User's Manual

Page 40
NewStream User Guide and Technical Manual
Frequency Selection
Block Up-converter Options
When using Block Up-converter Options, you are able to enter the frequency that you
want and the spectrum inversion properties of the Block Up-converter. The NewStream
tunes the L-Band modulator with the proper calculation. This allows you to enter the
LO [Local Oscillator] frequency of the Block Up-converter that you are using, and set
which type of LO injection is used by the BUC. Low side LO indicates a non-inverted
spectrum and High side LO, an inverted spectrum. See Satellite Frequency Tune Mode
- BUC Enabled - IDU Touchscreen Control, on the next page, for more infromation.
Refer to Frequency Tuning Example With BUC Enabled for detailed instructions.
You can also setup as many as 99 Channels that designate specifi c frequencies and
use the Channel Plan option [a.k.a Channel Tuning in remote control] to select them.
You must setup these channels via the Web interface. Refer to the Frequency Plans
Page [SNG] for more information.
Frequency 16x2 Character Display
In Satellite Channel Plan Mode, the two lines of the frequency display window [Figure 5
item E] will show
CH #
Frequency in MHz.
The frequency shown will always be the Frequency output of [BUC LO + L-Band IF if
Spectrum Non-Inverting Low Side] or [BUC LO – L-Band IF Spectrum Inverting High
Side]. If BUC LO is not entered, use L-Band IF frequency. In Frequency Tune Mode,
the two lines of the frequency display window [Figure 5 item E] will show Frequency
Tune Mode Frequency in MHz.
The frequency shown here is always the desired frequency output of the BUC. If the
Block Up-converter Local Oscillator is not entered, the output will be between 950 -1750
MHz.
Power Rocker Switch
The RF power level is displayed on the touchscreen, in the lower right corner. You
can press the RF Adjustment rocker switch up or down [Figure 5 item B] to increment
or decrement the power in .5dBm steps. Exact levels can be entered by pressing
the Power button on the 5” touchscreen display. The rocker will always move to the
nearest 0.5dB, even if the last number was set to an in-between power level.
Example: If you set the power to 0.2dBm on the touchscreen, then press the rocker
up button, the power will show 0.5dBm. Likewise, if the power reads 0.2dBm and you
press the rocker down button, this will read 0.0 dBm.
The L-Band power ranges from -40.0d B to +5.0 dB in 0.1dB increments. The power
level will always return to the last used power level. A typical application is to set the
L-Band power to the correct level [-12dB is typical] to satisfy the satellite amplifi er’s
input and the control power to the satellite using the amplifi ers control panel.