Operating instructions

GUIDE TO INSTALLATION AND OPERATION
20 | FRS-1801
The Active Format Descriptor (AFD) flag is used to identify the aspect ratio and protected areas of a video
signal. The AFD flag is implemented differently in SD and HD:
• In HD, the AFD flag is sent in an ancillary packet, normally found on line 11 in the vertical ancillary space.
• In SD, the AFD flag is sent as a VLI signal (RP 186) for 525 and 625 formats, as a WSS signal (ITU-R
BT.1119-2) for PAL only, and as an AFD packet (SMPTE 2016).
The AFD flags inserted and detected act only as information for the user and no aspect ratio processing is
made by the FRS-1801.
3.4.6 The Audio Processing panel
The Audio Processing panel provides full audio
processing and delay parameters for the input
embedded or discrete audio channels. These
parameters affect both the output audio channels
(embedded and AES) and the audio channels sent
to the DAP or UAP companion cards.
Group Detected sub-section
Status indicators turn green when audio groups 1,
2, 3 or 4 are detected.
Discrete AES Detected sub-section
Signal presence indicators monitor the presence of
AES inputs. The indicators turn green when AES
input signals are detected. The signal presence
warning color can be configured by the user in the
Alarm Config panel (Sect. 3.4.16)
Signal Presence sub-section
Signal presence indicators monitors the audio
channels presence and are related to the Silence
parameters defined in the Ch XX/Silence tab (see
details below): the indicator is green when an
active signal is present and configurable when a
silence is detected according to the “no signal” threshold and the channel detection warning. The signal
presence warning color can be configured by the user in the Alarm Config panel (Sect. 3.4.16)
CH 1-4, CH 5-8, CH 9-12 and CH 13-16 Tabs
Each of these tabs controls Levels, Fixed Delays and Silence detection for four audio channels; each
channel is provided with a set of controls.
Levels sub-tab: grouped by pair of channels, each channel has the following controls:
Level (slider and input box): Sets the audio gain from -96 to 12 dB in 0.5 dB steps. For non-PCM
audio, the level value is overridden to 0 dB.
Mute (speaker button): Mutes the selected audio channel
Phase Invert: When checked, inverts the selected audio channel phase.
Lock: “Locks” both channel sliders together for levels and delay (coarse only), so that moving one
slider moves the other one as well.
F
igure 3.1
6
Audio Processing – CH 1-4 levels tab