SpectraDynamics HPDA-15RMi-S Operating Manual page 16

6.0 Operation
0 - autoswitch mode
1 - INPUT 1 is active channel
2 - INPUT 2 is active channel
For example:
input: *IN 0<cr>
The instrument is set to autoswitch mode.
*IN? <cr> Query control mode and selected remote mode input channel setting
If the instrument is in LOCAL control mode the remote mode input channel setting may
not match current state of the instrument since it is being controlled by the front panel.
The instrument returns the control mode, cmode and
channel setting, ch.
cmode ch<cr>
For example:
input: *IN?<cr>
output: ETH 0<cr>
cmode - control mode ETH for ethernet control or LOCAL for local control
ch - remote mode input channel parameter { 0, 1, 2}
0 - autoswitch mode
1 - INPUT 1 is active channel
2 - INPUT 2 is active channel
*SR<cr> Request instrument status.
The instrument will return the command string, the latched control status and the latched
signal status. To clear the latched status and obtain a current status issue the *CL
command and then issue the *SR command.
The control status is a 5-bit hexadecimal number with the following format:
control
MSB Bit 4
Bit 3
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1 - DC Power not present
0 - DC Power OK
1 - Remote (Ethernet) control mode
0 - Local control mode
selected remote mode input