[BC] Motorola PTP 400 Ethernet 'bridges'

[Dana Puopolo]

I have used a 2.4 gHz ethernet bridge as an STL since last July. It has been
flawless except for one ice storm where the roof of the transmitter
building got covered by two inches of ice. The antenna was located inside and
the f n attenuated the signal to the point where the circuit began burping.
Knocking the ice off the roof restored proper operation. This was a half mile
link using a cheap Q Bridge system (http://www.connexwireless.com/Q-Bridge/).
We also use the bridge for Internet access and VOIP for the Sine remote
control.

-D

------ Original Message ------
Received: Sat, 07 Apr 2007 01:27:06 PM EDT
From: jeff at rfproof.com
To: "Broadcast" <broadcast at radiolists.net>
Subject: [BC] Motorola PTP 400 Ethernet 'bridges'

Greetings,

I am planning a four station urban RF STL system utilizing the Motorola PTP
400 (formerly Orthogon) 5.8GIG Ethernet bridge technology. The codecs will be
APT Worldnet OSLOs. 

Who among us has experience with Ethernet bridge 'radios'? They will be used
for all STL-TSL HD Radio link functions. Gary Liebisch and Tim Anderson
caution 1 in a million packet loss is the the limit for UDP packet exchange
from Exporter to Flexstar. However I understand TCP is coming to the HD Radio
air chain.

In the application being planned, one link will carry all four stations to a
central point about two blocks away from the studios. From there three links
will be to the TX sites. Two sites are less than a mile, and the third (with
two stations) is just shy of six miles. They are all line-of-sight.

The present STL system is T-1/Intraplex backed up by ISDN/Zephyr.

Jeff.Johnson at rfproof.com
RFPROOF.COM

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