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Signal Channel
Voltage inputs Single-ended or differential
Sensitivity 2 nV to 1 V
Current input 106 or 108 V/A
Input impedance
Voltage 10 MΩ + 25 pF, AC or DC coupled
Current 1 kΩ to virtual ground
Gain accuracy ±1 % (±0.2 % typ.)
Noise (typ.) 6 nV/√Hz at 1 kHz
0.13 pA/√Hz at 1 kHz (106 V/A)
0.013 pA/√Hz at 100 Hz (108 V/A)
Line filters 50/60 Hz and 100/120 Hz (Q = 4 )
CMRR 100 dB to 10 kHz, decreasing by
6 dB/oct above 10 kHz
Dynamic reserve >100 dB (without prefilters)
Stability <5 ppm/°C
Reference Channel
Frequency range 0.001 Hz to 102.4 kHz
Reference input TTL or sine (400 mVpp min.)
Input impedance 1 MΩ, 25 pF
Phase resolution 0.01° front panel, 0.008° through
computer interfaces
Absolute phase error <1°
Relative phase error <0.001°
Orthogonality 90° ± 0.001°
Phase noise
Internal ref. Synthesized, <0.0001° rms at 1 kHz
External ref. 0.005° rms at 1 kHz (100 ms time
constant, 12 dB/oct)
Phase drift <0.01°/°C below 10 kHz,
<0.1°/°C above 10 kHz
Harmonic detection 2F, 3F, ... nF to 102 kHz (n < 19,999)
Acquisition time (2 cycles + 5 ms) or 40 ms,
whichever is larger
Demodulator
Stability Digital outputs and display: no drift
Analog outputs: <5 ppm/°C for all
dynamic reserve settings
Harmonic rejection −90 dB
Time constants 10 μs to 30 ks (6, 12, 18, 24 dB/oct
rolloff). Synchronous filters
available below 200 Hz.
Internal Oscillator
Range 1 mHz to 102 kHz
Frequency accuracy 25 ppm + 30 μHz
Frequency resolution 4½ digits or 0.1 mHz, whichever
is greater
Distortion −80 dBc (f <10 kHz), −70 dBc
(f >10 kHz) @ 1 Vrms amplitude
Amplitude 0.004 to 5 Vrms into 10 kΩ (2 mV
resolution), 50 Ω output impedance,
50 mA maximum current into 50 Ω
Amplitude accuracy 1 %
Amplitude stability 50 ppm/°C
Outputs Sine, TTL (When using an external
reference, both outputs are phase
locked to the external reference.)
Displays
Channel 1 4½-digit LED display with
40-segment LED bar graph. X, R,
X-noise, Aux 1 or Aux 2. The
display can also be any of these
quantities divided by Aux 1 or Aux 2.
Channel 2 (SR830) 4½-digit LED display with
40-segment LED bar graph. Y, θ,
Y-noise, Aux 3 or Aux 4. The display
can also be any of these quantities
divided by Aux 3 or Aux 4.
Offset X, Y, R can be offset up to ±105 %
of full scale.
Expand X, Y, R can be expanded by 10×
or 100×.
Reference 4½-digit LED display
Inputs and Outputs
CH1 output X, R, X-noise, Aux 1 or Aux 2,
(±10 V), updated at 512 Hz
CH2 output (SR830) Y, θ, Y-noise, Aux 3 or Aux 4,
(±10 V), updated at 512 Hz
X, Y outputs In-phase and quadrature components
(rear panel) (±10 V), updated at 256 kHz.
Aux. A/D inputs 4 BNC inputs, 16-bit, ±10 V,
1 mV resolution, sampled at 512 Hz
Aux. D/A outputs 4 BNC outputs, 16-bit, ±10 V,
1 mV resolution
Sine out Internal oscillator analog output
TTL out Internal oscillator TTL output
Data buffer The SR810 has an 8k point buffer.
The SR830 has two 16k point
buffers. Data is recorded at rates to
512 Hz and read through the
computer interfaces.
Trigger in (TTL) Trigger synchronizes data recording
Remote preamp Provides power to the optional
SR550, SR552 and SR554 preamps
General
Interfaces IEEE-488.2 and RS-232 interfaces
standard. All instrument functions
can be controlled and read through
IEEE-488.2 or RS-232 interfaces.
Power 40 W, 100/120/220/240 VAC,
50/60 Hz
Dimensions 17" × 5.25" × 19.5" (WHD)
Weight 23 lbs.
· 1 mHz to 102.4 kHz frequency range
· >100 dB dynamic reserve
· 5 ppm/°C stability
· 0.01 degree phase resolution
· Time constants from 10 μ s to 30 ks
(up to 24 dB/oct rolloff)
· Auto-gain, -phase, -reserve and -offset
· Synthesized reference source
· GPIB and RS-232 interfaces
Signal Channel
Voltage inputs Single-ended or differential
Sensitivity 2 nV to 1 V
Current input 106 or 108 V/A
Input impedance
Voltage 10 MΩ + 25 pF, AC or DC coupled
Current 1 kΩ to virtual ground
Gain accuracy ±1 % (±0.2 % typ.)
Noise (typ.) 6 nV/√Hz at 1 kHz
0.13 pA/√Hz at 1 kHz (106 V/A)
0.013 pA/√Hz at 100 Hz (108 V/A)
Line filters 50/60 Hz and 100/120 Hz (Q = 4 )
CMRR 100 dB to 10 kHz, decreasing by
6 dB/oct above 10 kHz
Dynamic reserve >100 dB (without prefilters)
Stability <5 ppm/°C
Reference Channel
Frequency range 0.001 Hz to 102.4 kHz
Reference input TTL or sine (400 mVpp min.)
Input impedance 1 MΩ, 25 pF
Phase resolution 0.01° front panel, 0.008° through
computer interfaces
Absolute phase error <1°
Relative phase error <0.001°
Orthogonality 90° ± 0.001°
Phase noise
Internal ref. Synthesized, <0.0001° rms at 1 kHz
External ref. 0.005° rms at 1 kHz (100 ms time
constant, 12 dB/oct)
Phase drift <0.01°/°C below 10 kHz,
<0.1°/°C above 10 kHz
Harmonic detection 2F, 3F, ... nF to 102 kHz (n < 19,999)
Acquisition time (2 cycles + 5 ms) or 40 ms,
whichever is larger
Demodulator
Stability Digital outputs and display: no drift
Analog outputs: <5 ppm/°C for all
dynamic reserve settings
Harmonic rejection −90 dB
Time constants 10 μs to 30 ks (6, 12, 18, 24 dB/oct
rolloff). Synchronous filters
available below 200 Hz.
Internal Oscillator
Range 1 mHz to 102 kHz
Frequency accuracy 25 ppm + 30 μHz
Frequency resolution 4½ digits or 0.1 mHz, whichever
is greater
Distortion −80 dBc (f <10 kHz), −70 dBc
(f >10 kHz) @ 1 Vrms amplitude
Amplitude 0.004 to 5 Vrms into 10 kΩ (2 mV
resolution), 50 Ω output impedance,
50 mA maximum current into 50 Ω
Amplitude accuracy 1 %
Amplitude stability 50 ppm/°C
Outputs Sine, TTL (When using an external
reference, both outputs are phase
locked to the external reference.)
Displays
Channel 1 4½-digit LED display with
40-segment LED bar graph. X, R,
X-noise, Aux 1 or Aux 2. The
display can also be any of these
quantities divided by Aux 1 or Aux 2.
Channel 2 (SR830) 4½-digit LED display with
40-segment LED bar graph. Y, θ,
Y-noise, Aux 3 or Aux 4. The display
can also be any of these quantities
divided by Aux 3 or Aux 4.
Offset X, Y, R can be offset up to ±105 %
of full scale.
Expand X, Y, R can be expanded by 10×
or 100×.
Reference 4½-digit LED display
Inputs and Outputs
CH1 output X, R, X-noise, Aux 1 or Aux 2,
(±10 V), updated at 512 Hz
CH2 output (SR830) Y, θ, Y-noise, Aux 3 or Aux 4,
(±10 V), updated at 512 Hz
X, Y outputs In-phase and quadrature components
(rear panel) (±10 V), updated at 256 kHz.
Aux. A/D inputs 4 BNC inputs, 16-bit, ±10 V,
1 mV resolution, sampled at 512 Hz
Aux. D/A outputs 4 BNC outputs, 16-bit, ±10 V,
1 mV resolution
Sine out Internal oscillator analog output
TTL out Internal oscillator TTL output
Data buffer The SR810 has an 8k point buffer.
The SR830 has two 16k point
buffers. Data is recorded at rates to
512 Hz and read through the
computer interfaces.
Trigger in (TTL) Trigger synchronizes data recording
Remote preamp Provides power to the optional
SR550, SR552 and SR554 preamps
General
Interfaces IEEE-488.2 and RS-232 interfaces
standard. All instrument functions
can be controlled and read through
IEEE-488.2 or RS-232 interfaces.
Power 40 W, 100/120/220/240 VAC,
50/60 Hz
Dimensions 17" × 5.25" × 19.5" (WHD)
Weight 23 lbs.
· 1 mHz to 102.4 kHz frequency range
· >100 dB dynamic reserve
· 5 ppm/°C stability
· 0.01 degree phase resolution
· Time constants from 10 μ s to 30 ks
(up to 24 dB/oct rolloff)
· Auto-gain, -phase, -reserve and -offset
· Synthesized reference source
· GPIB and RS-232 interfaces
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