Posted in Radio Supplies by admin
on April 30, 2008
“Radio scanner signals delay time from time of transmit” (ham and amatuer please read)?
i have a radio scanner, how long is the the delay time from when the transmission is made untill the time i hear it on my scanner? do i recieve the transmission at the same time the other party do or is it delayed before it reaches my scanner? like when a dispatcher is talking to a police. do i hear that at the push of her button the same time the transmission reaches him? please help……
Radio waves travel at the speed of light, about 186,000 miles per second. The delay time is exceedingly small.
Most police agencies use repeaters to greatly enlarge their coverage areas. What you are hearing is called a “squelch tail”. The transmitting station unkeys, and a short moment later the repeater’s carrier drops. Then the other unit transmits. The delay you are observing is caused by the repeater duplex operation.
www.RadioScannerAntenna.com // RADIO TEST OF ICOM IC-R20 JAPAN RADIO SCANNER – HAM RADIO
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