Products › Tone Lab
Tones in. Contacts out.
Network cues, touch-tones and subaudible tones still run a lot of radio automation. These boxes hear them, close the contact, and keep the tones off your air.
Program audio, 20 Hz to 20 kHzListening
201001k10k Hz
Every touch-tone, mapped.
Each key is two tones at once, one from a row and one from a column. The DTMF-16 decodes all sixteen, A through D included. Point at a key.
1: 697 Hz + 1209 Hz
Program any output of the DTMF-16 to a single key or a sequence of up to six. Its anti-falsing delay ignores brief passages of program audio that happen to contain touch-tone frequencies, and still catches the long tones some satellite news and sports networks send for affiliate breaks.
Four ways to answer a tone.
A capture of the same touch-tones driving DTMF-16 outputs set four different ways. Every output is set on its own.
Touch-tones inAudio input 1 2 1 4 3
MomentaryOn key 1
Latching1 turns on, 2 turns off
Interlocked AOn key 1
Interlocked BOn key 4, turns A off
Trailing edgeAfter key 4 ends
- MomentaryCloses while its tone plays.
- LatchingOne code turns it on, another turns it off.
- InterlockedLike radio buttons: turning one on turns the others off.
- Leading or trailing edgeFires as the tone starts, or after it ends.
Subaudible, done right.
The low end of a network feed, from the SEN-6 that sends the cue to the SUB-03 that catches it.
Program in
Ordinary audio has energy at 25 and 35 Hz too.
1525354560 Hz
SEN-6
SEN-6 out
Notch filters clear 25 and 35 Hz, then the cue goes in.
1525354560 Hz
Cue at least 10 dB over the program
SUB-03
SUB-03 out
The relay closes, and the tone is cut 30 to 40 dB in the audio it passes on.
1525354560 Hz
25 Hz relay
The numbers, from the manuals.
DTMF-16Programmable touch-tone decoder
- 16Outputs: 4 relays, 12 optocouplers
- 5,000 VIsolation on the optocoupled outputs
- 150 mAEach optocoupled output can sink
- 6Digits in a sequence
SUB-03Subaudible tone decoder
- −20 to +8dBm input, balanced or not
- 30–40 dBCut in the tones at the output
- 600 ΩLoad its balanced output drives
- 3Dry relays: 25, 35 and combo
SEN-6Subaudible tone encoder
- +16 dBmPeak output into 600 Ω
- 90 dBDynamic range, at its best
- 6Trigger inputs, one per tone
- 10 sTest mode for setting levels
Tell us what your network sends. We'll tell you what decodes it.
If that number drops your call, use 352-231-7203. Prefer e-mail? sales@circuitwerkes.com