STEL-1209/CE Intel, STEL-1209/CE Datasheet - Page 15

• Manufacturer Part Number: STEL-1209/CE
• Description: BPSK/QPSK/16 QAM Burst Modulator Assembly
• Manufacturer: Intel

FILTERS SCREEN
The STEL-1109 provides a total of 32 taps for the FIR
filter coefficients.
provided calls for a symmetrical number of taps; thus,
one only needs to enter the FIR coefficients 16 times.
FIR AND INTERPOLATION FILTER
FIR Filter Bypass
This button allows the user data to bypass FIR filter
processing. A useful feature in testing.
FIR Filter Shape
This GUI provides two commonly used FIR filter
shapes for evaluation; Raised Cosine and Root Raised
Cosine.
The user has further flexibility to provide
The FIR filter architecture as
15
their own FIR filter shape by choosing the custom
button.
FIR Bandwidth
Allow user to program the FIR filter with 'alpha' in the
range of 0 to 1. With each value entered, a new set of
FIR Filter coefficients is calculated and displayed.
FIR Scaling
The calculated coefficients can be scaled down by
entering a value from 1 to 0.
saturation of accumulators (internal to the STEL-1109) if
a specific FIR Bandwidth is required (fixed), and the
user wants to get as much power as possible from the
IF output of the STEL-1209.
This can avert the
STEL-1209