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Reference
764 Digital Audio Monitor User Manual
53
The De-emphasis Submenu
The De-emphasis submenu, shown in Table 3, lets you select the
appropriate de-emphasis for each of the four input channels. Enter
the De-emphasis submenu from the TOP menu level by scrolling the
highlight to the De-emphasis item and pressing a soft button. Then
scroll the highlight to the desired channel. The four submenu items
are identical, except for the affected channel.
Table 3: De-emphasis submenu
Item
Choices
Factory setting
ÁÁÁÁÁÁÁ
ÁÁÁÁÁÁ Á
ÁÁÁÁÁÁ Á
ÁÁÁÁÁÁÁ
Channel #
(Where # = 1, 2, 3, or 4)
ÁÁÁÁÁÁÁ
ÁÁÁÁÁÁ Á
ÁÁÁÁÁÁ Á
ÁÁÁÁÁÁÁ
NONE
AUTO
CCITT J.17
50/15
ÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁ Á
Á
ÁÁÁÁÁÁ Á
ÁÁÁÁÁÁÁÁ
NONE
Selecting either CCITT J.17 or 50/15 will force that type of
de-emphasis. When AUTO is selected, the 764 will apply the
appropriate de-emphasis if either CCITT J.17 or 50/15 emphasis is
indicated in the channel status data of the digital input signal.
If you choose de-emphasis, please be aware that — although the 764
will continue to use raw input data when reporting MUTEs and
CLIPs — the level meters and session statistics will measure and
report levels in the de-emphasized signal. Because de-emphasis
attenuates the higher frequencies of a signal, selecting de-emphasis
may result in meter readings and true peak statistics that understate
the actual signal levels.
When any type of de-emphasis has been selected, it is indicated by a
“flag” on the display above the meter pair, as shown in Figure 34. In
the configuration pictured, de-emphasis has been selected for input
channels 1, 2, and 3 — but not for channel 4. (If de-emphasis was
also not selected for channel 3, the “De-emp” flag would not appear
above the right-hand meter pair.)
Summary of Contents for 070-8811-08
Page 9: ...Table of Contents vi 764 Digital Audio Monitor User Manual ...
Page 13: ...General Safety Summary x 764 Digital Audio Monitor User Manual ...
Page 57: ...Operating Basics 42 764 Digital Audio Monitor User Manual ...
Page 97: ...Appendix A Specifications 82 764 Digital Audio Monitor User Manual ...
Page 115: ...Appendix C Options 100 764 Digital Audio Monitor User Manual ...