HP E1563A User Manual page 159

Caution
Caution
Adjustment
Programs
Zero Adjustment
Caution
Note
ORDER OF ADJUSTMENTS REQUIREMENT
Range adjustments MUST be performed in the order given in
the adjustment table. An accurate range adjustment requires
the range adjustments prior to the one in progress be within
specification.
ZERO ADJUSTMENT REQUIREMENT
The zero adjustment must be a recent adjustment prior to
performing the gain adjustments. It is recommended you
perform the zero adjustment one time just before performing
the gain adjustments.
The driver CD received with this module contains calibration and
performance verification program source code written in ANSI C.
Calibration programs are E1563CAL.C and E1564CAL.C. Performance
verification programs are E1563VER.C and E1564VER.C.
This procedure sets the zero calibration constants for each digitizer range.
The digitizer calculates a new offset correction constant for the current range
when the CALibration:ZERO[< channel >] command is executed. The
digitizer calculates a new set of offset correction constants for all ranges of
a channel when the CALibration:ZERO[< channel >]:ALL? command is
executed. The digitizer will sequence through all ranges automatically and
calculate new zero offset calibration constants automatically.
1. Reset the Digitizer by executing a *RST command.
2. Switch the internal short across each channel's input by executing the
DIAG:SHORt<channel> command for all channels e.g.,
DIAG:SHOR1; DIAG:SHOR2; etc.
3. Send the CAL:VAL 0 input CALibration value command.
4. Perform the adjustment by sending the CAL:ZERO<channel>:ALL?
command once for each channel and reading the calibration success
result (a non-zero response indicates a calibration error occurred).
Do not remove power from the mainframe during the digitizer's
Zero Adjustment. You may lose ALL calibration memory if
power is removed while the digitizer is adjusting.
The zero adjustment procedure takes about 20 seconds per channel to
calculate new zero offset cal constants for all ranges of the channel.
HP E1563A and E1564A Adjustments 159