Adjust Dc Calibration - Tektronix DSA8300 Service Manual

Adjust DC calibration

DSA8300 Digital Serial Analyzer and Modules Service Manual
1. Use the equipment connection shown in the preceding figure.
2. Verify communication between the controller and DSA8300 by entering the
following GPIB command:
*IDN
The instrument should respond with Tektronix and Firmware Version
information.
3. Turn off the DSA8300 cal constant protection by entering the following GPIB
command:
SYST:PROT OFF
4. Set the DSA8300 DC calibrator offset cal constant to 0 by entering the
following GPIB command:
CALCOMP:DOUBLE "DcCalOffsetAdj",0.0
5. Wait 8 seconds, and then set the instrument DC calibrator Lsb cal constant to
1.0 by entering the following GPIB command:
CALCOMP:DOUBLE "DcCalLsbAdj",1.0
6. Wait 8 seconds, and then set the instrument DC calibrator output to 0 Volts by
entering the following GPIB command:
CALIBRATE:DCCALIBRATOR 0.0
7. Record the DMM reading.
8. Set the instrument DC calibrator offset cal constant to -1 * DMM reading by
entering the following GPIB command:
CALCOMP:DOUBLE "DcCalOffsetAdj",(-1.0 * the DMM reading)
Example:
CALCOMP:DOUBLE "DcCalOffsetAdj", 3.2e-4
9. Set the instrument calibrator to 1.0 V by entering the following GPIB
command:
CALIBRATE:DCCALIBRATOR 1.0
10. Record the DMM reading (reading1).
11. Set the instrument calibrator to -1.0 V by entering the following GPIB
command:
CALIBRATE:DCCALIBRATOR -1.0
12. Record the DMM reading (reading2).
13. Calculate the cal constant using the following equation: (–1.0 * Reading2
+ Reading1) ÷ 2.
14. Set the instrument calibrator Lsb cal constant by entering the following GPIB
command:
CALCOMP:DOUBLE "DcCalLsbAdj", (cal constant calculated
in previous step)
Adjustment procedures
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