Stanford Research Systems SR560, Manual

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APPENDIX A
A - 1
REMOTE PROGRAMMING
Introduction
The SR560 is equipped with a standard DB-
25 RS-232C connector on the rear panel for
remote control of all instrument functions.
The interface is configured as listen-only,
9600 baud DCE, 8-bit, no parity, 2 stop bits,
and is optically isolated to prevent any noise
or grounding problems.
Up to four SR560 amplifiers can be
connected in parallel to the same RS-232
interface. Units sharing the same interface
must have a unique address as set on dip
switch SW601, accessible through the
bottom cover of the unit. To set an
instrument to one of the four available
addresses, adjust positions one and two of
dip switch SW601 as follows:
SW601
Pos. 2 Pos.1
Address
of unit
OFF OFF UNIT 0
OFF ON UNIT 1
ON OFF UNIT 2
ON ON UNIT 3
Commands
The following commands are obeyed by all
SR560’s that are addressed to listen. The
LALL, LISN, and UNLS commands are
always obeyed and control the address
status of the SR560. Commands must end
with a carriage return and line feed <CR>
<LF>.
BLINK i Operates amplifier blanking.
i = 0 = not blanked, 1 = blanked
CPLGi Sets input coupling.
I = 0 = ground, 1 = DC, 2 = AC
DYNR i Sets dynamic reserve.
i = 0 = low noise, 1 = high DR,
2 = calibration gains (defaults)
FLTM i Sets filter mode.
i = 0 = bypass,
1 = 6 dB low pass,
2 = 12 dB low pass,
3 = 6 dB high pass,
4 = 12 dB highpass,
5 = bandpass
GAIN i Sets the gain.
i = 0 – 14 = 1, 2, 5, … 50 k gain
HFRQi Sets highpass filter frequency.
I = 0 – 11 sets frequency = 0.03
Hz to 10 kHz
INVT i Sets the signal invert sense.
i = 0 = non-inverted,
1 = inverted
LALL Listen all. Makes all attached
SR560’s listeners.
LISN i Listen command. Makes
SR560 with address i (0,1,2,3)
a listener.
LFRQ i Sets lowpass filter frequency.
i = 0 – 15 sets frequency
= 0.03 Hz to 1 MHz
ROLD Resets overload for ½ second.
SRCE i Sets the input source.
i = 0 = A, 1 = A-B, 2 = B
UCAL i Sets the vernier gain status.
i = 0 = cal’d gain,
1 = vernier gain
UCGN i Sets the vernier gain to i %.
i = 0 to 100
UNLS Unlisten. Unaddresses all
attached SR560’s.
*RST Reset. Recalls default settings.