Alinco EJ-50U - Manual (Page 22)

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5-2 Compatible GPS
The following GPS receivers are compatible with the EJ-50U:
(1) SONY’s IPS-5000 series, IPS-3000 series, PACY-CNV10 and other GPS receivers that output the data
starting with [SONY xxxxxx]. The Sony Car-Navigation system receiver that generates a data string starting
with [SMATC xxxx] may work, but we do not guarantee its function, as the format of this string is not
officially published.
(2) NMEA-0183 compatible output GPS receivers.
The output data from the Sony system is 9600 bps, while most other GPS receivers commonly operate at 4800
bps but some are capable of 9600. The EJ-50U can accept either output rate but you must make the appropriate
GBAUD setting.
5-3 Communication environment
Bit-rate: 4800/9600 bps, selected with GBAUD command
Data length: 8 bit fixed
Parity: None fixed
Stop-bit: 1 bit fixed
Flow control is not available. If the PC is connected as a dummy GPS, please loop PC’s CTS and RTC.
5-3-1 Initial parameter setup
The bit-rate can be selected as 4800 or 9600 bps. When the RESET command is used, or the RAM’s back-up
data is deleted, the default settings are done by the hardware.
The CPU’s GPS SEL terminal (80
th pin) determines the default.
When GPS SEL terminal is in [H] position, 9600 bps becomes the default.
GPS SEL terminal is in [L] position, 4800 bps becomes the default.
The status of this pin will be checked when the RESET command is executed or RAM back up is not present. It
does not effect the speed when the system is working properly, or when the RAM back-up is done with the correct
bit-rate setting.
5-4 Contents of GPS data
The EJ-50U analyzes data received from the GPS receiver. Then, based on that data, it converts from one
format to another. When the initial part of the input data and the GPSTEXT command matches, it re-transmits that
data as a LTEXT beacon. It also allows the transmission of a non-compatible format string without the data being
converted.
5-4-1 SONY
The following is a format that is output by the Sony IPS-5000 series. The EJ-50U is able to analyze it, but
cannot re-structure it. It is a 110 bite fixed data string starting with [SONY] and ending with [CR][LF]. It contains
date, time, latitude, longitude, altitude, speed and direction of the GPS receiver and telemetry from the
satellite(s).
Example:
SONY80950716090346N3546569E13918458+02180040139507016090345D4BDHIFGXHbCIRDFFFPEiFHS
CKCQGBRFFeBEDDcCOCHdDH10<CR><LF>
Description:
SONY80 : GPS firmware’s version
950701 : current date