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Nomenclatures:
<h>: hexadecimal digit
<n>: decimal digit
Commands
Responses
Remarks
*IDN?
<System message> System message = “Stanford_Research_Systems,SR446, <Serial Number>,
<Revision number>”
*RST
None
Reset configuration to default settings. Copy factory settings to last settings
and current settings. EEPROM update might be delayed up to 30 seconds.
ICPL <n>
None
Select input couple mode
n: 0 = DC, 1 = AC, 2 = GND
ICPL?
<n>
Query input couple mode
n: 0 = DC, 1 = AC, 2 = GND
INPZ <n>
None
Select input impedance [Ω]
n: 0 = 500, 1= 50
INPZ?
<n>
Query input impedance [Ω]
n: 0 = 500, 1= 50
UNIT <n>
None
Select unit of the gain
n: 0 = dB; 1 = V/V
UNIT?
<n>
Query unit of the gain
n: 0 = dB; 1 = V/V
GAIN <n>
None
Select voltage gain
n: gain index from 0 to 20
Gain = 10
n/10
[V/V] or
Gain = 2
×
n [dB]
GAIN?
<n>
Query voltage gain
n: gain index from 0 to 20 See above
BNDW <n>
None
Select bandwidth index.
n: 0 = Full, 1 = 200 MHz, 2 = 100 MHz, & 3 = 20 MHz
BNDW?
<n>
Query bandwidth
n: 0 = Full, 1 = 200 MHz, 2 = 100 MHz, & 3 = 20 MHz
OCAL
<CAL in Progress>
<CAL done> or
<CAL aborted>
Initiate offset calibration. Note that this command is ignored if the calibration
is already in progress. Wait ~18 seconds for completion.
OCAL?
<n>
Query status of offset calibration.
0 = Idle
1 = Requested by remote command
2 = Requested by front panel
3 = In progress
4 = Aborted after not able to calibrate
5 = Done after success.
This is read to clear command
FLAG?
<hhhhhhhh>
Query system status flags
hhhhhhh: 8-digit hexadecimal number including leading ‘0’. The definitions
of each bit are defined below.
RDSN?
<nnnnnnnn>
Read 8-digit serial number.
OUTP <n> <n>
Both output channels enable: 0 = disable; 1 = enable. After re-boot, the
outputs become enable again.
System flags:
