AC Flatness Adjustment Procedure - 10 MHz FilterDescription
This procedure adjusts the AC calibratio n co nstants for the 10 MHz filter.
The AC Flatness Test for the 10 MHz filter (see Ch apter 2) is performed
with AC correc t i o ns disabled. The results are used to calculate ne w
calibration constants, which are then transferred to non-volatile memory.
Preliminary Procedure
•Perform a complete autocalibration on the DMM (unl es s an
autocal has been performed within the last 24 ho urs) .
•Follow the manufacturer’s instruc tions for calibrating the Power
Meter and correcting for the Power Sensor.
•Determine the calibration constants by performing Te st 2-6 ( se e
Chapter 2), with the following modification: After resetting the
AFG (step 1), turn off AC corrections using the CAL:STAT:AC
OFF command.
Adjustment Procedure
1. Disable calibration security on the AFG:
CAL:SEC:STAT OFF, <security code> Cal security off
where <security code> is the AFG’s security code (factory-set to
"E1445A").
2. Verify that the calibration constants determined in the Preliminary
Procedure are acceptable (see SUB Valid_cons in the example
program).
3. If the firmware revision is A.02.00 or higher (use the *IDN?
command to determine the firmware revision), transfer the two
constants (4 and 25000) that determine the frequenci es to be
calibrated:
CAL:DATA:FILT <data>
NOTE See SUB Load_magic_num in the example program to see how step 3 is
performed in Agilent BASIC.