Simulcast Technical SPECIFICATIONS – General
Scope of Services
XXXXXXXXX is seeking a turn-key Radio System Upgrade of their "simulcast" radio system which will
include new Base Stations, Antennas, and other elements of their public safety radio system.
1) Description of existing system
a) The current radio system is a simulcast system. The received audio from the sites is voted and all sites retransmit
the best audio simultaneously
b) The frequencies are transmitting on XXX.XXX MHz with a tone squelch frequency of ZZZ.Z Hz and receiving
on YYY.YYY MHz.
c) The FCC call sign for the system is XXXXXX
d) The antennas are XXXX.
e) The transmitters are continuous duty XXXW full duplex transceivers.
f) All the sites are connected by a XXXXXXXXXXXXXXXX
g) All of the radios and microwave have duplexers configured for single antennas for transmit and receive.
2) Specifications for upgraded system;
a) No use or modifications to the replaced equipment not authorized by the equipment manufacturer is allowed.
b) Replace all Base Station transmitters:
1. Transmitter shall be ..............
2. Shall ........
3. Shall ..........
4. Shall accept and lock to an external 10MHz frequency reference
5. Shall accept an external CTCSS source for retransmission
c) Replace the Receiver Voter Selector:
1. Shall provide quality detection to select the best receiver location.
2. Shall operate with industry standard pilot tone operation from the remote receivers
3. Shall provide transmit tone control repeater operation function.
4. Shall be field configurable to select voting site audio delay as needed.
5. Shall be field configurable to select voter hold delay, revote timer, and voting threshold adjustment settings.
6. Shall operate –20C to +60C temperature range.
d) Replace all High Stability Reference Oscillators:
1. Shall provide highly accurate frequency sources with internal oven stabilized crystal oscillators.
2. The outputs shall be locked into the United States Navel Observatory via the NAVSTAR Global Positioning
System to provide continual automatic frequency control, compensating for aging and temperature drift.
3. Shall provide a output accuracy +/- 1 x 10 –11th typical, 24 hour averaged in the locked mode.
4. Shall provide +/- 2 x 10 –9th / week typical aging in the unlocked mode.
5. Shall be powered by the 48VDC cabinet battery supply.
6. Shall provide a synchronized CTCSS tone output for each of the simulcast transmitters at each site.
7. Shall have an operation temperature range of –30C to +60C.
8. Shall be provided with a external GPS antenna and antenna line surge protector.
e) Replace the Simulcast Audio Equalizer and Delay Unit
1. The equalizer shall provide audio phase and amplitude correction to all simulcast transmitters.
2. A Bulk Delay shall be provided to delay all audio frequencies to compensate for differences in transmission
delay to diverse transmitters.
3. Flay delay amplitude correction to compensate for loss in transmission paths.
4. Delay / Amplitude correction to provide adjustments at 200Hz increments across the audio band 600Hz to
3200Hz.
5. Adjustment of the Delay / Amplitude shall occur from a test set that generates a computerized correction file.
This shall be downloaded into the equalizer panel using control software.
6. Shall provide bulk delay 0 to 500,000 microseconds in 1-microsecond steps.
7. Frequency range 56 to 3400 Hz
8. Pass band control +/- 5db in 120 steps (.08db) for each of 14 equalizer sections spaced at 200Hz intervals
between 600 and 3200Hz
9. Amplitude Equalizer boost / cut at 300 and 3200Hz amplitude range –6 to +15db
10. Temperature range 0C to +50C operating.
f) Replace all Microwave radios with new radios:
1.
2.
g) Replace all base antennas with antennas of equal or better specifications, along with any associated coax jumpers.
h) The microwave antennas are to be refurbished and any worn out parts replaced.
i) The transmission lines are to be inspected and any defects corrected. The connectors are to be re-waterproofed or
replaced as needed.
j) The grounding and lightning surge arrestor components are to be replaced as per EIA standards:
1. AC Power surge arrestors (Polyphaser PLDO-120US15A or equal)
2. Coax surge arrestors (Polyphaser IS-50NX or equal)
3. All coax, cabinets and antennas to be grounded to site ground system
4. All underground connections to be cadweld
5. All underground wire to be #2 copper solid tinned
k) Detailed specifications of all major components and a system diagram and description shall be supplied with the
proposal
l) As part of the proposal, a detailed schedule of the installation must be included which will be part of the selection
process. It must state the maximum down time of the system being replaced.
m) The proposal should be itemized with the component parts listed.
2) Installation
a) Equipment acceptance testing; system warranty; maintenance plan and mandatory response time; system
acceptance plan. Price Proposal table/form Installation schedule must be proposed to avoid radio downtime during
peak service hours, Monday through Friday from 6:00 AM to 8:00 PM.
c) Installation must be done in accordance with Site Owner, FCC, and EIA standards.
d) The system must be installed by MM/DD/YYYY.
e) As Built System paper drawings (CAD Drawings) shall be provided for all sites. An electronic copy shall also be
provided
f) Two complete paper sets of service manuals and system installation and alignment procedures shall be supplied
for all equipment. An electronic copy shall also be provided
3) System Acceptance:
a) The mobile communication coverage and voice quality must be equal or better than the existing coverage now
using the existing mobile radios. It is the vendor’s responsibility to test and document the existing coverage
before any changes are made.
b) Customer's personnel will test the coverage and voice quality after the installation is completed. The Vendor will
be given a reasonable opportunity to correct any deficiencies which must be finished before MM/DD/YYYY.
4) Warranty;
a) The manufacturer’s warranty shall apply for all parts and assemblies for a minimum of 1 year after system
acceptance. The length of this warrantee shall be noted on the proposal.
b) Labor warranty shall be 30 days except where poor workmanship is evident; in which case, the warrantee shall be
one year.