Maintenance
6-26 2715 Spectrum Analyzer Service Manual
Use the following procedure to replacethe 1st LO Assembly:
NOTE. Replacement of this assembly requirescompletion of the. Amplitude
Flatness Adjustment Procedure on Page 5-- 52.
1. Remove the instrument from its cabinet(see Removing the Instrument from
its Cabinet on Page 6--17).
2. Remove the RF Deck from th e Spectrum Analyzer (see Replacing the RF
Deck on Page 6--23).
3. Disconnect P100 from the 1st LO BufferAmplifier (semi rigid cable from
the 1st LO assembly to the 1st LO Buffer Amplifier).
4. Remove the 1st LO assembly from the RF deck.
Replace the 1st LO assembly by reversingthe removal procedure.
Use the following procedure to replacethe S tep Attenuator:
NOTE. Replacement of this assembly requirescompletion of the. Amplitude
Flatness Adjustment Procedure on Page 5-- 52.
1. Remove the instrument from its cabinet(see Removing the Instrument from
its Cabinet on Page 6--17).
2. Disconnect P210 from the Step Attenuator.This is a multipin plug on the top
side of the RF Deck.
3. Disconnect P100, P200, and P150 (Figure 6-- 8 on Page 6--24) from the Step
Attenuator.
4. Remove the nuts and washers fromJ100, J150, J200, and J250 on the Step
Attenuator.
5. Remove the Step Attenuator.
Replace the Step Attenuator by reversingthe removal procedure.
Replacing the 1st LO
Assembly
Replacing the StepAttenuator