Meanwhile some progress made
My Trimble GPSDO 10MHz output 30mV tt amplified a filter followed by 3 stage amplifier
then shaped by hex inverting Schmitt trigger 74AC14
a reasonable clean signal at 1296.210
Shielding and grounding and a clean 5V power are important
the AM 350Hz hum side-bands are weaker
-60 dB at 144.550 -40dB 1296.210
The ADF4351 REF in seems to be a straight TTL input without analog interfacing.
It omits a trigger circuit. I had to make that myself.
The specs only give the maximum signal level for this REF nothing about the shape or minimum
usable level.
It does not work with a relative weak or sinus shape 10MHz signal.
Some other types PLL chips seem to have no issue with the reference level.
2V / division .5 uSec /devision 10MHz signal at the ADF REF input
test setup
A short shielded cable to the SMA REF improved the signal a lot
the onboard 10MHz oscillator output is open the jumper is connecting the external REF
The oscillator is not switched off it seems to have influence to the signal quality
When touching the open oscillator out with a very short wire the AM hum increases strong
possible it is better to switch it off have to find out how
on top the GPS rx giving the 1pps to the Progrock that outputs a 10MHz to the REF in of ADF4351a tuned to 1296.200MHz out the 23cm XVTR is next on the desk
the other picture is still crawling over the internet to my mailbox.
Another test with the ADF4351A / Progrock / QLG1 GPS
Using the ADF onboard 10MHz DIL oscillator
I got a clear T9 signal at 1296.185 MHz S9 +60 and more
on the IC706 144.185 as i.f. receiver.
The S reading drops to about S9 10 khz away and no AM sidebands.
With the Attenuation down to 9+40 close to the carrier the S reading drops to zero
that seems very acceptable roughly 60dB down
But the 10MHz from the Progrock clk0 out results huge wide AM hum side-bands
very irritating sound approximate 350Hz
No difference if the 10MHz clock0 out is directly on the REF -IN
or over the 74AC14 Schmitt trigger ports to shape it to TTL level.
The Progrock is connected to the QLG1 GPS receiver 1pps
Sometimes i hear a sudden jump in the output frequency it seems regulated
But it does not sound at all like a stable tone
It is constantly drifting slowly up and down like random
Touching the 27MHz xtal the 1296.185 frequency drifts a lot and
It was not regulated as if there is no lock.
My conclusion:
ADF with a better 10MHz signal can give a clean output
The Progrock clock0 output does not produce a suitable 10MHz signal for the ADF.
Now i will have to try my Trimble GPSDO 10MHz signal
amplify its 30mV 10MHz to a TTL shape level.
I tried an INA10386 folowed with the 74AC14 pulse shaper
no good result the signal was 1-2V sin but changing all the time
Or the frequency seems to be doubled distorted and or the output went to zero
I hope that someone reading my struggle can give a hint!
23cm XVTR DB6NT 1990 design TX over 2W out stable since the MSA0885 is replaced
with the original part INA10386 as driver for the M67715
One Buck converter for 13.5 to 8V for the PA with M67715 the buck converter is switched to 13.5 at TX that can give some delay before full output is reached but i did not notice any drawback yet.
If the buckconverter is having switching mode QRM it will only be there during TX.
But sofar I have not noticed RFI from this type of sm-converters
I amusing it mobile to convert 13.6V to 8V for the 70cm mobile also RFI effects noticed yet.
btw
sharing pictures with HTC phone is annoying slow and difficult
One drive does not work with this blog yet
Dropbox is full , Picasa once worked nice ..
mailing it to myself still seems the only working option
The HTC one camera once was good but now all is turning purple if not in full daylight.
Besides that opening the camera is a very slow process
Once it is active in seconds the HTC goes standby again to save power..
the security patern once it is activated no way to disable it.
it seems that Technic is more and more a struggle the older i get.
I had to reboot my older Laptop Lenove X60 with W10
W10 works nice on this relative slow Laptop.
But what is slow? when it came on the market sure it was called very fast..
W10 is running nice on it besides some blue screens of W10
but now it was going very slow had to reboot
then logged in with finger biometric as normal
sudden there was a Cortana pop up :
Hello! i am Cortana i am going to help you
ask any question!
and a message about the biometric system being beta type??
huh? it worked all the time without problem
Did i catch a bad W10 update crashing my PC?
few reboots with "do not turn off while updating etc.."
the keyboard did not work on its question input field..
the mouse was spinning around
sudden my system was playing crazy
I remember once Word had its assistant.. "helping" blocking your system with stupid useless answers
annoying! never ever heard again of the assistant experiment
but now its back! Cortana will frustrate you hihi
My Trimble GPSDO 10MHz output 30mV tt amplified a filter followed by 3 stage amplifier
then shaped by hex inverting Schmitt trigger 74AC14
a reasonable clean signal at 1296.210
Shielding and grounding and a clean 5V power are important
the AM 350Hz hum side-bands are weaker
-60 dB at 144.550 -40dB 1296.210
The ADF4351 REF in seems to be a straight TTL input without analog interfacing.
It omits a trigger circuit. I had to make that myself.
The specs only give the maximum signal level for this REF nothing about the shape or minimum
usable level.
It does not work with a relative weak or sinus shape 10MHz signal.
Some other types PLL chips seem to have no issue with the reference level.
test setup
10dB / dev.
discrete 10MHz booster 3 stage and a band filter
after a lot of modifications this one can amplify the 30mV 10MHz Trimble out
to 5V tt square wave
derived from a video amplifier
A short shielded cable to the SMA REF improved the signal a lot
the onboard 10MHz oscillator output is open the jumper is connecting the external REF
The oscillator is not switched off it seems to have influence to the signal quality
When touching the open oscillator out with a very short wire the AM hum increases strong
possible it is better to switch it off have to find out how
on top the GPS rx giving the 1pps to the Progrock that outputs a 10MHz to the REF in of ADF4351a tuned to 1296.200MHz out the 23cm XVTR is next on the desk
the other picture is still crawling over the internet to my mailbox.
Another test with the ADF4351A / Progrock / QLG1 GPS
Using the ADF onboard 10MHz DIL oscillator
I got a clear T9 signal at 1296.185 MHz S9 +60 and more
on the IC706 144.185 as i.f. receiver.
The S reading drops to about S9 10 khz away and no AM sidebands.
With the Attenuation down to 9+40 close to the carrier the S reading drops to zero
that seems very acceptable roughly 60dB down
But the 10MHz from the Progrock clk0 out results huge wide AM hum side-bands
very irritating sound approximate 350Hz
No difference if the 10MHz clock0 out is directly on the REF -IN
or over the 74AC14 Schmitt trigger ports to shape it to TTL level.
The Progrock is connected to the QLG1 GPS receiver 1pps
Sometimes i hear a sudden jump in the output frequency it seems regulated
But it does not sound at all like a stable tone
It is constantly drifting slowly up and down like random
Touching the 27MHz xtal the 1296.185 frequency drifts a lot and
It was not regulated as if there is no lock.
My conclusion:
ADF with a better 10MHz signal can give a clean output
The Progrock clock0 output does not produce a suitable 10MHz signal for the ADF.
Now i will have to try my Trimble GPSDO 10MHz signal
amplify its 30mV 10MHz to a TTL shape level.
I tried an INA10386 folowed with the 74AC14 pulse shaper
no good result the signal was 1-2V sin but changing all the time
Or the frequency seems to be doubled distorted and or the output went to zero
I hope that someone reading my struggle can give a hint!
23cm XVTR DB6NT 1990 design TX over 2W out stable since the MSA0885 is replaced
with the original part INA10386 as driver for the M67715
One Buck converter for 13.5 to 8V for the PA with M67715 the buck converter is switched to 13.5 at TX that can give some delay before full output is reached but i did not notice any drawback yet.
If the buckconverter is having switching mode QRM it will only be there during TX.
But sofar I have not noticed RFI from this type of sm-converters
I amusing it mobile to convert 13.6V to 8V for the 70cm mobile also RFI effects noticed yet.
btw
sharing pictures with HTC phone is annoying slow and difficult
One drive does not work with this blog yet
Dropbox is full , Picasa once worked nice ..
mailing it to myself still seems the only working option
The HTC one camera once was good but now all is turning purple if not in full daylight.
Besides that opening the camera is a very slow process
Once it is active in seconds the HTC goes standby again to save power..
the security patern once it is activated no way to disable it.
it seems that Technic is more and more a struggle the older i get.
I had to reboot my older Laptop Lenove X60 with W10
W10 works nice on this relative slow Laptop.
But what is slow? when it came on the market sure it was called very fast..
W10 is running nice on it besides some blue screens of W10
but now it was going very slow had to reboot
then logged in with finger biometric as normal
sudden there was a Cortana pop up :
Hello! i am Cortana i am going to help you
ask any question!
and a message about the biometric system being beta type??
huh? it worked all the time without problem
Did i catch a bad W10 update crashing my PC?
few reboots with "do not turn off while updating etc.."
the keyboard did not work on its question input field..
the mouse was spinning around
sudden my system was playing crazy
I remember once Word had its assistant.. "helping" blocking your system with stupid useless answers
annoying! never ever heard again of the assistant experiment
but now its back! Cortana will frustrate you hihi
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