for a 19 inch rack Weight Model 8501A 12 kg 26 lbs Model 8502A 13 kg 28 lbs Depending upon requirements the following software versions and enhancements apply See Table 1 1 Table 1 1 8500A Functions Related to Software Versions S W Version Sound Works Fast Analog S Mode FAA Menu Wr...

Page 26: ...0000 nanoseconds Delay Window A B 10 0000 microseconds Reference Power Level A B 0 dBm Reference Delay A B 0 0000 microseconds Cal Factor 0 dB Mode Channel A CW power dBm Trigger Mode Channel A Internal Pulse Width Start 50 Pulse Width End 50 Rise Time Start 10 Rise Time End 90 Fall Time Start 90 Fall Time End 10 Marker 1 2 5 A and B Marker 2 17 8 A and B Marker 3 46 9 A and B Marker 4 90 A and B ...

Page 27: ...ed when they are performed A double beep means that the function failed to complete The discussion of these functions later in this chapter will detail what problems might cause the function to fail There is a volume control on the rear panel of the instrument It adjusts the audio tones to a comfortable level or the audio can be turned off if desired NOTE In the remainder of this chapter except wh...

Page 28: ...ent carrying conductor is black and its return is white The green wire of the power cord is for connection to earth ground The instrument will be properly grounded if the plug is connected to a properly installed three prong receptacle If a three prong to two prong adapter is used be sure that the pigtail lead of the adapter is earth grounded WARNING The safety ground is connected directly to the ...

Page 29: ... line voltage and fuse refer to Figure 2 2 and proceed as follows 1 Open the cover door rotate the fuse pull to the left and remove the fuse 2 Select the operating voltage by orienting the PC board so that the correct voltage label is on the top left side 3 Push the board firmly back into the module slot 4 Rotate the fuse pull back into the normal position and reinsert the fuse into the holder Use...

Page 30: ...setting Use the same tool to remove the voltage selector a small barrel shaped component marked with voltage settings Rotate the selector so that the desired voltage faces outward and place the selector back in its slot Close the housing cover the appropriate voltage should be visible through the window see Figure 2 3 To replace the fuse With the housing cover open pull out the small drawer on the...

Page 31: ...ted signals entering the PPM The Model 8502A has a monitor input for Channel A and Channel B 3 Analog Output This connector outputs 100 mV dB signal to interface the PPM with the Giga tronics Model 8003 Precision Scalar Analyzer for making swept peak power measurements see Measuring Peak Power Under Swept Conditions in Section 2 14 The Model 8502A has an analog input for Channel A and Channel B CA...

Page 32: ...ation to the PPM for detector frequency response correction when required 7 TRIG Input TTL This connection interfaces a TTL signal source to provide an external trigger when this mode of operation is selected 8 SYNC Output This output connection provides access to the sample pulse for synchronizing the PPM to an external counter 9 RF Blanking Output TTL This output interfaces a blanking TTL signal...

Page 33: ...nd F2 down directional keys are used in the Graph Mode to move the cursor icon up and down to select any pulse or cursor parameters that are to be changed The F3 backspace key is for correcting entered text or numbers A secondary function of these keys is to select menu functions as the various menus are displayed 5 Ready New Data Indicators These LEDs flash whenever the system is receiving a trig...

Page 34: ...s can display sub menus that pertain to the particular function of that key However the MENU key will cause the routine to step through each of the main menus each time it is pressed As an example if it were pressed three times then Menu 3 would be displayed Appendix B contains a description of each menu that will be accessed at each keystroke of the MENU key Wherever possible commands or user sel...

Page 35: ...he graphic display of the detected pulse and easy determination of pulse timing factors In addition to the readout display indications the selected mode is identified by which LED in the center of the PEAK GRAPH and CW keys is lit If the Model 8502A is being used for dual channel operation and all of the mode LED s are out then it is in the Ratio Mode see the Power Ratio Measurement Procedures in ...

Page 36: ...or connection on the front panel to a 50 ohm termination or to a signal source before initiating the POST function 3 Turn on the power by pressing the power switch on the front panel The PPM will perform a self test to verify that it is operating properly The self test is not identical to the one performed by selecting MENU 11 F2 or by sending the SELT command over the GPIB The POST will not repor...

Page 37: ... compensating for the frequency response of the detector could result in an error in the power measurement reading CW Averaging This setting selects how many samples of the signal being measured will be taken and averaged to reduce noise effects at low power levels To adjust the averaging number press Menu 2 F1 A number between 1 and 999 averages must then be entered The number of averages present...

Page 38: ...ew Data light will not be lit and the Ready light will not be on If a Model 8502A is being used the routine will ask whether internal triggering is to be driven by inputs from channel A or channel B Press the appropriate Detector Select A or B key To select the Internal Trigger Mode and set the level press 8501A MENU 1 F1 nn nn UNITS 8502A MENU 1 F1 A or B nn nn UNITS nn nn selected trigger level ...

Page 39: ...r inspection of the pulse profile and the frequency is not displayed to allow room on the display for other important pulse profile parameters see Figure 2 7 for a typical Graph Mode display All operating parameters such as trigger mode frequency and cursor delay are maintained in both the Peak and Graph Modes The Graph Mode can place the cursor at a specific point on the pulse and then the PEAK k...

Page 40: ... been a change in the temperature of the detector of more than 5 C since it was last calibrated the difference will be shown 2 7 1 Self Calibration Procedure Connect the channel A detector to the 1 GHz Calibrator output Press MENU F3 to call up the Cal or Zero Detectors menu The menu offers the following choices F1 to Calibrate the Detectors F2 to Auto Zero the Detectors F3 to Return to Data Displ...

Page 41: ...t connecting the detector to the calibrator This can be accomplished and then the Self Cal procedure can be repeated See Input Output Calibration Failure descriptions in Section 6 3 2 for the procedure to follow if the PPM fails the Self Cal 2 7 3 Auto Zero Function To initiate the Auto Zero function turn off the RF power to the detector to be zeroed and then press MENU F3 to get to the Self Cal A...

Page 42: ... is stored in a PROM inside the detector housing thus eliminating the need for you to refer to a frequency correction chart and then make manual adjustments to the system for each discrete frequency point The PROM data is used by the PPM to correct for all of the detector s amplitude variations across its entire frequency range When the system is first turned on the PROM data stored in the detecto...

Page 43: ... response correction factors the PPM provides a means to manually correct for any detector frequency response variations in dB An example of when this could be necessary is if the data stored in the detector s PROM might be out of date To activate the Cal Factor feature of the system press MENU 3 F3 F3 If the dual channel 8502A is being used you will be asked to select a channel Select A or B as a...

Page 44: ...r down into the range of the PPM and use the attenuator or coupler output as the measurement point for the detector attachment If in doubt use a 10 dB attenuator This should prevent a mild overload that might result only in detector degradation rather than burn out 4 Be sure the RF power of the source is completely OFF 5 Connect the detector to the power source being measured 6 Auto Zero the detec...

Page 45: ...trigger level Complex pulse shapes such as double pulses cannot always be successfully autoscaled Methods for these situations will be covered later After the pulse to be measured has been successfully autoscaled it is only necessary to press PEAK and the system will read the power at the center point of the pulse The readout will be displayed in large alphanumeric characters For the following pro...

Page 46: ...he many varieties of pulse widths pulse shapes and duty cycles that might be encountered it is not always possible for the PPM to autoscale If the failure to autoscale is the result of a pulse being present at the 75 µs default setting the setting can be changed by accessing Menu 9 making the change and then repeating the autoscaling procedure detailed in this section It is necessary to keep the i...

Page 47: ...l 8501A or only channel A of the dual channel 8502A is being used The procedures for channel B of the 8502A are almost the same as those for channel A However if it is desired to use the Internal Trigger function with channel B this must be selected by using the MENU key as described under Internal Triggering in Section 2 6 2 1 Allow the PPM to warm up for 30 minutes then conduct the Self Calibrat...

Page 48: ... function Using the Graph Mode makes searching much easier 5 As already mentioned the cursor symbol next to the DLY indication on the display means that the spin knob is active and if turned will alter the value of the Cursor Delay CSR DLY To locate the highest power point on the pulse it is best to start at the rising edge of the pulse and move the cursor gradually up in time until the power read...

Page 49: ...PM will not trigger the New Data light will be out While the PPM is Autoscaling the display will indicate Autoscaling in Progress When autoscaling is complete the pulse will be centered in the graphics area of the display and the vertical cursor will be positioned at the center of the pulse profile If the display does not indicate a pulse centered in the graphics area of the display with the verti...

Page 50: ...LY means that the Cursor Delay is adjustable by using either the spin knob or the keypad The cursor is placed by using either the up or down arrow key STRT DLY This is the Start Delay of the graphics display area on the readout It signifies the amount of time between the occurrence of the trigger and when readings begin at the left side of the graphics display If the default value is still set the...

Page 51: ...sub modes See the descriptions of marker sub mode in Section 2 8 10 and cursor sub mode in Section 2 8 8 for a more detailed explanation There are two ways to set the Reference Power Level on the PPM The first way is to move the cursor to the REF PWR next to last line of the displayed parameters use either the up or down arrow key Then enter the desired Reference Power level and press the appropri...

Page 52: ...MARKER Pulse Rise Time Width and Fall Time The PPM displays the time between three pairs of start and stop power percentages The default values for start and stop percentages are Measurement Start Stop Rise time 10 rising edge 90 rising edge Fall time 90 falling edge 10 falling edge Pulse Width 50 rising edge 50 falling edge These parameters can be set or changed as follows 1 Press PULSE CURSOR MA...

Page 53: ... 81 rising edge Fall time 81 falling edge 1 falling edge Width 25 rising edge 25 falling edge The pulse rise time fall time and width are displayed with the appropriate time units A display consisting of all dashes indicates that a the instrument failed to find the peak power point or b the instrument failed to find a start percentage point or c the instrument failed to find a stop percentage poin...

Page 54: ...marker percentages by 1 10 This is particularly useful to set marker percentages to resolutions better than 0 1 of the peak power The default settings for marker sub mode are set for the measurement of linearity on the leading edge of a navigation pulse In this particular measurement the time between the 5 13 3 21 7 and 30 points on the voltage waveform are compared Equal times indicate a linear v...

Page 55: ...red Marker 1 percentage through the numeric keypad using any Units key to terminate the entry 4 Repeat steps 2 and 3 at the MKR 3 2 line to change the Marker 2 percentage and the MKR 4 3 line to change the Marker 3 percentage To change the Marker 4 percentage move the cursor to the blank line just below the MKR 4 3 line Operation Manual No 20790 Rev C November 1998 2 29 ...

Page 56: ...s part of a GPIB system it is up to the user to be sure that no front panel plot function is initiated to ensure correct operation of the system The following steps are required to generate an X Y hardcopy plot 1 Connect a GPIB cable from the PPM s rear panel GPIB connection to the plotter s GPIB input connection 2 Choose a GPIB address for the plotter and set its address switches according to the...

Page 57: ...3 F2 for a transparency plot 9 If there is any GPIB bus error an alarm will sound This indicates that when the PPM checked the IEEE Bus it was unable to activate the plotter Some possible causes for this might be an incorrect address setting the plotter not set up correctly or the plotter is turned off or out of paper If this situation occurs press F2 to return the PPM to its previous mode of oper...

Page 58: ...ctor to the Calibrator when prompted 4 Connect the detectors to the device s or system to be tested 5 The PPM will now be displaying the CW power for channel A To display the CW power for both channels press B 6 Select the frequency of operation or cal factor as necessary for detector response correction by pressing FREQ 7 Enter any required display offsets 8 To return to single channel operation ...

Page 59: ...he Cursor on the leading edge of the displayed Measurement Port 1 pulse because the minimum Cursor Delay of 0 ns would be the trigger point leading edge of the Measurement Port 2 pulse Therefore this situation would require that either Measurement Port 1 be used to generate an Internal Trigger or that an External Trigger be used Doing this would ensure that readings could be taken at any desired p...

Page 60: ...itioned 9 Select the Peak Mode of operation by pressing PEAK 10 Select Dual Channel operation by pressing Detector Select A Make sure that the LEDs in the center of the Detector Select A and B keys are lit This signifies that the PPM is in the Dual Channel Mode The display should be similar to the following A 0 65 dBm 30 600 ns B 4 65 dBm 39 700 ns FREQ 1 00 GHz PEAK 2 10 4 Peak CW Measurements If...

Page 61: ...an also be expressed as a linear reading such as 19654 EXP 4 by pressing dB mW The display indicates that two CW signals are being ratio ed by displaying CW CW in the lower right hand corner of the display Remember that the frequency of operation or Cal Factor must be entered using the FREQ key and any desired Offsets should also be included These two functions are described in Sections 2 8 3 and ...

Page 62: ...y Ratio ing Peak to CW Signals This function is very useful in many applications such as traveling wave tube TWT testing that require the measurement of gain under pulsed conditions This could be a problem when the TWT has a CW input and a pulsed output The PPM easily performs this type of measurement using the following procedure 1 Make a single channel Peak measurement at the port of the device ...

Page 63: ...too low for the PPM to take an accurate measurement The default value for the MIN Power warning point is 45 0 dBm You can set this anywhere between 15 and 50 dBm To change the MAX and MIN power limits press MENU 7 F1 mm mm dBm nn nn dBm where mm mm is the maximum power limit and nn nn is the minimum power limit 2 12 High Power Measurement Procedures The procedure for making absolute CW or Peak pow...

Page 64: ...or be placed on the pulse This can be done by using the PPM s Autoscale feature which is activated in the Graph Mode by pressing AUTOSCALE If this method is not possible try using the Internal Trigger with the level set at 20 dBm Then set the Cursor at 0 0000 ns and increase the Cursor Delay gradually until the CRS PWR is at its maximum Figure 2 14 Detector to a High Power Coupler Setup Figure 2 1...

Page 65: ... 12 To obtain the absolute power output of the RF source being measured use the PPM s Offset feature to offset the displayed values by the combined attenuation values of the coupler and or attenuators being used in series with the detectors Most couplers and attenuators have attenuation versus frequency response curves supplied that can be used for exact entry of the required offset To enter the O...

Page 66: ...pulse measurement using the Internal Trigger it must first be decided how long after the trigger has occurred that the measurement should be taken For example in the single pulse shown in Figure 2 16 the PPM trigger level is set to 10 dBm If the Cursor Delay were set to 0 0000 ns then the power measurement would be taken at the trigger point In this case this is not on the top of the pulse being m...

Page 67: ...5 Set the Peak Pulse Averaging number to 1 6 Connect the detector to the RF source to be measured 7 When a pulse of sufficient amplitude to cause a trigger enters the detector input the PPM in this case will take a reading 5 µs later The Peak power being measured at the time of the Cursor Delay will then be frozen on the display until the next pulse or trigger occurs 2 13 4 Single Pulse Measuremen...

Page 68: ...cking errors on the CRT in grease pencil for visual correction The PPM is normally used in the Peak Mode for this type of testing Most PPM settings would be the same as when measuring a single frequency pulsed signal In order to use the Swept Pulse system with any degree of accuracy the pulse repetition rate must be considerably faster than the speed at which the RF sweep takes place This is deter...

Page 69: ...calculations see Section 2 8 2 more information on the interfacing of external frequency signals To make swept frequency measurements under pulsed conditions equipment should be set up similar to Figure 2 17 The measurement routine is initiated by pressing MENU 10 F1 During the time that the fast analog output mode is active the display window will indicate FAST ANALOG OUTPUT MEASUREMENT MODE Pres...

Page 70: ...sed A beep will then sound and the PPM will return to its previous display mode If some type of failure is detected by the PPM s microprocessor during the Self Test the display will indicate SELF TEST FAILED PRESS CLEAR ERROR NUMBER S 11 8 etc Table 2 1 gives a listing of the error numbers and their associated meanings Error Cause 01 5 2 V Supply 02 Memory Bad 03 Excessive A Channel Offset 04 A Ch...

Page 71: ...ll be presented to select Last Setup at Turn Off If it is desired to use the PPM in the same manner as when it was last used this feature of the Non Volatile Memory is very convenient Other features of the Non Volatile Memory will be discussed next 2 17 1 Memory Features To access the Memory features of the PPM press MEM There are three levels of menus accessible by sequentially pressing the MEM k...

Page 72: ...y The PPM will display the instrument status readout of the Memory screen by screen To scroll to the next screen display press F1 for More To exit and return to data display press F3 Initializing Setups This feature of the PPM allows the initializing of the current setup a numbered memory setup or all but the current setup see Section 1 3 Initializing resets the selected setup s parameters to the ...

Page 73: ...se the 1018B software with the PPM in the 1018B Emulation Mode the software must be written so that the talk and listen addresses of the PPM are both the same For further information see Section 3 5 2 18 2 Initiating the 1018B Emulation Mode To initiate the 1018B Emulation Mode press MENU 8 F2 Thereafter MENU 8 selects settings relating to the way in which the PPM will emulate the 1018B See the Me...

Page 74: ...Series 8500A Peak Power Meters 2 48 Manual No 20790 Rev C November 1998 ...

Page 75: ... Simple Sample Programs Command Descriptions by Function Command Syntax Sample Programs Service Request SRQ Functions Error Conditions Giga tronics Model 1018B Emulation Limitations Explicit and Implied 1018B Emulation Status Code Values Normal Command Errors Operation Errors Task Completion Codes Normal and Abnormal Critical Errors Summary of Bus Functions Implemented on the Model 8501A 8502A Pow...

Page 76: ...cale will result in a service request and the error condition of 60 Completion will be signaled by the SRQ reporting either success or failure If the command is AUTO and Marker Placement it is necessary to wait for AUTO success or failure and then Marker Placement success or failure before expecting any time measurement output data from the PPM The controller should time out if the PPM does not co...

Page 77: ...ses entered are stored in non volatile memory and need to be entered only when they change but not when power is turned off and on again 3 Emulate 1018B see Section 3 5 The instrument will always power on in the normal PPM mode and not the 1018B emulation mode 4 Plot see Plot Output Mode in Section 3 2 5 5 Stop current plotting activity see Stand Alone Plot Output Mode in Section 3 2 5 3 2 3 Power...

Page 78: ...ext time it is listen addressed with REN asserted Besides the return to local escape sequence and the GTL universal command the PPM will also exit the Remote state when the REN line goes low After the PPM has entered the Remote state a Local Lockout command can be sent to disable the use of the front panel This feature is intended to prevent accidental changes in front panel settings or interrupti...

Page 79: ...704 is the HP instruction that the output is to go via the GPIB interface The 04 in 704 is the Listen Talk address of the PPM The Listen Talk address must be set with the MENU key on the PPM s front panel see the Menu 6 description in Appendix B In the Update Trigger Reset Mode the PPM will not send any data until it receives a trigger reset When the trigger reset is received through the GPIB the ...

Page 80: ...he same as using the universal GET command except that after Step 1 when the PPM has been listen addressed the command string UPDN should be sent The power measurement data output format is discussed in Section 3 2 7 Sample Program 10 PRINT CHR 12 20 THIS PROGRAM USES THE 30 UPDATE TRIGGER RESET MODE 40 OF THE PPM TO COLLECT 50 POWER MEASUREMENT DATA 60 UPDN RESETS THE PPM IT 65 IS THEN READY OR A...

Page 81: ...nitiate a trigger reset and be ready to record the next measurement If the instrument is in the Peak or Graph Modes the measurement power reading at the cursor location will be taken the next time the instrument is triggered Triggering can be either internal or external depending on how the PPM has been configured Upon continuous triggering measurement data points separated by commas will be sent ...

Page 82: ...while it is in the Graph Mode the PPM will plot a graph of the selected Cursor Pulse or Marker sub mode See Figures 2 8 2 10 and 2 9 for typical plots of Graph sub mode pulse profiles The following commands are used when it is desired to have any serial or code numbers appear on a hardcopy plot PLPNxxxxxx x string of 12 or less characters Plot part number ASCII string PLCNxxxxxx x string of 12 or ...

Page 83: ... INITIATE THE PLOT ROUTINE 310 320 OUTPUT 704 PLOT 330 PUTS PPM IN PLOT OUTPUT MODE 340 350 SEND 7 UNL 360 SEND 7 LISTEN 6 370 LISTEN ADDRESSES THE PLOTTER 380 SEND 7 TALK 4 390 TALK ADDRESSES THE PPM 400 410 SEND 7 DATA 420 RELEASES ATN LINE ALLOWING 430 PLOTTING TO BEGIN 440 450 WAIT 180 460 WAIT UNTIL PLOTTING HAS 470 FINISHED BEFORE UNTALKING 480 THE PPM PLOT TAKES ABOUT 490 3 MINUTES 500 510 ...

Page 84: ...during a serial poll in which bit 7 is high when service is being requested see Service Requests in Section 3 4 The character string sent out to represent the status value will consist of a four character head STAT followed by three digits This output mode can only be active when SRQ is disabled Service request status bytes are not buffered when SRQ is disabled so only the most recent status value...

Page 85: ...is the only controller capable device on the bus and will act as the system controller Depending on the system configuration these checks made by the instrument may not be perfect NOTE For proper system operation no active controller can be on the bus when the front panel function is initiated While the PPM is checking the state of the bus it will display the message Checking GPIB Interface and th...

Page 86: ...t the end of the string without effecting the PPM s interpretation of the command string Commands can be in upper or lower case format An argument consists of a digit string which can optionally be preceded by a positive or negative sign If no sign is present the number is assumed to be positive The digit string can also contain a decimal point if desired The dimension of each argument is fixed th...

Page 87: ... four digits and a decimal point These are followed by an E then a polarity sign and two more digits The digits following the E are always multiples of three This makes it easier to determine if the data is being given in terms of microwatts milliwatts nanowatts etc Each measurement taken in the Update Data Trigger Reset mode will be terminated by a carriage return followed by a line feed sent wit...

Page 88: ...rizes the detector over a 50 dB power range for the most accurate power measurements The temperature of the detectors can be monitored to verify whether the detector should be calibrated The PPM makes use of a PROM with stored frequency response data contained in the RF detector assembly The instrument uses the stored data to automatically compensate for detector frequency response variations A re...

Page 89: ...rned Status value interpreted See Section 3 4 for SRQ features and Section 3 6 for applicable Status Code values CALA Calibrate channel A detector CALB Calibrate channel B detector Temperature Difference Since Last Calibration Commands DTMP Output the Difference in the temperature of each detector since calibration This command causes the temperature to be read from each detector or whatever detec...

Page 90: ...power level being measured is low and may be inaccurate The PPM can be enabled to generate an SRQ for under range conditions The point at which the PPM sends an SRQ is determined by the MINP command Data output during an under range condition is as follows Log Mode 99 99dBm Linear Mode 0 000E 99 Over range conditions always generate an SRQ if SRQ is enabled but normal data is still output It shoul...

Page 91: ... means In addition to automatic frequency correction it may be desired in some applications to use manual corrections based on specific measurements rather than the factory supplied data in the detector s PROM This is known as Cal Factor Some power meters on the market use the term efficiency but it is basically the same thing Cal Factor is expressed in dB and is the amount of power that must be a...

Page 92: ...0V GHz The most common values for this coefficient are 0 5 and 1 00V GHz Consult the instruction manual for the sweeper being used to obtain the correct coefficient B The minimum coefficient voltage corresponding to the minimum frequency of the sweeper Min Value 0 0V Max Value 19 000V Example If the sweeper s V GHz is 0 5V and the minimum start frequency is 2 0 GHz then this value would be 2 x 0 5...

Page 93: ...using FPVO and operating in the UPDC mode there will be a stack build up Old frequency and power data will be output in applications such as swept power measurements Sample Program 10 PPM EXTERNAL FREQUENCY PLUS 20 FREQUENCY OUTPUT MODE 30 OUTPUT 704 UPDT SELECT OUTPUT 40 MODE SELECT EXTERNAL FREQ 50 MODE AND COLLECT A DATA 60 POINT AND ITS FREQUENCY 70 G 5 VOLTS GHZ 80 V 1 V GHZ START FREQUENCY 9...

Page 94: ... USE 20 THE PPM CAL FACTOR FEATURE 30 40 CHANNEL A CAL FACTOR 50 COMMAND FOR 2 56 dB 60 OUTPUT 704 DCFA 2 56 70 80 CHANNEL B CAL FACTOR 90 COMMAND FOR 2 56 dB 100 OUTPUT 704 DCFB 2 56 110 120 END Offsetting Measured Data dB Offset Commands Channel A offset OFFAsnn nn s polarity nn nn dB value Min Value 40 00 dB Max Value 90 00 dB Channel B offset OFFBsnn nn s polarity nn nn dB value Min Value 40 0...

Page 95: ...Typical Program Line OUTPUT 704 WATT Select Measurement Mode Commands Except Graph and Ratio Modes CW Power Commands CWPA CW power channel A CWPB CW power channel B CWAB CW power channels A B A CW related command is AVCWnnn Select number of averages n for CW power measurements Higher numbers reduce noise effects and stabilize readings at low power levels n number between 1 and 999 Peak Power Comma...

Page 96: ...ence delay Arbitrary timing point to which other timing measurements are related n microseconds Min Value 0 µs Max Value 213999 97 µs CDLAsnnnnnn nn Set channel A cursor delay Sets timing position of the Cursor on the graphic display The Cursor is the vertical line located where the power reading CSR PWR is being taken Timing is related to the Reference Delay REF DLY n microseconds s polarity CDLB...

Page 97: ...ints would be DBMB instead of DBMA B When using the FPVO Rear Panel Frequency Input and Frequency Output method for detector frequency response correction the PPM s Linear Mode data output string for Channel A will be in the following form PWRAmm mmEsee FRQAfff ffE 09 PWRAnn nnEsee FRQAggg ggE 09 m first power data point f first frequency data point n second power data point g second frequency dat...

Page 98: ...e results on an automatic basis will be covered first This should reduce programming time by allowing the PPM s internal software to take care of various tasks such as rise time Obviously there are some types of pulses that cannot easily be measured automatically If it is required that algorithms be devised to extract pulse information the PPM should serve this purpose well by using the manual com...

Page 99: ... B selected d seconds e exponent The following commands set new values for the pulse parameters PUFSddd Set Pulse Fall Time Start Where d expressed in 0 1 units Allowable range is 1 to 999 0 1 to 99 9 PUFEddd Set Pulse Fall Time End Where d expressed in 0 1 units Allowable range is 1 to 999 0 1 to 99 9 PURSddd Set Pulse Rise Time Start Where d expressed in 0 1 units Allowable range is 1 to 999 0 1...

Page 100: ...n the Peak Mode However to make single pulse measurements you should know where the Cursor Delay should be set to make the measurement The commands in the Automatic Timing description in this section allow for easy measurement of the most commonly desired pulse parameters These include rise time fall time pulse width and combinations thereof The automatic measurements are determined by conventions...

Page 101: ...tudes are expanded to show more resolution s polarity nn nn dBm value Min Value 60 00 dBm Max Value 110 00 dBm Sample Program 10 P 0 CHANNEL A REFERENCE 20 POWER IN DBM 30 40 CHANGE CHANNEL A REFERENCE 50 POWER 60 OUTPUT 704 PRFA P 70 80 CHANGE CHANNEL B REFERENCE 90 POWER 100 OUTPUT 704 PRFB P 110 END NOTE RPOA and RPOB are operable only in the Graph Mode RPOA Output Current Reference Power for C...

Page 102: ...all time of the displayed pulse profile Fall time is from the 90 power point to the 10 power point on the falling edge of the pulse Output format for channel A is FALAnn nnnEsnn n seconds Esnn exponent Output format for channel B is FALBnn nnnEsnn PLWD Measure and output pulse width of the displayed pulse profile Pulse width is the time between the 50 power points on the rising and falling edges o...

Page 103: ... written for the 8501A 8502A meters The commands are retained in this manual for users with programs written for older 8500 instruments and who want to cross reference for the new 8500A instruments If old code has been written for an 8500 instrument and includes some of these commands the program will still operate with the 8500A but the commands will have no function The term No Op is used in the...

Page 104: ...ence powers and positions on the pulse profile and output their respective delays For channel A the output is MRKA1 snnn nnEsnn 2 snnn nnEsnn 3 snnn nn Esnn 4 snnn nnEsnn If channel B is in use the output is MRKB1 snnn nnEsnn 2 snnn nnEsnn 3 snnn nn Esnn 4 snnn nnEsnn The numbers 1 2 3 4 represent the marker numbers to be used The snn nnEsnn following each marker number is the delay time of that m...

Page 105: ...st of a gaussian shaped TACAN radar pulse that is slightly distorted You might want to make timing measurements with respect to the highest point on the pulse You might also want to know the timing of the 3 dB point of the pulse with respect to its peak When in doubt the Reference Delay should be set to 0 0000 nanoseconds Besides the Reference Delay and Cursor Delay the Start Delay and Window Dela...

Page 106: ...exponent SDLAsnnnnnn nn Start Delay for Channel A Sets timing position of left side of graphic display Timing is relative to the Reference Delay n microseconds s polarity Min Value 0 Reference Delay Max Value 213999 97 µs Window Delay Reference Delay SDLBsnnnnnn nn Start Delay for Channel B Sets timing position of left hand side of graphic display Timing is relative to the Reference Delay n micros...

Page 107: ...mand to fetch 118 data points along the pulse profile as well as any pertinent timing settings relating to the profile being examined DUMG Output All 118 Power Measurement Points of the Displayed Pulse Profile If Channel A is in use the PPM will output RDLAnn nnnEsnn SDLAnn nnnEsnn WDLAnn nnnEsnn PWRAnnn nnEsnn nnn nnEsnn repeats until all 118 data points have been output Esnn exponent The PPM out...

Page 108: ... are summarized in the following description PLCNaaaaaaaaaaaa Set Code Number for plot to ASCII string represented by up to 12 characters a PLPNbbbbbbbbbbbb Set Part Number for plot to ASCII string represented by up to 12 characters b PLOT Plot pulse profile currently displayed Marker information will be plotted if the PPM is in the marker sub mode Pulse information will be plotted if the PPM is i...

Page 109: ...utoscaling to 200 microseconds sets the averaging for autoscaling to 25 averages instructs the PPM to autoscale Lines 30 40 Set the code numbers for the plot to abcdefg sets the part number for the plot to qwerty instructs the PPM to find the rise and fall times of the displayed pulse instructs the PPM to place the markers as defined and to plot the displayed pulse profile The remaining lines in t...

Page 110: ... the controller reads the status byte through the GPIB via a serial poll the 7th bit will always be high if the PPM was requesting service Thus the actual value of the PPM status will be the byte that is read minus the 7th bit When the PPM s status is read by the STAT command when SRQ is disabled the byte that is sent out always has the 7th bit as zero see 3 2 5 Any status condition that has the s...

Page 111: ...ower was being measured If a serious over range condition occurred detector damage may have resulted If an under range condition occurs when the PPM is operating under bus control and it is not collecting data to be sent over the bus in the Update Data Trigger Reset or Update Data Continuously Modes then the instrument will not signal the controller with a service request that the under range cond...

Page 112: ...Continuously The default state upon entering the 1018B Emulation Mode is Update Trigger Reset After that the output mode can be changed from the front panel see the Front Panel Menus description Section 3 2 2 The two modes work in exactly the same way as with the PPM except that the data output format is different Output Format The data will always be output in a string consisting of a polarity si...

Page 113: ... of these options are directly controllable over the GPIB in normal PPM usage Disable Enable SRQ This allows the SRQ capability to be enabled or disabled with the same effects as the SRQE and SRQD PPM GPIB commands Whatever option is offered enable or disable will be the opposite of the current state Update on Trigger Reset Continuous This sets the Output Mode The choice offered will be the opposi...

Page 114: ...ter PPM 1 The PPM has no ability to be directly triggered with a GET command It can only reset its trigger to capture the next pulse that will trigger the instrument 2 The PPM has no talk only mode 3 Whereas the 1018B allowed completely independent talk and listen addresses the PPM must have the same talk and listen addresses The addresses are set as one via the front panel 4 The 1018B locks out t...

Page 115: ...mplemented no commands processed 40 GET sent when not in REMOTE 41 GET or UPDN command sent when not in the Update Data Trigger Reset Output Mode If UPDN command no command s processed 43 Not in Graph Mode or Marker sub mode must be in Graph Mode for AUTO Autoscale Graph or PLOT commands to function Must be in Marker sub mode for marker commands to function No command s processed 44 Autoscaling PL...

Page 116: ...t failed See Self Test Failure Indications in Section 3 6 for a description and possible causes pertaining to Error Numbers 01 through 11 These will be decimal values 170 through 180 respectively 184 New software detected Must recalibrate both detectors 185 Serial numbers don t match Must recalibrate A and B detectors 186 Serial number doesn t match Must recalibrate detector A 187 Serial number do...

Page 117: ...e capability with local lockout capability PP0 No parallel poll capability DC1 Complete device clear capability responds to device clear DCL and selective device clear SDC DT1 Complete device trigger capability responds to group execute trigger GET C0 No controller capability 3 7 2 PPM Stand Alone Plot Operation When the PPM is in the Stand Alone Plot mode two functions will exhibit different capa...

Page 118: ...f Averages for CW Power Measurement none n 1 to 999 AVPKnnn Select Number of Averages for Peak Power Measurement none n 1 to 999 CALA Calibrate Channel A Detector Takes time to complete SRQ can monitor successful or unsuccessful completion none CALB Calibrate Channel B Detector Takes time to complete SRQ can monitor successful or unsuccessful completion none CDLAnnnnnn nn Set Channel A Cursor Dela...

Page 119: ... Output Fall Time of Displayed Pulse Profile 90 to 10 on the falling edge of the pulse profile This command erases previously set markers The PPM will output the following string when operating in channel A FALAnn nnnEsnn For channel B FALBnn nnnEsnn n seconds Esnn exponent s polarity FPRVvv vv ss ss mm mm Select External Frequency Input Mode Sweeper Connected to Rear Panel Input Determines Detect...

Page 120: ... second marker result will be the marker a delay minus the marker b delay MKDF 1 No Op with the 8500A Deselect all Marker Difference Pairs none MKPA Autoplace All Four Markers as previously selected and Output Their Delays If the PPM is in Channel A it will output MRKA1 nn nnnEsnn 2 nn nnnEsnn 3 nn nnnEsnn 4 nn nnnEsnn If the PPM is in channel B it will output the same as above only with MRKB head...

Page 121: ...tly Displayed at Slower Speed for Transparencies Same as PLOT but slower pen speed PLWD Measure and Output Pulse Width of Pulse Profile Currently Displayed 50 point on rising edge of pulse to 50 point on the falling edge of the pulse This command erases previously set markers The PPM will output the following string when operating in channel A WIDAnn nnnEsnn For channel B WIDBnn nnnEsnn PRFAsnn nn...

Page 122: ...n seconds Esnn exponent s polarity PUWE Set Pulse Width End none n expressed in 0 1 units 1 to 999 0 1 to 99 9 PUWS Set Pulse Width Start none n expressed in 0 1 units 1 to 999 0 1 to 99 9 RDLAnnnnnn nn Set Channel A Reference Delay none RDLBnnnnnn nn Set Channel B Reference Delay none n microseconds 213 999 97 max RECLnn Recall Non Volatile Set Memory Number n none n memory location 0 to 10 0 is ...

Page 123: ... the 50 power point on the pulse s rising edge and the 50 point on it s falling edge Channel A readout is RISAnn nnnEsnn WIDAnn nnnEsnn Channel B readout is RISBnn nnnEsnn WIDBnn nnnEsnn SDLAnnnnnn nn Set Channel A Start Delay none n microseconds position of decimal may vary Max 213 999 97 µs Window Delay Reference Delay Min 0 Reference Delay Start Delay is with respect to the Reference Delay If R...

Page 124: ...ple shows a data string for 3 triggers Subsequent triggers will produce more data points separated by commas in the form of PWRAnn nnEsnn For channel B the header before the data points would be PRWB instead of PWRA The PPM s dBm Mode output for channel A would be DBMAsnnn nn DBMAsnnn nn DBMAsnnn nn s polarity n dBm This example shows a data stream for 3 triggers Subsequent triggers will produce m...

Page 125: ...of fall time Pulse width is the time between the 50 point on the pulse s rising edge and the 50 point on it s falling edge When operating in channel A the PPM will output WIDAnn nnnEsnn FALAnn nnnEsnn For Channel B the output is WIDBnn nnnEsnn FALBnn nnnEsnn n delay in seconds Esnn exponent WDLAnnnnnn nn Set Channel A Delay Window none n microseconds position of decimal point may vary 0 012 µs min...

Page 126: ...r modes The PPM will output power measurement data the next time a trigger occurs 3 10 Data Formats Data will be in the following formats dBm Mode snnnn 0 CR LF NULL EOI Interpret snnnn 0 as nnn n dBm Range 1 microwatts snnnn 1 CR LF NULL EOI Interpret snnnn 1 as nnn n µW Range 2 milliwatts snnnn 2 CR LF NULL EOI Interpret snnnn 2 as nn nn mW Range 3 milliwatts snnnn 3 CR LF NULL EOI Interpret snn...

Page 127: ...aches the Delay Line It uses the signal to provide an Internal Trigger controlled and conditioned by the A5 Digital Delay board when the internal trigger is selected The Peripheral Interface circuits interface read and write signals under the control of the CPU board The Analog board also receives temperature information sensed by the thermistor in each detector The programmable delay function of ...

Page 128: ...hen zeroing the instrument The A12 Calibrator assembly contains the 1 GHz Programmable Calibration Source that furnishes a precise signal for automatic calibration of the PPM detectors KEYBOARD GPIB INTERFACE PROGRAMMABLE DELAY A5 A3 A8 CPU A4 DISPLAY A10 thru A8 SAMPLE HOLD A D CONVERTER A6 A7 Delay Line COMP NET A6 A7 MODEL 8502A Channel A shown Channel B is identical CPU BUS CALIBRATOR CONTROLL...

Page 129: ...it is sensitive to the voltage drop across R29 which is controlled in parallel through Q6 U2A is the current limiter for 5 V and U3A is the current limiter for 5 V U4 compares the unregulated 5 V with the reference from U5 If its output is too low the AC Fail signal will tell the CPU that the power is about to fail R61 CR19 and C21 will keep the voltage supply at U4 up long enough for the 5 V to d...

Page 130: ...enerator for clicks and beeps as described in Chapter 3 and it also has the GPIB interface and calibrator control circuitry With reference to Sheet 1 of DWG 21015 the GPIB interface is through U1 buffered by U2 and U4 U1 performs the proper interfacing between the GPIB and the data and address lines and the chip select Figure 4 2 GPIB Cal Control A3 Block Diagram Series 8500A Peak Power Meters 4 4...

Page 131: ...om U9 ports C0 and C1 to U10 ports A0 and A1 and a write enable signal from U9 port C3 to U10 WR The CS port on U10 is not used Signals from A0 and A1 control the operation of U10 so that a write operation can either load the data into the DAC internal register s least significant byte or through DB0 to DB5 to the most significant byte or to transfer the register data to the DAC output U13 and U10...

Page 132: ...witch on CR1 and CR2 C9 then serves to stabilize the complete control loop while the thermistor bridge system controls the oscillator The control system operates in the following way The oscillator provides RF power to the thermistor and the more RF applied the less dc power is required in the self balancing bridge Consequently as the RF power increases the voltage at TP9 will decrease This voltag...

Page 133: ...ecked for the correct signals on the A3 GPIB Cal Control board Test Point Description TP1 5 V TP2 5 V Common TP3 15 V TP4 15 V Common TP5 Output of the control amplifier for the Calibrator control Its voltage ranging from a few hundred mV to 10 V will be related to the power required by the Calibrator TP6 15 V TP7 Measure from TP7 to TP3 to give an indication of the current through the oscillator ...

Page 134: ...4 2 3 CPU PC Assembly A4 See Figure 4 4 and schematic diagram 16879 in Chapter 8 Figure 4 4 CPU A4 Block Diagram Series 8500A Peak Power Meters 4 8 Manual No 20790 Rev C November 1998 ...

Page 135: ...he address lines hold a valid address Address lines 16 17 18 and 19 select one of the 16 outputs of the multiplexer which will be used as the device select line CS0 through CS15 CS0 through CS7 address the memories CS8 through CS13 address different I O devices and CS15 addresses devices that require a handshake according to the 6800 protocol U15A U38 U19A D E and U16 create the proper timing and ...

Page 136: ...errupt Priority Decoder interfaces the three interrupt priority lines IPL0 IPL1 and IPL2 to the seven interrupt request lines IRQ1 through IRQ7 The three output lines of U37 will have encoded the number of the highest priority input line that has been driven low As can be seen on the schematic the AC Fail line is connected to the highest priority interrupt input The lowest priority interrupt input...

Page 137: ...e While the instrument is turned on CR2 keeps the battery from being back charged A4 Test Points The test points in Table 4 3 can be checked for the correct signals on the A4 CPU board Test Point Description TP1 System Clock 12MHz TP2 Read Write signal from U13 TP3 5 V Common TP4 5 V TP5 Reset Signal from U17 TP6 Real Time Clock U1 Output Used for Calibration TP7 Interrupt Request Signal from U1 T...

Page 138: ...there is a complex interaction between each of the sub functions of the delay board circuitry This section describes the sequence of events that occur in the delay board starting with the reset of the circuits and continuing through the generating of the pulse sample outputs A detailed description of individual circuitry blocks on the Digital Delay PC board follows the sequence of events Figure 4 ...

Page 139: ...25A to turn on the Ramp Generator As the output voltage reaches the level determined by the selected delay the Sample Comparator U34 will flip and trigger the Pulse Shaper to produce the sample pulses The output will also turn off the Ramp Generator by resetting U25A in the Ramp Control Logic circuit The Sample 2 leading edge then sets the Delay board Reset Latch and the Interrupt Latch and resets...

Page 140: ...n This serves to minimize the noise normally generated by the CPU when an analog signal sample is taken All of the control of the delay board is accomplished through the two PPIs Parallel Peripheral Interface U6 and U7 They are configured so that all of their total of 48 ports are outputs Both PPIs are selected through the CS10 line Selection of U6 is done by having the write signal WR and the rea...

Page 141: ...s Its output is determined by the data present on the Trig Level Bus and can be monitored at TP15 The amplitude range is 0 to 10 23 V with 10 mV resolution Registers R16 and R17 form a voltage divider to give a level between 0 and 2 56 V which is sent to the Trig Comparators Internal Trig Comparators The Internal Trig Comparators consist of one fast comparator each for channel A and channel B Inte...

Page 142: ... C and Y1 U23A is a positive feedback amplifier with the Y1 crystal U23C provides a dc bias to the input and U23B is an output buffer The frequency is adjusted with C79 The clock frequency can be measured with a high impedance probe at TP5 Clock Gate The Clock Gate provides the timing to the Counter when either in the count mode or in the delay data mode When counting the clock is enabled with a c...

Page 143: ... the count output from the Counter It consists of a double buffered sample and hold amplifier with input and output tied together It is reset by the New Data Ack signal from the CPU Interface The Sample input from the Ramp Control Logic samples the voltage for 33 µs and then holds the voltage The hold mechanism only prevents the voltage from increasing not from decreasing A controlled current leak...

Page 144: ... full scale with 5 86 mV resolution The output voltage can be measured at TP6 Pulse Shaper The Pulse Shaper is triggered by the Sample Comparator and provides the sample signals to the samplers on the analog boards It also provides a synch signal to the rear panel SYNCH OUTPUT connector of the instrument The synch signal is simultaneous with the 15 ns wide Sample 1 signal The Sample 2 signal is al...

Page 145: ...me TP2 5 2 V TP3 5 V Common TP4 5 V TP5 Clock Frequency C79 adjusts TP6 Output of U36 U37 DAC which determines the 0 to 25 5 ns threshold TP7 U34 comparator input TP8 U34 comparator input TP9 U37B hold amplifier output TP10 10 V Reference TP11 U34 comparator output TP12 5 V Common TP13 U39 comparator output trigger signal TP14 U39 comparator output trigger signal TP15 U40 Trigger level DAC TP16 15...

Page 146: ... A6 is the reference designation for the channel A board and A7 is the designation for the channel B board Both boards are configured the same The Model 8501A meter uses only A6 Refer to Figure 4 7 and sheet 1 of schematic diagram 20742 in Chapter 8 Figure 4 7 Analog PC A6 A7 Block Diagram Series 8500A Peak Power Meters 4 20 Manual No 20790 Rev C November 1998 ...

Page 147: ...mple is directed to the fast sample and hold circuit it comes in through the Sample 1 line on the left side of the schematic as a balanced ECL signal and then goes to differential receiver Q2 and Q3 When a trigger is sent Q2 produces a current pulse to trigger blocking oscillator Q4 The blocking oscillator generates a 20 V pulse approximately 30 ns long at the secondary of T1 This pulse overcomes ...

Page 148: ... there will be a resolution of exactly 2 mV corresponding to 0 02 dB when R47 is adjusted to the proper gain setting The total range is from 30 to 50 dBm Refer to sheet 2 of schematic diagram 20742 The board first has an RC network that compensates for the frequency dependent losses in the delay to assure correct pulse response The signal is sent from the board to the delay line Sheet 2 also shows...

Page 149: ...Reference TP3 Output of the analog DAC TP4 Analog output as seen on the rear panel connection TP5 Output of the 2nd sample and hold TP6 5 V TP7 5 V Common TP8 5 V TP9 15 V TP10 15 V TP11 15 V Common TP12 Can be used as scope trigger TP13 0 Vdc adjust readout point Table 4 5 A6 A7 Analog Test Points Theory of Operation Manual No 20790 Rev C November 1998 4 23 ...

Page 150: ... U3 and U7 provides the interface to the keyboard and front panel indicator lamps through U2 U4 and U7 and interfaces with the spin knob on the front panel Refer to Figure 4 8 and sheet 1 of schematic diagram 20196 Figure 4 8 Front Panel Interface A8 Block Diagram Series 8500A Peak Power Meters 4 24 Manual No 20790 Rev C November 1998 ...

Page 151: ...ves go through RC networks and then give four inputs to U10 Each one of the inputs represents an up or down going edge of one of the U8A B square waves The output is a pulse train of short pulses that indicate when the spin knob is being moved U21A receives the pulse train and U17A B C D decode the direction of movement If the knob is turned in one direction U21B will have the same pulse train Whe...

Page 152: ...Point Description TP1 5 V Common TP2 Clock 2 MHz TP3 5 V TP4 Shift Signal TP5 I Sense TP6 Timer 100 ms pulse from spin knob movement TP7 Flyback TP8 HV TP9 HV TP10 20 V Unregulated TP11 MV TP12 A Ground Table 4 6 A8 Interface Assembly Test Points Series 8500A Peak Power Meters 4 26 Manual No 20790 Rev C November 1998 ...

Page 153: ...ents with the same accuracy usually associated with thermistor power meters Since the automatic calibration system is a new concept developed by Giga tronics for calibrating diode detectors the first portion of this discussion will be a general description of the overall theory involved in the system operation The last part of the discussion will cover the operation of the specific components cont...

Page 154: ...nuation of each range can be calculated The automatic calibration system generates a table of detector voltages that are equivalent to a known level of input power This is done by applying many different input powers to the detector measuring the amplified detector output and storing the result The calibration procedure is completely automatic and the entire process including the range switching a...

Page 155: ...gh the attenuator is flowing in the direction required to turn on the series diode CR2 then the attenuator is bypassed and minimum attenuation occurs If the control current is in the other direction CR2 is turned off and CR1 and CR4 will conduct so that 10 dB of signal will be lost The other stages are similarly switched in and out to allow attenuation from 0 to 40 dB in 10 dB stages The output th...

Page 156: ...Series 8500A Peak Power Meters 4 30 Manual No 20790 Rev C November 1998 ...

Page 157: ...C 9 F of this temperature at the time of calibration If the PPM has not been previously used you should review Chapter 2 of this manual to ensure that power requirements and detector precautions have been complied with before the instrument is turned on The instrument has been factory calibrated and should not be re calibrated before the performance tests detailed in this chapter have been complet...

Page 158: ...at least 0 5 Thermistor Mount HP Model 8478B 1 1 SWR 1 GHz Digital Voltmeter DVM Fluke Model 8600A 0 05 accuracy Directional Coupler Narda Model 3002 10 dB 1 15 SWR 1 GHz Step Attenuator 0 to 50 dB in 10 dB increments Weinschel Model 1 1 15 SWR 1 GHz Accuracy 0 1 dB RF Source Signal Generator Wavetek Model 2510A Option XP 20 dBm 1 GHz pulse mod Low Pass Filter HP Model 360B 30 dB attenuation 2 GHz...

Page 159: ...uld any key be pressed other than the ones specified CAUTION Do not press any UNITS key when the thermistor detector is connected to the calibrator This would cause the calibrator to output 100 mW and would possibly destroy the thermistor detector 2 Press CLEAR then zero the Thermistor Power Meter 3 Press 7 and read the Thermistor Power Meter Take note of the meter reading 4 Repeat Steps 1 and 2 A...

Page 160: ...calibration is performed by first attaching the detector to the 1 GHz Calibrator connection on the front panel of the PPM and then pressing MENU 1 F3 F1 UNITS 6 Be sure that the Thermistor Power Meter is zeroed correctly Adjust the RF source for a reading of 10 0 mW 0 25 mW 7 Record the Power Meter Reading and the PPM Reading in the corresponding columns of the CW Linearity Data section of the Per...

Page 161: ...each level of attenuation Add the previous and current linearity errors to determine the accumulated error 14 Set the Pulse Generator to generate 5 V pulses TTL with 10 µs duration and a repetition rate of 1 kHz Connect the Pulse Generator output to the TRIG Input on the rear panel of the PPM 15 Set the PPM to use an external trigger in the Peak Mode milliwatts display and peak averaging set to 10...

Page 162: ...ulse signal and has a rise time less than about 30 ns 3 Set the PPM to read in the Graph Mode by pressing GRAPH Press GRAPH again to cause the autoscale function to be performed after the PPM has been connected to the Pulse Generator A graph of the pulse profile should now be displayed 4 Select a delay window of 0 2 µs and set the cursor delay to place the cursor at the 50 point on the rising edge...

Page 163: ...10 00 V The display should read 10 000 GHz 0 050 GHz 5 2 9 Detector Return Loss Test Use the 8003 or another return loss test setup appropriate to the frequency range of the detectors to be used with the PPM Measure the return loss of the detector s used with the PPM Specifications depend on the type of detector its frequency range and the type of connector being used Refer to Appendix D to determ...

Page 164: ...on or at any time calibration is required due to environmental or physical conditions All test points and adjusting components are labeled and are accessible at the top of the PC boards It is not necessary to remove any PC boards from the unit to perform these calibration procedures Figure 5 3 is a reference locater for the various components required for adjusting purposes during the calibration ...

Page 165: ...Figure 5 3 Model 8501A 8502A Calibration Components Testing and Calibration Manual No 20790 Rev C November 1998 5 9 ...

Page 166: ...M should be placed into a preset condition The Information given in this chapter can be used to calibrate and or confirm calibration of the PPM and its detector s using the built in automatic detector calibration system A Frequency Counter Timer 1 Set FUNCTION switch to PERIOD A 2 Set AVERAGES switch to 10 to the 6th power 3 Set SLOPE switch to 4 Set ATTEN switch to X1 5 Set SOURCE switch to EXT 6...

Page 167: ...e by more than 5 2 mV 3 Set the Variac to 115 Vac C 15 V Adjust 1 Connect the DVM LO test lead to A2TP6 2 Connect the DVM HI test lead to A2TP5 3 Adjust A2R22 15 V ADJ for a DVM reading of 15 000V 15 mV 4 Vary the Variac voltage from 100 to 130 Vac The DVM reading must not change by more than 15 mV D 15 V Check 1 Connect the DVM HI test lead to A2TP3 The DVM must read 15 000 V 45 mV 2 Vary the Var...

Page 168: ...8502A and a channel B detector is connected perform the following steps a Connect the channel B detector to the Calibrator output b Press CLEAR UNITS and wait for the calibration cycle to complete c Disconnect the detector from the Calibrator output C Set the Internal Clock The Internal Clock can be set as follows 1 Press MENU 5 F3 F1 2 Enter the correct date mmddyy UNITS 3 Enter the correct time ...

Page 169: ...t 5 V TTL Connect the pulse generator to the TRIG INPUT TTL on the rear panel of the PPM 4 Press PEAK MENU F2 5 Adjust A6R112 SAMPLER ZERO for 0V 2 mV offset at the end of the sample time C Trigger Offset Adjust 1 Set the trigger to channel A Internal 15 dBm by pressing MENU 1 F1 channel A if unit is an 8502A 15 dBm 2 Connect the DVM HI lead to A6TP13 TRIGGER OFFSET 3 Adjust A6R113 TRIG OUT DC OFF...

Page 170: ...t E Thermistor Sense Circuit 1 Press CLEAR 4 F1 2 The reading should be approximately 5000 mV at a detector temperature of 30 C 82 4 F The reading will vary about 0 2 V C with any increase or decrease in temperature from the 30 C level a new reading is taken each time F1 is pressed 3 Press CLEAR CLEAR Series 8500A Peak Power Meters 5 14 Manual No 20790 Rev C November 1998 ...

Page 171: ... e g 0 2 dBm adjust A3R16 clockwise to approximately twice the error b Press any of the numeric keys to take a reading c Repeat Steps a and b until the power meter reads 0 00 dBm 4 Disconnect the detector from the PPM 5 Press CLEAR C Power Meter Calibrate 1 Connect the Detector to the Calibrator output use channel A if the unit is an 8502A 2 Press UNITS 3 Wait for the PPM to calibrate itself about...

Page 172: ... Start Delay and the right edge is equal to the Delay Window plus the Start Delay The division marks on the left side of the display represent the 10 50 90 and 100 Reference Power levels 3 Select External Trigger by pressing MENU F2 4 Adjust the Start Delay to move the start of the pulse near the beginning of the graphics display a Move the cursor to the STRT DLY line b Rotate the spin knob clockw...

Page 173: ...sor to DLY WIND entering 12 and pressing ns 10 Set the Reference Power Move the cursor to the REF PWR line and press UNITS 11 Adjust A5R30 Vernier Delay to its maximum ccw position 12 The display should look similar to Figure 5 5 13 Adjust A5R30 ccw until the rise time of the displayed pulse is smooth see Figure 5 6 14 Set the peak averaging number to 50 by pressing MENU 2 F2 50 UNITS 15 The risin...

Page 174: ...76 2 4516 3 4560 3 4500 486 40 480 40 1 4848 1 4788 2 4832 2 4772 3 4816 3 4756 512 00 506 00 1 5104 1 5044 2 5088 2 5028 3 5072 3 5012 537 60 531 60 1 5360 1 5300 2 5344 2 5284 3 5328 3 5268 563 20 557 20 1 5616 1 5556 2 5600 2 5540 3 5584 3 5524 588 80 582 80 1 5872 1 5812 2 5856 2 5796 3 5840 3 5780 614 40 608 40 1 6128 1 6068 2 6112 2 6052 3 6096 3 6036 640 00 634 00 1 6384 1 6324 2 6368 2 630...

Page 175: ...ITOR output to the B channel MONITOR output on the 8502A e The Scope display should be the same as Step 2 4 Disconnect the terminated coaxial cable from both the 8502A and the Scope B Sync Output 1 Connect a coaxial cable no termination from the SYNC output on the back of the PPM to the Scope 2 The Scope display should be similar to Figure 5 7 3 Disconnect the coaxial cable from both the PPM and t...

Page 176: ...he Scope display must drop to near 0 V and then return back to 5 V 5 3 11 Volume Adjust 1 Adjust the VOLUME ADJ on the back of the PPM fully ccw 2 Press several keys Very little if any sound clicks should be heard from the speaker when the keys are pressed 3 Adjust the VOLUME ADJ fully clockwise 4 Press several keys The clicks should be very easy to hear when the keys are pressed The volume of the...

Page 177: ...g R Reference Power Ratio Reading Ratio Linearity Error 1 Linearity Specification Accumulated Linearity Error 2 0 dB 10 00 mW 0 25 mW P1 P1 P2 R1 R2 1 00 mW 0 025 mW P2 4 Same as Lin error above 10 dB 10 00 mW 0 25 mW P1 R1 P1 P2 R1 R2 1 00 mW 0 025 mW P2 R2 4 20 dB 10 00 mW 0 25 mW P1 R1 P1 P2 R1 R2 1 00 mW 0 025 mW P2 R2 4 30 dB 10 00 mW 0 25 mW P1 R1 P1 P2 R1 R2 1 00 mW 0 025 mW P2 R2 4 40 dB 1...

Page 178: ... P2 R1 R2 1 00 mW 0 025 mW P2 R2 7 30 dB 10 00 mW 0 25 mW P1 R1 P1 P2 R1 R2 1 00 mW 0 025 mW P2 R2 39 3 Linearity Error R1 R2 P1 P2 1 100 4 Accumulated error is the sum of the current dB segment linearity error plus the previous accumulated error Other Test Results Listed in the same order as given in the performance test Test See Section Specifications Reading Calibration Output Level 5 2 3 0 995...

Page 179: ... reading 5 3 3 B 1 5 000 V to 5 400 V 5 3 3 B 2 Within 5 2 mV of B 1 reading 5 3 3 C 3 14 985 V to 15 015 V 5 3 3 C 4 Within 15 mV of C 3 reading 5 3 3 D 1 14 995 V to 15 045 V 5 3 3 D 2 Within 15 mV of D 1 reading A6 A7 8502A Only Analog Board 5 3 6 A 3 9 997 V to 10 003 V 5 3 6 B 5 2 mV to 2 mV 5 3 6 C 3 1 mV to 1 mV 5 3 6 D 4 10 mV to 10 mV 5 3 6 D 6 2 975 V to 3 025 V 5 3 6 D 8 4 965 V to 5 03...

Page 180: ...Series 8500A Peak Power Meters 5 24 Manual No 20790 Rev C November 1998 ...

Page 181: ...e the instrument to overheat which may cause the thermal sensor to shut the instrument off in the middle of a test routine If dirty the filter should be removed and cleaned with a mild detergent and water solution Replacement filters can be ordered from the factory 2 Remove the filter from its holder by snapping the retainer out of the holder Do not remove the screws from the filter holder 3 Inspe...

Page 182: ...Frequency Counter Timer Tektronix Model DC509 30 µs period 1 ppm Oscilloscope Scope Tektronix Model 465 5 mV DIV 50 MHz bandwidth Power Meter Giga tronics Series 8540 0 95 to 1 05 GHz at 0 dBm 1 3 Precision Voltage Source Digitec Model 3110 5 000 V with 0 02 accuracy Pulsed RF Signal Generator Giga tronics Model 907 Trig Modulator Variac General Radio Model W5MT3A Metered RF Detector Giga tronics ...

Page 183: ... 17075 or equivalent is needed for troubleshooting the A2 Power Supply PC board and the Giga tronics Extender board P N 17076 or equivalent is required for troubleshooting the A3 GPIB Cal A4 CPU A5 Digital Delay and A6 A7 Analog PC boards to component level 6 3 2 Power On Failure 1 No indication that the power is turned on when the ON button is pressed fan not running and no lights on the front pa...

Page 184: ...lies 5 2 V to the Analog A D Converter A6U7 through switch A6U13 The 5 2 V must be between 4 94 and 5 46 V 1 Check the 5 2 V regulator circuit on PC board A2 2 Check the switches A6U13C and A6U20 on the A6 Analog board 3 Check the PPI chip A6U1 Self Test 2 Error Number 02 Memory Bad This test performs a walking 1 s test on the volatile RAM Clears the memory then writes and reads a 1 to each memory...

Page 185: ...0 mV 1 A6R47 LIN GAIN is not adjusted properly See Section 5 3 6 2 Check DAC circuit A6U8 A6U14A and A6U21A 3 Check analog switches A6U20 and A6U13C 4 Check the PPI chip A6U1 5 Check the decoder circuit consisting of A6U2C D A6U3C and A6U5D Self Test 8 Error Number 08 B Channel Analog Output DAC Use the same description and Troubleshooting procedures as given in Self Test 7 preceding All reference...

Page 186: ... Frequency input has not been selected See PROM Frequency Correction in Section 2 8 2 b Check A6U20 or A7U20 if this is a B channel problem c Check A6R81 A6R140 and A6C94 d Check A6U1 3 The SYNC OUTPUT is not functioning a Check A5U35C NOTE This is an ECL level pulse with a width of approximately 20 ns 4 The RF BLANKING OUTPUT is not functioning properly a Check A3Q7 b Check A3U8 5 The MONITOR OUT...

Page 187: ...15134 002 1 58900 15134 002 LABEL A2 PER DWG 10 15134 003 1 58900 15134 003 LABEL A3 PER DWG 11 15134 004 1 58900 15134 004 LABEL A5 PER DWG 12 15134 005 1 58900 15134 005 LABEL A6 PER DWG 13 15134 010 1 58900 15134 010 ID LABEL A4 14 15295 1 58900 15295 LABEL BOTTOM DECK 15 16536 003 2 58900 16536 003 HANDLE STRAP 12 75 LG 16 16956 001 1 58900 16956 001 8500 SERIES DET EXT CABLE 1 5M 17 16957 1 5...

Page 188: ...RAP 12 75 LG 15 16956 001 2 58900 16956 001 8500 SERIES DET EXT CABLE 1 5M 16 16957 1 58900 16957 TOP COVER 17 16958 1 58900 16958 BOTTOM COVER 18 17018 1 58900 17018 RIVETED PS COVER ASSY 19 17027 001 8 58900 17027 001 SCR TRUSS HD 4 40X 25 MED GREY 20 17028 001 8 58900 17028 001 SCR TRUSS HD 4 40X 25 LT GREY 21 17325 1 58900 17325 HOLDDOWN PCB 22 19975 003 1 58900 19975 003 SHIPPING BOX 275 DW 3...

Page 189: ...SCHEMATIC 8501A 8502A INSTR 23 20527 REF 58900 20527 SCHEMATIC FRONT PANEL 24 XARC 00002 0 58900 XARC 00002 SILVER FILLED RTV 25 21118 1 58900 21118 LABEL TESTED BY 26 70112 REF 58900 70112 PROCEDURE MODEL 8501A 31 60334 REF 58900 60334 8500A CALIBRATION PROC 27 60304 REF 58900 60304 8500A PRETEST PROC 29 60348 REF 58900 60348 MODEL 850X 850XA SYS TEST PRO 30 30019 REF 58900 30019 8500 8500A JIT F...

Page 190: ...23 20527 REF 58900 20527 SCHEMATIC FRONT PANEL 24 XARC 00002 0 58900 XARC 00002 SILVER FILLED RTV 25 21118 1 58900 21118 LABEL TESTED BY 26 70113 REF 58900 70113 PROCEDURE MODEL 8502A 31 60334 REF 58900 60334 8500A CALIBRATION PROC 27 60304 REF 58900 60304 8500A PRETEST PROC 29 60348 REF 58900 60348 MODEL 850X 850XA SYS TEST PRO 30 30019 REF 58900 30019 8500 8500A JIT FLOW CHART A1 16932 001 1 589...

Page 191: ...SY 8502A Rev A Item Part Number Qty Cage Mfr s Part Number Description 1 ETIM 02062 1 2R182 862 2 LUG TERMINAL STRIP 2 ETIM 02063 1 2R182 820 2 LUG TERMINAL STRIP 3 HSTH 41104 12 06540 8217 46 B 0440 28 4 40 X 23 32 HEX SPACER 4 14955 065 1 58900 14955 065 LABEL TO A1J16 5 14955 069 1 58900 14955 069 LABEL TO A1J17 6 20511 1 58900 20511 FRONT SUB PANEL 8502A 7 20736 2 58900 20736 GUARD FLAT CABLE ...

Page 192: ...B U CABLE ASSY 21148 REAR PANEL ASSY 8502A Rev A Item Part Number Qty Cage Mfr s Part Number Description 1 HPM0 00687 2 57771 D3047 11 16 HOLE PLUG 2 HPM0 00500 1 18310 790 3008 1 2 HOLE PLUG 3 JIB0 01089 5 56501 RA 250 FEMALE QUICK DISCONNECT 4 16966 1 58900 16966 AC SWITCH MTG BKT 5 16973 4 58900 16973 INSULATING FLAT WASHER 6 BHF0 13000 1 9Y422 FF325G 3 FAN FILTER 7 17141 1 58900 17141 REAR PAN...

Page 193: ...DISPLAY 6 20877 1 58900 20877 FRAME EL DISPLAY 7 20878 001 2 58900 20878 001 CONN ELASTOMER 1 440 LG 8 20878 002 2 58900 20878 002 CONN ELASTOMER 5 065 LG 9 70128 REF 58900 70128 EL DISPLAY ASSY PROC A1 20832 1 58900 20832 EL DISPLAY DRIVER PCB ASSEMBLY A2 20835 1 58900 20835 EL DISPLAY LOGIC PCB ASSEMBLY 16869 DELAY LINE ASSEMBLY Rev D Item Part Number Qty Cage Mfr s Part Number Description 1 WCB...

Page 194: ...CERAMIC X7R C6 CC51 04100 1 04222 SR205C 104KAA 1 UF CERAMIC X7R C7 CC50 03100 1 54583 RD30HX7R103K 01 UF CERAMIC X7R C8 CC50 03100 1 54583 RD30HX7R103K 01 UF CERAMIC X7R C9 CC50 03100 1 54583 RD30HX7R103K 01 UF CERAMIC X7R C10 CC50 03100 1 54583 RD30HX7R103K 01 UF CERAMIC X7R C11 CC50 03100 1 54583 RD30HX7R103K 01 UF CERAMIC X7R C12 CC50 03100 1 54583 RD30HX7R103K 01 UF CERAMIC X7R C15 CC51 04100...

Page 195: ... 00100 1 58900 JRBM 00100 SMB M PC MOUNT R1 RC20 00056 1 01121 RC20GF5R6J 5 6 OHM 5 1 2 W CARBON R2 RC20 00056 1 01121 RC20GF5R6J 5 6 OHM 5 1 2 W CARBON R3 RC20 00056 1 01121 RC20GF5R6J 5 6 OHM 5 1 2 W CARBON R4 RC20 00056 1 01121 RC20GF5R6J 5 6 OHM 5 1 2 W CARBON R5 RN55 11000 1 91637 RN55C1001F 1 K OHMS 1 MET FILM R6 RN55 11000 1 91637 RN55C1001F 1 K OHMS 1 MET FILM RP2 RM9S 21001 1 58900 RM9S 2...

Page 196: ...HQIP 00050 4 13103 7717 22 N TO5 NYLON INSULATOR 4 FHC0 00001 4 75915 102071 FUSE CLIP 5 JSP0 10008 3 09769 2 640463 1 8 PIN DIP SOCKET 6 JSP0 10014 1 09769 2 641609 1 14 PIN DIP SOCKET C1 CC99 01220 1 3W023 DD221 220 PF 1000V CERAMIC X5F C2 CC50 02100 1 04222 SR155C122MAT 001 UF CERAMIC Y5P C3 CC50 03100 1 54583 RD30HX7R103K 01 UF CERAMIC X7R C4 CT25 R6680 1 31433 T354L686K025AS 68UF 25V RADIAL C...

Page 197: ...T FILM R12 RC32 01000 1 SPR1 101 J 100 OHM 10 1 W CARBON R13 RC32 01000 1 SPR1 101 J 100 OHM 10 1 W CARBON R14 RN55 12210 1 91637 RN55C2211F 2 21 K OHMS 1 MET FILM R15 RN55 11000 1 91637 RN55C1001F 1 K OHMS 1 MET FILM R16 RN55 21000 1 91637 RN55C1002F 10 K OHMS 1 MET FILM R17 RN55 14990 1 91637 RN55C4991F 4 99 K OHMS 1 MET FILM R18 RN55 12100 1 91637 RN55C2101F 2 1K OHMS 1 MET FILM R19 RN55 41000 ...

Page 198: ...65 RN55 12210 1 91637 RN55C2211F 2 21 K OHMS 1 MET FILM R66 RN55 00825 1 91637 RN55C82R5F 82 5 OHMS 1 MET FILM R67 RN55 23010 1 91637 RN55C3012F 30 1 K OHMS 1 MET FILM R68 RN55 21000 1 91637 RN55C1002F 10 K OHMS 1 MET FILM TP1 ETT0 00001 1 63345 330 100W TIN PLATE TEST JACK PIN TP2 ETT0 00001 1 63345 330 100W TIN PLATE TEST JACK PIN TP3 ETT0 00001 1 63345 330 100W TIN PLATE TEST JACK PIN TP4 ETT0 ...

Page 199: ...ATIC GPIB CAL CONTROL 3 JSP0 11022 1 09769 2 641603 3 22 PIN DIP SOCKET 4 JSP0 10008 4 09769 2 640463 1 8 PIN DIP SOCKET 5 JSP0 10014 5 09769 2 641609 1 14 PIN DIP SOCKET 6 JSP0 10016 1 09769 2 614610 2 16 PIN DIP SOCKET 7 JSP0 10020 2 09769 2 641612 1 20 PIN DIP SOCKET 8 JSP0 10040 3 09769 2 641616 1 40 PIN DIP SOCKET C6 CC98 00330 1 CCD 330 33 PF 1KV CERAMIC NPO C7 CT35 R5470 1 31918 TAPS4 7M35 ...

Page 200: ... 21000 1 91637 RN55C1002F 10 K OHMS 1 MET FILM R4 RN55 21000 1 91637 RN55C1002F 10 K OHMS 1 MET FILM R12 RN55 00475 1 91637 RN55C47R5F 47 5 OHMS 1 MET FILM R13 RN55 11000 1 91637 RN55C1001F 1 K OHMS 1 MET FILM R14 RN55 24750 1 91637 RN55C4752F 47 5 K OHMS 1 MET FILM R15 RN57 21000 1 58900 RN57 21000 10K OHM 1 MET FILM R16 RAPK 15000 1 5Y491 66XR5K 5 K 10 20T PC MNT R17 RN55 14750 1 91637 RN55C4751...

Page 201: ...T FILM R95 RN55 22210 1 91637 RN55C2212F 22 1 K OHMS 1 MET FILM R96 RN55 11000 1 91637 RN55C1001F 1 K OHMS 1 MET FILM R97 RN55 14990 1 91637 RN55C4991F 4 99 K OHMS 1 MET FILM R98 RN55 24990 1 91637 RN55C4992F 49 9 K OHMS 1 MET FILM R113 RN57 21000 1 58900 RN57 21000 10K OHM 1 MET FILM R114 RN57 21000 1 58900 RN57 21000 10K OHM 1 MET FILM R115 RN55 14990 1 91637 RN55C4991F 4 99 K OHMS 1 MET FILM R1...

Page 202: ...2N QUAD OR U15 UTN0 00321 1 01295 SN74LS32N SN74LS32N QUAD OR U16 UTN0 01641 1 01295 SN74LS164N SN74LS164N SHIFT REGISTER U17 ULN0 00555 1 04713 MC1455P1 MC1455P 200MA TIMER U18 UTN0 00271 1 01295 SN74LS27N TI 74LS27N 3X3 INPUT NOR U19 UTN0 00041 1 01295 SN74LS04N SN74LS04 HEX INVERTER U20 UTN0 00081 1 01295 SN74LS08N SN74LS08 QUAD AND U21 UTN0 00101 1 01295 SN74LS10N SN74LS10 TRIPLE NAND U22 UTN0...

Page 203: ...C X7R C22 CC51 04100 1 04222 SR205C 104KAA 1 UF CERAMIC X7R C23 CC51 04100 1 04222 SR205C 104KAA 1 UF CERAMIC X7R C24 CC51 04100 1 04222 SR205C 104KAA 1 UF CERAMIC X7R C25 CC98 00220 1 56289 10TCC Q22 22 PF 1KV CERAMIC NPO C26 CC51 04100 1 04222 SR205C 104KAA 1 UF CERAMIC X7R C27 CC51 04100 1 04222 SR205C 104KAA 1 UF CERAMIC X7R C28 CC51 04100 1 04222 SR205C 104KAA 1 UF CERAMIC X7R C29 CC51 04100 ...

Page 204: ...1000 1 91637 RN55C1001F 1 K OHMS 1 MET FILM R12 RN55 21000 1 91637 RN55C1002F 10 K OHMS 1 MET FILM RP1 RM7S 14700 1 58900 RM7S 14700 4 7 KOHM X 7 SIP NETWORK RP2 RM7S 14700 1 58900 RM7S 14700 4 7 KOHM X 7 SIP NETWORK TP1 ETT0 00001 1 63345 330 100W TIN PLATE TEST JACK PIN TP2 ETT0 00001 1 63345 330 100W TIN PLATE TEST JACK PIN TP3 ETT0 00001 1 63345 330 100W TIN PLATE TEST JACK PIN TP4 ETT0 00001 ...

Page 205: ...00741 1 04713 74LS74N 74LS74 DUAL D FLIP FLOP U19 UEN0 10124 1 04713 MC10124P MC10124P QUAD TTL TO ECL U20 UTN0 00001 1 01295 SN74LS00N SN74LS00 QUAD NAND U21 UEN0 10125 1 04713 MC10125P MC10125P QUAD ECL TO TTL U22 UTN0 02211 1 01295 SN74LS221N 74LS221 MONOSTABLE SCHMT U23 UEN0 10105 1 04713 MC10105P MC10105P TRIPLE OR NOR U24 UEN1 10105 1 04713 MC10H105P MC10H105P TRIPLE OR NOR U25 UEN0 10131 1 ...

Page 206: ...1 UF CERAMIC X7R C35 CC50 03100 1 54583 RD30HX7R103K 01 UF CERAMIC X7R C36 CC50 03100 1 54583 RD30HX7R103K 01 UF CERAMIC X7R C37 CC50 03100 1 54583 RD30HX7R103K 01 UF CERAMIC X7R C38 CC50 03100 1 54583 RD30HX7R103K 01 UF CERAMIC X7R C39 CC50 03100 1 54583 RD30HX7R103K 01 UF CERAMIC X7R C40 CC50 03100 1 54583 RD30HX7R103K 01 UF CERAMIC X7R C41 CC50 03100 1 54583 RD30HX7R103K 01 UF CERAMIC X7R C42 C...

Page 207: ...C X7R C108 CC51 01470 1 51642 150 50 X7R 471K 470 PF CERAMIC X7R CR1 DSA0 02900 1 28480 5082 2811 5082 2900 SCHOT DIODE CR2 DRAE 00823 1 04713 1N823 1N823 6 3V REF DIODE CR3 DSA0 04148 1 58900 DSA0 04148 1N4148 G P DIODE Q1 QBNS 03646 1 04713 MPS3646 2N3646 40V 350 MHZ NPN Q5 QBNS 03563 1 27014 PN3563 PN3563 15V 600MHZ NPN Q6 QBNS 03563 1 27014 PN3563 PN3563 15V 600MHZ NPN Q7 QBPS 04121 1 58377 PN...

Page 208: ...N55C6191F 6 19 K OHMS 1 MET FILM R56 RN55 00511 1 91637 RN55C51R1F 51 1 OHMS 1 MET FILM R57 RN55 00511 1 91637 RN55C51R1F 51 1 OHMS 1 MET FILM R58 RN55 00511 1 91637 RN55C51R1F 51 1 OHMS 1 MET FILM R59 RN55 00511 1 91637 RN55C51R1F 51 1 OHMS 1 MET FILM R60 RN55 16810 1 91637 RN55C6811F 6 81 K OHMS 1 MET FILM R62 RN55 00475 1 91637 RN55C47R5F 47 5 OHMS 1 MET FILM R63 RN55 00475 1 91637 RN55C47R5F 4...

Page 209: ... 63345 330 100W TIN PLATE TEST JACK PIN TP8 ETT0 00001 1 63345 330 100W TIN PLATE TEST JACK PIN TP9 ETT0 00001 1 63345 330 100W TIN PLATE TEST JACK PIN TP10 ETT0 00001 1 63345 330 100W TIN PLATE TEST JACK PIN TP11 ETT0 00001 1 63345 330 100W TIN PLATE TEST JACK PIN TP12 ETT0 00001 1 63345 330 100W TIN PLATE TEST JACK PIN TP13 ETT0 00001 1 63345 330 100W TIN PLATE TEST JACK PIN TP14 ETT0 00001 1 63...

Page 210: ...PRECISION OP AMP U13 ULN0 00201 1 24355 ADG201AKN ADG201AKN SPST SWITCH U14 UFN1 00324 1 01295 LM324N LM324AN QUAD OP AMP U15 ULN0 00201 1 24355 ADG201AKN ADG201AKN SPST SWITCH U16 UIN0 00398 1 58900 UIN0 00398 LF398AN SAMPLE HOLD U17 UFN0 34074 1 04713 MC34074L MC34074P QUAD OP AMP U18 UFN0 05135 1 01295 OP 07 CP HA5135 5 PRECISION OP AMP U19 UFN0 05135 1 01295 OP 07 CP HA5135 5 PRECISION OP AMP ...

Page 211: ...5C 104KAA 1 UF CERAMIC X7R C22 CC51 04100 1 04222 SR205C 104KAA 1 UF CERAMIC X7R C24 CC51 04100 1 04222 SR205C 104KAA 1 UF CERAMIC X7R C25 CC50 02100 1 04222 SR155C122MAT 001 UF CERAMIC Y5P C26 CC50 02100 1 04222 SR155C122MAT 001 UF CERAMIC Y5P C27 CC50 02100 1 04222 SR155C122MAT 001 UF CERAMIC Y5P C28 CC98 00470 1 CCD470 47 PF 1KV CERAMIC NPO C29 CC51 04100 1 04222 SR205C 104KAA 1 UF CERAMIC X7R ...

Page 212: ...RAMIC X7R C114 CC51 04100 1 04222 SR205C 104KAA 1 UF CERAMIC X7R C115 CC51 04100 1 04222 SR205C 104KAA 1 UF CERAMIC X7R C116 15776 028 1 90201 C20C101K5R5CA 100 PF CERAMIC X7R CR1 DSA0 04148 1 58900 DSA0 04148 1N4148 G P DIODE CR2 DSA0 04148 1 58900 DSA0 04148 1N4148 G P DIODE CR3 DSA0 04148 1 58900 DSA0 04148 1N4148 G P DIODE CR4 DSA0 04148 1 58900 DSA0 04148 1N4148 G P DIODE CR5 DSA0 04148 1 589...

Page 213: ...37 RN55C4991F 4 99 K OHMS 1 MET FILM R38 RN55 00475 1 91637 RN55C47R5F 47 5 OHMS 1 MET FILM R39 RN55 21000 1 91637 RN55C1002F 10 K OHMS 1 MET FILM R40 RN55 00475 1 91637 RN55C47R5F 47 5 OHMS 1 MET FILM R41 RN55 14990 1 91637 RN55C4991F 4 99 K OHMS 1 MET FILM R42 RN55 27500 1 91637 RN55C7502F 75 0 K OHMS 1 MET FILM R43 RN55 21000 1 91637 RN55C1002F 10 K OHMS 1 MET FILM R44 RN57 21000 1 58900 RN57 2...

Page 214: ...MS 1 MET FILM R103 RN55 00475 1 91637 RN55C47R5F 47 5 OHMS 1 MET FILM R104 RN55 00750 1 91637 RN55CMF25T75E 75 0 OHMS 1 MET FILM R109 RN55 00365 1 91637 RN55C36R5F 36 5 OHMS 1 MET FILM R110 RN55 00365 1 91637 RN55C36R5F 36 5 OHMS 1 MET FILM R111 RN55 00475 1 91637 RN55C47R5F 47 5 OHMS 1 MET FILM R112 RAPK 31000 1 5Y491 67XR100K 100K 10 20T PC MNT R113 RAPK 21000 1 5Y491 67XR10K 10K 10 20T PC MNT R...

Page 215: ... 1 63345 330 100W TIN PLATE TEST JACK PIN TP2 ETT0 00001 1 63345 330 100W TIN PLATE TEST JACK PIN TP3 ETT0 00001 1 63345 330 100W TIN PLATE TEST JACK PIN TP4 ETT0 00001 1 63345 330 100W TIN PLATE TEST JACK PIN TP5 ETT0 00001 1 63345 330 100W TIN PLATE TEST JACK PIN TP6 ETT0 00001 1 63345 330 100W TIN PLATE TEST JACK PIN TP7 ETT0 00001 1 63345 330 100W TIN PLATE TEST JACK PIN TP8 ETT0 00001 1 63345...

Page 216: ...4LS221N 74LS221 MONOSTABLE SCHMT U18 UTN0 00744 1 01295 SN74F74N MC74F7AN 100MHZ DUAL D U19 UIN0 03845 1 66958 UC3845N UC3845 PWM CONTROLLER U21 UFN0 00358 1 58900 UFN0 00358 LM358 OP AMP U22 URC1 07812 1 04713 MC78T12CT MC78T12CT 3A 12V REG 20195 A00 PCB ASSY PRE WAVE FRT PNL INT Rev C Item Part Number Qty Cage Mfr s Part Number Description 1 20194 1 58900 20194 PC BOARD FR PNL INTERFACE 2 JSP0 1...

Page 217: ...100V RADIAL C67 CE00 R5471 1 55680 UVX2E4R7MTP 4 7 UF 250V RADIAL C68 CC51 04100 1 04222 SR205C 104KAA 1 UF CERAMIC X7R C70 CE00 R5471 1 55680 UVX2E4R7MTP 4 7 UF 250V RADIAL C71 CC51 04100 1 04222 SR205C 104KAA 1 UF CERAMIC X7R C72 CC51 04100 1 04222 SR205C 104KAA 1 UF CERAMIC X7R C73 CC51 04100 1 04222 SR205C 104KAA 1 UF CERAMIC X7R C74 CC50 03100 1 54583 RD30HX7R103K 01 UF CERAMIC X7R C75 CC51 0...

Page 218: ...F 1 K OHMS 1 MET FILM R62 RN55 31000 1 91637 RN55C1003F 100 K OHMS 1 MET FILM R63 RN55 31000 1 91637 RN55C1003F 100 K OHMS 1 MET FILM R64 RN55 21000 1 91637 RN55C1002F 10 K OHMS 1 MET FILM RP1 RM4S 00220 1 71450 750 83 R220 22 OHM X 4 SIP NETWORK RP2 RM4S 00220 1 71450 750 83 R220 22 OHM X 4 SIP NETWORK RP3 RM5S 11001 1 58900 RM5S 11001 1 KOHM X 5 SIP NETWORK RP4 RM5S 11001 1 58900 RM5S 11001 1 KO...

Page 219: ...25 1 28480 HLMP 1440 YELLOW LED CR8 ILYR 00125 1 28480 HLMP 1440 YELLOW LED CR9 ILYR 00125 1 28480 HLMP 1440 YELLOW LED CR10 ILYR 00125 1 28480 HLMP 1440 YELLOW LED S1 SPPL 22500 1 04426 39 22100 PUSH BUTTON SWITCH S2 SPPL 22500 1 04426 39 22100 PUSH BUTTON SWITCH S3 SPPL 22500 1 04426 39 22100 PUSH BUTTON SWITCH S4 SPPL 22500 1 04426 39 22100 PUSH BUTTON SWITCH S5 SPPL 22500 1 04426 39 22100 PUSH...

Page 220: ...100 PF CERAMIC NPO C16 CK50 01100 1 58900 CK50 01100 100 PF CERAMIC NPO C17 CK50 01100 1 58900 CK50 01100 100 PF CERAMIC NPO C18 CK50 01100 1 58900 CK50 01100 100 PF CERAMIC NPO C19 CK50 01100 1 58900 CK50 01100 100 PF CERAMIC NPO CR1 13618 1 58900 13618 DIODE uWAVE PIN SW 3PF 100ns CR10 13618 1 58900 13618 DIODE uWAVE PIN SW 3PF 100ns CR2 13618 1 58900 13618 DIODE uWAVE PIN SW 3PF 100ns CR4 13618...

Page 221: ...91637 RNC50H1001F 1 00 K OHMS 1 MET FILM R16 RN50 04990 1 58900 RN50 04990 499 OHMS 1 METAL FILM R20 RN50 11000 1 91637 RNC50H1001F 1 00 K OHMS 1 MET FILM R21 RN50 04990 1 58900 RN50 04990 499 OHMS 1 METAL FILM R23 RN50 11000 1 91637 RNC50H1001F 1 00 K OHMS 1 MET FILM R24 RN50 04990 1 58900 RN50 04990 499 OHMS 1 METAL FILM R30 RN50 11000 1 91637 RNC50H1001F 1 00 K OHMS 1 MET FILM R31 RN50 11000 1 ...

Page 222: ...ertino CA 95014 0JNR4 Dupont Eelectronics Customer Service Center 825 Old Trail Rd PO Box 80019 Wilmington DE 19880 0019 0KA21 Stetco Inc 3344 Schierhorn Ct Franklin Park IL 60131 00443 Waveline Inc 160 Passaic Ave West Caldwell NJ 07006 00656 Aerovox Inc 740 Belleville Ave New Bedford MA 02745 00750 Air Track Mfg Corp College Park MD 00809 Croven Crystals 500 Beech St Whitby Ontario CAN L1N5S5 00...

Page 223: ...a CA 93101 1Y147 Virtech 805 G University Ave Los Gatos CA 95030 11532 Teledyne Relays 12525 Daphne Ave Hawthorne CA 90250 11769 Elco Dyntech Div of Elco Corp 1225 East Wakeham Ave Santa Ana CA 92702 12020 Ovenaire Div of Electronic Tech 706 Forrest St Charlottesville VA 22901 12457 Merrimac Industries Inc 41 Fairfield Pl West Caldwell NJ 07006 13103 Thermalloy Co Inc 2021 W Valley View Lane PO Bo...

Page 224: ...River Hwy Grants Pass OR 97526 26066 Minnesota Mining and Mfg Co 3M Center St Paul MN 55101 26629 Frequency Sources Inc 16 Maple Rd Chelmsford MA 01824 26692 B and S Tool Die Company 2300 Sulphur Spring Rd Baltimore MD 21227 26922 Cetec Corp 9900 Baldwin Place El Monte CA 91731 26923 Control Master Products Inc 1062 Shary Circle Concord CA 94518 27014 National Semiconductor Corp 2900 Semiconductor...

Page 225: ...2063 Exar Integrated Systems 2222 Gume Dr PO Box 49007 San Jose CA 95161 9007 52072 Circuit Assembly Corp 18 Thomas St Irvine CA 92718 52648 Plessey Trading Corp 1641 Kaiser Ave Irvine CA 92714 52683 Baytron Co Inc 344 Salem St Medford MA 02155 52763 Stettner Electronics Inc 6135 Airways Blvd Chattanooga TN 37421 52840 Western Digital Corp 3128 Red Hill Ave Costa Mesa CA 92626 53387 Minnesota Mini...

Page 226: ...arda Microwave Corp 11040 White Rock Rd Suite 200 Rancho Cordova CA 95670 60644 CSDC PO Box 2116 Wayne NJ 07470 61104 Aris Engineering Corp 30 Bond St Haverhill MA 01830 61429 Fox Electronics Inc 5570 Enterprise Pky Ft Myers FL 33905 61485 Hitachi Denshi America Ltd 175 Crossways Park W Woodbury NY 11797 61529 Aromat Corp 629 Central Ave New Providence NJ 07974 61638 Advanced Interconnections 5 En...

Page 227: ...st 11th St Erie PA 16512 73138 Beckman Industrial 4141 Palm St Fullerton CA 92635 73734 Federal Screw Products Inc 3917 N Kedzie Ave Chicago IL 60618 3415 74840 Illinois Capacitor Inc 3757 W Touhy Ave Lincolnwood IL 60645 74970 Johnson E F Co 299 10th Ave South West Waseca MN 56093 75263 Keystone Carbon Co Inc 1935 State St St Marys PA 15857 75332 Kings Electronics Co Inc Brooklyn NY relocated see...

Page 228: ...p 711 Lidgerwood Ave Elizabeth NJ 07207 93459 Weinschel Engineering Co 1 Weinschel Lane Gaithersburg MD 20877 94696 Magnecraft 1910 Techny Rd Northbrook IL 60062 95054 Sermax Corp Milwaukee WI 95077 Solitron Devices Inc Solitron Microwave Div 1177 Blue Heron Blvd Bldg 2 Riviera Beach FL 33404 95146 Alco Electronics Products Inc 1551 Osgood St North Andover MA 01845 95275 Vitramon Inc Box 544 Bridg...

Page 229: ...rcuit Schematic 3 16686 H 8 19 A6 A7 Analog PC Assy 1 20741 M 8 22 A6 A7 Analog Circuit Schematic 3 20742 N 8 23 A8 Front Panel Interface PC Assy 1 20195 D 8 26 A8 Front Panel Interface Circuit Schematic 3 20196 E 8 27 A9 Front Panel PC Assy 1 20526 001 A 8 30 A9 Front Panel Circuit Schematic 1 20527 1 8 31 A12 1 GHz Calibrator Assy 1 20055 001 B 8 32 A12 1 GHz Calibrator Schematic 1 17097 K 8 33 ...

Page 230: ...Series 8500A Peak Power Meters 8 2 Manual No 20790 Rev C November 1998 ...

Page 231: ... end or included with some of the command keystroke sequences means to press any of the three units keys ms µs or ns to enter the values of the keyed sequence Numbers in parenthesis after a MENU or MEM key means to press the key that number of times to reach a specific menu level A 2 Commands Applicable to All Modes Function Command Sequence Auto Zero Detectors MENU 1 F3 F2 Calibrate Detectors MEN...

Page 232: ...Current Setup MEM 3 F1 Reinitialize All But Current Setup MEM 3 F2 Reinitialize a Numbered Setup nn MEM 3 F3 nn UNITS A 3 CW Mode Commands Function Command Sequence Select CW Mode CW CW Averaging MENU 2 F1 nnn UNITS Fast Analog Output MENU 10 F1 A 4 Peak Mode Commands Function Command Sequence Select Peak Mode PEAK Select 8501A Internal Trigger and Level MENU 1 F1 nn nn dBm mW Select 8502A Interna...

Page 233: ...bort Stop Plotting Activity MENU 6 F1 Enter Plotter GPIB Address MENU 6 F2 nn UNITS Set Initial Delay for Autoscaling normal PPM operation MENU 09 F2 nn nn UNITS Set Averaging Value for Autoscaling normal PPM operation MENU 09 F3 nnn UNITS Set Initial Delay for Autoscaling 1018B emulation operation MENU 11 F2 nn nn UNITS Set Averaging Value for Autoscaling 1018B emulation operation MENU 11 F3 nnn ...

Page 234: ...tages Move cursor to RISE TIME line on display nn n UNITS nn n UNITS Change Fall Time Start and End Percentages Move cursor to FALL TIME line on display nn n UNITS nn n UNITS A 5 4 Marker Sub Mode Commands Function Command Sequence Change Marker 1 Percentage Move cursor to MRKR 2 1 line on display snn n UNITS Change Marker 2 Percentage Move cursor to MRKR 3 2 line on display snn n UNITS Change Mar...

Page 235: ...od 1 of the Peak Power Measurements in Chapter 6 A 6 3 Other Dual Channel Commands Detector Offset Channel B MENU 3 F2 nn nn dB Display Ratio A B Power Mode MENU 7 F2 Select Peak Mode for Channel A A F1 when using the Ratio Mode Select CW Mode for Channel A A F2 when using the Ratio Mode Select Peak Mode for Channel B B F1 when using the Ratio Mode Select CW Mode for Channel B B F2 when using the ...

Page 236: ...Series 8500A Peak Power Meters A 6 Manual No 20790 Rev C November 1998 ...

Page 237: ... Two levels of menu displays are available The first level includes menus for normal 8500A functions The second level are the menus used during 1018B emulation MENU 8 in the normal mode enables or toggles the 1018B Emulation mode B 2 MENU Key Displays B 2 1 Normal 8500A Functions Keystrokes Menu Displayed MENU 1 Menu NEXT MENU F1 set Int Trig and Level F2 set Extrn Trigger F3 to Cal or Zero Detect...

Page 238: ...01A MENU 8 Menu NEXT MENU Minus PREV MENU F2 Emulate 1018B MENU 9 Menu NEXT MENU Minus PREV MENU F1 to Program Detector PROM F2 to Set Initial Dly Value for Autoscaling F3 to Set Averaging Value for Autoscaling NOTE The MENU 9 F1 function is designed to be used only in conjunction with the Giga tronics PROM Programming Accessory Kit If F1 is pressed without any requirement for using the PROM progr...

Page 239: ...OTE Pressing MENU 8 F1 and then MENU 8 again will enable SRQ other SUB MENU 8 items remain the same Pressing MENU 8 F2 and then MENU 8 again will change Automatic Trigger to Bus Command in SUB MENU 8 All other SUB MENU 8 commands remain the same MENU 9 Menu NEXT MENU Minus PREV MENU Current Range Value is X F1 for Range 1 XXX X µW F2 for Range 2 XX XX mW F3 for Range 3 X XXX mW MENU 10 Press CLEAR...

Page 240: ...ns F1 to Recall Setups F2 to Store Setups F3 to get Power On Setup MEM 2 Press CLEAR to return to data display F1 to Display Current Setup F2 to Display Power On Setup F3 to Display a Numbered Setup MEM 3 Press CLEAR to return to data display F1 to Initialize the Current Setup F2 to Initialize All but Current Setup F3 to Initialize a Numbered Setup Series 8500A Peak Power Meters B 4 Manual No 2079...

Page 241: ... display Darkened keys in the following illustrations will be turned on to produce the corresponding display at the left C 2 Data Displays MODE DATA DISPLAY MODEL 8501A MODEL 8502A CHANNEL A CW MODE CHANNEL A PEAK MODE CHANNEL A GRAPH MODE Model 8502A channel B displays are same as above except with the B key turned on and B shown on the display DUAL CHANNEL CW MODE NA Manual No 20790 Rev C Novemb...

Page 242: ...pes of signals to each other the indication in the lower right corner would be A Peak B CW PK CW Both A B CW CW CW A CW B Peak CW PK ANY MODE Error Indicated Display Blank or Frozen No Trigger Occurring Ready ON New Data OFF Ready ON New Data OFF SELECT A OR B CHANNEL NA OR Series 8500A Peak Power Meters C 2 Manual No 20790 Rev C November 1998 ...

Page 243: ...atically calculated and stored in non volatile RAM so that the detectors will remain calibrated when the PPM is turned off and back on again This process takes less than a minute and can be performed at any time The detectors are either high or low speed The high speed has a rise time of 15 ns and a minimum frequency of 750 MHz for accurate measurements The low speed detector has a rise time of 75...

Page 244: ... 30 MHz to 18 5 GHz 20 dBm to 20 dBm Pulse 40 dBm to 20 dBm CW 23 dBm 200 mW Damage Limit 1 12 30 MHz to 2 GHz 1 22 2 to 12 4 GHz 1 37 12 4 to 18 GHz Type N m 16935 30 MHz to 18 5 GHz 20 dBm to 20 dBm Pulse 40 dBm to 20 dBm CW 23 dBm 200 mW Damage Limit 1 12 30 MHz to 2 GHz 1 22 2 to 12 4 GHz 1 37 12 4 to 18 GHz APC 7 mm 17267 30 MHz to 26 5 GHz 20 dBm to 20 dBm Pulse 40 dBm to 20 dBm CW 23 dBm 20...

Page 245: ...to 40 GHz 10 dB 1 92 Calibration Factor Uncertainty Frequency Sum of Uncertainties 1 Probable Uncertainties 2 Below 10 GHz 2 6 1 2 10 to 18 GHz 6 4 3 7 18 to 26 5 GHz 10 6 5 26 5 to 40 GHz 20 10 NOTES 1 Includes uncertainty of reference standard and transfer uncertainty Directly traceable to NIST formerly NBS 2 Square root of the sum of the individual uncertainties squared RSS RF Detectors Manual ...

Page 246: ... by Q1 and Q2 The gain of the first stage is set by the ratio of R34 and R33 to R11 R9 and C3 provide adjustments to optimize the step response of the amplifier U1 is a low offset and low bandwidth op amp that provides the DC signal path by controlling the current through Q6 The second stage of the amplifier is formed by Q7 through Q10 Q9 and Q10 provide a constant current source for the second st...

Page 247: ...Figure D 2 Pre Amplifier Line Driver Schematic RF Detectors Manual No 20790 Rev C November 1998 D 5 ...

Page 248: ... it with the 12 bit counter U1 The PROM cannot be erased If the response data changes the PROM must be removed and replaced with a new one It must be programmed externally since the PPM by itself has no programming ability However Giga tronics offers an optional PROM Programmer Accessory Kit 16976 which works in conjunction with the PPM to reprogram the PROM The thermistor RT1 measures the tempera...

Page 249: ... taken at the emitter of the output transistor not at the output end of the 75 Ω resistor that feeds the coax cable The PROM and address counter circuit is very reliable but in the event that it does fail the PPM will be unable to correctly read the PROM and an error message to that effect will be displayed The most likely failure in that case would be a broken wire in the cable or in the connecto...

Page 250: ...cs Programming Accessory Kit P N 16976 is on hand to program a new PROM with the characteristics of the new element and if the required equipment for measuring Cal Factor is available If either or both of the above items are not available the entire detector should be returned to the factory for element replacement The Cal Factor is the frequency response of the detector with respect to the 1 GHz ...

Page 251: ... has been installed it may be necessary to readjust the pulse response of the amplifier due to a possible difference in the video resistance of the new element diodes in relationship to the old element diodes To adjust the pulse response connect the detector to a pulsed microwave source of about 0 dBm The pulse must be very clean as this procedure assumes a perfect input pulse The rise time of the...

Page 252: ...Figure D 4 Detector Disassembly and Assembly Details Series 8500A Peak Power Meters D 10 Manual No 20790 Rev C November 1998 ...

Page 253: ... 1 12678 002 1 58900 12678 002 SLIDE RACK SECTIONS PAIR 2 12678 001 1 58900 12678 001 SLIDE CHASSIS SECTION PAIR 3 10351 001 2 58900 10351 001 ROUND NICKEL HANDLE 4 20077 1 58900 20077 BRACKET RACK MOUNT 5 25 L 5 20078 1 58900 20078 BRACKET RACK MOUNT 5 25 R 6 10352 4 58900 10352 HANDLE FERRULE 7 13854 6 58900 13854 SPACER 172IDX 500ODX 31LG 8 20074 1 58900 20074 MOUNTING BLOCK LEFT 9 20075 1 5890...

Page 254: ...R 4 20508 002 1 58900 20508 002 FRONT PANEL 8501A OPT 03 5 16884 1 58900 16884 LABEL MISC 20795 MODEL 8502A OPTION 03 Rev B Item Part Number Qty Cage Mfr s Part Number Description 1 20510 002 1 58900 20510 002 FRONT PANEL 8502A OPT03 2 17051 001 2 58900 17051 001 DET INPUT CABLE ASSY OPT 03 3 17283 1 58900 17283 BRACKET CLAMP DET INPUT CABLE 4 16884 1 58900 16884 LABEL MISC 5 10414 001 1 2R182 864...

Page 255: ...p battery circuit 4 11 C CAGE List of Manufacturers 7 36 Calibration Self Calibration Procedure 2 14 Calibration and Testing 5 1 A8 Front panel interface board 5 12 Analog output accuracy test 5 7 Calibrator output level test 5 3 Calibrator return loss test 5 3 Delay accuracy test 5 6 Detector return loss test 5 7 Equipment Required 5 2 Initialization 5 12 Instrument plus power detector linearity ...

Page 256: ...3 18 Detector PROM correction User supplied frequency 3 17 Detector return loss test 5 7 Detector Specifications D 2 Detectors D 1 Disassembly D 8 Electrical Description D 4 Maintenance D 7 Preamplifier PC assembly D 4 PROM PC assembly D 6 Reassembly D 9 Replacement of detector element D 8 Specifications D 2 Troubleshooting D 7 Diagrams 8 1 Digital delay PC assembly A5 4 12 A5 Test points 4 19 Clo...

Page 257: ...5 Marker sub mode commands A 5 Pulse sub mode commands A 5 Graph mode GPIB operation 3 24 Automatic functions of the Graph mode 3 24 Automatic window delay selection related commands 2 24 3 26 Graph sub mode selection commands 3 24 Reading and defining pulse parameters 3 25 Graph sub mode selection commands 3 24 H Hide and Unhide frequency information commands 3 15 High Power Measurement Procedure...

Page 258: ...Mory Key Displays B 4 Menu and Memory Keys B 1 MENU Key Displays B 1 1018B emulation mode functions B 3 Normal 8500A functions B 1 Mode Selection 2 11 CW mode 2 11 Graph Mode 2 13 Peak mode 2 11 Mode selection and control 3 21 Peak power commands 3 21 Related peak power commands 3 22 Select Log or Linear power measurement format commands 3 21 Select measurement mode commands 3 21 N Non Volatile Me...

Page 259: ... and possible causes 6 4 Power on self test 2 10 PPM IEEE bus functions 3 2 PPM stand alone plot operation 3 43 Procedure for making plots 2 30 Programming notes 3 35 PROM frequency correction 2 16 External frequency 2 16 User supplied frequency 2 16 Pulse parameters sub mode functions 2 26 Pulse rise time width and fall time 2 26 Pulse rise time width and fall time 2 26 Pulse shaper 4 18 Pulse su...

Page 260: ...oting 6 3 Service Requests 3 36 Error conditions 3 37 Single pulse measurement using external trigger 2 41 Single pulse measurement using internal trigger 2 40 Single pulse measurements 2 40 Special Capabilities of the PPM 2 40 Reference delay 2 40 SRQ related commands 3 16 Stand alone plot output mode 3 10 Start delay 2 24 Status byte 3 10 Status Code Decimal Values 3 41 Store or recall setup com...

Page 261: ...Equipment required 6 3 Power On failure 6 3 Self test failure indications and possible causes 6 4 Two detectors 3 39 U Unbuffered memory 4 10 Update data continuously output mode 3 7 Update trigger reset output mode 3 5 User defined detector calibration factor commands 3 20 User supplied cal factor 2 17 Offset 2 17 User supplied frequency 2 16 V Voltage hold 4 17 Voltage proportional to frequency ...

Page 262: ...Series 8500A Peak Power Meters Index 8 Manual No 20790 Rev C November 1998 ...

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