Transcript Repeater - Welcome - Sierra Blanca Amateur Radio Club

• Club Program for October 2006
• By Rick Sohl – K5RIC
- Repeater
Buck Mountain Repeater
System / Design Plans
By
Rick Sohl – K5RIC
Repeater Access
• Getting this Repeater site requires a 4wheel drive vehicle.
Repeater Basics
• First some Repeater Basics.
• What is a Repeater and how is it Used.
Repeater Basics
Repeater Basics
Repeater Basics
Basic Repeater
Ant
Duplexer
Receiver
Transmitter
Controller
Repeater Input Processing
• The input signal reaches the Antenna,
goes to the Duplexer, is filtered and then
goes onto the RX port and to the Receiver
input.
• The Receiver processes the signal into
audio or data and sends this to the
Controller.
Controller Processing
• The receiver also sends Noise and Tone
Squelch data to the controller.
• The Squelch data turns on the Transmitter
and starts two timers.
• The first timer is a maximum Transmitter
Keyed timer, the second timer,
• Adds any Repeater tail used on the
Repeater.
More Controller Processing
• The Controller also processes the Audio or
Data from the Receiver and matches it to
the Transmitter input.
• The Controller may also add Identification,
other tones and may also,
• provide remote control and telemetry data.
Transmitter Processing
• The Transmitter processes the Voice and
or data onto an RF Signal.
• This signal is then passed to the Duplexer
and filtered to the Transmitter Input port.
Duplexer Processing
• The Duplexer provides isolation and
filtering between the Transmitter
Frequency Port and the Receiver
Frequency Port and
• Combines the two ports to one antenna
port.
KISS - Repeater
Ant
Duplexer
Receiver
Transmitter
Controller
K5RIC Buck Rpt
• Normal Repeater Use:
• VHF – 146.980 MHz with 100.0 Tone
• UHF – 443.925 MHz with 162.2 Tone
K5RIC Buck Rpt
• Emergency Operations:
• VHF – 146.980 MHz with 107.3 and 100.0
Tone for Emergency Operation
Announcements ONLY
• Emergency Repeater operations 100.0
• Echo Link – Use normal tone, but no
Encode Tone will be sent out.
• AT this time the UHF only has 162.2 tone
K5RIC Buck Rpt
• The Buck Mountain. Repeater System is
built with a much expanded System, but
uses the above system as its foundation.
• The Buck System will be built in a number
of Phases.
– Phase 1 is now completed and provides two
Repeaters on Buck Mountain.
– VHF 146.980 MHz / 100.0 tone / 107.3 tone
– UHF 443.925 MHz / 162.2 tone
K5RIC Buck Rpt
• These two repeaters are built so that they
can be operated as two separate systems
or:
• They can be cross-linked between each
other.
• They share a common power supply with
an emergency battery back up and also
• They share a controller
K5RIC Buck Rpt
• They share a common 100 foot radio
tower, but the two antenna systems are
separate. Buck is at 10,750 Feet MSL.
• The control operators may operate the two
as separate systems or they may crosslink the two.
• In the cross-link mode only one side may
operate in the full repeat mode. The other
must only link to other sites
K5RIC Buck Rpt
• This Cross-Link feature allows a partial
control / link feature to be utilized at my
home station.
• This allows, at this time:
– Echo Link
– Manually configured Remote base use
– Back up Transmit or Receiver use
– KISS Voter Operation
K5RIC Buck Rpt
• This completes the Phase 1 Project for
this system.
K5RIC Buck Rpt
• This completes the Phase 1 Project for
this system.
• I still have a few items to work or improve
on, but the basic Phase 1 Project is now
complete.
K5RIC Buck Rpt
• Phase 2
• This phase will build the “Master”
Repeater control system to be located at
my home station.
• This system will provide the following
features to the repeaters on Buck
Mountain.
K5RIC Buck Rpt
• Remote Base Operation
– Full Frequency / Tone Controllable Bases on:
– 10, 6, 2 Meters and also 440-450 MHz
– Fixed Remote Base on 146.610, 146.920,
147.220 or 147.340 MHz Frequencies
• Phone Patch
• Echo Link
K5RIC Buck Rpt
• All of the above features will be fully
controllable and useable by all members
of the Sierra Blanca ARC and Lincoln
County ARES/RACES team.
• A full list of all USER codes will be
provided to all SBARC members who have
a Technician or Higher Class of License.
K5RIC Buck Rpt
• These features will be set up on Phase 2
by using the existing UHF system as our
control / link,
• An added control system consisting of a
full duplex 420 – 430 MHz link radio
channel will be added soon, this is part of
Phase 3, but will / may be integrated
during Phase 2 construction.
K5RIC Buck Rpt
• Phase 3
• This project as noted above, may be
started during some of the Phase 2
project.
• This will add a separate full duplex (one
for VHF and one for UHF) control link /
system between Buck and the Master
controller.
Buck / Master Site Map
Rpt. 1 146.980 TX
Master Site
Remote Bases
Remote Base
Rpt. 2 443.925 TX
Master Site
Phone Patch
NOAA WX RX
Echo Link
K5RIC Buck Rpt
• Phase 4, in this phase the Automatic Voter
System will be installed, this will add
Satellite Voters for both VHF and UHF
repeaters at Ruidoso, Roswell and other
areas that will be determined by this time
• This will include a separate UHF link
system for each Voter Receiver
Voter System
RF Link
Receiver A
IP
Voter
Transmitter
Receiver B
IP
IP
LAN /
WAN
IP
Ethernet
Receiver C
IP
K5RIC Buck Rpt
• The Voter controllers will be located on
Buck Mountain and will send the Voted
Receiver data / voice to the Master Site or
in case of a failure on that system, the
Voter can be voted directly to its
associated Transmitter.
Voter Process
• When we add Voting, we can then use the
Receiver coverage from more than one
geographic location to the Repeater.
• The Voter will measure the Signal and
Noise on each Receiver and Vote the one
with the best signal to be Repeated.
Voter Repeater Diagram
• The next slide will show a diagram of a
Voter Repeater with three Receivers.
• One Receiver will be at the Repeater site
and the two others will be at remote sites
from the Repeater.
• A voter System can have as many as 32
Voted Receivers.
Buck Repeater w/3RX
Voter
Ant
Ant
Duplexer
Receiver
146.380
Transmitter
146.980
Link RX 1
420.???
Controller
Voter
Link RX 2
420.???
Voter Site
Ant
Ant
Cavity Filter*
Link
Transmitter
420.???
Pre-Amp*
Receiver
146.380
Controller
* Optional
Voter Uses
• Radio Repeater Voting can be used to fill
in coverage or dead spots for a single
repeater or a group of repeaters in a large
system.
• It can extend range of a Repeater System
using Hand Held Radios.
• Voting may also be used to resolve
Interference issues for a Repeater
System.
Repeater Voting
• In most cases different radio bands will be
used for RF Voting links.
• The same band may be used but
expensive and large filters may be
required as well as careful planning.
Voting Set Up Buck Mtn.
Rpt. 2 UHF
Rpt. 1 VHF
Voter 1 VHF
Voter 2 VHF
Voter 1 UHF
Voter 2 UHF
Voting Map
Rpt. 3
Voter 4
Voter 3
Rpt. 1
Rpt. 2
Voter 1
Voter 2
K5RIC Buck Rpt
• Phase 5
• This last phase will add a fully controllable
High Frequency Remote Base radio to the
Master site. This will allow voice operation
on all allocated SSB voice bands with 100
watts output.
• This Remote base can only by controlled
by a General Class or higher Licensee.
K5RIC Buck Rpt
• Part of the design of this system was
started on the Bullfrog Mountain Site /
WB5MPX, 146.840 / 444.000 Repeaters in
Brewster County Texas.
• That system had all the above features
except for the Voter and Echo Link
systems, that Buck System will have.
K5RIC Buck Rpt
• The Buck System is planned to allow for a
Lincoln County mountain top system that
has capability to provide:
– Phone Patch
– Multiple Remote Bases / Bands / Linking
– Echo Link and
– other features as may develop in the future
– Battery back up power
K5RIC Buck Rpt
• But the system design also required, that
in the event of a failure the Mountain top
Repeater(s) may be Un-linked from the
Master site and operated as KISS
standalone repeaters.
• This allows redundant back up in case of a
failure when Buck has snow and is
inaccessible during the winter.
K5RIC Buck Rpt
• Current Status:
• Both UHF and VHF are linked and Echo
Link is operational.
• The battery back up system is on line and
will keep the system up for about 48
hours.
K5RIC Buck Rpt
• Current Status, Cont.:
• The Antenna System on VHF was
damaged by the high winds, but it is
operational, but under high winds it may
lose RX and TX range.
• This system will be completely replaced in
2007.
K5RIC Buck Rpt
• Current Status, Cont.:
• The UHF system is operational, but is
cross linked so it is primarily used for the
link not as a repeater.
• The UHF Antenna system has better
coverage in Roswell, Dexter, Hagerman
than Ruidoso, this antenna will be moved
in 2007.
K5RIC - Repeater Systems
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This Presentation prepared by:
J. Rick Sohl –
FCC Licensed Radio Engineer
[email protected]
© 2006, 2007 J. Rick Sohl
The End
• 73
• Rick Sohl
Coffee Break !!!!!!