Tigertronics BayPac BP-96A Installation & Operation

Grants Pass, Oregon

- INTRODUCTION -

The Model BP-96A is an enhanced version of the BayCom
Team's 9600 Baud PICPAR modem, which is sold in
Germany as a kit. The Tigertronics version of this modem
employs "surface mount technology" and comes completely
assembled and tested. This superior technology permits use
of robotic assembly, resulting in a vastly smaller unit with
enhanced reliability and lower cost. Power consumption has
also been improved. In fact, power consumption is now so
low, that the BP-96A can get all of it's operating power from
your computers parallel port!
It should be noted that installation and setup of ANY High
Speed Modem requires some technical expertise and access
to the proper test equipment. Operation at 9600 baud is
much less "forgiving" than 1200 baud, so proper adjustment
of both receive level and transmit deviation is critical for
reliable operation. You will need a radio that is "9600 baud
ready" or one that has undergone appropriate modification
for high speed operation. Normal "voice grade" radios will
not work properly without extensive modification. These
instructions assume that your radio is "9600 baud ready".
Installation of the BP-96A is a two-step process. The first
step involves connecting the unit to your radio and computer.
This document will help you through that process. The
second step involves setting the transmit audio level. In
addition, you will of course need to install BayCom
compatible TNC emulation software on your computer.
BayPac BP-96A Packet Modem
154 Hillview Drive Grants Pass, Oregon 97527
(541) 474-6700 Fax: (541) 474-6703 Internet: http://www.tigertronics.com
Installation & Operation
Currently, only BayCom v1.6 supports 9600 baud operation.
If you did not obtain Version 1.6 when you purchased your
modem and do not already have a copy, you will need to
purchase it separately from the authors or from Tigertronics.
Note that previous (Shareware) versions of BayCom did not
support 9600 baud operation and WILL NOT work with this
modem.
To run the software you will need a 10 MHz (or faster) IBM
AT compatible computer, with a parallel interface port.
Normally, the BP-96A should be plugged directly into the
parallel port connector on the computer. If you wish to
attach the BP-96 to a cable or switch box, you should use a
cable that us FULLY SHIELDED and no longer than 3 feet.
A cable is supplied with the modem for connecting to your
radio. It has a DB-9 male connector on one end. You will
need to install whatever connector is appropriate for your
radio on the other.
sufficient power to the modem, then you will also need an
external power source of 8-14V DC at approximately 10ma.
Figure 1 shows a block diagram of the BP-96A modem. The
modem is connected via six signal lines to the Centronics
interface on the PC. The transmission of the RX and TX
data is done serially since the Centronics interface has only
four input lines.
PC

- WHAT YOU WILL NEED -

If your computer can not supply

- BP-96A BLOCK DIAGRAM -

D/A
FIR-Filter
PTT
Converter
DCD
CLK/16
PIC 16C84
BURST
DCD
Clock Recovery
TXD
Data -
Reconstruction
RXD
Figure 1 - Block diagram of the BP-96A modem.
Analog
LP-Filter
To
Modulator
Analog
LP-Filter
From
Demodulator