To Set Up Output Ports
Note:
All of the components mentioned below are for the port section of the HVCX1 board
labelled OUTPUT.
1. Locate the two 5-port sections (one in the right end, one in the left end) of the HVCX1 board labelled
OUTPUT.
2. Place the 2596 IC chip into the IC input socket of the port being configured. The notched end of the IC
must be to the left (see above figure for the proper orientation).
3. When configuring the option for high voltage, install the 27K SIP (single in-line) pack pull-up resistor
network (labeled 9X-1-273) in the SIP socket in the OUTPUT section. Make sure Pin 1 of the SIP
pack, as denoted by the square dot, is toward the left (see above figure for the proper orientation). This
pin must be connected to an external voltage supply in order to achieve the desired logic level.
4. Verify that no components (the 2596 and DIP pack) are in the INPUT section of a port being
configured as an output. Having components for the output and input installed in the same port will
cause damage to the unit.
To Set Up Handshaking Output Lines
With the HVCX1 option, the Digital488/80A handshaking outputs (Trigger, Inhibit, Strobe and Clear) can
be set. The user-defined voltage is the voltage supplied through Pin 48 of the channel (voltage is the same
as the data lines for ports configured as outputs). Handshaking output lines are changed as a group and
cannot have their sense reconfigured; handshaking inputs are always inputs, and handshaking outputs are
always outputs. There is one group of handshaking output lines per channel (i.e. CH0 has handshaking set
and CH1 has handshaking set). Handshaking may be done at TTL levels even if digital I/O is set for a
higher range.
14 Digital488/80A Setup
Digital488/80A User's Manual
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