Agilent Technologies 8590 Series Service Manual page 292

Troubleshooting the RF Section
6b. 8592L/94L, 8594Q, and 8593E/94E/95E/96E
Table 6-11 Input Attenuator Control Output at A7J5 for 8594E,
8594L, 8594Q, 8595E, 8596E
Attenuator
Setting (dB) Pin 2
0 H
10 L
20 H
30 L
40 H
50 L
60 H
70 L
Blocking —
Capacitor In
Blocking —
Capacitor Out
H = 0 V (A floating output if the attenuator is disconnected.)
L = −15 V (A low at pin 2, 9, or 8 indicates that the attenuator step is in
the signal path. A low at pin 7 indicates the blocking capacitor is the signal path.)
292
10 dB 40 dB
Step Step
Pin 1 Pin 9
L H
H H
L H
H H
L L
H L
L L
H L
— —
— —
H = −10 V (with the attenuator connected at A7J5)
20 dB
Step
Pin 4 Pin 8 Pin 5
L H L
L H L
L L H
L L H
H H L
H H L
H L H
H L H
— — —
— — —
Blocking
Capacitor
Pin 7 Pin 6
— —
— —
— —
— —
— —
— —
— —
— —
L H
H L
Chapter 6