Service manual

Introduction 1
Agilent 8495D/K Attenuators Operating and Service Manual 11
Figure 1 8495K Programmable Four-Section Attenuator Schematic Diagram
In the 8495K, each solenoid requires a drive of 20 V to 30 V. The
switching current is approximately 125 mA at 24 Vdc per section
for the 8495K. The solenoid switching time is less than
20 milliseconds including settling time. Once switched, the solenoid
plungers are held in place by permanent magnets and the solenoid
plungers automatically disconnect the selected coil drive and
connect the opposite coil drive (see Figure 1 on page 11 and
Figure 3 on page 14).
From
solenoid
driver
circuits
Thru line
Attenuator card
10 dB
+24 Vdc
RF input
RF
output
Thru line
Attenuator card
20 dB
Thru line
Attenuator card
20 dB
Thru line
Attenuator card
20 dB
Wire
color
code