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Programming the Multiplexer
Specifying SCPI
Commands
Channel Address
To program the Agilent E8462A Multiplexer using SCPI, you must know
the interface and module address and SCPI commands to be used.
Guidelines to select SCPI commands for the Multiplexer follow. See the
Agilent 75000 Series C Installation and Getting Started Guide for interface
addressing.
Note
This discussion applies only to SCPI (Standard Commands for
Programmable Instruments) programming. See Appendix B for
information on the Multiplexer's registers.
To address specific channels within a Multiplexer, you must specify the
SCPI command and channel address. Use
the channels specified,
specified, and
specified, one channel at a time.
The Multiplexer's channel address (channel_list) has the form
where
= module (card) number (01-99), b = bank or MUX number (0 to
cc
one less than banks or muxes) and
number consists of three parts listed in the below table:
Channel List
Card Number
(cc)
ssbccc
01-99
The tree relays and analog bus relays have the same channel number no
matter what operating mode the Multiplexer is. But the channel relays
(CH000-255) may have different channel numbers under different operating
mode. See the following table:
Operating Mode
1-wire
2-wire
3-wire
4-wire
<channel_list> to open the channels
OPEN
SCAN
<channel_list> to close and open the set of channels
nnn
Bank or Mux
Channel Number
(b)
0-7
9
9
9
Valid Channel
Number
000-255
000-255
000-127
000-031, 064-095, 128-159, 192-223
(Channel 000 is paired with channel 032, 001
is paired with 033, etc. Channel 064 is paired
with 096, 065 with 097, etc. Channel 128 is
paired with 160, channel 129 with 161, etc.
Channel 192 is paired with 224, channel 193
with 225, etc.)
000-063
000-031, 128-159
000-063
000-031, 128-159
Configuring the Agilent E8462A Multiplexer
<channel_list> to close
CLOSe
(@ccbnnn)
= channel numbers. The channel
Channel Description
(nnn)
000-255
256 channel relays
000-021
22 tree relays
100-108
9 Form C tree relays
200-204
5 analog bus relays
Corresponds to 1-Wire Mode Channel
29
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