Assembly Adjusted; Related Performance Tests; Description - Agilent Technologies 8564EC Service Manual

Spectrum analyzers

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. DC Log Ampliﬁer Adjustments

There are three DC log adjustments; limiter phase, linear ﬁdelity, and

log ﬁdelity.

Assembly Adjusted

A4 log amp/cal oscillator

IF Gain Uncertainty Scale Fidelity

These three adjustment need only be done under the following

Limiter phase Only if a repair is made to blocks F, G, H, I, or J.

Linear ﬁdelity Only if a repair is made to blocks C, D, F, G, H, I, J, K,

O, IF gain accuracy, RBW switching, or log ﬁdelity.

Only if a repair is made to blocks D, F, H, K, IF gain

accuracy, RBW switching, or log ﬁdelity.

If multiple adjustments are required they should be done in the

following order:

1. Limiter Phase

2. Linear Fidelity

3. Log Fidelity

Manual Adjustment Procedures: 3335A Source not Available

3a . DC Log Ampliﬁer Adjustments

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