Radio Design Labs FP-CH8

The FP-CH8 is an electronic chime generator that produces eight different synthesized chimes. Each chime can consist of up to 3 tones and 3 harmonics selected to produce sonically natural effects. Certain chimes are single tones and some are a sequence. Each of the 8 chimes is triggered by an individual external closure to ground. A momentary closure to ground is required to start a chime. A single additional CONT (continuous) terminal is also provided. Each chime plays once unless the CONT terminal is grounded. The continuous function causes a chime strike or sequence to repeat until the CONT terminal is ungrounded. This function causes tone chimes (Chimes 4 and 8) to be extended in duration until the CONT terminal is released. Background music or paging audio may be connected to the MUSIC IN input. When a chime plays, the music source will be quickly faded to a level set on the front-panel DUCKING trimmer. The ducking fade depth may be adjusted from 0 dB to fully off, allowing chimes to be mixed with the music or to interrupt the music. The front-panel CHIMING indicator illuminates while music is ducked and a chime is playing. WAIT and IGNORE terminals are provided to prevent or delay chiming action.

Features:

• 8 Individually Selectable Electronic Chimes
• Selectable Single or Repeated Chime
• Synthesized Bell Harmonics for Natural Sound
• External Chime Actuation
• Input for Background Music or Paging Audio
• Automatic Ducking

Specifications:

• Music Input:  50 kO balanced or unbal, +22 dBu max.
• Frequency Response:  20 Hz to 50 kHz (+/- 0.5 dB)
• THD+N:< 0.05% (unity gain, 50 Hz to 20 kHz)
• Noise below +4 dBu:< -70 dB (unity gain)
• Headroom:> 16 dB (above +4 dBu)
• Gain:  Unity to +22 dB (adjustable)
• Ducking Fade Depth:0 dB to fully off (adjustable)
• Output: 150 O balanced, + 4 dBu or 75 &ohm; unbal.
• Trigger Inputs (8):Trigger on high to low transition, 0.5 mA
• Control Inputs (3): WAIT (play delay), IGNORE (no playback), CONT (continuous repeat)
• Control Outputs (2): CHIMING (Open-collector low @ 50 mA), EOC (low 100 mS at end of chime)
• Power Requirement: GROUND-REFERENCED 24 to 33 Vdc @ 100 mA
• Dimensions: Height: 1.20 in. 3.05 cm  Width: 3.25 in. 8.26 cm  Length: 6.41 in. 16.28 cm