Darrel,
I've not used a scope for tuning duplexers, but know it can work if use the
input level settings and sig gen level output adjustment. The scope is a
device that can measure amplitude.
Proper termination using things like dummy loads and other terminator would be
required due to the
bandpass filter -- envelope detector (integrator) -- ADC
The integrator would need to be able to integrate the lowest frequency
allowed by the bandpass. So if I bandpass at 2-3kHz (2nd order) then
I'll probably need to build the integrator to work down to 1kHz. The
integrator also chops
What measurements do you want ? I can send you the spec sheet for the
physical ones of the dpoles butnot the harness. if your interested. Contact me
direct at de_n3dab at tds dot net
--
Doug
N3DAB/WPRX486/WPJL709
Mike Morris WA6ILQ [EMAIL PROTECTED] wrote:
=
A local
The Motorola and think also GE voter look at the peak and valley audio to
determine sig quality. If at the valley there is little audio level then very
quiting signal. If noisey then at the valleys would still be noise and the
peak hi to valley would be less. This is decoded by using some
Cort,
Yes your high to valley low will work as I stated in another reply. Has been
used by Motorola years ago. Also the rec levels from different receivers can
be different since one would be looking at a ratio.
73, ron, n9ee/r
From: Cort Buffington [EMAIL PROTECTED]
Date: 2008/06/20 Fri
-Original Message-
From: Repeater-Builder@yahoogroups.com [mailto:[EMAIL PROTECTED]
On Behalf Of wd8chl
Sent: Friday, June 20, 2008 10:02 AM
To: Repeater-Builder@yahoogroups.com
Subject: Re: [Repeater-Builder] Re: software repeater controller
About the only thing I've seen that was more
Hi Darrell,
I never done it, and will like to try it. Can you send me a sketch of the
setup, with a brief explanation of your procedure for accomplishing this?
Will appreciate it very much Darrell.
v44kai.Joel.
- Original Message -
From: jistabout [EMAIL PROTECTED]
To:
My comment would be that any method that doesn't allow for measuring return
loss at the pass frequency is subject to mistuning. In most duplexers, the
pass is rather wide and if only pass measurements are being made, then the
optimal tuning for input return loss cannot be made accurately.
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