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Preliminary 8-2002 RSHD Smartcaster Installation Manual

Smart Touch TTL logic Conditionals

On Software versions in the 11’s and later, there is a feature to suppress the display of

Smart Touch connections to avoid interference with the sound and input diagnostics. To

trouble shoot the cable, you must turn “Off” the Smart touch option in User Setup,

question #4. Set this to “N” to enable the diagnostics, note this disables the Smartcaster

from acting on the inputs, so templates will not run from this configuration, but we can

verify the connections between Smartcaster and Smart touch.

At “Rest” with no connection made on the phone line, you will see inputs 25, 26, 27, 28,

29 all in the “On State” (Checked and with a block showing an active input.)

During the login, you will “See” the digit “*” displayed as the digit is decoded, this is the

TTL line 28 showing a “Low” o “off” status. (The block clears, do note that the check

mark remains.) At the conclusion of security, TTL 29 goes to the “Off” state; this tells

Smartcaster the smart touch is active ready.

Decoding the other digits:

DTMF TTL Low

1 25

2 26

3 25 & 26

4 27

5 25 & 27

6 26 & 27

7 25,26 & 27

8 28

9 25 & 28

* 25, 26 & 28

0 26 & 28

# 27 & 28

In return, the Smartcaster can raise some conditions in the Smart Touch. Smartcaster can

pull the relay EBS relay. It can mute the Air output-although that isn’t used anymore.

Smartcaster can swap between the AIR CUE input being returned to the phone line, and

the STUDIO Input. Finally the Smartcaster controls the return audio feed mute on the

phone return.

The Smartcaster does not have confirmation of any of these actions, in other words, the

Smartcaster will read and act on incoming TTL inputs, even if the outputs are not

plugged in or active. Diagnosis of Smartcaster to Smart Touch TTL logic is another

exercise.

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Broadcast Tools DSC-20 Installationshandbuch Seite 42