16
DB-15
CONNECTOR
to SD-160
DB-9
CONNECTOR
for Data Communicaiton
DB-9
CONNECTOR
for Radio Control
through Serial command
1
2
3
4
5
6
7
8
9
1
2
3
4
5
6
7
8
9
RxD
RTS
TxD
CD
CTS
3
4
5
6
8
10
PTT IN
GND
SERIAL OUT (PROG.)
BUSY
SERIAL IN (PROG.)
SERIAL DATA IN (OPT)
11
12
SERIAL DATA OUT (OPT)
SERIAL BUSY OUT (OPT)
GND
GND
RxD
TxD
DB-15
CONNECTOR
for Data
Communicaiton
for Radio Control
through Serial
command
RS-232
level
converter
DB-9
CONNECTOR
DB-9
CONNECTOR
Figure 5.2. Interface cable for data communication and radio control
5.2. Configuring the SD-160
In case of mobitex application, which is an international and open standard for dedicated
wireless data for professional users, all timing is decided by recommendation of
network system. But, this radio does not use a specific network system. For this reason,
timing parameters will be tuned by the user to fit their own system realization.
5.2.1. Data Transmission (Tx)
If the SD-160 receives data from a DTE, the Master MCU of the SD-160 will get RF
stage to prepare for a transmission. In this case, proper timing is required to stabilize
the RF stage (ex. PLL lock time, Power-up time, and etc.). To prevent data loss,
inputted data will be saved in the internal memory, called a buffer, in the slave MCU of
