Orban OPTIMOD 6300 Operating Manual page 145

OPTIMOD 6300 DIGITAL
 the gain reduction of the Multiband output channel's look-ahead lim-
iters in units of dB;
 the action of the High Frequency Enhancer and Stereo Enhancer proc-
essing, in arbitrary units.
Newer 6300s have redesigned front-panel graphics that do not show
scales for the Enhancers. (These graphics were replaced scales for the
Loudness Meter and Loudness Gain Reduction.) The High Frequency En-
hancer displays on the left; the Stereo Enhancer on the right.
 The loudness controller gain reduction and loudness level.
When the 6300 is in dual-mono mode and is displaying the loudness GR and
level meters, you can use S
played.
L
OUDNESS
ured by the ITU. BS.1770-2 algorithm using a 10-second integration interval
with gating. The meter is calibrated with reference to the active Dolby
Digital® D
D
IALNORM
of D
IALNORM
to –24 dB, then "0 LK" on the Loudness Level meter corresponds to –24
LKFS and –24 LUFS (See step (B) on page 2-30.)
L
OUDNESS
by the CBS Loudness Controller and BS.1170 Safety Limiter. For the 6300's
"TV xxxx" factory presets, this meter will typically indicate 1 to 3 dB of gain
reduction on dialog.
PC Remote has a dual-color meter showing the contribution of the BS.1770
limiter in cyan and the CBS Loudness Controller in dark blue. These two
readings are stacked so that the total loudness controller gain reduction is
indicated by the end of the dark blue bar.
If you adjust the processing so that the Loudness Level meter peaks at 0
dB on dialog and you set up your Dolby Digital encoder so that that you
are transmitting this same Dialnorm value to consumer receivers, your
transmission will have the correct loudness compared to other correctly
set up transmission channels.
All of the 6300's "TV xxxx" factory presets will automatically produce the
correct loudness if the 6300's Dialnorm value matches the Dialnorm value
you are transmitting to consumer receivers.
6300 PC Remote shows the BS.1770-2 meter and also shows short-term
loudness (200 ms integration time) as measured by the 1981 Jones &
Torick CBS Technology Center algorithm. (See page 1-22 for a discussion
of the J&T algorithm and Using the ITU BS.1770 and CBS Loudness Meters
to Measure Loudness Controller Performance on page 3-79.)
ETUP
L
meter shows the subjective loudness of the output, meas-
EVEL
IALNORM value that you specify in I/O Setup if the value of
in the active processing preset is G
in the active processing preset. For example, if D
G R
AIN EDUCTION shows the sum of the gain reductions produced
/M M
ETER ODE to choose which channel is dis-
. Otherwise, it the value
LOBAL
OPERATION
IALNORM is set
3-3