User's Manual

Page 44
AirStream User Guide and Technical Manual
Frequency Tuning Example With BUC Enabled
If the BUC Spectrum Non-Inverting LO Type is Low side, the sum of the NewStream
frequency output IF and BUC is equal to:
LO + [L-Band IF from NewStream] = Frequency display
If the BUC LO Type is High Side is Spectrum Inverting, the difference between the
frequency output IF and BUC is equal to:
LO – [L-Band IF from NewStream ] = Frequency display
As the name implies, Spectrum Non-Low Side LO type Inverting does not invert the
Satellite Modulation however, Spectrum Inverting High Side Local Oscillator Type does
invert the spectrum. If a Spectrum Inverting Low Side Block Up-converter is selected,
the NewStream automatically toggles the spectrum inversion from the selection in the
preset. You are not shown this inversion, as the Spectral inversion in the preset refl ects
your selection. This allows the same set of presets to be used regardless of whether a
Low side or High Side Block Up-converter is used.
Example:
In KU Satellite operation, a fi xed-spectrum Low Side LO Type non-inverting
[BUC] Block Up-converter frequency @ 13,050 MHz is used.
The KU range is 14,000 - 14,800MHz.
Front Panel State
Enter 13.050 MHz into BUC frequency fi eld and select Spectrum Non-Inverting Low
Side LO Type.
• Desired frequency = 14000 MHz // 13050 MHz + 950 MHz = 14000 MHz // the
L-Band IF tunes to [950MHz] =950MHz
• Desired frequency =14275 MHz // 13050 MHz + 1255 MHz = 14250 MHz // the
L-Band IF tunes to 1255 MHz
SNG Status
The Satellite Status touchscreens consist of four information displays for the current
SNG preset. Each of the pages can be viewed using a swiping motion. The scroll bar at
the bottom of the Status touchscreens indicates the relative position of each screen. For
further information about the listed settings, refer to the Status Web interface section.
Refer above to Figures 14 through 17 for examples of the listed information for SNG
mode.