Hi
Assuming you know the power level you will be delivering to the sat and the
noise figure of the
receiver on the sat, the calculation is just as presented earlier. If the
antenna on the sat has gain,
that also gets into this and that.
Using some made up numbers, since I do not have the
Hi again Karen,
Have you seen this app designed specifically for the Es'hail QO-100?
https://play.google.com/store/apps/details?id=com.antmodstudios.eshail2linkbudget=nl
Any extra margin on C/N0 can be used to estimate permissible LO phase noise.
Otherwise, you can put together a link budget in
Hello Bill,
Thank you for the clarification. It is especially pleasant that our opinions
are 100% the same.
However, I would like to find some tool for calculating the balance of the
radio link in order to understand exactly the reasonable requirements for
synthesizer's PN.
The issue of
On Fri, Apr 24, 2020 at 8:08 AM jimlux wrote:
> On 4/24/20 5:52 AM, David J Taylor via time-nuts wrote:
> > Hi
> >
> > The “wiggles” he is chasing are about 2-3 Hz (by eyeball on his charts).
> > At 2.4 GHz,
> > that is a fairly convenient ~1 ppb. The Z-3801 (if it was in good
> > health) should
On 4/24/20 5:52 AM, David J Taylor via time-nuts wrote:
Hi
The “wiggles” he is chasing are about 2-3 Hz (by eyeball on his charts).
At 2.4 GHz,
that is a fairly convenient ~1 ppb. The Z-3801 (if it was in good
health) should be easily
able to hold that level of performance. It’s not clear
Hi
The “wiggles” he is chasing are about 2-3 Hz (by eyeball on his charts). At
2.4 GHz,
that is a fairly convenient ~1 ppb. The Z-3801 (if it was in good health)
should be easily
able to hold that level of performance. It’s not clear which MD-011 he is
using, but it is
a pretty good bet it
Hi
The “wiggles” he is chasing are about 2-3 Hz (by eyeball on his charts). At 2.4
GHz,
that is a fairly convenient ~1 ppb. The Z-3801 (if it was in good health)
should be easily
able to hold that level of performance. It’s not clear which MD-011 he is
using, but it is
a pretty good bet it
Hello Karen,
As a general rule of thumb, if uplink LO phase noise power ends up being
at least 15-20dB below the expected kTB noise received at the satellite
transponder, its contribution is not really significant. With -98dBc-Hz,
on Tx, you should be in good shape because, to simplify things
From: Karen Tadevosyan via time-nuts
Hi,
one of the interesting HAM radio topic in Europe now is the use of the new
geostationary satellite Phase-4A (QO-100) for analog and digital modes via a
2.4/10 GHz transponder.
[]
===
... and Time-Nuts may be
Hi,
one of the interesting HAM radio topic in Europe now is the use of the new
geostationary satellite Phase-4A (QO-100) for analog and digital modes via a
2.4/10 GHz transponder.
For my transverter (input from a UHF transceiver) in TX mode I use a 1968
MHz LO with a phase noise level -98
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