Magnus wrote:
"Multipath rejection, antenna selectivity, antenna amplifier gain, antenna
noise factor... all weigh in."
And Your point is?
Their effects would all be included in as much as they effect ADEV Osc noise
and Phase noise.
"Several of us have carrier phase and dual frequency receivers. I lack a
good double-frequency antenna, choke-ring with
sufficient amplifier gain."
You're not the Average Time nut and sounds like you're saying even you
aren't using a choke ring with a carrier phase receiver?
Sounds like to keep it simple, still don't not need to test for that yet.
ws
**************
WarrenS wrote:
Bruce wrote:
"Which antenna performance metric do you have in mind?"
Could do GPSDO hold over performance, but that would not be much of a
test of the antenna.
How about the antenna's effect on the ADEV Osc noise and Phase noise.
What else does the Time Nut care about?
Multipath rejection, antenna selectivity, antenna amplifier gain,
antenna noise factor... all weigh in. Even for a simple Thunderbolt.
Since the better timing receivers use carrier phase ...
I don't remember you ever finding ANY Time Nut that is now using one.
So may be simpler for now to just stick to the more common type of GPSDO
in use.
Several of us have carrier phase and dual frequency receivers. I have
several myself. I lack a good double-frequency antenna, choke-ring with
sufficient amplifier gain.
Cheers,
Magnus
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