Command list – SRS Labs SR850 User Manual
Page 9
SR850 DSP Lock-In Amplifier
1-7
COMMAND LIST
VARIABLES
i,j,k,l,m
Integers
f
Frequency (real)
x,y,z
Real Numbers
s
String
REFERENCE and PHASE
page description
PHAS (?) {x}
6-4
Set (Query) the Phase Shift to x degrees.
FMOD (?) {i}
6-4
Set (Query) the Reference Source to Internal (0), Sweep (1) , or External (2).
FREQ (?) {f}
6-4
Set (Query) the Reference Frequency to f Hz.Set only in Internal reference mode.
SWPT (?) {i}
6-4
Set (Query) the Internal Sweep Type to Linear (0) or logarithmic (1).
SLLM (?) {f}
6-4
Set (Query) the Start Frequency to f Hz.Set only in Internal Sweep mode.
SULM (?) {f}
6-4
Set (Query) the Stop Frequency to f Hz.Set only in Internal Sweep mode.
RSLP (?) {i}
6-4
Set (Query) the External Reference Slope to Sine(0), TTL Rising (1), or TTL Falling (2).
HARM (?) {i}
6-5
Set (Query) the Detection Harmonic to 1
≤
i
≤
32767 and i•f
≤
102 kHz.
SLVL (?) {x}
6-5
Set (Query) the Sine Output Amplitude to x Vrms. 0.004
≤
x
≤
5.000.
INPUT and FILTER
page description
ISRC (?) {i}
6-6
Set (Query) the Input Configuration to A (0), A-B (1) , or I (2).
IGAN (?) {i}
6-6
Set (Query) the Current Conversion Gain to 1 M
Ω
(0) or 100 M
Ω
(1).
IGND (?) {i}
6-6
Set (Query) the Input Shield Groungind to Float (0) or Ground (1).
ICPL (?) {i}
6-6
Set (Query) the Input Coupling to AC (0) or DC (1).
ILIN (?) {i}
6-6
Set (Query) the Line Notch Filters to Out (0), Line In (1) , 2xLine In (2), or Both In (3).
GAIN and TIME CONSTANT
page description
SENS (?) {i}
6-7
Set (Query) the Sensitivity to 2 nV (0) through 1 V (26) rms full scale.
RMOD (?) {i}
6-7
Set (Query) the Dynamic Reserve Mode to Max (0), Manual (1), or Min (2).
RSRV (?) {i}
6-7
Set (Query) the Dynamic Reserve to i th reserve. Set will switch to Manual Reserve Mode.
OFLT (?) {i}
6-7
Set (Query) the Time Constant to 10 µs (0) through 30 ks (19).
OFSL (?) {i}
6-8
Set (Query) the Low Pass Filter Slope to 6 (0), 12 (1), 18 (2) or 24 (3) dB/oct.
SYNC (?) {i}
6-8
Set (Query) the Synchronous Filter to Off (0) or On below 200 Hz (1).
OUTPUT and OFFSET
page description
FOUT (?) i {, j}
6-9
Set (Query) the CH1 (i=1) or CH2 (2) Output Source to XY,R,
θ
,Trace 1, 2, 3, 4 (j=0...6).
OEXP (?) i {, x, j}
6-9
Set (Query) the X, Y, R (i=1,2,3) Offset to x percent and Expand to j. -105.00
≤
x
≤
105.00 and
1
≤
j
≤
256.
AOFF i
6-9
Auto Offset X, Y, R (i=1,2,3).
TRACE and SCAN
page description
TRCD (?) i {, j, k, l, m}
6-10
Set (Query) the Definition of Trace i (1-4) to j•k/l and Store (m=1) or Not Store (0). j, k, l select
1, X, Y, R, q, Xn, Yn, Rn, Aux 1, Aux 2, Aux 3, Aux4, or F (j,k,l = 0...12). l=13-24 selects X2
through F2.
SRAT (?) {i}
6-10
Set (Query) the Sample Rate to 62.5 mHz (0) through 512 Hz (13) or Trigger (14).
SLEN (?) {x}
6-10
Set (Query) the Scan Length to x seconds.
SEND (?) {i}
6-10
Set (Query) the Scan Mode to 1 Shot (0) or Loop (1).
TRIG
6-10
Software trigger command. Same as trigger input.
DISPLAY and SCALE
page description
ASCL
6-11
Auto Scale the active display.
ADSP (?) {i}
6-11
Set (Query) the active display to Full (0), Top (1) or Bottom (2). Full screen is always active.
SMOD (?) {i}
6-11
Set (Query) the Screen Format to Single (0) or Up/Down dual (1) display mode.
MNTR (?) {i}
6-11
Set (Query) the Monitor Display to settings (0) or Input/Output (1).
DTYP (?) i {, j}
6-11
Set (Query) theFull (i=0), Top (i=1) or Bottom (i=2) Display Type to Polar (j=0), Blank (j=1),
Bar (j=2) or Chart (j=3).