AC Flatness Adjustment Procedure - 250 kHz Filter

Description

This procedure adjusts the AC calibration constants for the 250 kHz filter. The AC Flatness Test for the 250 kHz filter (see Chapter 2) is performed with AC corrections disabled. The results are used to calculate new calibration constants, which are then transferred to non-volatile memory.

Preliminary Procedure

•Perform a complete autocalibration on the DMM (unless an autocal has been performed within the last 24 hours).

•Determine the calibration constants by performing Test 2-5 (see 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

NOTE

1.Disable calibration security on the AFG:

CAL:SEC:STAT OFF, <security code>

Cal security off

where <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.Transfer the calibration constants to the AFG in arbitrary block data format:

CAL:DATA:AC1 <data >

Transfer cal constants

See SUB Adj_flat in the example program to see how step 3 is performed in Agilent BASIC.

Example Program

An example program that performs the AC flatness adjustment procedures for both filters is listed following the AC flatness adjustment procedure for the 10 MHz filter.

Agilent E1445A Service Manual

Adjustments 93

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Agilent Technologies E1445A AC Flatness Adjustment Procedure 250 kHz Filter, Disable calibration security on the AFG
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75000 Series C, E1445A specifications

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