mirror of
https://github.com/saitohirga/WSJT-X.git
synced 2024-11-08 10:06:11 -05:00
59 lines
2.5 KiB
Plaintext
59 lines
2.5 KiB
Plaintext
// Status=review
|
||
.Receiver Noise Level
|
||
|
||
- If it is not already highlighted in green, click the *Monitor*
|
||
button to start normal receive operation.
|
||
|
||
- 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. It is
|
||
usually best to turn AGC off or reduce the RF gain control to
|
||
minimize AGC action.
|
||
|
||
+
|
||
|
||
TIP: The PC audio mixer normally has two sliders, one for each
|
||
application attached which should be set to maximum (0dB FS) as
|
||
it cannot help with distortion from overly high or low input
|
||
levels from your receiver and another *Master* level which is
|
||
analogue attenuator on the sound card before the Analogue to
|
||
Digital Converter (ADC). The *Master* level can be used to adjust
|
||
the signal level received by _WSJT-X_.
|
||
|
||
.Bandwidth and Frequency Setting
|
||
|
||
- If your transceiver offers more than one bandwidth setting in USB
|
||
mode, it may be advantageous to choose the widest one possible, up
|
||
to about 5 kHz. This choice has the desirable effect of allowing
|
||
the *Wide Graph* (waterfall and 2D spectrum) to display the
|
||
conventional JT65 and JT9 sub-bands simultaneously on most HF bands.
|
||
Further details are provided in the <<TUTORIAL,Basic Operating
|
||
Tutorial>>. A wider displayed bandwidth may also be helpful at VHF
|
||
and above, where FT8, JT4, JT65, and Q65 signals may be found over
|
||
much wider ranges of frequencies.
|
||
|
||
- 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, on HF bands you can display the full sub-band
|
||
generally used for one mode.
|
||
|
||
.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. Make sure that this is true even when you
|
||
simultaneously use the computer to do other tasks such as email, web
|
||
browsing, etc..
|
||
|
||
* Adjust the *Pwr* slider (at right edge of main window) downward from
|
||
its maximum until the RF output from your transmitter falls
|
||
slightly. This is generally a good level for audio drive.
|
||
|
||
* Toggle the *Tune* button once more or click *Halt Tx* to stop your
|
||
test transmission.
|