[NHRC-user] NHRC-4/M2 Question

[Jeff Otterson]

What is confusing to me is that both the CAS and PTT lights flicker.

This is why I thought it could be static discharge.

Do the DTMF tones reliably decode?

Jeff...



At 07:01 AM 3/1/2002, you wrote:
>I will try a couple of other experiments to narrow this down. The problem
>had been ongoing at the repeater site but was written off as intermod or
>some other cause from around the repeater site.
>
>The signal source is a CT-3000B and it may be some noise from it. But that
>won't explain it happening at the repeater site. I could see a receiver
>problem but not at exact intervals.
>
>I did monitor the TS-32 and cannot see any logic pulse on it each time
>happens.
>
>What is way too confusing is the repeatablility of the problem at exactly 4
>minute intervals. It is like a timer is doing this.
>
>Will keep looking.
>
>Dave
>
>-----Original Message-----
>From: nhrc-user-admin at nhrc.net [mailto:nhrc-user-admin at nhrc.net]On Behalf Of
>PETER GAILUNAS
>Sent: Thursday, February 28, 2002 10:31 PM
>To: nhrc-user at nhrc.net
>Subject: RE: [NHRC-user] NHRC-4/M2 Question
>
>Hi,
>Pete here from NHRC.
>
>If the Green CAS led will only illuminate if both CAS and PL are
>satisfied.  The controller handles this function with simple transistor
>logic.
>If the green led flickers it is because it is getting a valid signal from
>the MASTR-II and the pl decoder.  If the green LED flickers the controller
>thinks a signal is present and starts doing it job.
>The ID cycle starts and will continue indefinitely if the CAS led keeps
>flickering.
>
>
>It could be a tone decoder problem,  It could be intermod.  It may be
>possible that the tone decoder is responding intermittently to some
>distortion component of the 1KHZ signal.  It only needs to be for a
>fraction of a sec to create a valid CAS and start the cycle.    The
>distortion may be due to IF issues.
>
>I don't think it is a controller related problem.
>
>let me know if this helps.
>
>
>Peter
>
>
>
>
>
>
>At 08:16 PM 2/28/2002 -0500, you wrote:
> >This sounds like a hardware problem.  Let's see what Pete has to say about
>it.
> >
> >My guess is static discharge.  I could be way off base, but that's my
> >first guess.
> >
> >Regards,
> >
> >Jeff
> >
> >At 08:03 PM 2/28/2002, you wrote:
> >>NHRC-4/M2...
> >>
> >>Jeff,
> >>
> >>I was also wrong about the led that I thought was the RB is actually the
> >>main receiver green LED. A couple of other pieces of information. I am
> >>applying a continuous signal on the receiver with a 1khz tone. I am using
>PL
> >>decode only to access the repeater. I have checked the 10 regulator in it
> >>appears clean. What has me perplexed is the every 4 minute hit on the main
> >>COS and PTT line. Without any corresponding change in the receiver. After
> >>the second hit in a couple of minutes the unit ID's and the cycle starts
> >>over.
> >>
> >>Dave
> >>
> >>Dave
> >>
> >>-----Original Message-----
> >>From: nhrc-user-admin at nhrc.net [mailto:nhrc-user-admin at nhrc.net]On Behalf
>Of
> >>Jeff Otterson
> >>Sent: Thursday, February 28, 2002 5:58 PM
> >>To: nhrc-user at nhrc.net
> >>Subject: Re: [NHRC-user] NHRC-4/M2 Question
> >>
> >>Hi David,
> >>    Which controller are you referring to?
> >>
> >>    Jeff Otterson
> >>    NHRC LLC
> >>
> >>At 02:15 PM 2/28/2002, you wrote:
> >> >Has anyone had a situation where the NHRC appears to get a reset signal
>on
> >>a
> >> >periodic reoccurring basis. I am experiencing a problem where we seem to
>be
> >> >getting an ID every 11  12 minutes. Upon watching the unit I see a false
> >> >signal setting off the RB PTT and the Main PTT every 3 minutes 55
>seconds
> >> >give or take a few.
> >> >
> >> >The unit is being operated in PL mode only using a TS-32 so you would
>thing
> >> >nothing should false the line to reset the timer for CW ID. You may even
> >>get
> >> >a courtesy tone at the PTT event but not always.
> >> >
> >> >Also, what is the difference between rev a and rev b units?
> >> >
> >> >David L. Shiplett
> >> >Warner Robins Operations Manager
> >> >LH Network, Inc.
> >> >211 Independence Drive
> >> >Warner Robins, GA 31088
> >> >email: Daves at lhnetwork.com
> >> >(478) 971-3281 (V)
> >> >(478) 971-3481 (F)
> >> >
> >>
> >>_______________________________________________
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> >>NHRC-user at nhrc.net
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> >>
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>
>Peter J Gailunas
>NHRC Repeater Controllers
>WWW.NHRC.NET
>
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