That's a 0.37 Hz bin width.
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LEO BODNAR LBE-1421 Review (Clock Generator)
- Thread starter NTTY
- Start date
=> Although I had not imagined the clever method to measure it directly, that result was already obvious since your original post.
DonDish
Senior Member
Probably Switzerland or Norway BIGMAC Index
Nice analysis, Amir!
The avionics biz I worked for used the GPSDO 10MHz ref. The system we used originally had an HP GPS rcvr that fed the signal to a mass of daisy-chained Symmetricom distributors. An embedded 12Vdc over 0dBm coax type of system. Since the traceability of the 10MHz reference is sourced by a global network of accredited labs, maintaining proof of certification was as simple as filing a printed copy of the Naval Observatory's (USNO) certification report.
The system was ancient age and suffered numerous spot failures, mostly the drop boxes, but one day the main receiver and its rooftop antenna pooped after a lightning storm, so I had to scramble for a new system. There was no backup except for an old 'Ball' Rubidium oscillator source I had. Fortunately the powered distribution net survived -sort of. Each drop box could only source 2 or 3 TTL equivalent loads but that was iffy as I preferred single loadings per box. I needed at least six drop boxes.
Which turned out to be NLA obsolete, but I was able to find an inexpensive equivalent. I don't now recall the brand/model with ^-12 stability and -140dBc 1Hz noise, but it was <$100 and an overnight ship.
Then the hitch was to find distribution boxes of equivalent performance. The factory/engineering and calibration labs all depended on this system and used dozens of the distribution drop boxes and I had NO spares.
Being a ham, I knew of the Tucson Amateur Packet Radio (TAPR) folks, so I obtained a handful of their TADD-1 6 port distribution pcb's with steel case. I was under the gun to keep below budget so I got these as kits and assembled/characterized them in the lab before deployment. Instant success.
These are phase-matched outputs with specs similar to the LBW-1421 output reviewed here, and at a price of <$100 USD and can be powered by a wall wart or over the coax.
If you're a ham, TAPR has got some cool stuff. I am not associated with them in any way. Just saying as a happy customer.
k
The avionics biz I worked for used the GPSDO 10MHz ref. The system we used originally had an HP GPS rcvr that fed the signal to a mass of daisy-chained Symmetricom distributors. An embedded 12Vdc over 0dBm coax type of system. Since the traceability of the 10MHz reference is sourced by a global network of accredited labs, maintaining proof of certification was as simple as filing a printed copy of the Naval Observatory's (USNO) certification report.
The system was ancient age and suffered numerous spot failures, mostly the drop boxes, but one day the main receiver and its rooftop antenna pooped after a lightning storm, so I had to scramble for a new system. There was no backup except for an old 'Ball' Rubidium oscillator source I had. Fortunately the powered distribution net survived -sort of. Each drop box could only source 2 or 3 TTL equivalent loads but that was iffy as I preferred single loadings per box. I needed at least six drop boxes.
Which turned out to be NLA obsolete, but I was able to find an inexpensive equivalent. I don't now recall the brand/model with ^-12 stability and -140dBc 1Hz noise, but it was <$100 and an overnight ship.
Then the hitch was to find distribution boxes of equivalent performance. The factory/engineering and calibration labs all depended on this system and used dozens of the distribution drop boxes and I had NO spares.
Being a ham, I knew of the Tucson Amateur Packet Radio (TAPR) folks, so I obtained a handful of their TADD-1 6 port distribution pcb's with steel case. I was under the gun to keep below budget so I got these as kits and assembled/characterized them in the lab before deployment. Instant success.
These are phase-matched outputs with specs similar to the LBW-1421 output reviewed here, and at a price of <$100 USD and can be powered by a wall wart or over the coax.
If you're a ham, TAPR has got some cool stuff. I am not associated with them in any way. Just saying as a happy customer.
k
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