Orban OPTIMOD-FM 8700, Operating Manual

Page: 251 / 390

OPTIMOD-FM DIGITAL OPERATION
3-81
follows the sample rate present at the selected input, regardless of the
setting of the output sample rate selector.
If no signal is provided to the 8700i Input or
S
YNC
I
N
, set
SR S
YNC
to
I
NTERNAL
and select the desired output sample rate.
Format determines if the digital-channel output channel status bits follow the pro-
fessional AES3 or consumer SPDIF standard.
We expect that AES will be appropriate for almost all users, but some
consumer sound cards may require SPDIF.
BS.1770 Safety Limiter ON/OFF activates or defeats the BS.1770 Safety Limiter, which
is applied only to the digital radio processing. This control affects the behavior of
the digital output receiving the HD feed (see step 10 on page 2-32).
BS.1770 Loudness Control Threshold sets the threshold of the BS.1770 Safety
Limiter and the calibration of the BS.1770 loudness meter.
When the BS.1770 Safety Limiter is OFF, the BS.1770 L
OUDNESS
C
ONTROL
T
HRESHOLD
sets the calibration of the BS.1770 Loudness Meter, such that
“0” LK/LU on the meter corresponds to the loudness appearing at the
Digital Output assigned to “HD.” This calibration is only correct if the
Digital Output
100% P
EAK
L
EVEL
control is set to 0 dBFS.
When the BS.1770 Safety Limiter is ON , this calibration is correct regard-
less of the setting of the Digital Output 100% P
EAK
L
EVEL
control.
Unique HD Audio Controls
Included with each preset in the “HD Limiting” page in Advanced Control. The only
HD controls described in this section and shown in Table 3-14 have no FM analog
counterparts. There are many other HD controls that have analog FM counterparts.
These are described in earlier parts of Section 3 in this manual.
FM

HD Control Coupling determines if audio controls affecting the HD equalizer
and HD multiband limiter will track their counterparts in the FM analog processing
chain or if the HD and FM controls can be adjusted separately. Each preset contains
its own setting for this control, so some presets may be coupled while others are in-
dependent. The
FM

HD mode causes almost all HD controls to track the settings of
their FM counterparts. Only the controls in the HD L
IMITING
page are adjustable sepa-
Function Control Name Values
HF Shelving Filter HD EQ Gain
0…–6 dB; 0.5 dB steps
HD EQ Freq
2…– 20 kHz; 1/6-octave steps
Look-Ahead Limiter HD Limiter Drive
0…+12 dB; 1.0 dB steps
HD De-Esser
HD De-Ess Off,
–23.5…0
FM

HD Control Coupling FM

HD Control Coupling FM

HD; Independent
Bass Clipper HD Bass Clip Threshold
–6.0 … 0.00
HD Speech Bass Clip Thr
–6.0 … 0.00
Bass Clip Shape
0 … 10
Table 3-14: Unique HD Audio Controls (found in HD Limiting page)