Signal Channel |
Voltage Input |
Modes |
A only, -B only or Differential (A-B) |
Full-scale Sensitivity |
0.5 Hz ≤ F ≤ 250 kHz |
10 nV to 1 V in a 1-2-5 sequence |
250 kHz < F ≤ 2.0 MHz |
100 nV to 1 V in a 1-2-5 sequence |
Max. Dynamic Reserve |
> 100 dB |
Impedance |
100 MΩ // 25 pF |
Maximum Safe Input |
20 V pk-pk |
Voltage Noise |
5 nV/√Hz @ 1 kHz |
C.M.R.R. |
> 100 dB @ 1 kHz |
Frequency Response |
0.5 Hz to 2.0 MHz |
Gain Accuracy |
±0.3% typ, ±0.6% max. (full bandwidth) |
Distortion |
-90 dB THD (60 dB AC gain, 1 kHz) |
Line Filter |
attenuates 50, 60, 100, 120 Hz |
Grounding |
BNC shields can be grounded or floated via 1 kΩ to ground |
Current Input |
Mode |
Low Noise, Normal or Wide Bandwidth |
Full-scale Sensitivity |
|
Low Noise |
10 fA to 10 nA in a 1-2-5 sequence |
Normal |
10 fA to 1 µA in a 1-2-5 sequence |
Wide Bandwidth |
|
F ≤ 250 kHz |
1 pA to 100 µA in a 1-2-5 sequence |
F > 250 kHz |
10 pA to 100 µA in a 1-2-5 sequence |
Max. Dynamic Reserve |
> 100 dB |
Frequency Response (-3 dB): |
|
Low Noise |
≥ 500 Hz |
Normal |
≥ 50 kHz |
Wide Bandwidth |
≥ 1 MHz |
Impedance |
|
Low Noise |
< 2.5 kΩ @ 100 Hz |
Normal |
< 250 Ω @ 1 kHz |
Wide Bandwidth |
< 25 Ω @ 10 kHz |
Noise |
|
Low Noise |
13 fA/√Hz @ 500 Hz |
Normal |
130 fA/√Hz @ 1 kHz |
Wide Bandwidth |
1.3 pA/√Hz @ 1 kHz |
Gain Accuracy |
± 0.6% typ, midband |
Line Filter |
attenuates 50, 60, 100, 120 Hz |
Grounding |
BNC shield can be grounded or floated via 1 kΩ to ground |
Reference Channel |
TTL Input |
|
Frequency Range |
0.5 Hz to 2.0 MHz |
Analog Input |
|
Impedance |
1 MΩ // 30 pF |
Sinusoidal Input Level |
1.0 V rms* |
Frequency Range |
0.5 Hz to 2.0 MHz |
Squarewave Input Level |
250 mV rms |
Frequency Range |
2 Hz to 2 MHz |
|
*Note: Lower levels can be used with the analog input at the expense of increased phase errors |
Phase Set Resolution |
0.001° increments |
Phase Noise at 100 ms TC, 12 dB/octave slope: |
|
Internal Reference |
< 0.0001° rms |
External Reference |
< 0.01° rms @ 1 kHz |
Orthogonality |
90° ± 0.0001° |
Acquisition Time |
|
Internal Reference |
instantaneous acquisition |
External Reference |
2 cycles + 50 ms |
Reference Frequency Meter Resolution |
1 ppm or 1 mHz, whichever is the greater |
Demodulator and Output Processing |
Output Filters |
|
X, Y and R outputs only |
|
Time Constant |
1 µs to 1 ms in a 1-2-5 sequence, and 4 ms |
Slope (roll-off) |
6 and 12 dB/octave |
All outputs |
|
Time Constant |
500 µs to 100 ks in a 1-2-5 sequence |
Slope |
6, 12, 18 and 24 dB/octave |
Synchronous Filter |
Available for F < 20 Hz |
Offset |
Auto and Manual on X and/or Y: ±300% full-scale |
Absolute Phase Measurement Accuracy |
≤ 0.01° |
Oscillator |
Frequency |
|
Range |
0.5 Hz to 2.0 MHz |
Setting Resolution |
1 mHz |
Absolute Accuracy |
± 50 ppm |
Distortion (THD) |
-80 dB @ 1 kHz and 100 mV rms |
Amplitude (rms) |
|
Range |
1 mV to 1 V |
Setting Resolution |
1 mV |
Accuracy |
±0.2% |
Stability |
50 ppm/°C |
Output Impedance |
50 Ω |
Sweep |
|
Amplitude Sweep |
|
Output Range |
0.000 to 1.000 V rms |
Law |
Linear |
Step Rate |
20 Hz maximum (50 ms/step) |
Frequency Sweep |
|
Output Range |
0.5 Hz to 2.0 MHz |
Law |
Linear or Logarithmic |
Step Rate |
1 kHz maximum (1 ms/step) @ output time constant settings of 500 µs or longer; 140 ms/point otherwise |
Outputs |
Main Analog (CH1 and CH2) Outputs: |
|
Function |
X, Y, R, Θ, Noise, Ratio, Log Ratio and User Equations 1 & 2. |
Amplitude |
±2.5 V full-scale; linear to ±300% full-scale |
Impedance |
1 kΩ |
Update Rate |
|
X, Y or R @ TC £ 4 ms |
7.5 MHz |
All outputs @ TC ³ 500 µs |
1 kHz |
Reference Output |
|
Waveform |
0 to 3 V rectangular wave, active in External Reference Mode only |
Impedance |
TTL-compatible |
Power - Low Voltage |
±15 V at 100 mA rear panel 5-pin 180° DIN connector for powering SIGNAL RECOVERY preamplifiers |
General |
Power Requirements |
|
Voltage |
110/120/220/240 VAC |
Frequency |
50/60 Hz |
Power |
200 VA max |
Dimensions |
|
Width |
17¼" (435 mm) |
Depth |
19" (485 mm) |
Height |
|
With feet |
6" (150 mm) |
Without feet |
5¼" (130mm) |
Weight |
25.4 lb (11.5 kg) |