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Backup STL link

Posted: Thu Aug 03, 2017 8:07 am
by mbrockm
Looking for idea on a "cheap" backup link between our Studios and AM site for site control. Using Burk Arc SL plus. I am using a pair of 950 Marti STL 10 for audio. Transmitter control is thru DSL. We have had several DSL outages in recent months. The distance is about a mile and a half. Line of site would have a few trees if I avoid putting anything on our towers. Do have an Leased line OPX phone link still in place. No idea the length of the copper in this link. It has been in place for decades and no one has any records of the path. But it still works. Looking for suggestions on equipment for either a wireless link or a serial link using my OPX line.

Re: Backup STL link

Posted: Thu Aug 03, 2017 8:44 am
by jammerdave
For that distance, I would think a 900 mhz data link on a couple of yagis would do the trick, even through some trees. Ubiquiti, or Mikrotik, and the like. I'm using Mikrotik radios diplexed into one of my STL paths, and it works great across the Sacramento metro out to south of rancho cordova.

dave

Re: Backup STL link

Posted: Thu Aug 03, 2017 9:40 am
by Kelly
If you're just looking for a backup positive way to shut off the transmitter, why not use the squelch contacts on the STL receiver and connect it to one of the transmitter external interlock connections? Shut down the STL transmitter and off goes your broadcast transmitter.

Re: Backup STL link

Posted: Fri Aug 04, 2017 8:30 am
by mbrockm
jammerdave wrote:
Thu Aug 03, 2017 8:44 am
I'm using Mikrotik radios diplexed into one of my STL paths, and it works great across the Sacramento metro out to south of rancho cordova.
What model of MIkrotik are using? What did they cost?

Re: Backup STL link

Posted: Fri Aug 04, 2017 8:33 am
by mbrockm
Kelly wrote:
Thu Aug 03, 2017 9:40 am
If you're just looking for a backup positive way to shut off the transmitter, why not use the squelch contacts on the STL receiver and connect it to one of the transmitter external interlock connections? Shut down the STL transmitter and off goes your broadcast transmitter.
A good idea for a failsafe. Looking more to monitor site when my DSL fails. Or maybe a better link than my DSL. It is pretty slow better than dialup but still slow.

Re: Backup STL link

Posted: Wed Aug 16, 2017 3:17 pm
by jammerdave
Mikrotik Metal9HPn
$108 each from streakwave.
https://www.streakwave.com/itemdesc.asp?ic=RBMetal9HPn

df
mbrockm wrote:
Fri Aug 04, 2017 8:30 am
jammerdave wrote:
Thu Aug 03, 2017 8:44 am
I'm using Mikrotik radios diplexed into one of my STL paths, and it works great across the Sacramento metro out to south of rancho cordova.
What model of MIkrotik are using? What did they cost?

Re: Backup STL link

Posted: Sat Aug 26, 2017 4:17 pm
by W2XJ
I would go Ubiquity at 2.4 or 5.8 GHz.

Re: Backup STL link

Posted: Thu Sep 21, 2017 8:48 am
by mbrockm
jammerdave wrote:
Thu Aug 03, 2017 8:44 am
For that distance, I would think a 900 mhz data link on a couple of yagis would do the trick, even through some trees. Ubiquiti, or Mikrotik, and the like. I'm using Mikrotik radios diplexed into one of my STL paths, and it works great across the Sacramento metro out to south of rancho cordova.

dave
For my FM STL (24 mile) I am using Lanlink boxes with duplexor. RSSI reports as -65. Works okay but wonder if the Mikrotik 900 mhz would give me better throughput.

Re: Backup STL link

Posted: Fri Sep 22, 2017 9:55 am
by jammerdave
mbrockm wrote:
Thu Sep 21, 2017 8:48 am
jammerdave wrote:
Thu Aug 03, 2017 8:44 am
For that distance, I would think a 900 mhz data link on a couple of yagis would do the trick, even through some trees. Ubiquiti, or Mikrotik, and the like. I'm using Mikrotik radios diplexed into one of my STL paths, and it works great across the Sacramento metro out to south of rancho cordova.

dave
For my FM STL (24 mile) I am using Lanlink boxes with duplexor. RSSI reports as -65. Works okay but wonder if the Mikrotik 900 mhz would give me better throughput.
IT guru reports a 3mb throughput using the Mikrotik bullet units. Considering they go through lot's of 7/8 hardline, diplexers at both ends, and an isocoupler at the AM site, we are doing well with them.

df