Hi,
This is a side-track to Pauls original question, but maybe a nice little
point to make now that Peter touched on the subject.
To elaborate a little on C/A and multipath surpression.
The multipath surpression of the receiver depends on code rate,
bandwidth and correlator spacing. P-code is
>
> What should the IF pass band bandwidth be?
>
For GPS C/A with wide correlator, about 2 MHz; if you want Galileo BOC and
(eventually) GPS L1C, or legacy C/A with narrow correlator, about 8 MHz;
for GPS P code about 20 MHz. Books on GNSS software receivers will detail
the many tradeoffs availab
Meinberg down-converter: IF 34MHz:
http://digilander.libero.it/maurit0/transito%20ebay/GPS%20R&S%20Meinberg/gpsant.pdf
73
KJ6UHN
Alex
On 11/30/2015 2:02 PM, Magnus Danielson wrote:
Paul,
Many GPS receivers only use 2,046 MHz bandwidth, but some use the full
20,46 MHz even if they only do C/A.
Magnus you are right.
Its interesting in that several parts are easily available at
semi-reasonable cost.
Mini- circuits has a all in one synthesizer module dsn-2036 for the LO and
they also have very nice IF filters. The BPF-a76 appears to be exactly the
right bandwidth for a GPS IF.
There are som
Guys,
We have published an updated firmware version 1.1 for the M12M Replacement
Receiver that is available from the support page of the Jackson Labs
website:
www.jackson-labs.com/index.php/support
The updated firmware is available under Firmware Downloads and a
description of the improvements ar
Anders
U101 only needs to have a gain of 1 at dc so replace R104 and R105 with a
capacitor connected to ground.
Adjust the other components of the gain determining network accordingly.Also
the junction of the power supply divider R102 and R103 should be heavily
capacitively bypassed to ground an
Paul,
Many GPS receivers only use 2,046 MHz bandwidth, but some use the full
20,46 MHz even if they only do C/A. Guessing that you are working on
down-conversion for an old box, then 2,046 MHz will be your answer.
Cheers,
Magnus
On 11/30/2015 06:37 PM, paul swed wrote:
I am looking at build
Hi
Somethings to consider:
How quiet are the sources you will be running through this amplifier?
How predictable are the levels of the sources?
How important is isolation?
Do you need lowpass / bandpass filtering (are there other RF sources running
around?)?
Is ESD on the coax an issue (d
On Fri, November 27, 2015 9:37 am, Mike Feher wrote:
> the period of the hyperfine transitions must change as well, to
> make the defined second longer or shorter. So, in these examples the
> elevation does not change the time, but the way the atoms behave.
That gets into a philosophical question
I am looking at building a GPS down converter.
LO 1500 Mhz locked to a 10 MHz ref.
The IF will be at 75.42 Mhz how wide should it be?
My question is simple.
What should the IF pass band bandwidth be?
Not sure if it should be 3-4 Mhz, 10 or 15 wide.
Thanks
Paul
WB8TSL
HI all,
I need to build a few distribution amplifiers (>90% for 10MHz, sometimes
maybe 5MHz) and instead of reinventing the wheel I decided to try to
modernize the TADD-1 into an all (almost) SMD design. Here are some draft
sketches:
http://www.anderswallin.net/2015/11/frequency-distribution-amplif
Does anyone know the purpose of the jumper to the left of the three power
supply jumpers. I have one receiver which does a periodic lurch of its time
deviation, but when I fitted a jumper it apparently stopped. Was this a
coincidence?
Graham Baxter
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