PCI 703 User Manual
Eagle Technology - Data Acquisition
Eagle Technology © Copyright 2001-2004 – www.eagledaq.com
24
12
Trigger Mode – Only applies to the reference trigger source. (M0-M3)
0: Positive
1: Negative
2: Rising
3: Falling
Example Layout:
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
M
3
M
2
M
1
M
0
T3
T2
T1
T0
C
7
C
6
C
5
C
4
C
3
C
2
C
1
C
0
Burst
Unsigned long
Not used
Range
Unsigned long
Not used
ChanList
Pointer to an
unsigned long
This is an array of unsigned longs which contains the channels to be sampled when scanning the ADC
sub-system. The max size of the channel list is half the FIFO depth.
GainList
Pointer to an
unsigned long
The gain list contains an array of unsigned longs which sp ecifies the setup for each channel according to
the previous list. The table below shows the format for each channel.
Offset (bits)
Description
0
Specifies the gain of the channel. See
table on ADC gain codes. (G)
8
Specifies the range of the channel. See
table on ADC range codes. (R)
12
Specifies the analog reference.
0: analog in sense pin.
1: analog ground. (F)
Example Layout:
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
F3
F2
F1
F0
R
3
R
2
R
1
R
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.
Digital triggering
If digital triggering is used, pin TRIG1 is used. This pin is active high and will start the ADC
process when it is high. The process will continue until it is stopped via software.
Analog triggering
If analog triggering is used, the voltage on analog output channel 1 is used as reference
voltage. This voltage can be changed at set and the PCI703 will compare the current input
voltage to the ADC system, this can be from any channel included in the channel list, with the
voltage of DAC channel 1. The trigger event can be any of the four settings.
ACTIVEX CALL
Long EDREADX.Configure (plong Channels, plong Gains, long ListSize)
Parameter
Type
Description
Channels
Pointer to a
long
This is an array of longs that contains the channels to be sampled when scanning the ADC sub-system.
The max size of the channel list is half the FIFO depth.
Gains
Pointer to a
long
The gain list contains an array of longs that specifies the setup for each channel according to the
previous list. The table below shows the format for each channel.
Offset (bits)
Description
0
Specifies the gain of the channel. See
table on ADC gain codes. (G)
8
Specifies the range of the channel. See
table on ADC range codes. (R)
12
Specifies the analog reference.
0: analog in sense pin.
1: analog ground. (F)
Example Layout:
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
