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A-3
Appendix A, SPECIFICATIONS
Orthogonality 90º ±0.0001º
Drift < 0.01º/ºC below 10 kHz
< 0.1º/ºC above 10 kHz
Acquisition Time
Internal Reference instantaneous acquisition
External Reference 2 cycles + 50 ms
Reference Frequency Meter Accuracy
120 kHz > F > 40 kHz ±4 Hz
40 kHz > F > 400 Hz ±0.8 Hz at F = 40 kHz improving to
±0.008 Hz at F = 400 Hz
400 Hz > F > 1 mHz ±0.040 Hz at F = 400 Hz improving to
better than ±0.0001 Hz at F = 1 mHz
Demodulator and Output Processing
Description 2 × 18-bit ADCs driving two DSP elements
managed by a powerful 68000-series host
processor
Output Zero Stability
Digital Outputs No zero drift on all settings
Displays No zero drift on all settings
Analog Outputs < 5 ppm/ºC
Harmonic Rejection -90 dB
Time Constants
Digital Outputs 5 ms to 100 ks in a 1-2-5 sequence
Fast Outputs 10 µs to 640 µs in a binary sequence
Roll-off 6, 12, 18 and 24 dB/octave
Synchronous Filter Operation Available for F < 20 Hz
Offset Auto and Manual on X and Y: ±300 % FS
Oscillator
Frequency
Range 0.001 Hz to 120 kHz
Setting Resolution 0.001 Hz
Absolute Accuracy 25 ppm + 30 µHz
Distortion (THD) -80 dB at 1 kHz