HF

High Frequency

radio communication services from 1.8 to 29.7 MHz, used for long-range communications, the only band used for worldwide communcations other then mircowave and UHF satellite services

"Johnson, get Washingtion on the HF"

by IrishRepublicanArmy October 12, 2003

T-3 line

high speed connection to the internet

44.736 mbps

I wish i could have a T3 line.

by IrishRepublicanArmy December 29, 2003

APCO P-25

New digital modulation type, labelled as "APCO Project-25" P-25 pretty much is the same modulation that cell phones use. P-25 is supposed to give better voice quality, but there really is no differance. Plus I need to buy a new radio scanner now.

There are two types of P-25, 3,600 baud and 7,200 baud speeds.

by IrishRepublicanArmy December 10, 2003

PSK31

A digital transmission mode -- Phase Shift keying with 31.25 baud rate

PSK31 is one of the better HF operating digital modes.

by IrishRepublicanArmy January 01, 2004

callsign

1) The identifying code letters or numbers of a radio or television transmitting station, assigned by a regulatory body. Also called call sign or call letters.

2) (military) code word for aircraft, ship, etc, used in radio communications.

Dark 87 this is Havoc 12, switch to 11175 and vector out to DZ.

by IRISHREPUBLICANARMY December 26, 2003

Jammer

(radio)

a radio transmitter which is designed or modified to send a signal which deliberately inferes with another radio signal. (see also FRS jammer)

Jammers are most widly used by thegovernment and military in order to make it harder for the enemy to use their radio systems.

Also fun when directed at a rap radio station.

Dude! I jammed the rap radio station with the Spongebob theme song for 36 hours!

by IrishRepublicanArmy November 13, 2003

Squad 51!

An exclamation, from the 70s show Emergency.

It comes from the fire department dispatch guy that goes "Squad 51!"

"(random DTMF tones) Squad 51! (insert random dramatic event here)

"roger, squad 51, KMG365"

by IrishRepublicanArmy November 28, 2003