Agilent Technologies 34945A, Руководство пользователя

Страница: 33 / 124

Hardware Configuration
2
Agilent 34945A Microwave Switch/Attenuator Driver Module User’s Guide 25
The quiescent current required when switching does not occur is:
[34945EXT quiescent current from 24V] + [87104 / 87106 switch quiescent current]
[24V: 1.2W / 24V = 50 mA] + [50 mA] = 100 mA
For a single 34945EXT driven by an external supply, the current required for
actuating a 87104/87106 switch is:
[34945EXT quiescent current from 24V] + [switch quiescent current] + [switching current]
[24V: 1.2W / 24V = 50 mA] + [50 mA] + [200 mA]
= 300 mA (15 ms pulse, 100 mA quiescent)
In summary, when using an external supply the current calculations must
include the quiescent current requirement of the 34945EXT, plus the quiescent
current requirement of
each switch. These quantities are then added to the
switching (pulse) current of the device.
Agilent Switch/Attenuator Configuration
This section contains pin definitions and orientation to assist in connecting
the Agilent switches/attenuators listed in Table 1-2 to their corresponding
Y115x distribution boards.
Only general information is provided. Refer to the reference documents listed
in Table 1-2 for more information on the individual switches. Refer also to
Table 1-2 for the number of switches allowed per distribution board.