See the related link below for frequencies.
A: It is a terminology to imply that the scanner will be used at the hi end of frequency as opposed to low frequency
Scanner frequency numbers refer to specific radio frequencies that can be monitored using a scanner radio. These frequencies are often used by various services, including law enforcement, fire departments, emergency medical services, and amateur radio operators. Frequencies are typically measured in megahertz (MHz) or gigahertz (GHz) and can vary by region and service type. To effectively use a scanner, users often need to program in the relevant frequencies for their area or interest.
There are several different scanner frequencies for Floyd County in Kentucky. The 911 dispatcher frequency is 154.80000. Law enforcement is 154.81500, 155.31000 or 155.06250.
The frequency is likely a "birdie" on the second scanner -- meaning that the scanner circuitry produces a signal noise. This is common, and many scanner manuals provide a list of "birdie" frequencies.
To enter a frequency on a handheld Uniden Bearcat scanner, first turn on the scanner and select the appropriate mode (e.g., VHF, UHF). Press the "MAN" or "Hold" button to enter manual mode, then use the keypad to input the desired frequency. After entering the frequency, press the "E" or "Enter" button to save it to a channel. You can then press "Scan" to start searching for active transmissions on that frequency.
155.640
To program a Cobra SR900 police scanner, you'll need to input frequency codes for the specific services you want to monitor. Common frequency ranges for police and emergency services typically fall between 150-160 MHz for VHF and 450-470 MHz for UHF. You can find local frequency codes through online databases or scanner forums. Once you have the codes, enter them into the scanner using its keypad or programming software.
To delete a frequency on a Bearcat BC 147XLT scanner, first, ensure the scanner is in the correct mode (e.g., frequency or channel mode). Navigate to the frequency you wish to delete using the UP/DOWN buttons. Once on the desired frequency, press and hold the "DELETE" button until you hear a confirmation beep. The frequency will be removed from the memory.
To program a frequency of 139.21000 MHz into a BC 142XL scanner, first turn on the scanner and press the "MANUAL" button to enter manual mode. Then, use the keypad to enter the frequency as "139210" (the MHz and kHz are implied). After inputting the frequency, press the "E" or "ENTER" button to save it. Finally, you can press the "SCAN" button to start scanning or "MANUAL" again to listen to the programmed frequency.
The first digital police scanner was invented in the 1970's. Unlike earlier analog version (which were basically AM Radios, as police just used to broadcast using regular radio waves), this scanner was the first to allow you to punch in a frequency to search for the police frequency.
The Cobra SR 900 police scanner may not allow you to program the frequency 155.1975 due to its limited frequency range or restrictions on certain bands. Additionally, if the scanner is set to only accept frequencies within authorized public service bands, it may exclude specific channels. It's also possible that the frequency is not preset in the scanner's memory banks. Checking the user manual for programming guidelines or frequency compatibility could provide further clarity.