Appendix A, SPECIFICATIONS
A-3
Sinusoidal Input
Level 1.0 V rms
Frequency Range 0.3 Hz to 250 kHz
Squarewave Input
Level 250 mV rms
Frequency Range 2 Hz to 250 kHz
Reference Channel
Phase Set Resolution 0.001º increments
Phase Noise at 100 ms TC, 12 dB/octave slope
Internal Reference < 0.0001º rms
External Reference < 0.01º rms @ 1 kHz
Orthogonality 90º ±0.0001º
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
Demodulators 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/ºC
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 > 10 ms 6, 12, 18 or 24 dB/octave
Synchronous Filter Available for F < 20 Hz
Offset Auto/Manual on X and/or Y: ±300% F.S.
Phase Measurement Resolution 0.01º
Reference Monitor TTL signal at current reference frequency,
internal or external
Oscillator - General
Frequency
Range 0.001 Hz to 250 kHz
Setting Resolution 1 mHz
Absolute Accuracy ± 50 ppm
Amplitude
Range 1 µV to 5 V
Setting Resolution 1 µV when set to less than 1 mV
10 µV when set between 1 mV and 40 mV
250 µV when set between 40.001 mV and 1 V
1.25 mV when set between 1.000001 V and 5 V
Accuracy ±0.2% typ
Stability 50 ppm/ºC
Distortion (THD) -80 dB @ 1 kHz and 100 mV rms
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