Optimod-AM 9400 V1.2 Operating Manual - Orban
Optimod-AM 9400 V1.2 Operating Manual - Orban
Optimod-AM 9400 V1.2 Operating Manual - Orban
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2-26<br />
INSTALLATION ORBAN MODEL <strong>9400</strong><br />
6. Adjust the Digital Input Reference Level and Right Balance controls.<br />
[Skip this step if you will not be using the digital input.]<br />
A) Navigate to SETUP > IO CALIB > INPUT > DIG IN and set the input source to Digital.<br />
B) Repeat steps 3 through 5 (starting on page 2-23), but use the DI REF (VU OR<br />
PPM) and R CH BAL controls for the digital section.<br />
7. Set output bandwidth and highpass filter cutoff frequency.<br />
A) Navigate to SETUP > MODIFY TR PRESET > TX1/DAY .<br />
To describe their most common application, the four transmission presets<br />
are labeled TX1/DAY, TX1/NIGHT, TX2/DAY, and TX2/NIGHT, although<br />
they can be applied in a completely general way to the requirements of<br />
your transmission facility. Transmission Presets can be recalled by remote<br />
control (GPI or PC Remote) and/or at preset times by the <strong>9400</strong>’s clockbased<br />
automation. TX1/DAY is the default transmission preset and many<br />
stations will always use it once they have set it up.<br />
The controls within a given transmission preset include lowpass filter<br />
cutoff frequency, lowpass filter shape, highpass filter cutoff frequency,<br />
positive peak threshold (asymmetry), and six transmitter equalizer controls.<br />
Only one transmission preset can be active at a given time; that preset<br />
determines the parameters applied to all analog <strong>AM</strong> processed outputs.<br />
Transmission Presets do not affect any output emitting the HD-processed<br />
signal.<br />
Once you have selected a transmission preset, that preset will be active<br />
until you explicitly select another via the front panel, remote control, or<br />
clock-based automation. This is true even if AC power is interrupted.<br />
However, if clock-based automation was scheduled to recall a different<br />
preset during the period when the <strong>9400</strong> was powered down, upon<br />
power-up the <strong>9400</strong> will automatically recall the preset that would have<br />
been on-air at that time if power had stayed on.<br />
B) Hold down the soft key under LOWPASS and Select the desired lowpass filter<br />
cutoff frequency by turning the knob.<br />
Lowpass filter cutoff frequencies range from 4.5 kHz to 9.5 kHz (NRSC) in<br />
0.5 kHz steps. The setting of the lowpass filter controls your RF occupied<br />
bandwidth, so it is very important to set it to meet the government standards<br />
in your country.<br />
Note that the user processing presets can only lower the low-pass cutoff<br />
frequency below its setting in active transmission preset. If, in the EQ section<br />
of the processing preset, you exceed the lowpass cutoff frequency of<br />
the TX preset, the TX preset setting will always determine the actual cutoff<br />
frequency of the processor. For example, if you have set the low-pass<br />
cutoff frequency in the active transmission preset to 6.5 kHz, this can be<br />
lowered to 6.0 kHz or below in a processing preset, but not raised above<br />
6.5 kHz. This is to prevent accidentally creating presets that violate the<br />
occupied bandwidth standards of your governing authority.