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15-6 (E)
SIR-3400H / SIR-3032i / SIR-3032W
15. Data Recording/Playback
15-4. Recording and Playback AUX Digital Data
The unit can record and play back AUX digital data signals and analog data signals simultaneously.
The rotating pulse and trigger pulse can be recorded and played back as the AUX digital data signal.
Internal sampling frequencies for the AUX digital channels are as follows.
Recording/Playback speed Sampling frequencies Ts
4 1536 kHz Approx. 1.5 µs
2 768 kHz Approx. 3 µs
1 (normal speed) 384 kHz Approx. 6 µs
1/2 192 kHz Approx. 12 µs
1/4 96 kHz Approx. 25 µs
1/8 48 kHz Approx. 50 µs
1/16 24 kHz Approx. 100 µs
Table 15-4-1
When make a recording on the AUX digital channel, the signal should conform to the following conditions:
Jitter up to a maximum of one sampling cycle occurs in the rising or falling phases of the original signals
recorded by sampling. Use at an input frequency range where this effect can be ignored.
Example of phase shift caused by sampling
Ts
Tr, Tf
: Minimum hold time
(See Table 15-4-1.)
: Level transition time
(1 µs or less regardless
of recording speed)
Tr Ts Tf Ts
fi
fs
fo
d1 to d4
: Input waveform
: Sampling waveform (Internal clock)
: Output waveform
: Phase-shift (jitter)
d1 d2 d3 d4
Input
fi
Int Clock
fs
Output
fo