Founded in 1983, Information Station Specialists is the USA's best
known source for Information Radio Stations (TIS/HAR), advisory
the specialized services required to
transmit spoken messages to citizens − the only such source
providing products entirely made in America.
The HQ5.1 Broadcast Quality Audio Processor has
been certified by the FCC to operate in tandem
with the TR6000 (TIS/HAR) Transmitter to effect
an increase in broadcast audio quality. The
processor replaces the TR6000's audio filter and
increases the audio bandwidth of the broadcast
from 3000 to 5000 Hz, adding compression and
limiting functions. The result is a brighter,
louder and more intelligible reception that
often can be monitored at a greater distance.
This professional audio
processor that meets National Radio
Systems Committee (NRSC) mandated transmission standards for
AM broadcasting within the United States. Incorporates tight peak
control, adaptive pre-emphasis and low-pass
filtering. Meets new FCC audio filtering
standards for expanded bandwidth Travelers
Information Radio Stations (TIS). Certified by
FCC on 2-18-2016 for exclusive use with the
Transmitter from Information Station
"The new upgrade
to our station has dramatically improved the
strength and clarity of our signal. Thanks."
Bernardsville, NJ, Police Department
"Just wanted to let you know I
upgraded our transmitter with the HQ5.1
this week. Big improvement!"
Auburn, WA, Emergency Management Department
filter made a big improvement in signal
Salt Lake City, UT, Airports Department
"Gentlemen, the equipment
Emilio J. Gervasio
Standard Parking/O'Hare Airport
This compares to what a conventional
Travelers Information Station has
sounded like until recently. The audio
you are hearing is natural but is
filtered through the 3000 Hz filter that
these radio stations have been required
to have in their transmitter circuitry
Here is the same transmitter
broadcasting the same audio file that has been
equalized brighter and limited. This is more what
a more modern "file-based" station
sounds like today. Better, but there’s still no audio
above the 3000 Hz cutoff.
HQ5.1 Broadcast Quality Audio Processor
Now listen on the same automobile radio
to that same natural audio file being
broadcast by the
same TR6000 Transmitter
with the HQ5.1 Broadcast Quality Audio
Processor added into the audio chain.
Bandwidth is now 5000 Hz and the
Processor is adding compression and
preemphasis, too. The increased intelligibility and
loudness of the resulting broadcast are evident.
The built-in peak controller can enhance or
replace existing limiters. Ability to serve as an
effective stand-alone processing system that
can also be combined with pre-processing
devices to create transmission signatures
through a built-in peak controller.
Enhances signal intelligibility through
adaptive pre-emphasis. A separate
pre-emphasis protection limiter
independently controls high frequency
program energy for best use of the NRSC transmission characteristics. Feed-forward pulse-width-modulation
techniques are used in limiter and adaptive
pre-emphasis stages for colorless,
quasi-digital control of the program signal.
Eliminates interference to adjacent
channels via a sharp-cutoff, low-pass
function. Active multiple low-pass
filtering exceeds requirements for
adjacent-channel protection, even under
adverse conditions. An overshoot compensator
eliminates any need for splatter-generating
clippers to assure full modulation.
Distortion: less than 0.2% THD, 10Hz-cutoff
with peak limiter off. Less than 1% THD,
200Hz-cutoff with peak limiter on.
Noise: better than 75dB below full carrier
modulation (assuming NRSC de-emphasis).
Fixed pre-emphasis: The US version follows
the “truncated” 75µs curve specified by the
NRSC transmission standard. Alternative
versions employ pre-emphasis appropriate to
the service and the cutoff frequency.
Input: active-balanced, bridging; accepts
nominal program line levels between -15dBu
Output: active-balanced, 600-ohm resistive
sources; delivers 0dBm to +15dBm into 600
Output: positive peak
amplitude is continuously variable up to
Power requirement: 105-130VAC or
210-255VAC, 50/60Hz; 8W.
Size and weight: 1-3/4”H x 19”W
x 7”D (1U); 7 lbs.
Bill Baker (phone 616.772.2300, extension
102) can provide a formal quote.
US Patents: PowerPlane Flex Factory-Assembled Groundplane (5,495,261),
Vertical Profile Antenna System (7,027,008).
Trademarks: 2XTM Signal
Booster, ALERT AMTM
Emergency Advisory Radio System, AP55TM
Digital Message Player, ENcastTM
Emergency Notification Broadcast System, FAS6000TM
Flashing Beacons & Controller, FASTrackTM
Quick-Erect Sign, Flashing ALERTTM
Sign System, HearMoreInfoSM
Internet Broadcasts, Information Station Specialists, InfoRadioTM
Format, Information Station ClassicTM,
Information Station IPTM,
Radio Station, IP8TM Digital
Message Player, IP76TM
Digital Message Player, ITS6000TM
Highway Advisory Radio Network, LIGHTNINGTM
LED Portable Changeable Message Sign, NX8RTM
Digital Message Player, OP2200TM
On-Premise Radio Broadcast System, Potential Interference Notification
ServicesTM (PINS), Power
Loss Notification ModuleTM,
Factory-Assembled Groundplane, PowerSTATTM
Portable Power Source, evINFOSM
Portable Information Radio Service, RadioSTATTM
Portable Emergency Advisory Radio Station, RoadRunnR®
Portable Highway Advisory Radio Station, Signal Measurement RadioTM
Internet Broadcast Service, StealthTM
Sign, StreamCastSM Internet
Broadcast Service, Stylized ISS LogoTM,
SX200TM Wattmeter, TR6000
Vertical Profile Antenna System, VoiceStarTM
Portable Highway Advisory Radio Station (with our without Changeable
Message Sign), Wireless Audio LinkTM.
Information Radio Stations is a generic term synonymous with Travelers
Information Stations (TIS), Highway Advisory Radio Stations (HAR) /
Highway Information Systems & Low Power Radio Stations (LPR). Operation
of the stations is governed by FCC Part 90.242 Rules. A FCC license is
required. Information Radio Stations may be fixed or portable.
Subcomponents may include transmitter, antenna and ground system,
digital voice player, wattmeter, cabinet with conventional or Corbin
locks, lightning arrestors for RF, power and telephone lines, coaxial
cable. Most stations employ black maximized antennas to discourage ice
accumulation and security measures to prevent unauthorized program
access. Options include synchronization, battery backup, solar power,
remote programming by local, network or telco, multi-station audio
distribution via RF or LAN / WAN or wireless network.