Orban OPTIMOD-FM 8600S, Operating Manual

Page: 240 / 354

3-74
OPERATION ORBAN MODEL 8600S
The HD look-ahead limiter is not stereo-coupled. This prevents limiting
on one channel from causing audible modulation effects on the other
channel.
HD HF Shelf EQ (Pre/Post) determines whether the HD HF shelving equalizer will be
placed before or after the look-ahead limiter that feeds the HD output.
Diversity Delay (“In/Out”) determines if the composite output receives audio de-
layed with respect to the digital radio output. This control applies to both composite
outputs—you cannot delay one output without delaying the other.
You can turn the delay on or off for the various outputs via the 8600S’s API (page 2-
53), automation (page 2-39), and GPI remote interface (page 2-45).
Out Source allows you to determine if a given output (analog left/right, AES3 #1,
AES3 #2) emits the FM-processed signal (
FM
), the FM-processed signal with diversity
delay (
FM+D
ELAY
), the low-delay monitor signal (
M
ONITOR
;
for driving talent head-
phones) or the HD-processed signal (
HD
). This versatile control allows you to selec-
tively apply diversity delay to each output as desired.
Diversity Delay Trim allows you to trim the analog FM delay in intervals of one
sample of 64 kHz (15.6 µs) so that the delays of the analog-FM and digital radio
channels are matched at the receiver’s crossfade point. This prevents audible comb
filtering during crossfades. The setting of this control is critical to get best results
and you should adjust it to one-sample accuracy.
In PC Remote, drag the slider of the control with the mouse to set the delay coarsely,
use the Page Up and Page Down keys for intermediate increments, and use the
Section Label Control Name Values
Input/Output:Output1 Phone Src HD / Monitor / FM
Out Source (analog L/R) HD / Monitor / FM / FM+Delay
Input/Output:Output2 Out Source (AES 1) HD / Monitor / FM / FM+Delay
Out Source (AES 2) HD / Monitor / FM / FM+Delay
Input/Output:
Out Level 0… –20 dBFS; 0.1 dB steps
AES Output 1 and Samp Rate 32, 44.1, 48, 88.2, 96 kHz
AES Output 2 HD Bandwidth 15, 16, 17, 18, 19, 20 kHz
Word Leng 14 / 16 / 18 / 20 / 24 bits
Dither In / Out
Sync Internal / Sync In
Format AES3 / SPDIF
Out Level 0… –20 dBFS; 0.1 dB steps
Input/Output:
HD Digital Radio
Meter Select FMOutLevel / HD GR
HD HF Shelf EQ Pre / Post
Stereo/ Mono Stereo / MonoL / MonoR / MonoSum
Diversity Delay Trim 0.265 to 16.384 seconds
(HD) Polarity Positive / Negative
BS.1770
Safety Limiter
BS.1770 Loudness Control
Threshold
–31 to –11 LKFS/LUFS
BS.1770 Safety Limiter On / Off
Table 3-13: HD I/O Setup Controls