On 24/06/2019 18:46, Dave Slotter wrote:
I was wondering, if WSJT-X uses HamLib, and at least some rigs are
capable of setting and getting the transmit power, why do users have
to fill in the Log QSO Field, "Tx power", manually? Is there a reason
for not implementing this feature?
Hi Dave,
the main reason is inaccuracy. Using AFSK modes allows the power to be
controlled in many ways including using the audio level into the rig.
The power setting on the rig may have little bearing on the actual
radiated power. The rigs that allow metering the power leaving the
transceiver PA could be more accurate but require constant polling of
the Tx power meter level while transmitting. Even if the above were not
an issue, an individual station may be using a PA after the transceiver.
In summary, the user has a much better idea of the radiated power than
any indirect measurement available via CAT commands.
For a counter example, measuring SNR of received signals is far more
deterministic and reliable and we happily support that as an automated
feature in the WSJT-X modes.
73
Bill
G4WJS.
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