
SG-2000 MANUAL
121
The SGC Building, 13737 S.E. 26th St. Bellevue, WA. 98005 USA
©1995, SGC, Inc.
TEL: (206) 746-6310 FAX: (206) 746-6384
The EXSEL-100 enclosure allows use in automobiles, or alternatively, in base
station installations with transceivers other than the SG-2000. For installation
with units other than the SG-2000, please refer to the EXSEL-100 Interconnection
Diagram for required connections to the transceiver.
19.2
TELEREX™ ARQ/FEC/SELFEC System
The
TELEREX-ST
is an optional sophisticated microprocessor-controlled error-
correcting radio communications data terminal. Despite its considerable
capability, it is extremely easy for the unsophisticated operator to use.
It has been designed primarily for text communication in marine and land based
point-to-point radio links and complies fully with CCIR recommendation 476-4.
It incorporates (optional) Channel Free signal reception and generation, accord-
ing to CCIR recommendation 492-3.
If you have purchased the associated IBM-PC driver software (optional) for the
TELEREX-ST
, you will be almost entirely insulated from the COMMAND code
sequences which are dealt with at length in this manual. Only the initial sections,
covering installation and set up, need be read. From that point, the software is
menu driven. Unless you encounter specific problems, you should not need to
refer to this manual further.
With care in installation and proper attention to the shielding and grounding of
leads, the
TELEREX-ST
should provide many years of reliable service.
The
TELEREX-ST
connects between a radio transceiver and a computer or a
dumb ASCII terminal. Data is passed to the
TELEREX-ST
by means of a serial
RS-232 connection. The computer or terminal must be equipped with a suitable
interface. The unit converts text entered from the terminal into encoded audio
tone signals that are transmitted over the radio link. It also decodes audio signals
from the radio into text to be passed to the terminal, automatically handling all
transmit/receive changeover switching.
MIXED MODE
(Voice-Telex)
OPERATION NOTE:
When using the SG-2000 with the Telerex (or any other data
controller), be sure to remove power from the Telerex unit when
the voice mode is being used in order to avoid the possibility of
transmitting both voice and data at the same time.