Setting Up Handler Interface Board; Checking Default Settings - Agilent Technologies 4286A User Manual

Setting up Handler Interface Board

This section describes the steps necessary to use the handler interface board.
There are 3 major steps as follows:
Mounting Pull-up Resistor
Mount a pull-up resistor to the handler. Where to mount a resistor and what resistance the
resistor needs to have depends on the signal I/O format.
Note
A pull-up resistor must be mounted to the handler for comparator signals.
Setting up Handler Interface
Set up the handler interface signal pattern that suits the 4286A operation mode. Set it up on
the 4286A.
The following step is required when the power supplies for I/O or COMMON setting should be
modi ed.
Changing Signal I/O Format
Change the switch setting on the handler interface board to change its signal I/O format.
This is necessary when you need the I/O format that requires the switch settings di erent
from the default settings.

Checking Default Settings

The handler interface board has been set as follows before shipment.
Signals
Comparator Signal
Control Output Signal
DC isolated Input Signal
Internal power source (5V)
See \Handler Interface Board Switches" for default switch settings.
Warning
Be sure to check the procedures in \Removing the Top Cover" before
removing the 4286A top cover.
Settings
This signal is opto-isolated and is output through open-collector.
COM1 is used as COMMON that is isolated from 4286A's chassis
ground. Pull-up resistors are mounted to the handler. Output
voltage is supplied from an external power source (5 to 24V) on
the handler.
This signal is opto-isolated and is output through open-collector.
COM2 is used as COMMON that is isolated from 4286A's chassis
ground. Pull-up resistors are mounted to the handler. Output
voltage is supplied from an external power source (5 to 15V) on
the handler.
This signal is opto-isolated from the internal circuits of 4286A.
Driving voltage is supplied from an external power source (5 to
7V) through EXT.DCV2. This signal turns \TRUE" if input signal
is connected to the COMMON of the external power source.
Not used.
4286A with Chip Handler 4-11