Lincoln County Tennessee Emergency
Communications District
Simulcast two-way radio system for Law
Enforcement use
System Bid Specifications.
May 12, 2010
Fayetteville, Tennessee
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Lincoln County ECD
Simulcast Radio System
I. General: A. Lincoln County Tennessee Law Enforcement Agencies have been using a voted multi-repeater conventional two-way radio system for several years operating on the frequency of 460.025 Megahertz (Mhz). Due to the nature of the terrain in Lincoln County it is not possible to achieve seamless, county wide radio coverage from the current radio system in its present form. Therefore the Lincoln County Emergency Communications District is seeking proposals for a four tower site, simulcast two-way radio system to operate on 460.025 MHz. A land-mobile simulcast radio communication system is to be defined as a grouping of radio repeater stations that transmit simultaneously with no degradation in signal or audio quality. The repeater receiver audio is to be linked to an existing Raytheon JPS voting comparator system at the Lincoln County 911 Center where all received signals will be “voted” upon, the best being selected for retransmission purposes based on signal strength and audio quality. B. In order for a simulcast type of dispatch radio system to work properly all transmitters must transmit on the same frequency to within one cycle per second (1 Hz). All broadcast audio whether it be from the dispatch center, a portable or a mobile radio must be timed so that it leaves all of the transmitters in the systems transmitter at exactly the same time with a delay of no greater than 70 microseconds (us). Simulcast is considered controlled interference since multiple transmitters, if not coordinated very carefully, will interfere with each other. In a simulcast radio system all transmitted information must be heard at all receiving stations at exactly the same time. The modulated information is broadcast from all sites so it arrives in overlapping, or non-capture, zones in-phase and on-frequency in order to create near-seamless coverage. C. In order to implement a simulcast system and maximize intelligible communications in non-capture (overlap) areas:
1. Audio shall be delayed so that all receiving stations (portable, mobile or fixed) receive the transmitted information with a delay of no greater than 70 microseconds.
2. The carrier frequency of each of the transmitters in the system shall be within 1 Hz at the transmit center frequency.
3. Outgoing CTCSS (Continuous Tone Coded Squelch Signaling) shall be launched from each site within the same microsecond, so it arrives in over lapping areas, in phase and on frequency.
4. Transmitter deviation (modulation) shall be precisely measured and adjusted so that recovered audio from every transmitter is within 0.2dB of one another.
The successful bidder will be permitted to use two transmitting sites that are already in use and designate two new locations within Lincoln County Tennessee where simulcast capable repeater stations can be placed to provide complete radio coverage of the entire
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Lincoln County ECD
Simulcast Radio System Continued county, without sending the signal unnecessarily into adjacent counties. In the creation of the desired radio system the successful bidder will be allowed to make use of county owned structures for antenna and equipment support. The successful bidder will be allowed to make use of any county owned equipment presently in-place that is deemed compatible with the new equipment being installed and/or otherwise useful in creating the new simulcast radio system, such as but not limited to wire or radio links, towers, voting equipment and equipment enclosures.
II. Bidder Qualification: A. In order to qualified to answer this RFQ bidders must submit:
1. A certificate of insurance to Lincoln County ECD showing blanket coverage for liability, worker’s compensation and vehicle coverage for $2,000,000 with Umbrella coverage to $5,000,000. COI must come from be signed by a representative of the insurance companies in question.
2. The bidder must show proof that his company is a properly established business in good standing, is licensed for his primary business location and that he has expertise in the field of two-way radio emergency communications.
3. Bidder must show proof that he is licensed in the state of Tennessee as a general contractor if the bid price exceeds established values under State of Tennessee rules.
4. If tower and antenna work is to be done “in-house” by the company submitting the accepted proposal those doing the work must be statutory employees of the bidder or be employees of a sub-contractor. (See Below)
5. If the qualified bidder is successful and must use sub-contractors for any part of the equipment sale and installation he must:
a. Provide the same qualifying documents for the sub-contractor including a certificate of insurance for the same amounts listed above.
b. Show that the subcontractors meet the IRS’ standard for being considered subcontractors.
c. Show that tower and antenna work is done by those qualified by their training, experience and available equipment. Training must be quantified. Showing safety training cards by nationally recognized companies, or company proof of training is sufficient.
d. Be responsible for adherence to all state, federal and local regulations by his subcontractors.
6. The successful bidder responsible for adherence to all state, federal and local regulations by his employees.
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Lincoln County ECD
Simulcast Radio System Continued
III System Specifics The Lincoln County ECD 911 two-way radio simulcast system shall consist of the following:
1. Four (4) each identical new UHF-FM two-way radio repeater stations capable of operating on the frequency of 460.025 Megahertz (127.3 CTCSS) and maintaining that frequency to a tolerance of plus or minus one Hertz (1Hz).
a. Each station will be capable of a minimum of 25 watts output power b. Each station will be equipped with a new band-pass-band/reject
duplexer, 7/8 inch LDF5-50 (or equivalent) coaxial cable, connectors, lightning protection modules (Polyphaser or equivalent), three (3) coaxial cable grounding kits and new DB408 antennas. (See spec sheet 7 for a list of appropriate radio repeater manufacturers)
2. Each station shall be configured to retransmit audio and/or data information simultaneously whenever a mobile, portable or dispatch radio transmits that data.
3. Transmit audio shall be timed so as to arrive at all listening receivers with a delay no greater than seventy microseconds (70us).
4. All simulcast repeaters shall be independently linked by wireless medium to a voting panel at the Lincoln County ECD. The voting panel controls transmit and audio functions of the simulcast system and selects the best receiver of the four for any given exchange of information.
5. Critical timing functions shall be controlled by signals from the Global Positioning System (GPS). The following shall be required.
a. 1 each Primary audio delay module (Voter Panel) (see spec sheet 1) b. 4 each Transmitter delay module (Repeater Sites) (see spec sheet 2) c. 1 Each Audio and Push to Talk Controller (Voter Panel) (see spec
sheet 3) d. 5 Each Spectracom 8185B or equivalent (GPS Master Oscillator) with
appropriate fixed location GPS antennas (see spec sheet 4) 6. Appropriate radio linking for two repeater sites both less than eighteen miles
from the Reservoir Hill tower site. Assumes clear line of sight. Wireless line eliminator system should be as free from delays as is possible. The wire line eliminator system should be digital in nature and capable of multiple IP addresses. Internet connection for the purposes of linking the transmitter sites to the central site is not acceptable due to inherent network delays.
a. Shall operate in the 4.8Ggz (licensed public safety) band. b. Appropriate antenna systems shall be used to give a line of site signal
capability of a minimum of eighteen miles. Acceptable signal level shall be no less than -70 dBm.
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Lincoln County ECD
Simulcast Radio System Continued
7. Radio equipment for two of the remotes sites shall be housed in a weatherproof cabinet installed on a concrete pad. The cabinet shall include a self contained air conditioner (air cooler) capable of maintaining a summer time temperature of eighty (80) degrees Fahrenheit. The cabinet shall measure 62”H x 25” W x 34”D (19”or 23” Racking) (see spec sheet)
8. Emergency battery power for each equipment location shall be provided. (Specification Sheet 6)
9. Items now in use that may remain in use are: a. JPS-Raytheon voting panel located at the Lincoln County Emergency
Communications dispatch center. The successful bidder may, at his discretion, replace the voting system with another of his choice.
b. Tower sites at Icy Bank (Howell, TN) and Reservoir Hill (Fayetteville, TN). It would be impractical for the successful bidder to choose not to use these two sites but it remains at his discretion.
c. Pilot Tone Generators and connectivity equipment at those sites may be replaced with items at the successful bidders discretion.
d. Transmitter shelters. These may be used at the successful bidder’s discretion.
e. Any of the above items not used must be noted in the bidder’s proposal along with all costs associated with the decision not to use.
10. Successful bidder shall be responsible for: a. All permits associated with electrical service at repeaters sites that do
not presently have said service. b. Licensing assistance to for sites which are not presently licensed for
stations transmitting on 460.025 Mhz. Licensing fees shall be paid by Lincoln County ECD.
c. Ensuring proper operation of the finished system including on site adjustments as needed for a minimum of one month after the system is put into full service. These services will be at no additional charge for labor or travel. Repair parts not in warranty will be considered billable to the Lincoln County ECD 911 Board.
d. All warrantees associated with new equipment shall be handled by the successful bidder at no additional cost to Lincoln County ECD.
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Lincoln County Tennessee
Emergency Communications District
Specification Sheet 1
Channel Timing Unit (CTU) One Channel Timing Unit shall be used at the origination site (Lincoln County ECD
Dispatch Center) in order to provide test and timing signals to the Automatic Timing
Units which have been placed at each transmitter site.
The Channel Timing Unit (CTU) used to time outgoing signals from the voter panel
shall be that manufactured by Convex Corp. of Sterling, VA or approved equivalent
To be approved any CTU other than that specified above must meet the following
specifications:
Fixed Gain: The CTU provides unity gain (0 dB) amplification of all frequencies.
Deviation of individual transmitters can be adjusted using the FLAT
GAIN amplifier in the Automatic Delay Line units (ADL) at each
transmitter site. ADL Flat Gain is adjustable from 6 dB loss to 6 dB gain
in 0.1 dB steps and it can be remotely controlled by the LAN port or touch
tones from the central control unit. (Voter panel).
Mounting: Wall or rack mounted
Connections: A two-piece connector with screw locks for audio and power wires.
.
LAN Port: Ethernet 10 Base-T compatible with 100/1000 base-T Networks Control
via Telnet Session with link activity indicators.
1 PPS Input: UTC (Coordinated Universal Time),
One Pulse Per Second input.
Input Z:> 1.5K Ohm/TTL Logic
Time Mark: Low to Hi transition
Minimum pulse width: 1 uSec.
PTT Input High Impedance / Bridging input Input Z: 100K Ohm / TTL or E / M
M Type I, II, III: Key < -20v / Idle > -20v
M Type IV, V; E: Key >-20v / Idle <-20v
TTL: Key <+2.5V / Idle > + 2.5V
TTL Inv: Key >+2.5V / Idle <+2.5V
PTT Switch: Normal: PTT asserted – passes voice, Idle: PTT not active – applies Test
signal.
Tone Keying: Detected for Test Unit control passed through for far end PTT control
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Specification Sheet 1
Channel Timing Unit (CTU) Continued
Frequency Range: 4Hz to 3400Hz
Gain: Unity / 0.0dB
I/O Impedance: 600 ohm – balanced, floating
I/O Return Loss: Greater than 26dB
Input/Output Level: +10dBm max
Nonlinear Dist: Less than 1%
Noise: -60dBmC typical
Environmental: -30 degrees to +60 degrees C, 0 – 95% R.H.
Power: 10 VDC to 18 VDC / 250 mA max
Dimensions: 1.7” H x 4.25” W x 9.4” D
Weight: 1.3 Lb, 0.6 KG
WARRANTY
Unit shall be warranted to be free of manufacturing defects for a period of one year from the date of shipment.
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Lincoln County Tennessee
Emergency Communications District
Specification Sheet 2
Transmitter Site Audio Delay Controllers (ADL)
Automatic audio delay lines shall be used in the creation of the Lincoln County single
channel simulcast system in order to negate the necessity of future adjustments to the
audio delay.
Audio delay modules used at each transmitter site shall be manufactured by Convex
Corp. of Sterling, VA or approved equivalent.
In order to be an approved equivalent product the following specifications must be met:
Flat Gain: Flat gain amplifies or attenuates all frequencies to compensate for
different link losses between the control point and the transmitters. Flat
gain is controlled by the LAN Port or touch-tones. It provides precise
level adjustments that can be made from the control point (voter). This
permits a system to be conveniently adjusted from the central location.
Gain is adjustable from 6 dB loss to 6 dB gain in 0.1 dB steps.
Mounting: Wall or rack mounted
Connections: A two-piece connector with screw locks for audio and power wires.
.
LAN Port: Ethernet 10 Base-T compatible with 100/1000 base-T Networks Control
via Telnet Session with link activity indicators.
1 PPS Input: UTC (Coordinated Universal Time),
One Pulse Per Second input.
Input Impedance >1.5K Ohm/TTL Logic
Time Mark: Low to Hi transition
Minimum pulse width: 1 uSec.
Touch-Tone
Control: Addressable 00 to 98
Detector
Range: 100 mSec minimum
DTMF
LED: on = valid Touch-Tone
Command
ACK: 976 Acknowledge tone
DTMF
Security: 8 Character Sequences
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Specification Sheet 2
Transmitter Site Audio Delay Controllers (ADL) Continued
Bulk Delay
Range: 300 to 700,000 microseconds in 1 microsecond steps
Delay
Measure: 0 to 700,000 microseconds, 1 microsecond resolution
Polarity
Control: Normal or Inverted selection
Automatic or Manual operation.
Frequency
Range: 4Hz to 3400Hz
Gain: Unity / 0.0dB
I/O Impedance: 600 ohm – balanced, floating
I/O Return Loss: Greater than 26dB
Input/Output Level: +10dBm max
Nonlinear Dist: Less than 1%
Noise: -60dBmC typical
Environmental: -30 degrees to +60 degrees C, 0 – 95% R.H.
Power: 10 VDC to 18 VDC / 250 mA max
Dimensions: 1.7” H x 4.25” W x 9.4” D
Weight: 1.3 Lb, 0.6 KG
WARRANTY
Unit shall be warranted to be free of manufacturing defects for a period of one year from the date of shipment.
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Lincoln County Tennessee
Emergency Communications District
Specification Sheet 3 SPECIFICATIONS - Audio / PTT Panel
Audio / PTT Panels are used in radio systems to distribute (baseband voice frequency) audio and push-to-talk (PTT)
control from multiple sources to multiple base stations. Lighted front panel switches provide manual PTT override
control for individual base stations. PTT controls permit base stations to be keyed, disabled, or track normal console
control.
Audio / PTT Panels shall be Model 2240A as manufactured by Convex Corp. of Sterling, VA, or approved equivalent.
In order to be an approved equivalent product the following specifications and operating functions must
be met:
Audio and PTT distribution shall be configurable by 3 internal switches which can be set to fan out inputs to 3, 6, 9
or 12 outputs, or various other configurations. Panel audio distribution capability shall consist of 12 Audio Outputs,
and 12 Audio Inputs. One in each group three audio inputs shall have a mute feature that can be controlled by PTT
logic. The mute feature serves to provide console or voter priority of talk out audio. Audio Input summing
configuration shall be controlled with four switches. Each audio input shall have a, multi-turn, logarithmic, front
panel gain control that provides +/- 6 dB range of adjustment. Each group of three Audio Outputs shall have a (unity
gain) front panel “monitor” jack for setting audio input gains. Each audio output shall have a, multi-turn, logarithmic,
front panel gain control that provides +/- 6 dB range of adjustment. All audio inputs, outputs, and monitor jacks shall
be balanced, floating, and have a 600 Ohm impedance.
PTT distribution capability shall consist of 12 PTT Outputs that track the distribution setup of the audio, and 12 PTT
Inputs that can be distributed. 12 PTT Inputs shall be provided with “ORing” logic that tracks the audio “summing”
setup. Four “mute” logic controls shall be provided at appropriate points for muting one in every three audio inputs.
All PTT inputs shall have a configurable “Key” detector. Key detectors shall accommodate: E/M or TTL / Digitac
logic types with either key polarity. All PTT Outputs shall be independently configurable among: E/M or TTL /
Digitac logic types, with internal “pull ups” provided for TTL / Digitac settings. All PTT Outputs shall have an
individual, lighted, front panel override control that is selectable among: keyed, disabled, or normal - which tracks
the PTT input status.
PTT override control shall be remote controllable through an Ethernet, 10 Base-T LAN Port that is provided on the
rear panel. A remote terminal shall be capable of reading the status of each front panel PTT switch and remotely
overriding panel settings. Audio / PTT Panels shall be packaged in a 1U high, 19” rack mounting format with moniyor jacks, gain and PTT override controls on the front panel. I/O shall be brought out on the rear panel using “Telco” type 50 pin connectors. An RJ-45 modular jack shall be provided on the rear panel for LAN Control. Power options shall include: Universal AC; or 12, 24, or 48 Volts DC. Panels shall have dual redundant power supplies that are individual fused, and front panel power status indicators.
AUDIO COMBINER / DISTRIBUTION AMPS
Frequency Range: 4 Hz to 5000 Hz (0.1 dB Bandwidth)
Response Variation: Less than 0.1 dB, 4 to 5000 Hz
Inputs / Outputs: 24 Floating, Balanced, 600 Ohm
Gain: 0 dB, +/- 6 dB / 24 FP controls
I/O Return Loss: Greater than 26 dB Input/Output Level: +10 dBm maximum
Noise: Less than -60 dBmC
PTT CIRCUITS
Outputs: 12 High Current (100 mA) Outputs
E/M, TTL / Digitac / Relay Closure
Inputs: 12 E/M Type 1-5, TTL/ Digitac
M Type I,II,III: Key <-20 V / Idle >-20 V
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Specification Sheet 3 SPECIFICATIONS - Audio / PTT Panel Continued
M Type IV, V; E: Key >-20 / Idle <-20 V
TTL / Digitac: Key < +2.5 V / Idle > +2.5
AUDIO / PTT COMBINER CONTROL
4 Switches: 1 to 12 Inputs to 12 Outputs, or
1 to 6 Inputs each to 6 Outputs each, or
1 to 3 Inputs each to 3 Outputs each, or
various other combiner options.
AUDIO / PTT DISTRIBUTION CONTROL
3 Switches: 1 to 12 Inputs to 12 Outputs, or
1 to 6 Inputs to 6 Outputs each, or
1 to 3 Inputs to 3 Outputs each, or
various other distribution options.
AUDIO MUTE: One of each input group can be muted by
4 Switches PTT controlled / mute enable
PTT CONTROL Manual / Remote
PTT Switches 12 (3 Position) Front Panel Switches
KEY: Keys transmitter / Lit Red
NORMAL: Console control / Lit Green = PTT
DISABLE: Disables PTT / Lit Red
LAN Port Ethernet 10 Base-T / Control via Telnet
Session ( Windows Hyperterminal )
Link / Activity LEDs
Comm. Simple Menu displays status of all PTTs
Select a PTT to be Keyed or Disabled
ENVIRONMENT: -30 to 60º C, 95% R.H.
I/O CONNECTORS: Two 50 pin Telco Connectors
DIMENSIONS: 1.7" H x 10.4" D x 19" W. / 5 lbs.
POWER: AC, or 12, 24, 48 VDC,
WARRANTY
Audio / PTT Panels shall be warranted to be free of manufacturing defects for a period of one year from the date of
shipment.
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Lincoln County Tennessee
Emergency Communications District
Specification Sheet 4
GPS Master Oscillator
Master oscillators provided shall be Model 8195B as manufactured
by Spectracom Corporation of Rochester, NY, USA, or approved
equivalent.
In order to be an approved equivalent product the following specifications must be met:
Performance Specifications Frequency Outputs: Four buffered rear panel 10-MHz outputs; 750 mV rms sinewave, 50-
ohm impedance 30-dB harmonic suppression. One front panel output.
Quartz Output Accuracy:
locked: ±1 x 10-11 typical, 24 hour average
unlocked: ±2 x 10-9/week typical aging
Crystal Programmable Precision Frequency Offsets: Zero offset plus 4 positive and negative
steps. Step sizes in Hz are: ±3, 5, 7, 9 at VHF Hi and ±0.5, 1.0, 1.5, 2.0 at UHF.
Optional CTCSS outputs: Up to two low frequency RS-485 level outputs, to the nearest 1/3
Hz. Synchronized to GPS on-time point. Replaces data sync outputs. Requires one Model
1118CTCSS filter board per base station to be synchronized.
Optional Frequency Outputs: 12.8-MHz or 5-MHz
1 PPS: TTL signal, accuracy is ±130 nSec typical.
Sync Outputs: 1544 kHz and 2048 kHz @ RS-485 levels.
Data Clock Outputs: 9.6 kHz, 18 kHz, and 1 PPS at RS-485 levels.
Data Sync Outputs: 64 kHz, 18 kHz, 17-2/3 Hz, 33-1/3 Hz at RS-485 levels.
Alarm Outputs: Relay contacts SPDT, 2A @ 30 VDC.
Data Ports: RS-232 and RS-485 interfaces for maintenance and performance monitoring.
Received GPS Signal: L1, C/A Code transmitted at 1575.45 MHz
Power: 115/230 VAC ±15%, 50/60 Hz.
optional 12 VDC; ±13.8 VDC ±20%.
optional 24 VDC; ±27.6 VDC ±20%.
optional 48 VDC; ±55.2 VDC ±20%.
Internal batteries only available with 115/230 VAC power.
Max. power consumption 60W for oven stabilized crystal; 80W for
Rubidium.
Physical & Environmental
Size: EIA 19" W x 3.5" H (2ru) x 12.5" D
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Specification Sheet 4
GPS Master Oscillator Continued
Weight: 20 lbs. maximum
Connectors: Frequency outputs and 1PPS: BNC
Sync outputs: RJ-11
Data clock outputs: DB 9 Female
Data sync outputs: DB 15 Female
Alarm outputs: Terminal strip
RS-485 data: RJ-11
RS-232 data: DB 9 Female
Antenna input: Type-N
AC power: 3-prong connector, 7' cord included
DC power: Terminal strip
Indicators: Power, tracking GPS, oscillator locked, battery ready, battery
charging, battery fault, minor alarm, major alarm
Temperature: -30 to +60°C operating range: Oven stabilized
-40 to +85°C storage range
Humidity: 95% R.H. non-condensing
Antenna and Accessories GPS Antenna Assembly Height: 25"
Cable Connector: N type female
Cable Length: 200' maximum, 40' minimum; with preamplifier, 400' max.
Mounting: Hose clamps to fasten mast to vertical support.
Temperature: -30 to +80°C operating range.
Antenna Surge Protector - indoor Size: 3.83" L x 3.25" W x 1.25" H
Cable Connector: N type female
Grounding Required: No. 6 AWG or equivalent
Temperature: -50 to +60°C operating range.
If power fails, an optional battery maintains oven temperature and keeps the
GPS receiver active, allowing immediate operation after power restoration.
WARRANTY
Unit shall be warranted to be free of manufacturing defects for a period of one year from the date of shipment.
Lincoln County Tennessee
Emergency Communications District
Specification Sheet 5
Outdoor Equipment Shelters
Necessary outdoor equipment enclosures shall be those manufactured by DDB
Unlimited, Paul’s Valley, OK, and carry the model number OOD-62DD-GP-62, or an
approved equivalent
Any equipment shelter used other than the above must comply with the following
specifications:
Dimensions: 62” High X 25” Wide X 34” Deep
Heating and
Cooling: 6000 Btu 220 Volts W/ 400 Watt Heater
Electrical
Connections: 100 Amp Main w/Electrical w/Twist Lock
External Generator Plug
Door Alarm Switches
Interior lighting, Florescent
Spool-Up Side Box
Ground Bar
R3.3 Insulation
Aluminum
Shield: Top cover, shades cabinet from the sun.
Door Handles: Stainless steel – NEMA
Rails: Fully adjustable & anodyne coated.
Doors: Front and rear secured with three point locks and padlocking
handles.
Vents: Front and rear, top and bottom, filters supplied
Lincoln County Tennessee
Emergency Communications District
Specification Sheet 6
Battery Backup Considerations
All radio equipment must be able of being powered by 12 Volt DC battery. Batteries
must have their charged maintained by appropriate charging equipment. Backup batteries
must be protected from the weather. Maintenance free batteries are to be used.
Charger Specifications: Samlex SEC1230A or approved equivalent.
Battery Specifications: Interstate DCM0100 or approved equivalent.
Any equipment other than the above must comply with the following specifications to be
an approved equivalent:
Charger:
Input Voltage: 120Volts AC
Output Voltage: 13.5 Volts DC
Charging Current: Maximum 30 Amps
Minimum 3 Amps
General: Switching Power Supply design.
External switching for adjusting between 2 and 3 stage charging.
Can be used as stand alone power supply/charger or a charger
only. Short-circuit and reverse polarity protection in a lightweight
and compact size. Adjustable for power supply/ charging
functionality. Compatible with deep cycle marine, RV and
industrial batteries.
Battery:
Maintenance Free
Thermally welded case-to-cover bond to eliminate leakage
Carrying Handles
Can be used in any orientation: upright, side or end mounting
recommended
Flame-arresting, one-way pressure-relief vent for safety and long
life
Low-calcium grid alloy for reduced gas emissions and ease of
recycling
12 Volts – 100 Amp-Hour Capacity @ 20-Hour Rate
Ampere-Hour Capacity to 1.75 Volts per Cell @ 77 Degrees
Fahrenheit (25C) 10.5 Volts per 12 Volt Battery.
Maximum discharge current 500 Amps
Both Charger and Battery must be free of manufacturing defects for one year from date
of shipment.
Lincoln County Tennessee
Emergency Communications District
Specification Sheet 7
Manufacturers of Simulcast Capable Radio Repeaters
Any equipment other than the above must comply with the following specifications to be
an approved equivalent:
The following manufacturers have transmitters capable of external high stability
reference oscillators and are capable of maintaining the 1 Hz carrier frequency accuracy.
1. Harris (Ma-Com) Corporation MASTR III
2. Motorola MTR 2000, MTR 3000
3. Kenwood TKR-840
4. Daniels Electronics UT-4E450-00-800
5. Tait T805 Quasi-sync
There may be others.