If your unit is exactly like that on ebay 251226027893, it has a 10 MHz
HP oscillator in a double oven, and it's absolutely sure that it's got a
6 channel receiver.
I should have read before, sorry.
I'm still not sure about your antenna, is it a Garmin? Well, it's most
likely an active type, so what gain does it have? If you installed it on
a roof top, it should see sufficient field strength.
Then do that simple test: disconnect your antenna from the receiver unit
and measure with a multimeter the voltage at the center pin of your N
connecter antenna plug. It has to show 5 Volts, otherwise your antenna
can't be working well.
Volker
Am 28.02.2013 01:26, schrieb Volker Esper:
Hi Claude!
Said says, you should see 6+ sats, I guess he means _at_least_ six.
I'm almost sure, you've got a 6 channel receiver, so you naturally
cant't get more than 6 sats at a time.
There are some different models of the Z3805A out there, though
they're all named the same. I've got two units, one with an 8 channel
and one with a 16 channel receiver. My 8channel unit never receives
more than 6 sats at a time, never. So I'm shure, it's a 6 channel type...
Maybe I should improve my antenna. But the same antenna provides
enough voltage to receive 12 to 14 sats at once with the 16 channel
unit. On the other hand, my 6/8 channel gizmo very rarely shows less
than 6 sats, so, like Said, I too think, that there is some space for
improving your antenna. What antenna do you have?
One day, while using the 16 channel unit, I experienced the same hops
as you did. All time nuts told me that it had to be a crystal jump. I
read about such phenomenons and all I found was, that the jump in my
receiver was too big to fit to the idea of a crystal jump.
Unfortunately my receiver gained fun in jumping. Now I'm absolutely
not sure what it is. Maybe it's a faulty oscillator. Which one do you
have built in? A 5 or a 10 MHz type? I've got a 10 MHz HP and a 5 MHz
Symmetricom oscillator.
Cheers
Volker
Am 28.02.2013 00:17, schrieb Claude Fender:
Hello,
This is my first message here although I read this list for a few weeks.
I bought a Z3805A/58503A frequency receiver and I didn't notice on
the pictures that the model number was not written on the front
panel. It's not important but is there a reason for that, if you know ?
The item :
http://cgi.ebay.fr/ws/eBayISAPI.dll?ViewItem&item=251226027893
I log some parameters of the receiver and today I notice a "gap" in
the frequency.
Picture : http://uppix.net/e/2/4/cf39ac772e5a69fc616f5cf30f208.png
I have a Rubidium and I measure it's frequency with a 5334B counter
locked to the GPS, and I can see the "gap" too :
http://uppix.net/f/b/a/d86c2737ad135264e4a2b78e503d5.png
measurements are with Gate Time of 10s, 60s and 100s,
Do you know why this happens and how to prevent this behaviour ?
Thanks for yours advices
Claude
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