Thanks for that update Barry. I have to yet visited firmware v3033x11 but will
with the O2 that is arriving today.
That is, if the version at TenTec.com will run. I have had difficulty with the
Omni VII updater the last time I tried it. I had to use a Pegasus updater and
the 588.RUF firmware to get things to work.
73
Gary
W0DVN
> On Feb 9, 2017, at 8:19 AM, Barry N1EU <barry.n1eu@gmail.com> wrote:
>
> With the latest 566 firmware ( v3033xE11), the "Other" menu provides the
> option for the S-meter action to be independent of AGC, so choosing this
> will take AGC out of the equation.
>
> If the TX power meter seems to be fairly accurate, just follow the s-meter
> alignment procedure given here:
> http://tentecwiki.org/lib/exe/fetch.php?media=s-meter_565.pdf
>
> Barry N1EU
>
> On Thu, Feb 9, 2017 at 9:14 AM, Dukes HiFi <dukeshifi@comcast.net> wrote:
>
>> R340 on the A7 board is an A to D sensitivity adjustment for the meter, as
>> you had surmised.
>>
>> However, it acts to adjust both the S meter sensitivity (at full scale)
>> AND the TX power meter at 100 watts output. In fact, the only way to
>> correctly set this meter adjustment is to operate the radio at 100 watts
>> into a proper 50 ohm dummy load with an external wattmeter and set the
>> meter in the Orion to read the same as the external meter reads. To be fair
>> on this adjustment, I had asked Ten Tec the year after I got my first brand
>> new Orion why its output reading did not agree well with my Bird except at
>> 100 watts. The engineer told me that this was as good as any cared and that
>> the power settings other than 100 watts were only “relative readings”. No
>> effort was ever made to put a simple calibration curve for the meter and
>> its sensor into the radio’s firmware.
>>
>> Likely what is causing your S meter zero issue when powered on is the AGC
>> threshold in the AGC program modes. This adjustment allows you to, in
>> effect, change the level at which AGC action begins to occur. In the
>> process, the S meter zero comes up to reflect this change as the meter now
>> indicates the preset ACC threshold rather than the zero signal meter
>> reading. You can easily correct this by setting the AGC threshold in the
>> AGC menu to something close to zero. It is independently adjustable for all
>> three ACG options. Of course, you will hear more noise as well.
>>
>> Hope that helps.
>>
>> Gary
>>
>> W0DVN
>>
>>
>>
>>> On Feb 9, 2017, at 2:44 AM, garyh <k4mt1950@charter.net> wrote:
>>>
>>> Th S meter zero is proper when the radio is turned off. When its on the
>> S meter reads about S3 even with RF gain at 100. I noticed in the
>> schematics a meter adjust pot on the A7 ADC schematic R 340. I am not sure
>> if that would do the job.
>>>
>>>
>>> Gary K4MT
>>>
>>> _______________________________________________
>>> TenTec mailing list
>>> TenTec@contesting.com
>>> http://lists.contesting.com/mailman/listinfo/tentec
>>
>> _______________________________________________
>> TenTec mailing list
>> TenTec@contesting.com
>> http://lists.contesting.com/mailman/listinfo/tentec
>>
> _______________________________________________
> TenTec mailing list
> TenTec@contesting.com
> http://lists.contesting.com/mailman/listinfo/tentec
_______________________________________________
TenTec mailing list
TenTec@contesting.com
http://lists.contesting.com/mailman/listinfo/tentec
|