WGCE5037 Intel, WGCE5037 Datasheet - Page 17

• Manufacturer Part Number: WGCE5037
• Manufacturer: Intel

Specifications of WGCE5037

• Lead Free Status / Rohs Status: Supplier Unconfirmed

3.3
The bandwidth of the baseband filter is given by the following expression:
where:
fbw
fxtal
BR
BF
The above equation can be re-arranged as follows
It is recommended that BR should be set so that
This sets the bandwidth resolution to approximately 200kHz
The value of BF can now be calculated from Equation 2 and rounded to the nearest integer:
Example
Conditions: fxtal = 10.111 MHz, fbw = 26.5 MHz
Choose BR = 10
BF = 132
The actual filter bandwidth is therefore given by:
fbw
BF
Integrated Phase Noise LO = 1500MHz
Integrated Phase Noise LO = 2150MHz
Integrated Phase Noise LO = 950MHz
=
=
Baseband Filter Bandwidth Calculation
Quadrature Amplitude Matching
10.111
26.5
=
=
=
=
Quadrature Phase Matching
10
fbw
x
10.111
the filter bandwidth in MHz within the range 8 MHz to 43 MHz.
crystal oscillator frequency in MHz.
decimal value of the bits BR[4:0], range 1-31.
(BR = 0 is not allowed)
decimal value of the register bits BF[7:0], range 0 - 255.
=
5.088
BF
x
(
BR
132
Table 24 - Typical Performance for DVB-S2 Applications
=
Parameter



fxtal
x
x
fbw x
+
5.088
10
1
)
x
−
5.088
1
5.088
x
=
1
132.35
(
BF
x
=
+
fxtal
26
1
BR
)
.
43



Equation 1
−
MHz
1
Equation 2
0.40 °rms
0.62 °rms
0.83 °rms
< 0.5 dB
Intel Corporation
Value
fxtal
BR
< 2 °
CE5037
17
is approximately 1 MHz
PLL Loop Bandwidth = 10kHz
Filter bandwidth = 26.5 MHz
Phase noise integrated over
1kHz to 10 MHz
Notes
Data Sheet