[SBE] Satellite signal loss detection and switching-Edited

[Chuck Bullett]

On Tue, Jun 10, 2008 at 9:16 PM, Chuck Bullett <chuckbullett at gmail.com>
wrote:


> Bill;

>

> A simple comparator circuit that references AGC current, or Eb Voltage

> would work. Simply reference the measured value to a 5V power supply rail,

> for instance, and set up the performance monitoring characteristics you

> desire. Then, the comparator will trip the output register when the AGC or

> Eb drops below your predetermined value, and then you take the provided lo

> or hi, and trip a gate which can  then provide you with another logic value

> to trip an  audio source switch, like a broadcast tools or titus labs box.

>

> 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

> DC Mobile: 240-464-7523

> chuckbullett at gmail.com

> Amateur Call: W1AEK

>

>

> See my profile at LinkedIn:

> http://www.linkedin.com/in/chuckbullett

>




-- 
Charles Bullett; CSRE -
San Francisco, CA 94105
Office Tel: 415-995-7009
SF Mobile: 415-816-7423
DC Mobile: 240-464-7523
chuckbullett at gmail.com
Amateur Call: W1AEK


See my profile at LinkedIn:
http://www.linkedin.com/in/chuckbullett