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Chapter 4 Features and Functions
HP 34905A/6A Dual 4-Channel RF Multiplexers
HP 34905A/6A Dual 4-Channel RF Multiplexers
These modules consist of two independent 4-to-1 multiplexers.
The channels in each bank are organized in a "tree" structure to provide
high isolation and low VSWR . Both banks have a common earth ground.
This module does not connect to the internal DMM . You can connect
your signals directly to the on-board SMB connectors or to the
SMB
-to- BNC cables provided with the module.
99
Bank Switch
98
Bank Switch
NOTES:
The HP 34905A is used for 50 applications. The HP 34906A is used for 75 applications.
You can close only one channel per bank at a time on these modules; closing one channel
in a bank will open the previously closed channel. One channel in each bank is always
connected to COM.
This module responds only to the CLOSE command (OPEN does not apply). To OPEN a
channel, send the CLOSE command to another channel in the same bank.
172
11
12
Com1
13
14
21
22
Com2
23
24
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