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Microwave Switch/Attenuator Driver 7
L4400 User’s Guide 143
Channel Numbering
The L4445A uses the following channel numbering scheme:
1<rem><channel>
where:
rem is the remote module being controlled, and is a single digit in the range
of 1 to 8.
channel is the channel number on the remote module.
The channel number is two digits spanning channels across each remote
module. Channel numbers are shown below (also see the figure on
page 140).
The channel numbers are arranged to facilitate the pairing of channels for
dual coil switches and attenuators. Dual coil devices require the use of two
channels, one for each coil. By pairing the upper and lower channels in each
bank, the devices can be controlled using only the lower channel number. For
example, when a paired- coil device is installed on bank 2, channels 21 and 31
are paired and are controlled using only channel 21.
The following SCPI command closes channel 5 on the master remote module
connected to the L4445A.
ROUT:CLOS (@1105)
You can also use a range of channel numbers. You could close all the channels
on the master remote module connected to a L4445A by sending the following
command.
ROUT:CLOS (@1101:1178)
Note that when single- coil devices are used, the channel numbering is not
consecutive across all 16 channels in a bank.
Bank Channels Channels
Bank 1 1 to 8 11 to 18
Bank 2 21 to 28 31 to 38
Bank 3 41 to 48 51 to 58
Bank 4 61 to 68 71 to 78