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Connecting Switchbox Channels to Direct Terminals
The direct terminals provide direct access to closed channels. There is a
direct terminal for each bank, Bank 0 and Bank 1. Closing any channel in
Bank 0 (channels 00 to 07) connects the channel to the Bank 0 direct
terminal. Closing any channel in Bank 1 (channels 08 to 15) connects the
channel to the Bank 1 direct terminal. You can isolate the two banks from
each other, and from the analog bus connector and tree terminals, with the
SCAN:PORT NONE command. This command opens the A and B tree
isolation switches. Figure 3-1 shows how to connect channels 02 and 09 of
a single module to their respective direct terminals. Only one channel can
be closed at a time.
SCAN:PORT NONE Opens Tree Isolation Switches.
CLOSe (@102) Closes channel 02 on card 01.
CLOSe (@109) Opens 02 then closes 09.
Figure 3-1. Connecting Channels 02 and 09 to their Respective
Direct Terminals
32 Using the HP E1351A/53A FET Multiplexer Modules Chapter 3