MoTeC ACL VIM - Manual (Page 70)

66 Appendices
** Inputs are sampled at 40 kHz, 8 samples are averaged to give a 5 kHz
update rate.
*** This specification only applies if the gains of a group of four inputs are all
set to 1 otherwise the differential range is -3 V to 3 V and the common mode
range is 0 V to 3 V absolute. There are two groups of four inputs; AVD1-4 and
AVD5-8.
# 5th order digital sync filter. The frequency specifies the 3 dB point.
## These inputs are not intended for precision measurements, they are
intended for checking the voltage levels of the speed sensors.
@ Input set to magnetic type.
VIM Pull-up Resistor Pins
The Pull-up Resistor pins R1 to R4 have a 1000 ohms resistor internally
connected to the 5 V sensor supply.
VIM Analogue Input Sampling Times
This table shows the time at which each input is sampled relative to an
arbitrary zero point.
Where multiple VIMs are used, all VIMs are precisely synchronised so that the
same inputs on each VIM sample at exactly the same time.
Input Sample
Time
(usec)
Update
Rate
(Hz)
AV F1 100 5000
AV F2 100 5000
AV F3 100 5000
AV F4 100 5000
AV F5 100 5000
AV F6 100 5000
AV H1 1550 500
AV H2 1800 500
AV H3 50 500