Center for Relativistic Laser Science

Signal Channel
Voltage inputs Single-ended or differential
Sensitivity 2 nV to 1 V
Current input 106 or 108 V/A
Input impedance
     Voltage input 10MΩ+25pF, AC or DC coupled
     Current input 1 kΩ to virtual ground
Gain accuracy ±1 % (±0.2 % typ.)
Noise 6 nV/√Hz at 1 kHz
 0.13 pA/√Hz at 1 kHz (106 V/A)
 0.013pA/√Hz at 100 Hz (108 V/A)
Line filters 50/60 Hz and 100/120 Hz (Q=4)
Dynamic reserve >100 dB (without prefilters)

Reference Channel
Frequency range 0.001 Hz to 102.4 kHz
Input impedance 1 MΩ, 25 pF
Phase resolution 0.01° front panel
Absolute phase error <1°
Relative phase error <0.001°
Orthogonality 90° ± 0.001°
Phase noise
     Int. reference Synthesized, <0.0001°rms at 1kHz
Phase drift <0.01°/°C below 10 kHz,
 <0.1°/°C, 10 kHz to 100 kHz
Acquisition time (2 cycles + 5 ms) or 40 ms

Demodulator
Harmonic rejection -90 dB
Time constants = 10µs-30ks (6,12,18,24dB/oct rolloff).

Internal Oscillator
Range 1 mHz to 102 kHz
Accuracy 25 ppm + 30 µHz
Frequency resolution 4½ digits or 0.1 mHz
Amplitude 0.004 to 5 Vrms into 10 kΩ
Amplitude accuracy 1 %
Amplitude stability 50 ppm/°C
Outputs Sine, TTL

Inputs and Outputs
CH1,CH2 outputs ±10 V output of X, R, X-noise, Aux 1 or Aux 2. Updated at 512 Hz.
Sine Out Internal oscillator analog output
TTL Out Internal oscillator TTL output
Data buffer two 16k point buffers

General
Interfaces IEEE-488.2 and RS-232

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