5
10-2-1
FILE command ----------------------------------------------------------------------- 39
10-2-2
LIST command ------------------------------------------------------------------------ 39
10-2-3
MINE command ----------------------------------------------------------------------- 39
10-2-4
READ command ---------------------------------------------------------------------- 40
10-2-5
WRITE command --------------------------------------------------------------------- 40
10-2-6
KILL command ------------------------------------------------------------------------ 40
10-3 Message Board related LED --------------------------------------------------------------------- 40
10-3-1
MBODLED terminal (CP9 pin) ------------------------------------------------------ 40
10-3-2
MAILLED terminal (CP0 pin) ------------------------------------------------------- 40
10-3-3
MAIL command ------------------------------------------------------------------------ 40
10-4 Message operation command (for --------------------------------------------------------------- 40
10-4-1 W command ---------------------------------------------------------------------------------------- 40
10-4-2 B command ----------------------------------------------------------------------------------------- 41
10-4-3 F command ----------------------------------------------------------------------------------------- 41
10-4-4 M command ---------------------------------------------------------------------------------------- 41
10-4-5 L command ----------------------------------------------------------------------------------------- 41
10-4-6 R command ----------------------------------------------------------------------------------------- 41
10-4-7 A command ----------------------------------------------------------------------------------------- 41
10-4-8 J command ------------------------------------------------------------------------------------------ 41
10-4-9 K command ----------------------------------------------------------------------------------------- 41
10-4-10 H command --------------------------------------------------------------------------------------- 41
11 Miscellaneous commands -------------------------------------------------------------------------------- 42
11-1 Reset / Initialization -------------------------------------------------------------------------------- 42
11-1-1 RESTART command ------------------------------------------------------------------------------ 42
11-1-2 RESET command ---------------------------------------------------------------------------------- 42
11-2 Display the parameter status ---------------------------------------------------------------------- 42
11-2-1 DISPLAY command ------------------------------------------------------------------------------- 42
11-3 date/time setting and display set------------------------------------------------------------------- 42
11-3-1 DAYTIME command ------------------------------------------------------------------------------ 42
11-3-2 DAYUSA command ------------------------------------------------------------------------------- 42
11-3-3 DAYSTAMP command --------------------------------------------------------------------------- 43
11-4 RAM check command ----------------------------------------------------------------------------- 43
11-4-1 RAMTEST command ----------------------------------------------------------------------------- 43
1. Description
The communication protocol of this unit is compatible with AX.25 version 2 Level 2. This enables a reliable
connection with CRC check and the re-try function. It is also capable of transmitting without being connected to
a node (unproto mode or beacon mode). This protocol is identical to the one conventionally used in a TNC for
Amateur Radio. The 9600 bps non-synthesized serial mode is used to connect to a host (computer or terminal).
The unit is also enhanced with a GPS connection capability. The EJ-50U processes and converts data from a GPS
receiver and re-transmits it as a beacon at predetermined intervals. This advanced feature allows the easy setup of
mobile units for GPS position-reporting systems such as APRS.
