[App_rpt-users] RTCM [RX Packet Out of Bounds] ***Updated***

[Kevin Babich]

All,

 

I operate  a network of RTCM's and occasionally find on the individual RTCM
console the syntax "RX Packet Out of Bounds by [insert value] ms.  The
network is comprised of proper Aviat Microwave and Cisco switch gear, with
extremely stable latencies, sub microsecond, as reported by Solar Winds.
That said, can someone help to enlighten me where to begin troubleshooting?
This is what is reported by selecting "98 - Status":

 

Current Samples / Sec.: 8000

Current Peak Audio Level: 56056

Squelch Noise Gain Value: 47, Diode Cal. Value: 41, SQL pot 185

Current Time: Sun  May 27, 2018  23:30:42.300

Last Rx Pkt System time: 05/27/2018 23:30:23.020, diff: 19280 msec

Last Rx Pkt Timestamp time: 05/27/2018 23:30:23.020, diff: 0 msec

Last Rx Pkt index: 160, inbounds: 1

 

The "Last Rx Pkt System time" is always off, and I am unsure how to
synchronize it to current time (this doesn't appear to impact performance).
However, "Last Rx Pkt Timestamp time" is always perfectly synchronized.  The
out of bounds message is typically found on the Master Timing Source and at
least one other RTCM.  While reporting out of bounds, simulcast operation is
unacceptable until the RTCM's reporting the same are reset.  I cannot
correlate any network issue to the RTCM messaging.

 

 

Kindest Regards,

 

Kevin Babich | N9IAA

Valparaiso, IN 46383

 

Mobile: 219.406.9707

 

Cessna 421

Cesssna Conquest I/II

Beechcraft King Air 90/200

 

".It is not the critic who counts; not the man who points out how the strong
man stumbles, or where the doer of deeds could have done them better. The
credit belongs to the man who is actually in the arena, whose face is marred
by dust and sweat and blood; who strives valiantly; who errs, who comes
short again and again, because there is no effort without error and
shortcoming; but who does actually strive to do the deeds; who knows great
enthusiasms, the great devotions; who spends himself in a worthy cause; who
at the best knows in the end the triumph of high achievement, and who at the
worst, if he fails, at least fails while daring greatly, so that his place
shall never be with those cold and timid souls who neither know victory nor
defeat..."  -Theodore Roosevelt

 

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