Step Attenuator Flatness Adjustment - Agilent Technologies 83620A Service Manual

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AUTOMATED ADJUSTME TS

1. Step Attenuator Flatness Adjustment

Calibration for Option 001
Before doing any adjustment, enter the password for access to the adjustment
calibration constants. Use the front panel or the front panel emulation program
provided with this software.
See Chapter 4 for information on enabling the calibration constants with the
password.
Description
A power meter is used to make relative power measurements to determine
the actual attenuation of each attenuator card. Mismatch error is minimized
by including a xed attenuation in front of the card being measured for both
parts of the relative measurement (with/without the card). he software uses
the value of each attenuator card to calculate what the actual attenuation is
when set to a speci c value. For example, the attenuator value for the 30 dB
setting is the sum of the 10 dB and the 20 dB cards. he e ect of digital ALC
correction is accounted for by the software.
he following test equipment is required for this adjustment. No substitutions
are allowed.
5-12 Automated Tests HP 8360