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 ∝s

 

 

 

2

768 kHz

Approx. 3 ∝s

 

 

 

1 (normal speed)

384 kHz

Approx. 6 ∝s

 

 

 

1/2

192 kHz

Approx. 12 ∝s

 

 

 

1/4

96 kHz

Approx. 25 ∝s

 

 

 

1/8

48 kHz

Approx. 50 ∝s

 

 

 

1/16

24 kHz

Approx. 100 ∝s

 

 

 

 

Table 15-4-1

 

When make a recording on the AUX digital channel, the signal should conform to the following conditions:

Ts : Minimum hold time (See Table 15-4-1.)

Tr, Tf : Level transition time (1 ∝s or less regardless of recording speed)

Tr

Ts

Tf

Ts

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.

Input

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

d1

 

 

 

 

d2

 

 

 

 

d3

 

 

 

 

d4

fi

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Int Clock

fs

Output

fo

fi

: Input waveform

fs

: Sampling waveform (Internal clock)

fo

: Output waveform

d1 to d4 : Phase-shift (jitter)

Example of phase shift caused by sampling

15-6 (E)

SIR-3400H / SIR-3032i / SIR-3032W