Instruction manual
iii
3.7.2. MESSAGE FORMAT .....................................................................................................................................57
3.7.3. NUMERIC DATA FIELD...............................................................................................................................60
3.7.4. PROGRAM HEADERS..................................................................................................................................60
3.7.5. OUTPUT PROGRAMMING..........................................................................................................................65
3.7.5.1. OUTPUT VOLTAGE AMPLITUDE (AMP)............................................................................................................65
3.7.5.2. FREQUENCY (FRQ)................................................................................................................................................65
3.7.5.3. PHASE ANGLE (PHZ).............................................................................................................................................65
3.7.5.4. CURRENT LIMIT (CRL) .........................................................................................................................................66
3.7.5.5. RAMP OR STEP OPERATIONS .............................................................................................................................66
3.7.5.6. EXTERNAL SYNCHRONIZATION (SNC)............................................................................................................67
3.7.5.7. DROP CYCLE (DRP)...............................................................................................................................................68
3.7.5.8. CALIBRATION (CAL).............................................................................................................................................68
3.7.5.9. TO PROGRAM A REGISTER (REG)......................................................................................................................69
3.7.5.10. TO RECALL A REGISTER (REC) ........................................................................................................................69
3.7.5.11. VOLTAGE RANGE (RNG)....................................................................................................................................70
3.7.5.12. TO TRIGGER AN OPERATION (TRG)................................................................................................................70
3.7.5.13. TO PROGRAM THE DEFAULT FREQUENCY (FLM A) ...................................................................................70
3.7.5.14. TO PROGRAM THE DEFAULT OUTPUT VOLTAGE (INI A)...........................................................................71
3.7.5.15. DEFAULT CURRENT LIMIT (INI C)...................................................................................................................71
3.7.5.16. 1 OR 3 PHASE MODE (MOD) ..............................................................................................................................71
3.7.5.17. TO TALK (TLK) MEASURED AND PROGRAMMED DATA............................................................................72
3.7.5.18. TO TALK THE MEASURED OUTPUT VOLTAGE (TLK VLT).........................................................................72
3.7.5.19. TO TALK THE MEASURED OUTPUT CURRENT (TLK CUR).........................................................................72
3.7.5.20. TO TALK THE MEASURED OUTPUT POWER (TLK PWR).............................................................................73
3.7.5.21. TO TALK THE MEASURED OUTPUT POWER FACTOR (TLK PWF).............................................................73
3.7.5.22. TO TALK THE MEASURED OUTPUT APPARENT POWER (TLK APW).......................................................73
3.7.5.23. TO TALK THE MEASURED OUTPUT FREQUENCY (TLK FQM)...................................................................73
3.7.5.24. TO TALK THE MEASURED OUTPUT PHASE ANGLE (TLK PZM) ................................................................74
3.7.5.25. MESSAGE SEPARATORS ....................................................................................................................................78
3.7.5.26. SERVICE REQUEST .............................................................................................................................................78
3.7.5.27. SERIAL POLL STATUS BYTE.............................................................................................................................78
3.7.5.28. END OF STRING ...................................................................................................................................................79
3.7.5.29. ERROR MESSAGES..............................................................................................................................................79
3.7.5.30. TO OPEN (OPN) AND CLOSE (CLS) THE OUTPUT RELAY (Optional)..........................................................79
3.7.6. GROUP EXECUTE TRIGGER......................................................................................................................79
4. CALIBRATION PROCEDURE...........................................................................................................................83
4.1. GENERAL............................................................................................................................................................83
4.2. TEST EQUIPMENT.............................................................................................................................................85
4.3. PERIODIC CALIBRATION ................................................................................................................................89
4.3.1. VOLTAGE CALIBRATION............................................................................................................................89
4.3.2. VOLTAGE MEASUREMENT CALIBRATION...............................................................................................89
4.3.3. CURRENT MEASUREMENT CALIBRATION ..............................................................................................92
4.3.4. POWER MEASUREMENT CALIBRATION...................................................................................................93
4.3.5. REMOTE MEASUREMENT CALIBRATION ................................................................................................94
4.3.6. REMOTE OUTPUT VOLTAGE CALIBRATION...........................................................................................94
4.4. NONPERIODIC CALIBRATION........................................................................................................................97
4.4.1. OUTPUT FREQUENCY CALIBRATION......................................................................................................97
4.4.2. GAIN ADJUSTMENT ....................................................................................................................................97
4.4.3. OUTPUT PHASE ANGLE CALIBRATION ...................................................................................................98
5. THEORY OF OPERATION.................................................................................................................................99
5.1. GENERAL............................................................................................................................................................99
5.2. OVERALL DESCRIPTION.................................................................................................................................99
5.3. OSCILLATOR ASSEMBLY................................................................................................................................99
5.4. CPU/GPIB BOARD ...........................................................................................................................................102
5.5. PHASE A/REF BOARD.....................................................................................................................................102