[SBE] Satellite signal loss detection and switching

[Chuck Bullett]

Bill;

A simple comparator circuit the references AGC current, of Eb Voltage would
work. Simple reference the measured value to a 5V power supply, for
instance. Then, when the comparator trips the output register when the AGC
or Eb drops below your predetermined value, take a lo or hi, and trip a gate
which can  then provide you with a logic hi or low to trip a  audio source
switch.

A couple of chips and you should be good--- unless your receiver has an LOS
(loss of signal)  alarm relay contact built-in. That would be handy.

Good Luck

Chuck Bullett; CSRE
San Francisco

On Tue, Jun 10, 2008 at 11:21 AM, Bill Whitt <billw at betterlifetv.tv> wrote:


> Hello all,

>

>            I was wondering if anyone has an awesome way to measure signal

> loss from a satellite receiver that will allow you to switch to another

> device during this loss, and then switch back again when the signal is

> measured stable for a period of time. This switch would have to have some

> kind of hysteresis on it so that it won't switch over when we get little

> satellite bumps. I was curious if anyone has ever had to deal with this

> before.

>

>

>

> Bill Whitt

>

> Bill Whitt

>

>

>

> Better Life Broadcasting Network

>

>   Phone: 541-474-3089

>

>       Fax: 541-474-9409

>

> Website: www.betterlifetv.tv

>

>

>

>

>

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-- 
Charles Bullett; CSRE -
San Francisco, CA 94105
Office Tel: 415-995-7009
SF Mobile: 415-816-7423
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