Developers Kit
Preliminary
17
J3-J9 Level Translator Settings
If a PC will be used as the OEM server or client host, then level conversion must be enabled to
convert from the RS-232 levels at the PC to the 5 Volt TTL logic levels used on the radio. To enable level
conversion, place jumpers J3-J9 on pins 2 and 3, see Figure 3. If another device (0-5 volt TTL logic levels)
is to act as the Host for the radio then the user must disable level conversion. To disable level conversion,
place jumpers J3-J9 on pins 1 and 2 see figure 4.
If running under Windows, jumper J6
(PKTMODE/RTS) must be removed.
Figure 3. Level Translation Enabled
Figure 4. Level Translation Disabled
Note: If level translation is enabled it is important to note that the signal level will be inverted at the
interface connector, J1, between the OEM radio and the Serial Adapter Board.
Figure 5. Jumper Definitions.
5.1.1
Serial Adapter Board Pin Definitions
DB-9
Signal Name
Associated
40-pin connector 40-Pin Header Strip
(RS-232C)
Level Translation
to radio
Test Points
Pin #
At DB-9 Connector
Jumper
Pin #
Pin #
1
DCD not used
J9
NC
35
2
RX Data
J3
14
14
3
TX Data
J4
16
16
4
NC
5
Ground
1,20,21,40
1,20,21,40
6
NC
7
PKTMODE/RTS
J6
27
27
8
Clear to Send
J5
23
23
9
NC
NC
NC
5.2 Software Utilities
Jumper Associated Serial Signal
From DB-9
J3
RX Data
J4
TX Data
J5
Clear to Send
J6
PKTMODE/RTS
J7
NA
J8
NA
J9
DCD not used
