Reset; [Keys] - Stanford Research Systems SR810 Manual

STANFORD RESEARCH SYSTEMS
TIME CONSTANT SENSITIVITY
OVLD 6 dB OVLD
12 dB
µA
ks 18 dB V
x100 s 24 dB 5 x100 mV nA
µV
3 x10 ms 2 x10 pA
SYNC
µs
1 x1 1 x1 nV fA
< 200 Hz
Slope
/Oct
Sync
Filter
SIGNAL INPUT RESERVE
OVLD HIGH RESERVE
NORMAL
A LOW NOISE
A - B
6
I (10 ) AC FLOAT
Reserve
8
I (10 ) DC GROUND
Input Couple Ground FILTERS
LINE
A/I B
2 x LINE
Notch
10MΩ/25pF 10MΩ/25pF
Signal Inputs
Power

Reset

[Keys]

Knob
CH1 Display
µA
OVLD % V
nA mV
AUTO
µV
pA
SYNC
fA nV
aA pV
Offset Ratio Expand
CHANNEL ONE
X
R
X noise
AUX IN 1 AUX IN 1 x10 DISPLAY
AUX IN 2 AUX IN 2 x100 X
Display Ratio Expand Output
OUTPUT
OFFSET
On/Off Auto Modify
<20mA
Analog Output
The power switch is on the rear panel. The SR810 is turned on by
pushing switch up. The serial number (5 digits) and the firmware version
are shown in the displays at power on.
A series of internal tests are performed at this point.
DATA Performs a read/write test to the processor RAM.
BATT The nonvolatile backup memory is tested. Instrument settings are stored
in nonvolatile memory and are retained when the power is turned off.
PROG Checks the processor ROM.
DSP Checks the digital signal processor (DSP).
rCAL If the backup memory check passes, then the instrument returns to the
settings in effect when the power was last turned off (User). If there is a
memory error, then the stored settings are lost and the standard (Std)
settings are used.
To reset the unit, hold down the [Setup] key while the power is turned on.
The unit will use the standard settings. The standard setup is listed on
the next page.
The keys are grouped and labeled according to function. This manual
will refer to a key with brackets such as [Key]. A complete description of
the keys follows in this section.
The knob is used to adjust parameters in the Reference display. The
parameters which may be adjusted are internal reference frequency,
Ref Display
Model SR810 DSP Lock-In Amplifier
TRIG
AxOut1 AxOut2 AxOut3 AxOut4
PHASE FREQ AMPL HARM#
REFERENCE
SINE
POS EDGE
NEG EDGE
Phase Freq Ampl Trig
REF IN
+90˚ –90˚ Harm #
ZERO 1MΩ
Ref Input
4-1
Front Panel
AUTO
kHz
Phase Gain
Hz
DEG
V
Offst% Reserve
SETUP
Save Recall
Aux Out
UNLOCK
INTERFACE
INTERNAL
ERROR GPIB/RS232
Source
ADDRESS
ACTIVE BAUD
SRQ PARITY
SINE OUT
REMOTE QUEUE
Local Setup
50Ω
Sine Output