Справочник Пользователя для USA Alinco Branch DR-135T

8. PACKET OPERATION

NOTE:

• Never connect a PC directly to the DSUB-9 connector if EJ-41U is not installed. It may

cause the unit to malfunction.

• The local system, transmission and reception environment may easily cause troubles in 9600bps

packet mode. A connection error may frequently occur unless the communication is established
at very high signal strength.

• When the DATA input level is far off from the specification (1200bps=100mVrms/600ohm,

9600bps=400mV/600ohm), it causes poor S/N ratio and distortion, as such the data will not be
exchanged properly.

• When the radio is in the data mode (packet/APRS

), selective calling tones such as DCS and

CTCSS won’t be transmitted.

[To operate APRS

]

APRS

is a trademark of Mr. Bob Bruninga, WB4APR. Using the designated APRS frequency in

your area, and a system composed of the transceiver, EJ-41U (or TNC) a computer and/or a GPS
receiver, you may monitor and exchange various geolocating information on the PC and on the
internet. Details are available from Internet sites.

The radio is capable of being connected to an EJ-41U (or TNC), PC and GPS receiver. To enjoy
APRS operation, a GPS receiver, computer and APRS software are required in addition to the
packet (data) operation system previously mentioned. Purchase a NMEA (National Marine Elec-
tronics Association) compatible GPS receiver with a data output port.
• Specifications required for the GPS receiver: NMEA-0183, 4800bps/without parity bit/data length

8 bit/ stop bit 1bit

•1200bps

Connect Pins 4, 5, 7, 9, and 1 and 8 also depending on the requirement. It enables a conventional
1200bps packet mode.

•9600bps

Connect Pins 2, 3, 5, 7, and 1 and 8 also depending on the requirement.

Press FUNC key, while F icon is on, press SQL. [

] appears on LCD and enables 9600bps

packet mode.