mirror of
https://github.com/saitohirga/WSJT-X.git
synced 2024-11-26 06:08:42 -05:00
56 lines
2.3 KiB
Plaintext
56 lines
2.3 KiB
Plaintext
|
// Status=review
|
|||
|
|
.Receiver Noise Level
|
|||
|
|
|
|||
|
|
- Click the *Monitor* button to return to normal receive operation.
|
|||
|
|
The button will be highlighted in green.
|
|||
|
|
|
|||
|
|
- Be sure your transceiver is set to *USB* (or *USB Data*) mode.
|
|||
|
|
|
|||
|
|
- Use the receiver gain controls and/or the computer's audio mixer
|
|||
|
|
controls to set the background noise level (scale at lower left of
|
|||
|
|
main window) to around 30 dB when no signals are present. If
|
|||
|
|
necessary you can also use the slider next to the scale, but note that
|
|||
|
|
the overall dynamic range will be best with this slider not too far
|
|||
|
|
from its mid-point.
|
|||
|
|
|
|||
|
|
.Bandwidth and Frequency Setting
|
|||
|
|
|
|||
|
|
- If your transceiver offers more than one bandwidth setting in USB
|
|||
|
|
mode, you should normally choose the widest one possible, up to about
|
|||
|
|
5 kHz. This choice has the desirable effect of allowing the *Wide
|
|||
|
|
Graph* to display the JT65 and JT9 sub-bands simultaneously on most HF
|
|||
|
|
bands. Further details are provided in the <<TUTORIAL,Tutorial>>
|
|||
|
|
section.
|
|||
|
|
|
|||
|
|
- If you have only a standard SSB filter you won’t be able to display
|
|||
|
|
more than about 2.7 kHz bandwidth. Depending on the exact dial
|
|||
|
|
frequency setting, you can display the full sub-band generally used
|
|||
|
|
for one mode (JT65 or JT9) and part of the sub-band for the other
|
|||
|
|
mode.
|
|||
|
|
|
|||
|
|
- Of course, you might prefer to concentrate on one mode at a time,
|
|||
|
|
setting your dial frequency to (say) 14.076 for JT65 or 14.078 for
|
|||
|
|
JT9. Present conventions have the nominal JT9 dial frequency 2 kHz
|
|||
|
|
higher than the JT65 dial frequency. A checkbox labeled *+2 kHz*,
|
|||
|
|
just below the *Band* selector, makes the appropriate frequency
|
|||
|
|
settings easy.
|
|||
|
|
|
|||
|
|
.Transmitter Audio Level
|
|||
|
|
|
|||
|
|
* Click the *Tune* button on the main screen to switch the
|
|||
|
|
radio into transmit mode and generate a steady audio tone.
|
|||
|
|
|
|||
|
|
* Listen to the generated audio tone using your radio’s *Monitor*
|
|||
|
|
facility. The transmitted tone should be perfectly smooth, with no
|
|||
|
|
clicks or glitches.
|
|||
|
|
|
|||
|
|
* Open the computer’s audio mixer controls for output (``Playback'')
|
|||
|
|
devices and adjust the volume slider downward from its maximum until
|
|||
|
|
the RF output from your transmitter falls by around ten percent. This
|
|||
|
|
will be a good level for audio drive.
|
|||
|
|
|
|||
|
|
* Alternatively, you can make the Tx audio level adjustment using the
|
|||
|
|
digital slider labeled *Pwr* at the right edge of the main window.
|
|||
|
|
|
|||
|
|
* Toggle the *Tune* button once more to stop your test transmission.
|