To Monitor Dolby Based Surround Sound - Tektronix WFM8200 User Manual

To Monitor Dolby Based Surround Sound

To Configure Dolby Inputs
WFM8200 and WFM8300 Waveform Monitors
If your instrument has Dolby monitoring capabilities (Option DPE), it can decode
and monitor audio signals that are based on Dolby digital surround sound formats.
These formats are Dolby D (AC-3 ) compression (designed for distribution) and/or
Dolby E compression (designed for production). You can specify and configure
the Dolby input sources, measure signal levels and monitor phase between Dolby
components, and display these relations in the Audio display.
NOTE.
For a list of the options that are installed on your instrument, press the
CONFIG button. In the configuration menu, select the Utilities submenu. The
View Instrument Options entry lists the options installed on your instrument.
Like other inputs, the Dolby inputs that you select and monitor from the Audio
display might need to be configured before you use them. They are initially set
to factory defaults, which you can restore by pressing the FACTORY button on
the instrument front-panel. The first procedure in this section helps you configure
these inputs. After you have completed that procedure, check that the alarms are
configured as you want them. Your setup here determines, in part, the Dolby
audio-signal characteristics displayed.
To Set Up Dolby Input Parameters:
1. Select Audio Inputs/Outputs from the CONFIG menu.
2. Select the Dolby input that you want to configure (one of Dolby 1 - Dolby 4).
The Dolby parameters for the selected Dolby input are now displayed; select
each parameter in turn and set up as described in the following steps.
3. Select Dolby Source and choose the embedded or AES input signal pair as
the signal source to be decoded for the Dolby input selected in step 2.
4. Select Format Expected and choose the format condition that, when missing,
triggers the Dolby Format Alarm.
NOTE.
The instrument auto-selects and decodes the Dolby Format.
5. Select Analog Output Map and specify which inputs (if any) are routed to
the analog outputs in the map that appears.
6. Select the AES B Output Map and assign specific bar pairs to the AES B
outputs in the map that appears. (The AES B bank must be configured as
outputs.)
NOTE.
When a Dolby input is active, channel labels (L, R, Ls, and so on) appear
in addition to the channel numbers.
Audio Monitoring
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