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4 8494/95/96G/H Operating And Service Manual
Overview
Table 3 8496G/H Attenuator Switching Order
Each solenoid requires a drive of 20 to 30 V with a switching current of
approximately 125 mA
*
at 24 V dc per section. 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 and Figure 2). This simplifies the coil driver
circuit design and reduces the amount of heat dissipated by the solenoid
coils since the solenoid coils are energized only for the 20 milliseconds
switching time.
8496G/H
Attenuator Sections
Atten
(dB)
1
10 dB
2
20 dB
3
40 dB
4
40 dB
0
10 X
20 X
30 X X
40 X
50 X X
60 X X
70XXX
80 X X
90 X X X
100 X X X
110XXXX
* For serial number prefixes below 1722A, change 125 mA to 110 mA.