• Pays
• Royaume Uni

• Fabricant / Marque
• DJS Electronics Ltd.; Weymouth

• Année
• 2010 ??

• Catégorie
• Boîte de construction (composants et manuel) ou instructions

• Radiomuseum.org ID
• 356372

Cliquez sur la vignette du schéma pour le demander en tant que document gratuit.

• Principe général
• DSP, traitement numérique du signal

• Gammes d'ondes
• - sans

• Tension / type courant
• Alimentation externe ou alimentation principale / 7.5-15 Volt

• Haut-parleur
• - - Pas de sortie basse fréquence

• Matière
• Matériaux divers

• De Radiomuseum.org
• Modèle: CTCSS Tone Encoder CTCSS47 - DJS Electronics Ltd.; Weymouth

• Forme
• Chassis (pour intégration dans meuble)

• Dimensions (LHP)
• 30 x 40 x 9.7 mm / 1.2 x 1.6 x 0.4 inch

• Remarques

• The CTCSS47 tone encoder module uses a Microchip PIC16F627A 8-bit flash-based CMOS microcontroller with 128 bytes of EEPROM data memory. The microcontroller is programmed to generate 47 of the most commonly used CTCSS* tones from a 10 MHz crystal reference. The tone frequencies can be selected by switch, or by placing up to 5 jumpers in 6 positions. A subset of the 9 UK standard repeater tone frequencies (plus 100Hz, which is avoided in countries with 50Hz mains) are grouped together for convenient selection by a 4-pole switch. The accuracy of the tones is better than +/- 0.02%.

  A 78L05 regulator provides the 5 V required to power the module from supply voltages from 7.5 to 15 V DC via a series diode for reverse polarity protection. A Microchip MCP601 CMOS op amp provides a near sinewave output for the transmitter modulator, via a preset potentiometer that allows the amplitude to be adjusted up to a maximum of about 2 V p-p at the lower frequencies and 600 mV at the highest.

  The encoder was initially developed by CS Technology Ltd, and could be supplied in kit form or fully assembled by DJS Electronics Ltd, which purchased that company in 2013. Production ceased because of the limited availability of some parts, minimum order quantities, price increases, and finally the closure of DJS Electronics in 2024.

  *CTCSS (Continuous Tone-Coded Squelch System) is a type of in-band signaling used to prevent interference from other users on a shared two-way radio channel. By adding a low-frequency audio tone to the voice transmission, CTCSS circuitry mutes signals from users who are using a different CTCSS tone or no CTCSS at all. This helps to ensure clear and uninterrupted communication for specific groups of users on the same frequency.

• Poids net
• 0.020 kg / 0 lb 0.7 oz (0.044 lb)

• Littérature
• - - Manufacturers Literature (User manual)

• Auteur
• Modèle crée par Bruce Taylor. Voir les propositions de modification pour les contributeurs supplémentaires.

• D'autres Modèles

• Vous pourrez trouver sous ce lien 1 modèles d'appareils, 1 avec des images et 1 avec des schémas.
  Tous les appareils de DJS Electronics Ltd.; Weymouth