10MHz locked?

W9IP
Posts: 43
Joined: Mon Apr 10, 2017 11:57 am

10MHz locked?

Postby W9IP » Sat Sep 30, 2017 7:57 pm

Dear friends,
I have installed the 10MHz daughter card in my Angelia. How can I tell whether it is locked to the 10MHz that I am supplying from a GPSDO?
Thanks,
W9IP
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w-u-2-o
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Joined: Fri Mar 10, 2017 1:47 pm

Re: 10MHz locked?

Postby w-u-2-o » Sat Sep 30, 2017 9:11 pm

See page 2 of this thread.

73,

Scott
W9IP
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Joined: Mon Apr 10, 2017 11:57 am

Re: 10MHz locked?

Postby W9IP » Sat Sep 30, 2017 10:07 pm

Thanks, Scott.
Follow-on question... what level (dBm) does Angelia's 10MHz input expect?
Thanks-
MRO
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w-u-2-o
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Re: 10MHz locked?

Postby w-u-2-o » Sun Oct 01, 2017 12:55 am

I don't actually know. However, empirical evidence shows that it can be sine or square, single ended or differential, and pretty much any peak to peak voltage from 1 to 5 volts.

The schematic of the daughtercard is here. I've never bothered to analyze it, myself.

BG7TBL and Bodnar GPSDOs are both proven to work. Anything with a 0 to 10dBm sine output into 50 Ohms, or a 3.3 or 5.5VDC single ended CMOS output, should work fine.

In other words, the input is robust and optimization of the signal type and level is not required for good performance.

73,

Scott
W9IP
Posts: 43
Joined: Mon Apr 10, 2017 11:57 am

Re: 10MHz locked?

Postby W9IP » Sun Oct 01, 2017 11:29 am

Fantastic, thanks again Scott.
73,
W9IP

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