Orban OPTIMOD 6300 Operating Manual page 67

OPTIMOD 6300 DIGITAL
5. Set up Daylight Saving Time (Summer Time).
A) Turn the knob to specify the date at which Daylight Saving Time begins in
your area.
B) Press the N
EXT
C) Turn the knob to specify the date at which Daylight Saving Time ends in your
area.
6. Set the MAX LPF frequency as appropriate to your application.
[10.0 kHz] to [20.0 kHz]
The 6300's audio bandwidth can be set in three places: (1) in Setup, (2) in
the EQ page of the Modify screen, and (3) by remote control. The 6300's
bandwidth is always the lowest of these three settings. The frequency in
Setup is a technical parameter that determines the highest bandwidth
available. The installing engineer should set it to be congruent with the
sample rate of the digital system being driven by the 6300. For example,
if the 6300 is driving a system with a 32kHz sample rate, set the
to 15.0
. That way, a setting of 20 kHz elsewhere will not cause exces-
KHZ
sive bandwidth and aliasing because the 6300 will automatically override
MAX LPF
it with the
7. Set external AGC mode.
Most of the processing structures in the 6300 control level with a preliminary
AGC (Automatic Gain Control). If you are using a suitable Automatic Gain Con-
trol at the studio (such as an Orban 8200ST OPTIMOD-Studio or 464A Co-
Operator), the AGC in the 6300 should be defeated. This is so that the two AGCs
do not "fight" each other, and so they do not simultaneously increase gain, re-
sulting in increased noise.
A) Press the N
EXT
B) Set external AGC mode by turning the knob.
a) Set the field to Y
1101, 6300, 8200ST OPTIMOD-Studio, Orban 464A Co-Operator, or similar
AGC) installed at your studio feeding the studio-to-transmitter link. This
setting appropriately defeats the 6300's AGC for all presets.
b) Set the field to N
enables the 6300 AGC status to be determined by the selected preset.
If you are using an Orban 4000 Transmission Limiter, set field to N
that the AGC function in the 6300 continues to work). The Orban 4000 is
intended for transmission system overload protection; it is normally op-
erated below threshold. It is not designed to perform an AGC or gain-
riding function and it cannot substitute for the AGC function in the 6300.
8. Select your primary input (analog or digital).
A) Press the N
EXT
button.
setting.
button.
ES if you have an external AGC (such as an Orban 1100,
If you do not have a external AGC installed; this setting
O
button.
INSTALLATION
MAX LPF
O (so
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