Agilent Technologies L4400 Podręcznik Użytkownika Strona 154

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142 L4400 User’s Guide
7 L4445A Microwave Switch/Attenuator Driver
Power Supplies
The switches and attenuators on the master remote module can be
powered from the L4445A or use an external power supply. All additional
slave modules must use an external power supply.
Each remote module has a terminal strip used to connect external switch
po
wer. The three most common power supply voltages used by the
microwave switches and attenuators are:
5 V
olts
15 V
olts
24 V
olts (most common)
+V
GND
EXTERNAL
POWER INPUT
30 VCD MAX
+V
Power Consumption
Each 34945EXT can drive up to 2A continuously using an external power
supply. The actual amount of power available for the switches on each
34945EXT module varies with the type of switches used.
Some swit
ch types consume power even in their quiescent state.
Be sure to review the switch data she
ets for the switches you are using.
S
et the pulse width to the minimum necessary to activate the switch
using the
ROUTe:CHANnel:DRIVe:PULSe:WIDTh command.
A
dd power supply recovery time using the
ROUTe:CHANnel:DRIVe:TIMe:RECovery command
Us
e an external power supply if possible.
W
hen the source for the master remote module is set to internal, the
switching current or switching and quiescent currents drawn from the
internal power supply must not exceed the supply’s specification of:
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