Re: [time-nuts] Thinderbolt 10 Mhz output level?

2016-01-20 Thread Hal Murray 

time-nuts@febo.com said:
> Has anyone actually measured the 10 Mhz level on their thunderbolt? More
> than +10 dbm? 

My scope says 5V p-p unterminated.  Half that into a 50 ohm terminator.

[My brain doesn't think in dB.  You will have to do the conversion.]


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Re: [time-nuts] Thinderbolt 10 Mhz output level?

2016-01-20 Thread Orin Eman 
I have now:

+11.7 dBm on the 8568A spectrum analyzer with 2nd & third harmonics at -60
dBc.

So yes, mine is a dB or two above +10dBm.

Orin.

On Tue, Jan 19, 2016 at 6:29 PM, Chris Arnold via time-nuts <
time-nuts@febo.com> wrote:

> Has anyone actually measured the 10 Mhz level on their thunderbolt? More
> than +10 dbm?
>
> Thanks
> Chris
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Re: [time-nuts] Thinderbolt 10 Mhz output level?

2016-01-20 Thread Bob Camp 
Hi

If it’s below 10 dbm, it’s broken in some way. That’s often something simple 
like the output 
coupling components or a solder joint on the coax connector. 

Bob

> On Jan 19, 2016, at 9:29 PM, Chris Arnold via time-nuts  
> wrote:
> 
> Has anyone actually measured the 10 Mhz level on their thunderbolt? More than 
> +10 dbm?
> 
> Thanks
> Chris
> ___
> time-nuts mailing list -- time-nuts@febo.com
> To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
> and follow the instructions there.

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[time-nuts] Thinderbolt 10 Mhz output level?

2016-01-19 Thread Chris Arnold via time-nuts 
Has anyone actually measured the 10 Mhz level on their thunderbolt? More than 
+10 dbm?

Thanks
Chris
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