Selective Calling System. SELCAL is a signaling method which can alert an individual aircraft that a ground station wishes to communicate with it. SELCAL signals can be transmitted over either HF or V. Selective Calling (SELCAL) is an International Civil Aviation Organization (ICAO) managed communications method used to notify aircraft that a ground radio station wishes to communicate. SELCAL works by each aircraft being assigned a different 4-character SELCAL code that allows airlines and communication providers to contact a specific. Who lives in the overlapping zone can send a 71.9-Hz tone to use the KX4V repeater, or a 100-Hz tone to use the WA4ABC machine. Selective Calling Sometimes you want to be a little “selective” about the signals you receive. You want to be available when friends call, but you don’t want to hear all the other noise and chatter on the frequency. Ic cml 15-tone selcall decoder code: fx003qz ic cml 15-tone selcall decoder spare: fx003qz. attention. coverage option available only see details in additional instructions. attention. international shipping, insurance required included in the price of shipping option cash on delivery available single by registered letter or urgent transport to see details in additional instructions. The TD-4 Select ive Call ing Module is an economy touch-tone decoder with one latching output. This versatile mod-ule is primarily designed to mute the speaker of a receiver or transceiver until someone calls by sending a 4-digit dtmf signal, thus making it unnecessary to listen to all the activity on a channel just so someone can call you once.
Due to its small size (1.34'L x 0.85'W x 0.21'H), the ST-809B is ideally suited for installation in portable and mobile two way radios. The ST-809B will respond to an address code of 1 to 7 digits in length, using any of the 16 DTMF characters. Because there are no restrictions in the use of repeated digits, this provides more than 250 million unique address codes.
FEATURES
- Compact Size � for easy mounting in many popular radios.
- PC Programmable � using Selectone Product Manager� Software.
- 1 to 7 Digit Address Codes � over 250 million unique addresses.
- Remote Control Function � provides three latched and/or interlocking outputs for a wide variety of remote control applications. Includes telemetry function to confirm status of outputs.
- Transpond Acknowledgment Tone � provides audible confirmation that the call was received.
- Alert Tone � alerts user of an incoming call.
- Radio Kill Function � to remotely disable a non-paying customer or lost or stolen radio.
- Individual/Group/All Call � for maximum selective calling flexibility.
- Multiple Outputs � for most selective calling and remote control applications.
Selective Call Tone Decoder Software
OPERATION
In a typical mobile radio selective calling application, the ST-809B will mute the radio to block out unwanted channel traffic while awaiting a call. When the correct DTMF address code is received, the ST-809B provides a latched output to un-mute the radio, a momentary output to activate a buzzer or vehicle horn, and an additional latched output to activate a 'call' lamp or LED. In addition, the ST-809B provides a transpond acknowledgment tone to confirm receipt of the call and an alert tone output for local user alerting applications.
The ST-809B supports individual, group, and 'all call' applications for maximum selective calling flexibility. A 'radio kill' function is also provided to remotely disable a lost or stolen radio. The status of this function is stored in a non-volatile EEPROM and may be re-set over the air by the servicing dealer or fleet manager.
Selective Call Tone Decoder Tool
For remote control applications, the ST-809B provides three separate open collector control outputs which may be toggled on or off individually or interlocked in two different modes. Whenever any remote control output is turned on or off, the ST-809B generates a transpond tone to confirm operation.