Atmel ATR4262M1 Portable Radio User Manual


 
7
4994BS–AUDR–05/08
ATR4262M1 [Preliminary]
7. VCO and AM Prescaler Settings
Table 7-1 gives an example of the VCO divider and AM Prescaler settings and the reception
frequencies.
A small VCO frequency range of e.g., 195.3 MHz to 237.9 MHz allows reception of the most
important bands like FM, JPN, LW, MW, 49m, 41m, and 31m.
8. Power Supply
There is only one power supply voltage (8V to 10V) necessary for operation of the ATR4262M1.
Table 7-1. Typical VCO Divider, AM Prescaler Settings, and Reception Frequencies
Band
VCO-
divider
(D
FM
)
N-div.
Prescaler
(D
PLL
) IF [MHz]
Min. Reception
Frequency [MHz]
Max. Reception
Frequency [MHz]
Min. VCO
Frequency
Max. VCO
Frequency
AM-
Prescaler
(D
AM
)
FM 2 2 +10.7 87.5 108 196.4 237.4 -
JPN 3 3 –10.7 76 90 195.9 237.9 -
WB 1 2 +10.7 162.4 162.55 173.1 173.25 -
OIRT 3 3 +10.7 65.8 74 229.5 254.1 -
OIRT 3 3 –10.7 65.8 74 165.3 189.9 -
LW/MW - 2 +10.7 0.15 1.605 217 246.1 10
LW/MW - 2 +10.7 0.15 1.605 195.3 221.49 9
120m - 2 +10.7 2.3 2.5 208 211.2 8
...
49m - 2 +10.7 5.95 6.2 199.8 202.8 6
41m - 2 +10.7 7.1 7.35 213.6 216.6 6
31m - 2 +10.7 9.5 9.9 202 206 5
...
15m - 2 +10.7 21.45 21.85 192.9 195.3 3