186 Chapter 2a
Making Adjustments: If 3335A Source Not Available
7a. Log and Linear Amplifier
7a. Log and Linear Amplifier
This adjustment applies to:
All 8590 E-Series and L-Series spectrum analyzers
8591C cable TV analyzers
8594Q QAM analyzers
A 21.4 MHz signal is injected into an IF test board that has been
inserted in place of the first resolution bandwidth assembly, A11. The
gain of the A14 log amplifier assembly is adjusted by observing the
voltage at the AUX VIDEO OUT on the rear panel with a digital
multimeter.
Equipment Required
Synthesized signal generator
Digital multimeter (DMM)
IF test board
Cable, BNC, 120 cm (48 in)
Cable, BNC (f) to dual banana plug
Test cable BNC (m) to SMB (f)
Adapter tip FN (m) to BNC (f)
10 dB step attenuator (8496 A/G)
Attenuator/switch driver (if programmable step attenuators are
used)
Attenuator interconnect kit
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