I had the misfortune of using those very PCTEL antennas in a timing
application and excessive gain was a problem with the loss of frame sync
whenever the receiver had too much signal from any satellite. It was a
highly intermittent problem that appeared every few days; always after I
had tested and
OK, lesson learned: check all conditions. The test system was
feeding 3V rather than 5V to the antenna. Once the correct voltage
is used, the characteristics make more sense. In fact, with a 25 ft.
LMR-195 lead-in the VIC-100 gives almost unchanged SNR with 25dB
attenuation added, -3dB with
Yes, more correctly I used 2 power inserters, one each way, to shunt
the antenna power around the attenuator so that the antenna is
powered and the GPS receiver sees the antenna as connected.
David
At 08:50 PM 1/14/2009, you wrote:
>And I did not make myself clear.
>
>If you were using power in
And I did not make myself clear.
If you were using power inserters, I expect one was used coming from
your GPS receiver and you shunted the DC voltage around the attenuator
and re-inserted DC voltage back to the antenna.
Brian Kirby wrote:
> Can we clarify, you were using the DC blocks or wer
Can we clarify, you were using the DC blocks or were they power inserters ?
Brian
David McGaw wrote:
> Hello Gents (and Ladies),
>
> I am in a bit of a quandary. I have been using a Synergy Timing 3000
> GPS antenna in a test set-up for some time and recently got a VIC-100
> antenna, thinking
Reid, John H wrote:
> Message: 3
> Date: Wed, 14 Jan 2009 14:52:32 -0500
>
> Hello Gents (and Ladies),
>
> I am in a bit of a quandary. I have been using a Synergy Timing 3000
> GPS antenna in a test set-up for some time and recently got a VIC-100
> antenna, thinking that its greater spec-sheet ga
Message: 3
Date: Wed, 14 Jan 2009 14:52:32 -0500
Hello Gents (and Ladies),
I am in a bit of a quandary. I have been using a Synergy Timing 3000
GPS antenna in a test set-up for some time and recently got a VIC-100
antenna, thinking that its greater spec-sheet gain (38dBi vs 25dB(i?)
typical) w
Hello Gents (and Ladies),
I am in a bit of a quandary. I have been using a Synergy Timing 3000
GPS antenna in a test set-up for some time and recently got a VIC-100
antenna, thinking that its greater spec-sheet gain (38dBi vs 25dB(i?)
typical) would allow for a longer down-lead in the field if
