Stanford Research Systems SR865A, Руководство по эксплуатации

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128 Programming Chapter 4
SR865A DSP Lock-in Amplifier
Scan Commands
SCNPAR(?) { Fint | REFAmp | REFDc | OUT1 | OUT2 | i }
The SCNPAR i command sets the scan parameter to Fint (i=0), Ref Ampl (i=1), Ref dc
(i=2), Out1 (1=3) or Out2 (i=4).
Example
SCNPAR F Set the scan parameter to Fint
SCNPAR 0
SCNPAR?
Returns the scan parameter i
SCNLOG(?) { LIN | LOG | i }
The SCNLOG i command sets the scan type to linear (i=0) or logarithmic (i=1).
Example
SCNLOG LIN Set the scan type to linear
SCNLOG 0
SCNLOG?
Returns the scan type i
SCNEND(?) { ONce | REpeat | UPdown | i }
The SCNEND i command sets the scan end mode to once (i=0), repeat (i=1) or up/down
(i=2).
Example
SCNEND REPEAT Set the scan end mode to repeat
SCNLOG 1
SCNLOG?
Returns the scan end mode i
SCNSEC(?) { x }
The SCNSEC x command sets the scan time to x seconds. The scan time is limited to
20 days (1728000 seconds).
Example
SCNSEC 1234 Set the scan time to 1234 seconds (20:34)
SCNSEC 1.234E3
SCNSEC?
Returns the scan time in seconds
SCNAMPATTN(?) {i}
The SCNAMPATTN i command sets the operating mode for the output attenuators when
scanning sine out amplitude to automatic (i=0) or fixed (i=1).
Normally, the sine out hardware will automatically switch one or more balanced
attenuators into the output signal path to optimize performace for the commanded
amplitude. During scans, however, it can be helpful to force the attenuators to remain in a
fixed configuration, inhibiting the relay switching that would otherwise introduce
transients in the sine output.