Specifications

48
8 Serial data IN
(RXD)
Serial command or data input for radio
control or program. It uses asynchronous
data format.
TTL level I/P
9 Speaker filtered
OUT
Audio output from the audio amplifier.
It’s filtered by tone-filter, de-emphasis circuit.
Audio
1KHz audio at 60%
peak system deviation
produces Nominal
1Vrms @ 8Ω
O/P
10 Serial data IN for
option modem
The Serial data to be transmitted is input to
this pin. It’s only available when option
modem board is installed. Inputted data are
modulated by modem IC and then injected to
MOD.
It uses asynchronous data format.
RS-232 level I/P
11 Serial data Out for
option modem
The recovered asynchronous serial data
output from the receiver. It’s only available
when option modem board is installed. It
uses asynchronous data format.
RS-232 level O/P
12 Serial data busy for
option modem
(reserved)
To eliminate data loss according to buffer
overrun of slave MCU’s memory, it indicates
buffer status.
RS-232 level O/P
13 GPS data input Data input for initial setting of GPS module.
It follows NMEA 0183 format and uses
asynchronous data format.
TTL level I/P
14 DGPS data input Data input for DGPS Correction of GPS
module. It follows NMEA 0183 format and
uses asynchronous data format.
TTL level I/P
15 GPS data output Position data output from the GPS module. It
follows NMEA 0183 format and uses
asynchronous data format.
TTL level O/P
Table 8.1. Pin description of DB-15 Connector
DATA MOD IN
1
2
3
4
5
6
7
8
9
10
Data OUT (AF)
PTT IN
GND
SERIAL OUT (PROG.)
BUSY
MIC IN (AF)
SERIAL IN (PROG.)
SPK OUT
SERIAL DATA IN (OPT)
11
12
13
14
15
SERIAL DATA OUT (OPT)
SERIAL BUSY OUT (OPT)
GPS DATA IN (OPT)
DGPS DATA IN (OPT)
GPS DATA OUT (OPT)
DB-15 CONNECTOR
Figure 8.1. Pin-outs of DB-15 connector