[App_rpt-users] Gm300 have to set the rxondelay very high

[Skyler F]

Huh. I am running discriminator and flat TX. Did you ever test it simplex
or was it only full duplex with two separate radios?

On Wednesday, June 29, 2016, Corey Dean <n3fe at repeater.net> wrote:

> I have never had this issue and I run mine on DSP.  Discriminator on rx
> and flat tx audio.
>
> Corey  N3FE
>
> On Wed, Jun 29, 2016 at 11:20 AM, Skyler F <electricity440 at gmail.com
> <javascript:_e(%7B%7D,'cvml','electricity440 at gmail.com');>> wrote:
>
>> If I use software PL/CSQ decoding, I was getting reports of something
>> coming back from the node after they unkey.
>>
>> Turning RXondelay up to about 6 (6 increments of 25ms) it worked great
>> until I tuned to the bottom of the 2-meter band and I had to turn it all
>> the way to 15 to avoid problems. It's fine unless someone quick Keyes and
>> then I will loose the beginning of their voice.
>>
>> This is a simplex GM300 node, so I am guessing there is a lack of high
>> frequency noise immediately after I unkey. What I don't get is why it is
>> worse at the bottom end of the VHF band. I guess the VFO is sick down there
>> and takes longer to activate?
>>
>> On my UHF GM300, I can get away with rxondelay set to 5 at 446.000. I
>> haven't tested lower, but I won't be transmitting below 445.0
>>
>> There is a variable inductor that I found near the receiver chip which
>> actually improved tuning it from what I was initially getting, needing to
>> set rxondelay all the way up to 25. (It's near the squelch pot)
>>
>> I am going to use COR  from the radio anyway so I won't have the
>>  problem, but I was planning on modding one for 9600 baud which could never
>> deal with the horrible TX/RX switching time that I am getting.
>>
>> Any experience with this issue here? Also, It's annoying that I have to
>> run rxondelay, I wish it could just ignore the receiver immediately after
>> the transmitter drops, no other time. Is there any other setting?
>>
>> 73
>> Skyler KD0WHB
>>
>>
>>
>> --
>> Skyler Fennell
>> amsatnet.info
>> KDØWHB
>> electricity440 at gmail.com
>> <javascript:_e(%7B%7D,'cvml','electricity440 at gmail.com');>
>>
>>
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>

-- 
Skyler Fennell
amsatnet.info
KDØWHB
electricity440 at gmail.com
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