EVB71122_15 Datasheet, PDF (11/31 Pages) Melexis Microelectronic Systems – 300 to 930MHz Receiver Evaluation Board Description

EVB71122
300 to 930MHz Receiver
Evaluation Board Description
2.2.4 Counter Settings in ABC Mode – 8+1 Preconfigured Channels
In ABC mode (SPISEL=0), the counter settings are hard-wired. In below table all frequency units are in MHz.
CH
Inj
f_RF
f_IF1
f_LO1
N_tot
N
P
A
f_PFD
R
f_REF
f_LO2
f_IF2
1
h-l 369.5 125.8 495.3 3715 116 32
3 0.133 75 10 123.8 2
2
h-l 371.1 126.4 497.5 3731 116 32 19 0.133 75 10 124.4 2
3
h-l 375.3 127.8 503.1 3773 117 32 29 0.133 75 10 125.8 2
4
h-l 376.9 128.3 505.2 3789 118 32 13 0.133 75 10 126.3 2
5
h-l 384.0 130.7 514.7 3860 120 32 20 0.133 75 10 128.7 2
6
h-l 388.3 132.1 520.4 3903 121 32 31 0.133 75 10 130.1 2
7
h-l 391.5 133.2 524.7 3935 122 32 31 0.133 75 10 131.2 2
8
h-l 394.3 134.1 528.4 3963 123 32 27 0.133 75 10 132.1 2
9
h-l 395.9 134.6 530.5 3979 124 32 11 0.133 75 10 132.6 2
A
f _FB
floor (x)
f _PFD
f _RO
R
 f_R
f _RO
f _VCO
N_tot  N  P  A
N
N _LO2
P
R
List of Mathematical Acronyms
divider ratio of the swallow counter (part of feedback divider)
frequency at the feedback divider output
The floor function gives the largest integer less than or equal to x.
For example, floor(5.4) gives 5, floor(-6.3) gives -7.
PFD frequency in locked state
reference frequency of the PLL
frequency of the crystal reference oscillator
frequency of the VCO (equals the LO1 signal of the first mixer)
total divider ratio of the PLL feedback path
divider ratio of the program counter (part of feedback divider)
LO2DIV divider ratio, to derive the LO2 signal from LO1 (N₁ = 4 or 8)
divider ratio of the prescaler (part of feedback divider)
divider ratio of the reference divider R
39012 71122 01
Rev. 005
Page 11 of 31
EVB Description
Nov/15