[BC] Secondary & Tertiary Tone

[Harold Hallikainen]

> Can't remember the audio frequencies used back then? Wasn't one real high
> and one real low?
>
> Thanks
>
> Mark

For cart machines, primary (stop) tone was 1kHz. Secondary (EOM) tone was
150Hz. Tertiary (often used to advance slides on TV) was 8kHz. Logging was
generally FSK at 3.5kHz. You can see a logging system with a Broadcast
Products AR-2000 and a bunch of carousels at
http://www.hallikainen.org/gallery3/main.php?g2_itemId=25197 .

Harold

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