call sign

(redirected from Call letter)
Also found in: Dictionary.

call sign

[′kȯl ‚sīn]
(communications)

Call Sign

 

a set of characters (code symbols, letters, or numbers) or an audible signal (word, musical phrase, bird call) that serves as the distinctive sign of a radio station—usually for the purpose of identification of the station during reception. As a rule, it is transmitted at the beginning of each period of the station’s operation.

The set of symbols in a call sign identifies the station’s national affiliation. The initial characters are established by the International Radio Regulations. The USSR, for example, uses in this position the letters U and R and such combinations as 4J, 4K, and 4L. The complete structure of a call sign depends on the class (purpose) of a station and differs for broadcasting, official, and amateur radio stations. Call signs for amateur radio stations have a complicated makeup and contain the most information. They often indicate through a code the station’s operating wave band (shortwave or ultrashortwave), the station’s group (a collective or individual station) and site (in the USSR—the Union republic, oblast, and amateur-radio region), and the individual letter symbol or registration number of the station.

I. V. KAZANSKII

call sign

Any combination of characters or pronounceable words used primarily for establishing and maintaining communications. It identifies a communication facility, a command, an authority, an activity, or a unit. A call sign should have at least two syllables (e.g., Red 1, Pan Am 550).
References in periodicals archive ?
The University had sent call letters to all eligible candidates for participation in the entry test, a press release said.
While sharing details of the survey, they said that Budget Call Letters delayed, only 10 districts have functional websites and 111 posts vacant in district budget branches, as per the 'Study of Budget Making Process at District Level in Punjab.
The expected change in the per-enrollee subsidy is up from an increase of 0.25% included in a draft program proposal for 2018 posted in February, according to a 2018 call letter summary sheet.
Negotiations over the call letter, and other program rules and standards, has become a part of the bidding process.
Those who have not received the call letter are also advised to reach on due time for participation in entry test and their participation would be decided on the spot according to the available record.
For those unfamiliar with translator call letter protocols, the 233 refers to its FM channel number, the alternative to citing its MHz dial position.
Those students who have not received the said call letter are advised to contact the nearest Regional Office of the university or the Department of COL MBA/MPA Programme Room No.1 Block No.
"We have always felt that the radio station represented an important outreach to the community, and we are truly pleased that the call letter change will tie the station even more closely to UCO," Pam Washington, dean of UCO's College of Fine Arts and Design told the Edmond Sun.
if any candidates who do not receive the call letter roll number slip up-to Sept 10 should contact the KP PSC office, 2-Fort Road Peshawar Cantt on Phone No.