Part 19 Ppm Meters And Analog Audio Outputs - Codec Tieline ViA User Manual

19 PPM Meters and Analog Audio Outputs
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. For
more information on reference scales see
Important Notes:
· The PPM examples which follow are based on default program routing of inputs to
encoders and return audio to decoders. To learn more about adjusting encoder and
decoder routing see
· The LEFT and Right PPM METERS reflect default program encoder settings, excluding
playback audio, at all times. Please use the software PPMs on the TOUCH SCREEN if
default routing of inputs to encoders is adjusted using the Matrix Editor.
Setting Levels with PPM Meters
The INPUT PPM METERS surrounding the INPUT GAIN rotary encoders, and the PPM meters on
the TOUCH SCREEN, use the dBFS audio scale. Set levels so that audio peaks average around the
first ORANGE LED.
When adjusting input levels, a GREEN or ORANGE LED surrounding each INPUT GAIN rotary
encoder displays the amount of gain wound into the input. This disappears after a few seconds if
audio is present and normal PPM metering resumes.
Set mixed audio levels so that audio peaks average around the first ORANGE LED on the LEFT,
RIGHT and RETURN PPMs on the front of the codec, or the PPM meters on the Connections
screen. This represents nominal 0 VU at -18dBFS (+4dBU). Audio peaks can safely reach 0dBFS
(+22 dBu) without clipping, providing 18dB of headroom.
© Tieline Research Pty. Ltd. 2020
General Audio
Using the Matrix Editor.
ViA User Manual v3
Settings.
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