Re: [Hamlib-developer] IC7300 output power

[Sakari N. <sak...@ni...>]

Ok!


Let's see what happens after compiled the latest one.



Power commands were a bit complicated to understand in first place (from 
man page), but various tests showed up that:


*mW2power 'Power mW' 'Frequency' 'Mode' *       --- returns the setting 
of IC7300 power knob 0.0-1.0  I.E. 0-100%

*power2mW 'Power [0.0..1.0]' 'Frequency' 'Mode'*  --- returns the 
*expected* power output with power(knob) value %0-100 on used band/mode


That is *expected* *power*. I.E. when running for example FT8 with low 
audio feed to rig you will get *less power* out than power2mW says.
Value is stable, not depending on PTT state. You get always same result. 
I.E. just using given power knob % and converting it to mW.


*get_level RFPOWER_METER_WATTS*   ---  returns the current output power. 
If PTT is off resut is 0W, if PTT is on result is the measured output 
power.
While having RF power knob at 100% but driving side band modulation with 
low audio level the resulting output power is less than power% and 
*RFPOWER_METER_WATTS *can really show that**when using "normal" Ham 
bands. Except 70MHz that is added afterwards and with used components 
can offer just half of rig's nominal max power.
(Compare that to emergency mode! (menu/set/others/emergency/tuner) It 
would be interesting to test what power values then would be shown!)


Without diving into C, that is not so familiar to me,  I guess the 
measured *RFPOWER_METER_WATTS *conversion does not take on account 
*'Frequency' 'Mode'* combination in all cases I.E. on 70MHz where the 
max output is only half, just like using emergency mode.


-- 
Saku
OH1KH

gm3zza--- via Hamlib-developer kirjoitti 29.5.2025 klo 18.47:
> PS. I applied that patch to the pull I took this morning.
> ------------------------------------------------------------------------
> *From:* Philip Rose via Hamlib-developer 
> <ham...@li...>
> *Sent:* 29 May 2025 4:36 PM
> *To:* ham...@li... 
> <ham...@li...>
> *Subject:* Re: [Hamlib-developer] IC7300 output power
> Hi Nate,
>
>
> Quickly tested - seems OK.
>
>
> Phil
>
>
> On 29/05/2025 16:22, Nate Bargmann wrote:
> > * On 2025 29 May 09:39 -0500, gm3zza--- via Hamlib-developer wrote:
> >> Right, I can see the issue:
> >>
> >>
> >>    1.
> >> The IC-7300 PO meter display %age of maximum power. So 50% max 
> power is displayed as 50%.
> >>    2.
> >> The CI-V returns PO meter reading.
> >>    3.
> >> Both Hamlib and Flrig convert this value to Watts using similar 
> look-up tables. Basically they both follow the display on the rig.
> >>    4.
> >> So for 50% max power gets displayed as 50 W, rather than 25W.
> >>
> >> Unfortunately I don't have an RF Power meter that covers 70 MHz. My 
> 144/432 meter reads 8W at 50% max power on 70 MHz.
> >>
> >> Interesting asides:
> >>
> >> The code for IC-9700 (IIRC in icom.c) divides the calculated power 
> by 10 for the 10 GHz.
> >> The IC-705 when operating on battery (max power = 5W) displays 100% 
> max power, but only returns 50% on CI-V, so both Hamlib and Flrig. 
> Obviously the CAT software doesn't know it's running on battery, so it 
> makes sense for the Icom to handle that change.
> >>
> >> I can implement similar code for IC-7300 on 70 MHz that is there 
> for IC-9700 on 10 GHz.
> > Please do.  Sakari can probably test it.
> >
> > 73, Nate
> >
> >
> >
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