The Motorola Visar is portable two-way radio. It can be used for communication between a group of people that all have access to the transmissions. Knowing the specifications for the Visar will help you to determine if it suits your needs.
Frequency
The bandwidth or frequency of the Visar can operate under VHF, UHF and 800 megahertz (MHz) wavelengths. For the VHF format, a range of 136 to 178 MHz is possible to transmit between, while the UHF format transmissions between 403 to 470 MHz or 450 to 520 MHz can be achieved. Communications between 800 to 821 MHz, as well as 851- to 866 MHz can occur on the 800 MHz wavelength. The Visar only has 16 channels of communication, with no options of broadening the amount.
Size and Battery Life
The weight of the Visar is 11.0 ounces. The battery life is all dependent on the wattage of your outputs, or outgoing calls. With VHF, outputs can be between 1 and 5 watts, during which the battery life will last 5 hours at the lowest 1 watt of output. UHF has an output of 1 to 4 watts and also has a battery life of 5 hours at 1 watt output. The 800 MHz wavelength has an unvaried output of 3 watts, for which the battery will last 4 hours.
Channel Spacing
Channel spacing refers to the amount (measured in kilohertz, or kHz) between frequencies. The spacing is the same for both VHF and UHF, and is either 12.5, 25 or 30 kHz. For the 800 MHz wavelength, the spacing is a set 25 kHz.
Sensitivity and Selectivity
The sensitivity refers to the balance between the wanted noise (your transmission or received transmission) and the unwanted static noise, often referred to with the term SINAD (signal-to-noise-and-distortion ratio). With 12 decibels (dB) being the maximum allowable noise level that does not drown out speech during transmission, all three wavelengths have a noise output of no more than .28 microvolts (µV). The selectivity refers to a radio's ability to only respond to the channel that it is tuned to. Any variation is measured in decibels and with VHF, it has a range of -65 dB for 12.5 kHz and -75 dB for 25 kHz. UHF has a range of -63 dB for 12.5 kHz and -73 dB for 25 kHz. 800 MHz has a range of -72 dB for 25 MHz.
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