Tieline ViA User Manual page 214

214 ViA User Manual v2.0
4. Click the Connect button to dial.
Monitoring PPMs
Set audio levels so that audio peaks average at the nominal 0vu point indicated below on the PPM
meters. By default, the PPM METERS on the front of the codec, on the TOUCH SCREEN, or in the
HTML5 Toolbox Web-GUI, use dBFS to express nominal operating, headroom and noise floor levels.
The codec can also automatically adapt to different Tieline reference scales. A Tieline codec with
proprietary Tieline session data enabled will automatically adjust the reference level to suit G5 and
G3 codecs, or Report-IT. When connecting to a non-Tieline codec, or a Tieline codec without
session data enabled, the codec will use the Tieline G5 reference scale setting.
The default Tieline G5 audio reference scale displayed on the PPMs is -38dBFS to 0dBFS (e.g.
Merlin, Genie, Bridge-IT and ViA codec families). Using this reference scale audio peaks can safely
reach 0dBFS without clipping, providing 18dB of headroom from the nominal 0vu point.
The audio reference level settings in the codec are:
Reference
Setting
1 Tieline G5
2 Tieline G3
Description
PPM meter low point
Nominal 0vu reference level
Level at which audio will clip/distort
PPM meter low point
Nominal 0vu reference level
Level at which audio will clip/distort
dBFS dBu
Equivalent
-38dBFS -16dBu
-18dBFS +4dBu
0dBFS +22dBu
-29dBFS -11dBu
-14dBFS +4dBu
0dBFS +18dBu
© Tieline Pty. Ltd. 2017