b. OFFICE CONFIGURATION.
Figure 1 depicts the system interconnection of the various AVA elements. The major elements of the system
(including cables) are shown in the diagram for the purpose of displaying the extent of the capability of the
AVA, although not all the inputs and units may be necessary for any particular test. The office configuration is
a subset of the equipment shown in the figure. Generally the office configuration consists of a CADU, battery
charger, a printer or host computer, and cables. There is no need for the DAU or associated cables and
sensor for AVA operation in an office. The office configuration would primarily involve interaction between the
AVA CADU and a host computer (transferring measurement data to the host computer and uploading setup
data, programs, etc. from a host computer) or using the CADU to run diagnostics and view displays on
1. Connecting External Power
Failure to observe all safety precautions when
connecting external power to the AVA equipment
can result in injury to personnel. Observe all safety
precautions when connecting external power.
Connect external power to the CADU by connecting the 12 Vdc battery charger to the CADU and an AC
(a) For the wall mounted supply: The 12 Vdc battery charger connects at the top of the CADU under the
credit card slot cover and provides the required power to operate the CADU independent of the DAU
and/or charge the internal battery. Keep the battery charger connected to the CADU whenever
charging the NiCad battery or using the CADU. It is not recommended to be connected for long-term
(b) To verify that external power has been applied: To verify that external power has been applied, turn
on the CADU and press the LAMP key. The lamp will remain ON when the key is released if external
power is available and extinguish if external power is not available.
2. Connecting External Computer
The AVA serial port is dual function. It can either be used to communicate with an external printer, as
described below, or communicate with an external computer either directly or through an external
modem. Typically this external computer will be an IBM PC compatible. Connect an external computer
(a) Connect the serial null modem cable, P/N 28130802, between the RS-232 port on the CADU (the
9-pin connector) and the RS-232 port on the host computer (usually a 9-pin connector). The Gender
Changer, P/N 28130800, and RS-232 Adapter, P/N 28130801, may be required. Cable, gender
changer and adapter are supplied with the basic AVA kit.
(b) The AVA Communication Package (RADSCOM) is available for executing more sophisticated
commands from an IBM compatible computer to the AVA. These commands are described in more
detail throughout various sections of this manual.
3. Connecting Printer
To print out spooled pages (Displays), an external printer can be connected to the CADU printer port.
The CADU provides a RS-232 serial port and a parallel printer port. Use the serial port (9-pin connector)
for the AVA printer and Epson compatible serial printers. Use the parallel port (25-pin connector) for
those printers that have a parallel interface. Connect the printer by attaching the CADU-to-printer cable
between the CADU serial port and the printer RS-232 port. When viewing it from the top edge, the serial
port connector (9 pins) is in the middle of the CADU.
4. Configuring the Printer
To configure the CADU for the printer, go into the MANAGER menu using the F4 key from the main
menu. Use the UP/DOWN arrow keys to highlight the Setup option and select by pressing the DO key.
Then select the option Printer by highlighting it and press DO. Then set port type to either parallel or
serial by highlighting the Change Port option and selecting the appropriate port, and press DO. Select