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Calibration
Remote Calibration15
15-5
CAL 52 CH4 Sum offset Adjust for 0 V ±5 mV
CAL 53 CH4 SCM level at full-scale Adjust for 5 V ±5 mV
CAL 54 CH4 AM level at full-scale Adjust for 10 V ±10 mV
CAL 55 Clock calibrate Adjust for 10·00000 MHz at SYNC OUT.
Remote Calibration
Calibration of the instrument may be performed over the RS232 or GPIB interface. To
completely automate the process the DVM and frequency meter will also need to be
remotely controlled and the controller will need to run a calibration program specific to
this instrument.
The remote calibration commands allow a simplified version of
manual calibration to be
performed by issuing commands from the controller. The controller must send the
CALADJ command repeatedly and read the DVM or frequency meter until the required
result for the select
ed calibration step is achieved. The CALSTEP command is then
issued to acce
pt the new value and move to the next step.
While in remote calibration mode very little error checking is perform
ed and it is the
controller's responsibility to ensure that everything progresses correctly. Only the
following commands should be used during calibration.
Important note
Using any other commands while in calibration mode may give
unpredictable
results and could cause the instrument to lock up, requiring
the power to be cycled to regain control.
CALIBRATION <cpd>
[,nrf]
The calibration control command. <cpd> can be one
of three sub-commands:
START Enter calibration mode; this command must be issued
before any
other calibration commands will be
recognized.
SAVE Finish calibration, save the new values and exit
calibration mode.
ABORT Finish calibration, do not save the new values and exit
calibration mode.
<nrf> represents the calibration password.
The password is only
required with
CALIBRATION START and then only if a non-zero
password has
been set from the instrument’s keyboard.
The password will be ignored, and will give no errors, at
all other times.
It is not possible to set or change the password using
re
mote commands.
CALADJ <nrf> Adjust the selected calibration value by <nrf>. The
value
must be in the range -100 to +100.
Once an adjustment has been completed and the new
value is as required the CALSTEP
command must be
issued for the new value to be accepted.
CALSTEP Step to the next calibration point.
1.888.610.7664 sales@GlobalTestSupply.com
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