Harris HMX6803+ - Audio Processing and Embedding

HMX6803+ and OP+HMX+ Installation and Operation Manual 27
Copyright © 2009, Harris Corporation
Chapter 3: Operation
Audio Test Tones
Table 3-1 describes the frequency and levels of each audio output test tone,
available as a selection from each of the Output Ch (1–16) Source Select and
Audio Procamp AES (1A-8B) Out Source parameters (see
page 57).
Audio Embedding Modes
The audio embedder component in the HMX6803+ and OP+HMX+ is
composed of several smaller subcomponent blocks:
• One ancillary data stripper (ADS)
• Four audio embedding subcomponents
The first subcomponent is an ancillary data stripper (ADS). This block removes
all ancillary data packets in the input SDI stream, prior to embedding.
Following the ADS block are four separate audio-embedding subcomponents.
Each subcomponent has the ability to operate on only one audio group, either
appending or overwriting a predetermined group onto the SDI stream.
The audio embedding modes are Audio Group (1–4) Embedding Mode
parameters (see
page 51). Table 3-2 briefly describes the Off, Append,
OverWrt, and Auto options available from each of the embedding modes.
Table 3-1. Audio Test Tones
Test Tone Frequency Level
Test Tone 1 400 Hz -18 dBFS
Test Tone 2 1 kHz -18 dBFS
Test Tone 3 2 kHz -18 dBFS
Test Tone 4 4 kHz -18 dBFS
EBU R68 1 kHz -18.06 dBFS
SMPTE RP155 1 kHz -20 dBFS
Table 3-2. Embedding Mode Options
Options Description
Off Deactivates embedding of the selected audio group
Append Attempts to insert the audio data and control packets
immediately following the last existing audio data/control
packet in the horizontal ancillary region (see
“Append
Embedding” on page 28)
OverWrt Attempts to overwrite existing audio data and control
packets of the same group number with the new audio data
(see
“Overwrite Embedding” on page 30)