58452 VXIbus Universal Power Meter
4-6 Publication 21555, Rev. E, September 2002
GOSUB MKCS ! CONVERT THE NEW DATA
GOSUB SENDIT ! SEND TO DUT (did it understand and execute properly?)
C$ = *ESR?
GOSUB SENDIT
GOSUB DAT:PRINT EVENT STATUS IS:;R$ ! MUST BE 0
GOSUB MEAS ! VERIFY THAT THE POWER OUTPUT IS NOW CORRECT
END
MKCS: ! CONVERT THE ARRAY TO A STRING OF COMMA SEPARATED
VALUES
C$ = DIAG:CAL:EEPROM
FOR | = 1 TO 8:C$=C$+B$[|]:IF | <8 THEN C$=C$+,:NEXT |
C$=C$+,000000 ! APPEND THE DEFAULT PASSWORD
PRINT:PRINT EEPROM DATA:;C$
RETURN
MEAS:
C$ = OUTP:ROSC ON ! Turn on the Calibrator
GOSUB SENDIT
INPUT Enter the power output in mW;m ! Enter the measured power here either by a call to a
! subroutine or from the keyboard
CF = 100/m:print The power is;m
C$ = OUTP:ROSC OFF
GOSUB SENDIT ! Turn off the calibrator
Return
The sensor(s) can now be calibrated by connecting to the calibrator output and entering the command
CAL1 (or 2). If the calibration does not complete satisfactorily, refer to the calibrator voltage and
frequency checks starting in Section4.3.3.
The Linearity test can now be performed as described in Section4.4.2. This is a complete procedure and
must be performed in the exact order given to produce accurate results. If this test fails, try it again with
a different sensor. If it still fails, refer to the calibrator voltage and frequency checks in Section4.3.3.
The following tests require that the power meter side cover be removed. Remove the two flat head
screws from the right side cover and slide the cover about
1
/
4
inch to the rear and lift it off.
The same test equipment that was used for the Performance Verification Tests can be used for these
tests.
Refer to the Analog PC Board description in Section3.3 for further help in defining the problem. If the
fault cannot be located to the component level, the PC board can be removed and replaced with a
different one with no further calibration required except to set the calibrator output power to 0dBm.
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