6A. Cal Attenuator Error - Agilent Technologies 8590 Series Service Manual

6a. Cal Attenuator Error

This adjustment applies to:
All 8590 E-Series and L-Series spectrum analyzers
8591C cable TV analyzers
8594Q QAM analyzers
The A12 amplitude control assembly has one 10 dB and two 20 dB
nonadjustable amplifiers. It also has 1 dB, 2 dB, 4 dB, 8 dB, and 16 dB
attenuators which are correctable. The 16 dB step is not used at this
time.
The attenuator error correction procedure involves determining the
1 dB step attenuator errors, disabling the attenuator correction
constants, determining the attenuator step errors and entering the new
correction constants into the analyzer memory.
Equipment Required
Synthesized Signal generator 8663A
1 dB step attenuator 8494G
Attenuator/switch driver (if programmable step attenuators are
used) 11713A
Cable, Type-N 152 cm (60 in)
Cable, BNC, 122 cm (48 in)
Attenuator interconnect kit
Adapter, Type N (m) to BNC (f)
Additional Equipment for 75 Ω Input
Pad, minimum loss
Adapter, Type-N (f) to BNC (m), 75 Ω
Chapter 2a
Making Adjustments: If 3335A Source Not Available
6a. Cal Attenuator Error
179