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5915
Stereo Tone Generator Card
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A standard (160 x 100mm) Eurocard
containing an Audio oscillator and gating to produce
standard ITV/ILR Stereo Tone Ident (5915a) or BBC
Stereo Tone Ident (5915b).
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The board is
assembled as either an ITV or BBC unit and must be ordered
accordingly. |
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The circuitry
features a zero crossing switch for the tone pulsing.
Two changover relays are also provided that can be switched
remotely to insert the tone generator into circuit,
these relays fail safe to a straight through condition,
in case of power failure or when the control signal
is released. There is also power failure detect circuitry
on the board which gives out an auxiliary relay closure
in case of any power rail failure. This is particularly
useful in alarm systems. |
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The actual oscillator
frequency is preset to either 900Hz (version b) or 1kHz
( version a). The gating can be switched out if required
to give a steady tone. |
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| Stock
no. 02-110 |
5915a
Price: |
£120 |
| Stock
no. 02-111 |
5915b
Price: |
£120 |
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