Gilderfluke&Co 16 Bit CD-Quality Digital Audio Systems - Manual (Page 72)

Otherwise it might over run the AB/DR-3000sÕ incoming data buffer.
If you have hooked up the AB/DR-3000s to your computer and it still doesnÕt seem to respond to the
keyboard, the first thing to check is that you are attached to the right serial port. The easiest way to do
this is to disconnect the AB/DR-3000s and short between the Tx data out and Rx data in pins on the serial
port connector on the back of your computer. On all IBMs and compatibles this means sticking a paper
clip or similar ÔtoolÕ between pins 2 and 3 on the ÔCom.Õ connector. While still running the modem pro-
gram, anything you type should appear on the screen while this paper clip is in place, while nothing will
appear when you remove it. If your computer passes this test, then you are using the right serial port
and the problem is most likely the baud rate setting or in your wiring to the AB/DR-3000s. If you get char-
acters on the screen even with the paper clip removed from the serial port, it means you probably need
to set the ÔechoÕ mode to ÔnoneÕ or Ôfull duplexÕ. Then you should repeat this test.
The serial data signals from the AB/DR-3000s are brought out on the six position RJ-11 (modular tele-
phone style) connector labeled 'RS-422 Serial Port'. On the AB-3000s, this is right on the unit's case. For
DR-3000s, you will find this on the back of the CC-3016 or CC-3004 card cages. Facing the end of the
cable with the release latch upwards, its pin out is as follows:
pin # COLOR SIGNAL NAME:
(left) 1 WHITE signal ground
2 BLACK - serial data OUT from AB/DR-3000
3 RED + serial data OUT from AB/DR-3000
4 GREEN - serial data IN to AB/DR-3000
5 YELLOW + serial data IN to AB/DR-3000
(right) 6 BLUE signal ground
PC and Compatible Connection: To cross wire the RS-422/RS-485 signals from the AB/DR-3000 to the
RS-232 serial port of an IBM compatible, cross connect the signals as follows:
DB-25 DE-9 SIGNAL SIGNAL FROM/TO AUDIO SYSTEM
2 3 DATA OUT - serial data IN to AB/DR-3000 (GREEN)
3 2 DATA IN - serial data OUT from AB/DR-3000 (BLACK)
7 5 Ground signal ground (BLUE or WHITE)
Apple Macintosh computers have true RS-422 serial ports built in. To connect to the AB/DR-3000,
the pin out is as follows for a Macintosh mini-DIN-8:
to + serial data in to card (#5 yellow)
to - serial data in to card (#4 green)
1 2
3 4 5
6 7 8
from - serial data out from card (#2 black)
from + serial data out from card (#3 red)
signal ground (#1 blue or #6 white)
The AB/DR-3000 expects to see the serial data in the following format:
ONE START BIT
EIGHT DATA BITS
ONE BIT
There are many methods you can use to access a number of cards in an AB/DR-3000 system at the
same time. If you are controlling the audio through the serial port, you can use any or all of them as
best suits your application. They are:
1) ALL - Any command of this type effects all the cards in the system.
EXAMPLE: A 'START ALL' command will start all the AB/DR-3000s in the system.
2) ADDRESS SPECIFIC - Only the one card addressed by the command is affected by this type of
command. Each card in the system must be configured to respond to a different ADDRESS
NUMBER address in order for the system to operate properly.
EXAMPLE: A 'START CARD#' command will start only the one card addressed by the CARD# in
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