Specifications

Chapter 2 Command System RIGOL
M300 Programming Guide 2-65
INPut:IMPedance:AUTO
Syntax INPut:IMPedance:AUTO <state>[,(@<ch_list>)]
INPut:IMPedance:AUTO? [(@<ch_list>)]
Description Enable or disable the impedance automatic input mode for the DCV measurements on the
specified channels.
Parameters
Name Type Range Default
<state>
Bool
{OFF|0|ON|1}
OFF
<ch_list>
Channel
List
One or more channels (only for the
multiplexer channels), the rules are as
follows:
(@101): channel 01 on the module in
Slot1;
(@101:103): channel 01 through 03 on the
module in Slot1;
(@101:103,301): channel 01 through 03
on the module in Slot1 and channel 01 on
the module in Slot3.
If the
parameter is
omitted, this
command will
be applied to
the whole
scan list.
Explanation  By default, the impedance automatic input is disabled. At this point, the input
impedance is fixed at 10 MΩ for all the DCV ranges.
 When the impedance automatic input is enabled, the input impedance are set to >10
GΩ automatically on the 200 mV, 2 V and 20 V ranges and are set to 10 MΩ
automatically on the ranges greater than 20V.
 The impedance automatic input mode will be disabled (OFF) after a Factory Reset
(the *RST command).
Return
Format
The query returns 0 (OFF) or 1 (ON). Multiple return values are separated by commas.
Example
INP:IMP:AUTO ON,(@101)
INP:IMP:AUTO? (@101)
The query returns 1.