User Guide

NEM-2
System Module and User Interface CCS Technical Documentation
Page 52 Copyright Nokia. All rights reserved. Issue 1 07/03
RF Frequency Plan
RF frequency plan is shown below. The VCO operates at the channel frequency multiplied
by two or four depending on the frequency band of operation. This means that the base-
band modulated signals are directly converted up to the transmission frequency and the
received RF signals directly down to the baseband frequency.
Figure 15: RF Frequency plan
f / 4 f / 2
f f
f / 4 f / 2
f f
L P F
3 2 9 6 -
3 9 8 0
M H z
P L L
2 6 M H z
T C X O
1 / 1
1 / 2
R X 8 5 0 : 8 6 9 - 8 9 4 M H z
R X 1 9 0 0 : 1 9 3 0 - 1 9 9 0 M H z
V C O
T X 1 9 0 0 : 1 8 5 0 - 1 9 1 0 M H z
T X 8 5 0 : 8 2 4 - 8 4 9 M H z
B B C L K
I - S i g n a l
Q - S i g n a l
I - S i g n a l
Q - S i g n a l
T X
R
X
H e l g o
.
.