TELOS TWOX12 USER’S MANUAL
INSTALLATION
CHAPTER 2 34
Phones and Remotes
When on remote, to save money and hassle, calls are usually received at the studio, rather
than at the remote site. In this situation, caller audio must be fed to the remote talent so that
they can hear and respond to callers. Moreover, the callers need to hear the talent. In many
cases, the remotes are sufficiently distant that talent cannot monitor the station for the caller
feed. Even if they could, the profanity delay would be a problem, since the talent needs to
hear the callers pre-delay.
All perceptual codecs (Such as the Zephyr or ZephyrExpress) have too much delay for
talent at remote locations to hear themselves via a round-trip loop. Therefore, another mix-
minus is required to feed the codecs.
The talent hears callers via the codec return path. As before, you feed this return with mix-
minus: a mix of everything on the program bus minus the remote audio.
As for the second half of the equation, the callers hear the talent because the remote feed is
added to the telephone mix-minus bus. This is no problem if you have a set-up that permits
selective assignment to the hybrid mix-minus.
c
MIX- MINUS TIP!
If you cannot create a separate mix- minus for occasional remotes, you may be able
to borrow one of your hybrid mix- minuses and console input for the duration of the
remote. Just make sure that your operators understand that only one of the two
hybrids is active.
A problem with this arrangement is a result of a hybrid with too much leakage combined
with the system delay. If the hybrid isn't doing a good job of preventing the send audio
from leaking to its output, the special remote send mix-minus is corrupted. Remember, if
any of the announcer audio from the remote site is returned via the monitor feed, it will be
delayed by the digital link, causing an echo effect.
The Telos TWOx12 really shows its stuff in this situation. Because it has so much trans-
hybrid loss, the leakage is not at all likely to be a problem. When there is a problem, you
can solve it by increasing the DuplexLevel (ducking) selection in the Audio menu. See
section 7.3.1 for details.
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