User manual

5.0 Digital Communication Modes
Basically, the SG-7200 consists of an embedded DOS system with an integrat-
ed DSP coprocessor. Instead of the usual hard disk or floppy disks, the DOS
system boots off a Flash ROM disk. Thus, familiarity with PCs and DOS is
valuable when working with the SG-7200.
When the SG-7200 is first powered up, the usual PC boot-up-process happens;
hardware tests (POST), followed by booting DOS and finally, the stored CON-
FIG.SYS and AUTOEXEC.BAT. These files are all stored on Flash ROM,
which is organized much like a floppy disk drive, except that it is not as conve-
5
© 1999 SGC Inc
SGC Inc. SGC Building, 13737 S.E. 26th St. Bellevue, WA. 98005 USA
P.O.Box 3526, 98009 Fax: [phone] or 746-7173 Tel: [phone] or 1-800-259 7331
E-mail: [e-mail] Web site: http://www.sgcworld.com
D RADIO 2 8-pin DIN for 1 TX Transmit audio out
Radio #2
2 GND Frame ground
3 PTT Push to talk
4 RX Received audio out
5 Currently unused
6 FSK OUTFrequency shift keying
7 DOWN Frequency control down
8 UP Frequency control up
E RX2 1/8” mini jack for audio monitor
F AUX/FSK 5-pin DIN for 1 FSK-N Freq. shift keying normal
auxiliary 2 GND Frame ground
connection 3 TX Transmit audio out
4 FSK-R Freq. shift keying reversed
5 RX Receive audio in
G HF RADIO 8-pin DIN 1 TX Transmit audio out
CONTROL 2 GND Frame ground
(TTL levels) 3 PTT Push to talk
4 RX Receive audio in
5 Not currently used
6 RTS Request to send
7 CTS Cleared to send
8 BI DIR Bi-directional serial
SERIAL
H HF RADIO Either G or H may be selected. When H is selected, may
CONTROL be used with either RS232 Radio connection or a
RS-232 remote computer COM port.
I HOST Connect to remote computer.
C O M P U T E R
RS-232
J RESET Hardware reset
Illustration Connection Connection Pin Name Pin Description
Legend Name Description