Re: v190c - Parkes update
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From: <Chris.Phillips_at_email.protected>
Date: Wed, 23 Aug 2006 12:12:01 +1000 (EST)
Hi John,
I think I mis-diagosed the plos at first - this is consisant as I see
fringes on DAS2 not DAS1
Cheers
Chris
>
>Problem found, i think: I had set the first (lower) frequency incorrectly
>- it was set to 1650.100 MHz instead of 1650.000 MHz.
>
>This means that for the entire fringe-test and for v190c up to 02:00:34 UT
>the first frequency will be offset by exactly 100kHz.
>
>
>This presumably explains why you found fringes only on one band, although
>it should have been the lower frequency that was affected, not the higher.
>does this make sense?
>
>Apologies for the stuff-up - I'm assuming that 100kHz frequency offset can
>be handled in s/w (though not necessarily in the online checker)?
>
>Cheers,
>John R
>
>On Wed, 23 Aug 2006, Chris Phillips wrote:
>
>>I suggest everyone stop the recorder and setup ready for 11am (01:00 UT
>>start).
>>
>>Please don't run diskclean for the moment - I am still trying to run the
>>frimge checker.
>>
>>Cheers
>>Chris
>>
>
Received on 2006-08-23 12:12:18
Date: Wed, 23 Aug 2006 12:12:01 +1000 (EST)
Hi John,
I think I mis-diagosed the plos at first - this is consisant as I see
fringes on DAS2 not DAS1
Cheers
Chris
>
>Problem found, i think: I had set the first (lower) frequency incorrectly
>- it was set to 1650.100 MHz instead of 1650.000 MHz.
>
>This means that for the entire fringe-test and for v190c up to 02:00:34 UT
>the first frequency will be offset by exactly 100kHz.
>
>
>This presumably explains why you found fringes only on one band, although
>it should have been the lower frequency that was affected, not the higher.
>does this make sense?
>
>Apologies for the stuff-up - I'm assuming that 100kHz frequency offset can
>be handled in s/w (though not necessarily in the online checker)?
>
>Cheers,
>John R
>
>On Wed, 23 Aug 2006, Chris Phillips wrote:
>
>>I suggest everyone stop the recorder and setup ready for 11am (01:00 UT
>>start).
>>
>>Please don't run diskclean for the moment - I am still trying to run the
>>frimge checker.
>>
>>Cheers
>>Chris
>>
>
Received on 2006-08-23 12:12:18