[time-nuts] RCC 8000

ernieperes at aol.com ernieperes at aol.com
Sun Dec 30 13:58:29 UTC 2007


Hi,


I am looking a description/manual for Radio Clock? type RCC 8000 receiver... assume it is tuned ?60kHz ..... and should like to convert? to DCF 77......every advise is appreciated.

Rgds, Ernie




-----Original Message-----
From: Ulrich Bangert <df6jb at ulrich-bangert.de>
To: 'Discussion of precise time and frequency measurement' <time-nuts at febo.com>
Sent: Sun, 23 Dec 2007 11:33 am
Subject: Re: [time-nuts] HP 5370B question



Bob,

just for fun I run the same test with my SR620 counter with results VERY
similar to your measurements. See the attached distribution.

Best regards
Ulrich Bangert

> -----Ursprungliche Nachricht-----
> Von: time-nuts-bounces at febo.com 
> [mailto:time-nuts-bounces at febo.com] Im Auftrag von Mike Feher
> Gesendet: Samstag, 22. Dezember 2007 12:41
> An: 'Discussion of precise time and frequency measurement'
> Betreff: Re: [time-nuts] HP 5370B question
> 
> 
> Bob -
> 
> With most counters, I have found that running them at 
> slightly less than 10 MHz gives you an extra displayed digit 
> of resolution. If the "1" out of 10 MHz were to be displayed, 
> it would take up one more digit in the MSD position, leaving 
> you one less in the LSD position. Since the numbers are so 
> close anyway, if measuring for stability, I personally would 
> prefer that extra digit in the LSD position. Regards - Mike 
> 
>  
>  
> Mike B. Feher, N4FS
> 89 Arnold Blvd.
> Howell, NJ, 07731
> 732-886-5960
>  
>  
> -----Original Message-----
> From: time-nuts-bounces at febo.com 
> [mailto:time-nuts-bounces at febo.com] On Behalf Of Robert E. Martinson
> Sent: Saturday, December 22, 2007 1:57 AM
> To: 'Discussion of precise time and frequency measurement'
> Subject: Re: [time-nuts] HP 5370B question
> 
> I ran my 5370B for one hour, counting its own reference with 
> a one second gate.  The summary of the results are:
> 
> min   9999999.99650  Hz
> max   9999999.99963  Hz
> avg   9999999.99796  Hz
> median    9999999.99787  Hz
> 
> Per the manual's  Performance Test 5 (page 4-12) the spec is 
> +/- 0.005 Hz. It would be nice if my average was 
> 10,000,000.000 HZ but??  From a Time-nuts thread of several 
> months ago, the adjustment for this result is very touchy and 
> it's likely you will make the result worse rather then 
> better.  Since mine is in spec, I'll leave it alone.
>  
> I have sent the graphical & raw data to Corby, if anybody 
> else is interested please advise me of your email address.
> 
> Regards,
> Bob Martinson, N1VQR
> 
> 
> 
> 
> -----Original Message-----
> From: time-nuts-bounces at febo.com 
> [mailto:time-nuts-bounces at febo.com] On Behalf > Of corby d 
> dawson
> Sent: Wednesday, December 19, 2007 2:15 PM
> To: time-nuts at febo.com
> Subject: [time-nuts] HP 5370B question
> 
> 
> Hi,
> 
> Could a few of the 5370B owners connect the counters 
> reference output to its counting input jack and with a 1 
> second gate let me know what the last 2 digits are doing?
> 
> An earlier post implied that the last couple digits will 
> wander around due to the way its designed.
> 
> I'd like to know what a couple different counters show to see 
> if that is indeed true!
> 
> Thanks,
> 
> Corby Dawson
> 
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