[evlatests] New (?) RFI in Ka-band

[Wes Grammer]

30976 MHz is the second harmonic of 15488 MHz, which is one of the L301 
tuning frequencies. A stretch, but was the L301 on any of the antennas 
set to this frequency during the observation?

On 1/15/2021 10:42 AM, Ken Sowinski via evlatests wrote:
> On Fri, 15 Jan 2021, Vivek Dhawan via evlatests wrote:
>
>>
>> on second (or rather the first real) thought, my statement is
>> false if the firstLO is not a exact multiple of 128.
>
> But the first LO is constrained to be a multiple of 128.
> See my email of a moment ago.
>
>> On Fri, January 15, 2021 10:37, Vivek Dhawan via evlatests wrote:
>> | Ken, Rick,
>> |
>> | I believe it cannot be a harmonic of 128, because any of
>> | these falls in a null between subbands, by construction.
>> |
>> | On Fri, January 15, 2021 09:24, rperley via evlatests wrote:
>> | | ... however, I'll note here that no other RFI spikes were seen in 
>> the
>> | | entire Ka band.  So why just this particular harmonic?
>> | |
>> | | Rick
>> | |
>> | | On 2021-01-15 11:14, Ken Sowinski wrote:
>> | |> On Thu, 14 Jan 2021, rperley via evlatests wrote:
>> | |>
>> | |>> New data, taken Tuesday afternoon, reveals an unresolved birdie in
>> | |>> Ka-band.
>> | |>> Frequency = 30.975 GHz.
>> | |>
>> | |> 128*242 = 30976
>> | |>
>> | |> That seems pretty close.
>> | |>
>> | |> Ken
>> | |>
>> | |>> Very strong -- equivalent to a couple of Jy in 128 MHz width.  
>> (That's
>> | |>> BIG).
>> | |>>
>> | |>> Rick
>> | |>>
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