I
NSTRUTECH
C
ORPORATION
ITC-18/PCI
U
SER
’
S
M
ANUAL
2 Controls and Functions
2.1 Front Panel Controls
Circled numbers reference to the diagram of the front panel.
DAC OUTPUT
ITC-18 COMPUTER INTERFACE INSTRUTECH Corporation, Great Neck, N.Y. USA
SIGNAL
READY
0
1
2
3
0
1
2
3
4
5
6
7
ADC INPUT
TTL INPUT
TTL OUTPUT
0
1
2
3
0
1
2
3
2
3
5
4
6
7
8
POWER
1
GROUND
TRIG IN
TRIG OUT
9
Figure 2: ITC-18 Front Panel Controls
1
READY indicator
:
The ready indicator will be illuminated when the
ITC-18
has been properly
initialized by the host computer and the acquisition software. If this indicator is
not illuminated then the
ITC-18
cannot function properly.
2
POWER
indicator
:
The power indicator will be illuminated when the
ITC-18
has been powered on.
The
ITC-18
uses circuitry that will automatically switch the internal power
supply when the computer is started or shutdown.
3
DAC
outputs:
Four BNC connectors provide access to the four individual deglitched 16 bit
digital to analog converter outputs. All DAC outputs are thermally stabilized to
reduce drift. The digital to analog converter output voltages and timings are
controlled by the acquisition software. The DAC channels have an output
range of -10.24 to +10.23 volts. These channels are optically isolated from the
computer.
13
