[time-nuts] Lady Heather numbers

[Garren Davis]

Hit the f key then the l key.

Garren

-----Original Message-----
From: time-nuts-bounces at febo.com [mailto:time-nuts-bounces at febo.com] On Behalf Of Peter Gottlieb
Sent: Tuesday, February 26, 2013 4:37 PM
To: Discussion of precise time and frequency measurement
Subject: Re: [time-nuts] Lady Heather numbers

How does one set the AMU value with LH?


On 2/26/2013 12:05 AM, Chuck Harris wrote:
> To quote WarrenS:
>
>> To allow the Tbolt to work with weak signals from any antenna that
>> I've tried, even when indoors, I start by setting the TBolt's AMU
>> level from the default of 4 down to 0. This can be done with the
>> Tbolt S/W or LH.
>>
>> My general AMU setting goal is to make it low enough so that the TB
>> is always using a minimum of three satellites. If the TB ever does
>> goes into holdover, that should be fixed, because that will cause
>> some serious freq offset noise at the TBolt's output, The usual
>> holdover fix is to give the antenna a better view of the sky and/or
>> lower the TBolts AMU setting. It is better to set the AMU too low
>> which will allow it to use weak signals all the time than it is to
>> set it too high and have No signals even for a short time.
>>
>> After lowering the AMU value, if you want to optimize the setting, LH
>> has all kinds of tools to help, such as the sat signal strength plot.
>>
>> ws
>
>
>
> -Chuck Harris
>
> Garren Davis wrote:
>>
>> The antenna has a pretty clear view of the sky. I notice that
>> whenever a satellite drops out it causes the oscillator white trace
>> and the DAC green trace to jump around. I wonder why that happens
>> when there are 6 other good satellites.
>>
>> I can go back in time by using the down arrow and I see that it was
>> pretty steady overnight until the furnace turned on to heat up the
>> house. It's amazing how sensitive it is.
>>
>> Garren
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