New Focus 3501 - 11 Specifications; Chopping Frequency; Internal Synthesizer

45
Chopping Frequency
Wheel Min. Freq. Max. Freq. Jitter (µs p-p)
(F
outer
)(F
outer
) @ Min. Freq. @ Max. Freq.
60 120 Hz 6.40 kHz 60 2
42/30 84 Hz 4.48 kHz 50 2
7/5 14 Hz 746 Hz 500 3
2 4 Hz 213 Hz 500 5
Internal Synthesizer
Stability 100 ppm after one hour warm-up.
Drift Less than 10 ppm/°C.
Accuracy < 1/5 of least significant digit.
Resolution 4.00 Hz - 99.9 kHz, 3 significant digits.
Range limits (INT) Upper: [Highest wheel frequency]·S/H.
Lower: [Lowest wheel frequency]·S/H.
Range limits (EXT) 4.00 Hz - 99.9 kHz.
Reference Input
Sync Input TTL level pulse, with same frequency limits as
internal oscillator.
XI
Specifications
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