User`s guide

L4445A 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<re
m><00>
where:
rem i
s 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.
TTL Drive
Open Collector
Drive
Drive Active
H
H
L
L
The drive mode is set on a per bank basis using the
ROUTe:RMODule:BANK:DRIVe:MODE command.