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SunSDR2 PRO User Manual
© 2018 Expert Electronics
REAR PANEL DESCRIPTION
When you press the footswitch, PTT Line connects to the Ground (Case), it turns the
transceiver to TX. A
red
LED TX indicator on the front panel and in the software window,
indicates that the TX mode is on.
Releasing the footswitch returns the transceiver to the RX mode.
St raight Key should be connected to the KEY socket using the mono 6.3 mm Jack. Pressing
the key turns the transceiver to the TX mode and it generates a continuous CW signal (manual
mode).
Releasing the straight key returns the transceiver to the RX mode.
Twin-paddle key (single-paddle) should be connected to the KEY socket using the mono
6.3 mm Jack. Pressing one of the key's paddles (or one side - for single-paddle) will turn the
transceiver to the TX mode and begin automatic generation of dots and dashes.
Releasing the paddle returns the transceiver to the RX mode.
CW key connect ion via COM-port .
CW paddle can also be connected to the COM-port of your PC, according to the picture below.
In the ExpertSDR2 DOT/RTS = DOT/CTS and DASH/DTR = DASH/DSR.
In the ExpertSDR2 you set COM-port pins of your PC, which uses DTR and RTS for keying.
DTR and RTS from PC should be connected to local DSR and CTS pins, which are showed on
the picture with the paddle. DSR and CTS are RX lines (inputs) that is why they used like this.
3.4
External Linear Amplifier
You can connect external Power Amplifiers (PAs) to the transceiver.
It may be required to make several connections depending on the required external PA type.
Connect a 50 Ohm HF cable to the transceiver's antenna connectors A2, A3 or A1 if it's a
VHF PA, connect the other end of the cable to the input of the PA.
To control the TX mode of the external PA you can use the X8 pin terminal of the EXT CTRL
connector (more details in
EXT CTRL devices
).
If an external PA supports operation with the transceiver's ALC system, you can connect it via
cable with RCA-type phono plugs. The ALC voltage range -3...0 V (see the warning below).
Note:
·
While connecting the cables, transceiver and PA should be switched off.
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Содержание SunSDR2 Pro
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