Solartron Mobrey 3595 4C, User Manual

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3595 4C User Manual Part Two IMP Commands
35952350 (CH01/AA)
1-35
1.3.5 COMMANDS FOR DIGITAL MEASUREMENTS ONLY
CH RA
(set CHannel sample RAte)
CH n RA d
Where: n is an integer that defines the channel number, in the range 1
≤
n
≤
20
d is an integer that defines the sample rate, in the range 1
≤
d
≤
4
Note: This command applies only to IMP types 1H, 1J and 2A. In the case of the 1H and 1J IMP
types, the command applies only to channels 19 and 20.
Function: Sets the sample rate for the specified channel. The sample rates selectable are listed in
Table 1.15. On power-up, the IMP selects the default sample rate. This rate is suited to
mode of operation, as shown in Table 1.16.
At the sample rates of 20Hz and 1kHz, a level change is detected only if four consecutive
samples are the sample value. This improves immunity against contact bounce and similar
effects. Note, however, that the time recorded for event capture is four sample periods ‘late’
at the lower sample rates.
Response: None.
Table 1.15: Sample rate settings
Rate setting (d) Sample rate selected
0 Default (as on power-up)
1 20Hz
2 1kHz
3 10kHz
4 100kHz
Table 1.16: Default sample rates
Mode Default Sample Rate
Digital status 20Hz
Event counting 1Hz
Event capture 1kHz
Frequency 100kHz
Period 100kHz
One-shot time 100kHz