[BC] Secondary & Tertiary Tone

[Phil Longenecker]

Wow, talk about Rube Goldberg. Oh, wait, that's another thread on this
list!

<snip
Message: 9
From: "Gary Glaenzer" <gglaenzer at hqradio.com>
Content-Type: text/plain;	charset="iso-8859-1"

From: "Harold Hallikainen" <harold at hallikainen.com>
>
> 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.

Harold;

The older 'logging' system as used in the Gates SC-48 automation used 8
k tone

Of course, this was a VERY CRUDE set-up consisting of a 5-digit number,
encoded as bursts
of 8k corresponding to each digit, and drove a decoder consisting of a
telephone type
stepper driving a modified Victor adding machine with solenoids in place
of number keys

All was well until the steppers (5 in the encoder and one in the
decoder) got some wear on
them............

Somewhere. I have a slide picture, if I can find it I'll send it to you
for inclusion on
your 'page of horrors'

Gary
>unsnip

Phil Longenecker, DoE
Milwaukee Radio Group
414.349.4130