Model 7701
15
Operation
Detailed information to close and open switching module channels are provided in Section 2 of the
Model 2700 or 2750 User’s Manual. The following summarizes basic operation, and provides operating
information specific to the Model 7701.
Channel assignments
The Model 2700 has two slots for switching modules and the Model 2750 has five slots. To control the
appropriate switching module, the slot number must be included with the switching module channel
number when you specify a channel. The channel assignment is formatted as follows:
SCH
where: S is the slot number
CH is the channel number
Examples:
101 = Slot 1, Channel 1
210 = Slot 2, Channel 10
506 = Slot 5, Channel 6 (Model 2750)
NOTE
For remote operation, the 3-digit channel assignment is included in the channel list parameter
for the commands.
System channel operation
System channel operation is used to connect measurement channels to the Model 2700/2750 DMM.
With 2-wire function selected, system channels 1 through 32 can be closed. When one of these channels
is closed, channel 35 automatically closes to connect the measurement channel to the DMM Input.
With a 4-wire function selected, system channels 1 through 16 can be closed. When one of these chan-
nels is closed, its paired channel closes, and the backplane relays for sense and input (channels 34 and
35) also close.
For a 4-wire function, channels are paired as follows:
System channel operation for the Model 7701 is summarized as follows:
•
The
/
keys on the Model 2700 or 2750 DMM can be used to close a system channel.
•
The CLOSE key can be used to close a system channel. For the Model 2750 and later versions of
the Model 2700, use the SINGLE option of the CLOSE key.
•
Use the OPEN key to open all channels in the test system. For the Model 2750 and later versions
of the Model 2700, use the ALL option of the OPEN key.
•
For remote operation, the following commands are used for system channel
operation:
ROUT:CLOS <clist>
Close specified system channel.
ROUT:CLOS?
Returns the closed system channel.
ROUT:CLOS:STAT? <clist>
Query closed channels in list (1 = closed).
ROUT:OPEN:ALL
Open all channels.
CH1 and CH17
CH5 and CH21
CH9 and CH25
CH13 and CH29
CH2 and CH18
CH6 and CH22
CH10 and CH26
CH14 and CH30
CH3 and CH19
CH7 and CH23
CH11 and CH27
CH15 and CH31
CH4 and CH20
CH8 and CH24
CH12 and CH28
CH16 and CH32
