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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 MΩ (0) or 100 MΩ (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 X
2
through F
2
.
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).