H A R D W A R E I N S T A L L A T I O N
C H A P T E R 1
Note:
Although not necessary, if you prefer to connect your paddles to a
serial port on your PC you may do so using the pin-out shown in
Table 3.
Table 3: PC Serial Port Pin-Out
Serial
Port Pin*
Keyer Signal
4 (DTR)
Common
6 (DSR)
Dot
8 (CTS)
Dash
* Assumes a 9-Pin connector
(3) Microphone Connector
The 8-pin RJ-45 connector offers the ability to connect a microphone and to key the radio via a PTT
line. The pin-out is shown in Figure 2 below
1
. To engage PTT, pin 6 must be grounded to pin 7 (Shield
Ground) and not to pin 4, which is the microphone ground.
Note:
The pins designated as Up, Down and Fast enable the use of (mobile
style) microphones that have these buttons built in to them. Up and
Down will tune the frequency up or down respectively at the rate set
by Tune Step in PowerSDR (see page 37). The Fast button switches
this Tune Step between 50Hz and 1kHz.
Although the FLEX-3000 will work well with many types of microphones, it is conveniently wired to
enable the use of microphones such as the Yaesu MH-31, that include buttons for Up, Down and Fast.
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1
The pin-out is similar to that normally found on Yaesu mobile radios
4
2003-2009 FlexRadio Systems
Figure 2: Pin-out of the MIC Jack
