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PAM2-3G16
User Handbook Issue 4
2.2.4
Dolby E Timing and Rate Information
The
Data Screen
of the
PAM2-3G16
displays extended information about any
Dolby E
and
Dolby
Digital
sources. This shows the frame rate of the Dolby encoded signal and its timing relative to a
video source where available.
For AES inputs, the frame rate information is displayed as a minimum;
Dolby E 20bit 29.97
- or -
Dolby E 16bit 25Hz
For embedded Dolby E sources, the start line position is displayed in the format;
Dolby E 16bit L11
This functionality is also extended to mixed sources. If an AES source is selected for monitoring,
whilst a video source is selected with the same frame rate, then the display will give the approximate
line position of the AES
Dolby E
start relative to the video. This allows the timing of an AES signal to
be checked either before embedding or after extraction (note the embedder / extractor delays need to
be accounted for in a system). For sources of different frame rates, the display reverts to the
Dolby E
frame rate. The video frame rate is already displayed on the top level menu.
Dolby Digital
and Digital Plus
sources are also identified, although no further information is provided
without a decoder.
All of the above functions are available both with and without on-board
Dolb
y decoding, providing the
source has a correctly formatted
SMPTE 337M
header
2.2.5
Dim Cut Control
The rotary volume control of
PAM2-3G16
also features a push switch cut/dim function. Push the
volume control once to cut the volume to internal speakers, headphones and variable audio outputs.
Pushing the volume control a second time will dim the output level by 12 dB. A final push will return
the output volume to full level
– this is indicated by a single LED dot cursor in cut and dim conditions.
2.2.6
LED Brightness Settings
The
Setup 2 Menu
contains a button to select the operational brightness of the switch and encoder
LEDs. By selecting and rotating the encoder the overall brightness of the LEDs may be changed from
low to high level across 5 graduations. 1 is low, 5 is high.
