User's Manual

05-4669A01, Rev. B MDS SD4 Startup Guide 13
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Figure 8. Internal Spectrum Analyzer Display
COM1/COM2 REFERENCE
COM1 CONNECTIONS
The COM1 connector is used to connect a PC to the radio for manage-
ment or diagnostics. A straight-through cable is required that connects
Pin 2 (RXD), Pin 3 (TXD), and Pin 5 (Ground). (See Figure 9.)
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Figure 9. COM1 Wiring to Computer
NOTE: To prevent unintended keying of the transmitter during
management activities, set
PTTSIG to OFF, or do not
connect to Pin 6 of the COM1 port.
RXD
TXD
GND
2
3
5
RXD
TXD
GND
2
3
5
>
<
DB-9 FEMALE
(COMPUTER)
DB-9 MALE
(RADIO SIDE)