Stanford Research Systems SR865A Operation Manual page 127

Chapter 4
Example
SOFF 34.5 MV
SOFF 3.45E-2
SOFF 0.0345
SOFF?
REFM(?) { COMmon | DIFference | i }
The REFM i
Example
REFM DIF
REFM DIFFERENCE
REFM 1
REFM?
RSRC(?) { INT | EXT | DUAL | CHOP | i }
The RSRC i
(i=2) or chop (i=3).
Example
RSRC EXT
RSRC 1
RSRC?
RTRG(?) { SIN | POSttl | NEGttl | i }
The RTRG i
TTL (i=1) or negative TTL (i=2).
Example
RTRG POS
RTRG POSTTL
RTRG 1
RTRG?
REFZ(?) { 50ohms | 1Meg | i }
The REFZ i
1 MΩ (i=1).
Example
REFZ 50
REFZ 50OHMS
REFZ 0
REFZ 1M
REFZ 1MEG
REFZ?
Set the sine out dc level to 34.5 mV
Returns the sine out dc level in Volts
command sets the sine out dc mode to common (i=0) or difference (i=1).
Set the dc mode to difference
Returns the dc mode i
command sets the reference source to internal (i=0), external (i=1), dual
Set the reference mode to external
Returns the reference mode i
command sets the external reference trigger mode to sine (i=0), positive
Set the external reference trigger to positive TTL
Returns the external reference trigger mode i
command sets the external reference trigger input to 50 Ω (i=0) or
Set the external reference input to 50 Ω
Set the external reference input to 1 MΩ
Returns the external reference input i
Programming
SR865A DSP Lock-in Amplifier
109