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10 MHZ reference input level for the Anan 7000dle
Posted: Sun Jul 05, 2020 10:43 pm
by KV5J
Looking for the input level for the 10mhz reference input on the Anan 7000dle?
Keith, KV5J
Re: 10 MHZ reference input level for the Anan 7000dle
Posted: Sun Jul 05, 2020 11:28 pm
by W4WMT
Don't know what the design level is, but a TTL square wave works fine here.
73, Bryan W4WMT
Re: 10 MHZ reference input level for the Anan 7000dle
Posted: Mon Jul 06, 2020 12:57 am
by KV5J
What reference level are you using?
Keith,KV5J
Re: 10 MHZ reference input level for the Anan 7000dle
Posted: Mon Jul 06, 2020 1:12 am
by w-u-2-o
Apparently you missed the very first sticky topic in this very sub-forum:
viewtopic.php?f=17&t=2499
Re: 10 MHZ reference input level for the Anan 7000dle
Posted: Thu Jul 09, 2020 9:21 pm
by w-u-2-o
All: I have deleted most of this topic because it has become a non-technically relevant, public slagging match. The answer appears in the topic at the link I provided.
In the interest of keeping the slagging stopped, the specific post in the topic that has the answer is:
https://apache-labs.com/community/viewtopic.php?f=17&t=2499&start=60#p5969And the quote from that post is:
"With respect to appropriate input levels for an external reference, I find that anything between +7 and +13dBm works. Below +7 I've observed inconsistent performance. Levels above +13dBm could put the input differential amplifier circuit at risk for damage."Note that is as measured into a 50 Ohm impedance.
Re: 10 MHZ reference input level for the Anan 7000dle
Posted: Wed Aug 05, 2020 3:52 am
by W9BHI
My Trimble Thunderbolt puts out a +12.3 dbm sine wave into 50 ohms.
It would be obviously much higher if unterminated.
The reference input to the Orion board is unterminated and I installed a jumper strap on JP22, (50 ohm termination) to keep the input level from being too high and possibly causing any damage to the squaring circuit.
Don