Chapter 3: Hardware Configuation and Installation
Manual Number: 00650-014-4
Page 3-1
Chapter 3: Hardware Configuation and Installation
Option Selection
The AD12-8 card features are selected by hardware jumpers. At least one of each of the option
categories must be selected if the card is to operate correctly. The setup program provided on
diskette with the card provides menu-driven pictorial presentations to help you quickly set up the
card.
Analog Input Ranges
The available input voltage ranges are ±10V (4.88 mV resolution), ±5V (2.44mV resolution) or
unipolar 10V (2.44mV resolution). To select the range, install two jumpers on the card; one at the
location labels 10V/5V and one at the location labeled UNIP/BIP.
Range
10V/5V Jumper
UNIP/BIP Jumper
±5V
5V
BIP
±10V
10V
BIP
+10V
5V
UNIP
Figure 3-1: Option Selection Map
Counter/Timer
Three 16-bit Counter/Timers are provided on AD12-8. Refer to the block diagram in
CHAPTER
1: FUNCTIONAL DESCRIPTION
for an understanding of the counter/timer configuration and
to
CHAPTER 8: PROGRAMMABLE INTERVAL TIMER
for a description of applications.
Counter #0 is fully accessible to you for event counting, pulse or waveform generation, frequency
or period measurement, etc. Counter #1 and Counter #2 are intended for software-programmed,
timed A/D start. The time between measurements may be programmed to almost three hours.
Counter #0 has its clock, gate, and output lines available on the I/O connector. Also, the Counter
#0 clock input can be the Counter #1 output if a jumper is installed at the location labeled CLK0.
The Counter #0 gate is pulled up to +5V by a resistor.
The clock for Counter #1 is supplied from a 1/32 multiple of the 14.31818 MHz color oscillator.
Counter #1s gate is available on the I/O connector and, like the Counter #0 gate, is pulled up to
+5V by a resistor. The Counter #1 output is accessible at the I/O connector and, is also connected
to the Counter #2 clock input. The Counter #1 output may also be supplied as a clock input to
Counter #0 if the CLK0 jumper is installed as noted above.
