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Pin Descriptions—
RS/EIA-232 Mode
MDS 05-4670A01, Rev. E
4.7 COM2 (Data) Connections
The
port (Figure 14) is used to connect the radio to an external
COM2
DTE telemetry device supporting the EIA/RS-232 or EIA/RS-485 (bal-
anced) format, depending on how the radio is configured. Typically, a
straight-through DB-9 cable is used to connect to
ports data rates of 300, 1200, 2400, 4800, 9600, 19200, 38400, 57600,
and 115200 bps (asynchronous data only). The following data formats
are supported:
Character Bits
8
8
8
8
8
8
7
7
7
7
7
7
Table 7 and Table 8 provide detailed pin descriptions for the
port in RS/EIA-232 mode and RS/EIA-485 mode, respectively.
NOTE:
Make sure the PORT setting from the PORT command matches the
type of interface you are using (RS-232 or RS-485). The default is
RS-232.
NOTE:
To prevent unintended keying of the transmitter on RTS, set
to
RTSKEY
OFF
5
1
9
6
Table 7 lists the
COM2
RS/EIA-232 mode.
NOTE: The radio is hard-wired as a DCE device.
SD Series Reference Manual (x710 Mode)
Table 6. Data Formats
Parity
No
No
Odd
Odd
Even
Even
No
No
Odd
Odd
Even
Even
, or
do not connect to Pin 7 (RTS) of the
Figure 14. COM2 Connector (DB-9F)
As viewed from outside the radio
port pin functions when configured to operate in
. The radio sup-
COM2
Stop Bits
1
2
1
2
1
2
1
2
1
2
1
2
data
COM2
COM2
port.
15
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