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Chapter 5 Remote Interface Reference
Specific Plug-in Module Commands
5
For example, using a 3499C mainframe, if you send ROUT:CPA 1,3 to
pair the modules in slots 1 and 3, the ROUT:CPA? query will return:
1,3,0,0
[ROUTe:]
FUNCtion <slot>,<1|2|3|4|WIRE1|WIRE2|BIWIRE2|WIRE4>
FUNCtion? <slot>
[ROUTe:]FUNCtion is used to configure a N2260A (see page 176) or
N2266A (see page 200) 40-channel MUX module. Four configurations
are possible:
•
80-channel 1-wire MUX
•
40-channel 2-wire MUX
•
two 20-channel 2-wire MUXs
•
20-channel 4-wire MUX
After an instrument power on or reset, the module will return to the
default 40-channel 2-wire MUX mode. Changing function mode will open
all the switching channels on a module.
1-Wire Mode (1|WIRE1) configures the MUX as an 80-channel single-
ended (1-wire) MUX module. The valid channel numbers are s00 to s79.
The Low (L) terminals form channels 00 through 39, the High (H)
terminals form channels 40 through 79. Only one channel can be closed
at a time when in 1-wire mode.
2-Wire Mode (2|WIRE2) configures the MUX as a 40-channel 2-wire
MUX module. The valid channel numbers are s00-s39. To close/open/scan
one channel is actually to close/open/scan a 2-wire pair.
Dual 2-Wire Mode (3|BIWIRE2) configures the MUX as two
independent 20-channel 2-wire MUX modules. The valid channel
numbers are s00-s39 (s00-s19 for the first MUX and s20-s39 for the
second).
4-Wire Mode (4|WIRE4): This mode configures the N2260A or N2266A
as a 20-channel 4-wire MUX module. Channels 20 through 39 (2-wire)
are automatically paired with Channels 00 through 19. The valid
channel numbers are s00-s19. To close/open/scan a channel is actually
closing/opening/scanning a 4-wire connection in this mode.
If two modules are paired, changing the configuration on one module will
result in the other module being changed to the same configuration. Two
modules CANNOT be paired if they are configured differently.
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