Command list – SRS Labs SR850 User Manual

Page 9

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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

(0) or 100 M

(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).

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