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Microwave Switch/Attenuator Driver 7
L4400 User’s Guide 145
Remote Module Identifiers
A special channel numbering method exists for use with SCPI commands that
operate one or more banks of the remote module. This addressing uses a
non- existent channel number (00) to indicate the commands are useful for all
channel in a bank or all channels on a remote module. The format of this
special channel list is specified as:
1<rem><00>
where:
rem is the remote module being controlled, and is a single digit in the range
of 1 to 8.
channel is non- existent channel number 00 on the remote module.
You may not use this special channel list in a range of channels.
The following commands use this form of channel addressing. Refer to the
Programmer’s Reference Help file for more details.
ROUTe:RMODule:BANK:DRIVe:MODE
ROUTe:RMODule:BANK:LED:DRIVe:ENABle
ROUTe:RMODule:BANK:LED:DRIVe:LEVel
ROUTe:RMODule:BANK:PREset
ROUTe:RMODule:DRIVe:LIMit
ROUTe:RMODule:DRIVe:SOURce:BOOT
ROUTe:RMODule:DRIVe:SOURce:IMMediate
Drive Modes
Each remote module can drive the switches and attenuators using either TTL
or open collector drive methods. The TTL drive mode uses a pull- down resistor
on the output and drives a TTL high level when asserted. The open collector
drive provides a current path to ground when asserted.
The drive mode is set on a per bank basis using the
ROUTe:RMODule:BANK:DRIVe:MODE command.
TTL Drive
Open Collector
Drive
Drive Active
H
H
L
L