[time-nuts] Trimble Thunderbolt - Receive Sensistivity

[John Miles]

The elevation mask might also come into play.  Ordinarily you don't want to
consider input from satellites too near the horizon, as terrestrial features
can distort the signal's timing.

I think it can be stated with confidence that there's nothing wrong with a
(normally functioning) Thunderbolt's sensitivity specs, and that putting
random amplifiers, splitters, and such into the antenna lead might be
counterproductive.

-- john, KE5FX

> -----Original Message-----
> From: time-nuts-bounces at febo.com [mailto:time-nuts-bounces at febo.com]On
> Behalf Of J. L. Trantham
> Sent: Thursday, August 28, 2008 7:39 PM
> To: 'Discussion of precise time and frequency measurement'
> Subject: Re: [time-nuts] Trimble Thunderbolt - Receive Sensistivity
>
>
> When I compared the function of the Thunderbolt to my Z3816A, the
> number of
> tracked satellites was smaller on the Thunderbolt.  However, the Signal
> Level Mask is set to 4.0 on the Thunderbolt.  After I reset it to
> 1.0, they
> tracked the same (and number of) satellites.
>
> This I did with TBoltMon under 'Setup', 'GPS Receiver' which takes you to
> 'Receiver Configuration'.  Change the Signal Level Mask (AMU) to
> the desired
> number then 'Set Receiver'.  I also hit 'Save Segment' though I
> do not know
> if this is a required step.
>
> Joe