Information Station Specialists is the best known source of travelers information stations, highway advisory radio, advisory signs and services needed to reach motorists with public service information. Learn more about Information Station Specialists.
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 America's Source for Information Radio Systems and Services since 1983


Signal Measurement Radio Receiver
 
Compliance Appliance for Station Operators

Our Tech with New & Old Measurement Devices

Above, Project Manager Tom Coviak compares the size of traditional AM signal-measurement equipment with the new, smaller SMR Receiver.
Measuring Radio Signals

This handheld, battery-operated receiver can be utilized in the field to estimate signal intensities of broadcast radio stations. Though not a calibrated measurement device, it displays relative signal intensity in dbu, which can be used for rough translation to millivolts per meter (mV/m) in a given frequency range using an included correlation chart.

It is also useful for measuring AM-band noise before station installation to determine the quietest frequency on which to broadcast. AM signal intensity is displayed as a two-digit read-out on the lighted front panel LCD display. Batteries are included and pre-inserted, so the unit powers up on-band and ready to operate. Included are illustrated instructions from us detailing procedures for measuring AM signals and AM-band noise.
Assure yourself that your station never exceeds FCC limits.

The SMR Receiver is the first device of its kind capable of measuring and displaying AM signal levels with a useful level of precision.

Our project manager Tom Coviak explains it this way: "The SMR Receiver provides a digital LCD readout that correlates reliably to scientific measurement equipment…for about one-hundredth the price."

Further, Tom recommends, "It’s important to have a means of monitoring, not only to make sure your station complies with FCC limits but also so you can spot adverse changes in your signal that could point to equipment concerns within your station or its environment.”

Issues involving an antenna system, for example, are much less expensive to correct sooner than later, since they can affect electronic components downstream.

Coviak advises, “Now every operator can afford such a receiver, and it should be part of the basic toolkit for their station.”

We provide SMR Receivers with all new radio station packages; and they can be obtained separately, as well. Email us to learn more.
Technical Specifications*
  • AM Receive Band: 520-1710 kHz; 1.0 kHz per channel.
  • Signal Intensity Display: 2-digit 00-99 (dBu).
  • Tuning: Digital 10 khz LCD readout, lighted; auto/manual tuning; auto tuning storage.
  • Power: 3- AA batteries (included), 6 VDC input jack.
  • Audio Output: speaker, 3.5 mm headphone jack.
  • Dimensions : 5.3” X 3.4” X 1.0”.
  • Weight: 7.1 oz.
  • Instructions : manufacturer; guidance sheets for the use of SMR Receiver for AM noise and signal monitoring.
Note:  The Signal Measurement Radio Receiver is unshielded and its readings may be affected by strong electromagnetic fields emanating from nearby antennas to which the receiver is not tuned. Use the receiver for relative signal measurements, such as, to prove a change in signal intensity due to a an antenna or transmitter problem or to compare background noise levels on various radio frequencies. These specifications are subject to change without notice.
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PO Box 51, Zeeland, Michigan, USA, 49464-0051, Phone 616.772.2300, Email Us
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Information Radio Station is a generic term synonymous with Travelers Information Station (TIS), Highway Advisory Radio (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.