PCI 730 & PC104P-30 User Manual
Eagle Technology - Data Acquisition
Example Layout:
11 10 9 8 7 6 5 4 3 2 1 0
M
3
M
2
M
1
M
0
G
7
G
6
G
5
G
4
G
3
G
2
G
1
G
0
ListSize
Unsigned long
This parameter determines the length the two previous arrays. This is also the depth of the channel list
that is programmed to the board.
The
Frequency
and
ClockSource(If using external trigger)
ADC ActiveX control must be setup
before calling the configure function.
EDREADX.Frequency
Frequency
The ADC sampling frequency
WARNING!!
On the PCI730 the frequency is the
update rate of the A/D converter. This
means that the board will convert the
channels at a period of equal to the
frequency and the channels in the
sequence of the channel list. The end
result is that the time between samples is
equal to 1/Frequency.
Frequency Example:
PCI730
Frequency = 100 000 Hz
Channel List Length = 10
Time for channels list= 100 uS
Time between channels = 10 uS
EDREADX.ClockSource
ClockSource
This parameter is used to configure the clocking system of the ADC.
Format
Offset (bits)
Description
0
Clock Source
ALLWAYS INTERNAL
8
Trigger Source (T0-T3)
0: Internal
1: External
Example Layout:
11 10 9 8 7 6 5 4 3 2 1 0
T3 T2 T1 T0 x x x x x x x x
Starting and Stopping the ADC process
A single call is necessary to start or stop the ADC process
API-CALL
Long EDRE_ADStart (ulng Sn)
Parameter
Type
Description
Sn Unsigned
long
Board’s serial number
Return
Long
Error Code
ACTIVEX CALL
Long EDREADX.Start ()
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