[amsat-bb] Re: AO-51 power up, PL test tomorrow

[Andrew Glasbrenner]

PL is on as of about 2215Z. Before LOS I heard it drop twice for a 
second or two until it heard a valid tone again. This will happen about 
every 120 seconds. Reports are welcome, especially from remote users/areas.

73, Drew KO4MA


Andrew Glasbrenner wrote:
> Well, the PL mode is still off. We'll try again this afternoon.
>
> 73, Drew KO4MA
>
> Andrew Glasbrenner wrote:
>   
>> This evening I shut the 435.150 transmitter off and raised 435.300 to 
>> near 2 watts output. Tomorrow morning I plan to turn on the new PL 
>> routine. This improved routine will turn the downlink on with an 
>> unsquelched uplink when it hears a 67 hz tone. I plan on leaving a tail 
>> of several minutes, so the transmitter will stay on without hearing a 
>> tone for an interval of several minutes.
>>
>> What does this mean for the user? It would be helpful to program in a 67 
>> hz PL tone again, but not absolutely required as long as someone else in 
>> the footprint does. It also means if you are the first person in the 
>> footprint (not very likely in North America, Europe, or Japan) you might 
>> not hear the satellite until after it hears 67hz for a few seconds.
>>
>> If all goes well, we'll continue this mode through the mode change 
>> Sunday night. Reports from when the downlink turns on or off would be 
>> appreciated.
>>
>> 73, Drew KO4MA
>> AMSAT-NA VP Operations
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>>   
>>     
>
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