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Agilent 34941A-34942A RF Multiplexer Modules User’s Guide
Operating Considerations.
Operating Considerations.
Electrical Considerations
See the
Introduction to the Plug In Modules
chapter of the 34980A
Mainframe User’s Guide
for detailed environmental operating conditions
for the 34980A mainframe and its installed modules. That guidance sets
maximum per channel current and power ratings at rated voltage for
pollution degree 1 (dry) and pollution degree 2 (possible condensation)
conditions, for each of the GP modules.
Signal Connections
The RF MUX modules do not connect to the analog buses. Instead, all
signal connections are made through the visible connectors via external
cables. Each visible connector on an RF MUX module is labeled with a
number (11 through 44), that represents a channel you can close
programmatically from the front panel or with using the Web Browser
Interface. When you close a channel on the RF MUX modules you
automatically close all relays that create a direct path to the Common of a
bank.
Channel Relay Operation
With RF MUX switches, you cannot open switches programmatically. You
can only close a channel. When you close one channel, another channel
automatically opens. Therefore, only one channel relay in each bank is
closed at any time.
Electrical Isolation
You can configure each bank on the RF MUX modules to be either isolated
or chassis- grounded. The modules come with chassis- grounded metal
shoulder washers installed on all connectors in each bank of relays. If you
want to isolate a bank from the other banks and from chassis- ground, you
must remove the five metal washers in that bank and replace them with
the provided plastic shoulder washers.
To isolate a bank from other banks
and chassis-ground, install the
provided
plastic
shoulder washers
on the connectors in the bank to
be isolated. When installing the
plastic shoulder washers, use
7 in-lbs of torque.
The 34941A and 34942A are shipped
from the factory chassis-grounded
with
metal
shoulder washers
installed on all connectors in each
bank of relays.