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Appendix G: Calibration
G–14
VX4101A MultiPaq Instrument User Manual
NOTE. For the ARM calibrations, the input should be connected to the SMB
connector.
For the channel 3 (factory) calibrations, the input should be connected to the
SMA Connector, if this option is included.
Determining Status. To determine the status of a calibration command, do the
following:
1. Issue the following query:
STATus:OPERation:CONDition?
NOTE. Bit 0 in the response data indicates the following:
Bit 0 = 0 Indicates that the calibration command is complete
Bit 0 = 1 Indicates that the calibration is in progress
2. You can issue the following query to determine if there was a failure in the
calibration:
SYSTem:ERRor?
NOTE. When polling the cards for calibration complete, it is recommended that
the polling period be greater than 1 ms to minimize the overhead incurred for
processing the query while the calibration is in progress. An alternative method
to eliminate the polling overhead is to program the card to generate an SRQ
(service request) interrupt when the calibration bit (described above) changes
from a 1 to a 0
About the Adjustment Procedures. The individual channel adjustments detailed in
Step Two below should be performed in the sequence in which they appear for
the channel 1 and channel 2 inputs of the Counter. Once these steps have been
performed, the command function and cross channel calibrations steps in Step
Three should be executed.
To initialize the instrument and prepare it for adjustment, do the following:
1. Send the following command to select the counter function of the VX4101A:
INSTrument:SELect COUNTER
Step One: Initialize the
instrument