Even HP used 5MHz when it counted (no pun intended!) - the 5245L used a 1MHz
timebase while the higher spec timebase in the 5245M used 5MHz.
DaveB, NZ
----- Original Message -----
From: "Bob Camp" <[email protected]>
To: "Discussion of precise time and frequency measurement"
<[email protected]>
Sent: Saturday, August 03, 2013 8:47 AM
Subject: Re: [time-nuts] 5MHz x 10MHz
Hi
Except for HP, everything from the US would have been 5 MHz as well.
Bob
On Aug 2, 2013, at 3:51 PM, Robert Atkinson <[email protected]>
wrote:
Hi
Most of the British Racal standards are 5MHz. It may well have been down
to what was the best performance of the nationally avilable crystals.
Everthing is a compromise.
It is easy to double a 5MHz output to 10MHz. One way is to pass it
through a bridge rectifier (high speed diodes of course) and then filter
it. old 10Mbs "thin" ethernet filters from network cards work well. Check
the archives and do a websearch.
Robert G8RPI.
________________________________
From: Bob Camp <[email protected]>
To: Discussion of precise time and frequency measurement
<[email protected]>
Sent: Friday, 2 August 2013, 20:12
Subject: Re: [time-nuts] 5MHz x 10MHz
Hi
It may well have been teamed up with a piece of Russian designed
equipment.
Bob
On Aug 2, 2013, at 2:40 PM, Euclides Chuma <[email protected]> wrote:
Hi,
I thank all for your responses.
My question arose because I bought a TFL Rubidium Standard and the
signal output is 5 MHz. It is a great rubidium standard so I dont
understand the reason of the 5 MHZ signal output since the 10 MHz is the
common standard.
Best regards
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