2.
Set "PA Configuration Menu", "Tune Tone" to "Single".
3.
Set "PA Configuration Menu", "Tune Power Level" to either "5W" or to "as TX
PWR" and change TX power to "5W"
4.
Enter "PA Configuration Menu", "
xx
m 5W PWR Adjust" (replace
xx
with your
bands 10, 12, ... ,160m). You will be able to change the value for a band only if the
band is selected!
5.
Press F5 - "Tune".
6.
Make sure you see "5W" as power indication in the blue "TX power" box. If not,
see step 3.
7.
Set gain to achieve 5W of output power.
8.
Press F5 - "Tune" again.
TX: Adjustment for Maximum RF Power
Procedure to setup RF power in
Full Power
menu for each frequency band you intend to
use, the standard mcHF supports 160m to 10m operation, although 160m transmit
without additional LPF between PA and antenna is not recommended.
1.
Choose mode LSB or USB.
2.
Set "PA Configuration Menu", "Tune Tone" to "Single".
3.
Set "PA Configuration Menu", "Tune Power Level" to either "Full" or to "as TX
PWR" and change TX power to "Full"
4.
Enter "PA Configuration Menu", "
xx
m Full PWR Adjust" (replace
xx
with your
bands10, 12, ... ,160m). You will be able to change the value for a band only if the
band is selected!
5.
Press F5 - "Tune".
6.
Make sure you see "Full" as power indication in the blue "TX power" box. If not,
see step 3.
7.
Set the gain up to the point, where RF power stays at maximum and only DC
current increases
8.
Reduce the gain back to get approximately 1dB less RF power (down-to 79%). To
avoid possible instability of the PA a setting power back -1.5dB (down to 70%) is
recommended.
Using the integrated two-tone signal generator, you can also adjust for nice looking two
tone signal with an oscilloscope instead of using the above procedure. You will have
lower maximum output power settings when using this method, since it will keep you in
the (more) linear range of the PA.
