Signal Channel - Remote Connection Unit (7124RCU) |
Voltage Input |
Modes |
A only, -B only or Differential (A-B) |
Frequency Response |
0.5 Hz < F < 150 kHz (–3dB) |
Full-scale Sensitivity |
2 nV to 1 V in a 1-2-5 sequence (e.g. 2 nV, 5 nV, 10 nV, 20 nV, etc.) |
Impedance - FET input |
10 MΩ // 25 pF, AC or DC coupled |
Indepance - Bipolar input |
10 kΩ // 25 pF, input must be DC coupled |
Max safe input |
±12.0 V |
Voltage Noise |
5 nV/√Hz @ 1 kHz |
C.M.R.R. |
> 100 dB @ 1 kHz degrading by no more than 6 dB/octave with increasing frequency |
Gain Accuracy |
±1.0% typ, ±2.0% max |
Distortion |
-90 dB THD (60 dB AC gain, 1 kHz) |
Current Input |
Mode |
Low Noise (10E8 V/A) or Wide Bandwidth (10E6 V/A) |
Full-scale Sensitivity |
|
Low Noise |
2 fA to 10 nA in a 1-2-5 sequence |
Wide Bandwidth |
2 fA to 1 µA in a 1-2-5 sequence |
Frequency Response (-3 dB): |
|
Low Noise |
0.5 Hz < F < 500 Hz minimum |
Wide Bandwidth |
0.5 Hz < F < 50 kHz minimum |
Impedance |
|
Low Noise |
< 2.5 kΩ @ 100 Hz |
Wide Bandwidth |
< 250 Ω @ 1 kHz |
Noise |
|
Low Noise |
13 fA/√Hz @ 500 Hz |
Wide Bandwidth |
130 fA/√Hz @ 1 kHz |
Gain Accuracy |
±2.0% typ, midband |
Either Input Mode |
Line Filter |
Filter can be set to attenuate 50/60 Hz, 100/120 Hz, or both frequency bands |
Max. Dynamic Reserve |
> 100 dB |
Grounding |
BNC shield can be grounded or floated via 1 kΩ to ground |
Signal Monitor Amplitude |
±1 V FS. This is the signal after preamplification and filtering, but before transmission over the optical link |
Output Impedance |
1 kΩ |
Signal Channel - Main Console |
Auxiliary Input |
|
Mode |
Single-ended voltage mode input |
Impedance |
10 MΩ // 25 pF |
Maximum Safe Input |
±12.0 V |
Full-scale |
1 V |
Sensitivity |
|
Signal Monitor Amplitude |
±1 V FS. This is the signal received from the Remote Connection Unit immediately prior to conversion by the main ADC |
Output Impedance |
1 kΩ |
Reference Channel |
Reference Input - Remote Connection Unit or Main Console |
TTL Input (rear panel) |
|
Frequency Range |
0.5 Hz to 150 kHz |
Analog Input (front panel) |
|
Impedance |
1 MΩ // 30 pF |
Sinusoidal Input Level |
1.0 V rms* |
Frequency Range |
0.5 Hz to 150 kHz |
Squarewave Input Level |
250 mV rms |
Frequency Range |
2 Hz to 150 kHz |
Reference Channel |
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 + 1 s |
Reference Frequency Meter Resolution |
4 ppm or 1 mHz, whichever is the greater |
Demodulator and Output Processing |
Output Zero Stability |
|
Digital Outputs |
No zero drift on all settings |
Displays |
No zero drift on all settings |
DAC Analog Outputs |
< 100 ppm/°C |
Harmonic Rejection |
-90 dB |
Output Filters |
|
Time Constant |
10 µs to 100 ks in a 1-2-5 sequence |
Slope (roll-off): |
|
TC < 5 ms |
6 or 12 dB/octave |
TC > 5 ms |
6, 12, 18 or 24 dB/octave |
Synchronous Filter |
Available for F < 20 Hz |
Offset |
Auto and Manual on X and/or Y: ±300% full-scale |
Phase Measurement Resolution |
< 0.01º |
Reference Monitor |
TTL signal at current reference frequency, internal or external |
Oscillator - General |
Frequency |
|
Range |
0.5 Hz to 150 kHz |
Setting Resolution |
1 mHz |
Absolute Accuracy |
± 50 ppm |
Amplitude |
|
Range |
1 mV to 5 V |
Setting Resolution |
1 mV |
Output Impedance |
50 Ω |
Sweep |
|
Frequency Sweep |
|
Output Range |
0.5 Hz to 150 kHz |
Law |
Linear or Logarithmic |
Step Rate |
1 kHz maximum (1 ms/step) |
Amplitude Sweep |
|
Output Range |
0.000 to 1.000 V rms |
Law |
Linear |
Step Rate |
|
Main Console |
20 Hz maximum (50 ms/step) |
RCU |
1 Hz maximum (1 s/step) |
Oscillator Output - Remote Connection Unit |
Amplitude |
|
Accuracy |
±1.0% typ |
Stability |
100 ppm/ºC |
Distortion (THD) |
-80 dB @ 1 kHz and 100 mV rms |
Oscillator Output - Main Console |
Amplitude |
|
Accuracy |
±0.2% typ |
Stability |
50 ppm/ºC |
Distortion (THD) |
-80 dB @ 1 kHz and 100 mV rms |
Data Storage Buffer |
Size |
100,000 data points |
Max. Storage Rate |
|
Fast Mode |
up to 1 MHz (X1, Y1, X2, Y2, ADC1, Demod I/P 1, Demod I/P 2) |