- Selective Call Tone Decoder Free
- Selective Call Tone Decoder Download
- Selective Call Tone Decoder Software
- Selective Call Tone Decoder Tool
Aviation Selective Calling System
SELCAL Encoder
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. Multi-Format Decoder with ANI in a Metal Dash Mount Box. Midian’s UD-1B DMH Series offers decode, transpond and ANI for DTMF, five-tone, pulse tone and two-tone. The UD-1B DMH offers multiple decode addresses for selective calling and functions such as Deadbeat Disable. Qty Discounts, Worldwide Shipping. The SELCAL decoder on board each aircraft is assigned a unique 4-letter code. This allows the receiver audio to be muted until that code is received, alerting the crew there is a radio call for them. This way, they do not have to be distracted by radio traffic intended for other planes.
The low cost software-based SELCAL Encoder
Windows 10™ Compatible
Used by airlines and aeronautical radio operators to 'page' specific aircraft during flight via HF or VHF radio. Quick installation and setup, simple to use.
32 Tones sper ARINC 714A Mark 4 specification (v.4.1)
Unlimited user-defined Memory Presets and quick lookup (v.3.1)
Control any transmitter directly with ComTekk Universal Radio Interface
Auto mode-switching AM/SSB for CODAN radios (v.4.0)
Functions as a radio console with computer headset
PTT (Push-to-Talk) via serial/USB or VOX
Log file keeps record of SELCAL calls sent
Security features keep codes and settings confidential
Built-in calibration system for high accuracy
(not required when used with ComTekk Universal Radio Interface).
15-Day Free Demo available
Read on for complete description...OR see the online User Manual.
For ordering information, click here.
How it works:
ComTekk SELCAL generates Aviation SELCAL or selective-calling tones using your computer's sound card:
ComTekk's SELCAL system is compatible with virtually any radio when used with our Universal Radio Interface
(Note: EIA tone-remote is not currently supported by ComTekk SELCAL)
SELCAL is an international signaling protocol which allows airline radio operators to contact specific aircraft over HF of VHF radio while in flight. The SELCAL decoder on board each aircraft is assigned a unique 4-letter code. This allows the receiver audio to be muted until that code is received, alerting the crew there is a radio call for them. This way, they do not have to be distracted by radio traffic intended for other planes.
ComTekk SELCAL (meets ARINC-714 / ICAO Annex 10 international standard) is a dual-tone (2x2) format similar to DTMF, but uses 32 different tone frequencies. Each digit or letter in the code sequence refers to an audio tone frequency. The first two digits comprise the first tone pair, and the last two digits determine the second pair of tone frequencies.
ComTekk SELCAL includes a convenient auto-calibration system which compensates for errors in the sound card's timebase, ensuring accurate tones are produced. Accuracy is critical, as the tone frequencies must be very precise in order to be decoded by the aircraft's electronic decoder.
NOTE:
For best results, we highly recommend using our Universal Radio Interface, which has a temperature-stabilized quartz oscillator for highly accurate tone encoding.
We cannot guarantee the specifications of any third-party equipment used with or controlled by our software products. Use of our software is limited to the terms and conditions as provided within the included end-user license agreement (EULA) available for download at our website.
Due to it’s technical nature, installation and alignment should only be performed by a trained, qualified avionics technician.
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ComTekk SELCAL System Complete system includes:
| |
ComTekk SELCAL Encoder Aviation SELCAL encoder software only, for single computer. (includes software and online manual) To upgrade from Version 2, please contact us. |
Notes:
* If connecting directly to computer, Sound card isolators are highly recommended to prevent possible damage to sound card and computer (included in kit interface). The author assumes no liability for damages of any kind.
Selective Call Tone Decoder Free
For more information on connecting to sound cards, click here. Direct radio interface unit supplied with kits. Call or send an email for more information.
**Minimum System Requirements:
Microsoft Windows XP/Vista™/7, 8, 10
Software requires less than 20MB disk space
2.0GB RAM
16-bit audio device or ComTekk radio interface(recommended)
We believe in giving back to those who made the ultimate sacrifice for their communites.
ComTekk is a proud supporter of the
National Fallen Firefighters Foundation.
Selective Call Tone Decoder Download
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Selective Call Tone Decoder Software
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Selective Call Tone Decoder Tool
Dawn
Member
Some of the early tube based cb's as was noted below with the response on the Johnson's had an external accessory for selective calling. While the option was available and the interface present, either there was never an accessory developed or there was little interest. Browning, Sonar, Johnson, Pace, and Lafayette in my experience were the only ones I've ever seen a factory manual mention availability of such a product. There apparently was a standard developed for the original, proposed, H.E.L.P plan that never reached fruition with the so-called 25 channel expansion that didn't happen. The Lafayette comsat 23 channel base that was identical to the earlier, short lived 25 channel HELP capable unit I worked on during the 70's still had the connector on the rear and it was noted in the schematic.
Other then Johnson's, I never seen a bonafide CB selective call system master call or mobile slave unit.
Several of the companies listed above made an AM business band single channel version of their CB's that was capable of power. Only system I worked on like this was a Kaar system in '73 that the company I worked for still supported. Pace and HyGain still sold units as late as '76 that I know of. The Kaar units looked much like a Sonar with no channel selector and were fitted with an aftermarket Speedcall IIRC LC filter based two single tone decoder that operated either group or individual call that was fitted after CB user incursion began to occur sometime after the 60's and wasn't a factory product.
This is a fascinating, but seemingly forgotten part of CB's past that I've always wanted to know more about. It would probably be expensive back then. Most encode/decode sytems even at audible frequencies were based on resonant reeds or torridal filters that required very precise tolerance parts. Phase lock loop chips like the '565 and '567 appeared during the early 70's along with phase shift oscillators or op amp based gyrator filters that could be forced into oscillation for encode at the same frequency. That still would have cost quite a bit and even then, were extremely unreliable due to drift if they used tunable components like 10 turn pots.
CB and AM would require an audible tone signalling system. The problem get much more complex with SSB and I have decades of experience with those system in marine and terrestrial hf networks used in latin america that the selcal units would have cost more then a high end SSB CB mobile or base. I doubt anyone ever used those types of systems on CB.
Any of you have any first hand experience with CB selective call with spec. details in particular or manuals? Nothing that I want to do, just want to understand what the companies were offering. While many old
CB books mention this in passing, none are ever specific about any of the systems used.