FreeWave Technologies Inc. 1521131FFF 사용자 설명서
Spread Spectrum Wireless Data Transceiver User Manual
LUM0002AG Rev A
Version 7.0
29
(3)
900MH
Z
F
REQUENCY
Z
ONE
–
T
HIS SETTING ONLY NEEDS TO BE SET ON THE
M
ASTER RADIO
Frequency Zone: The idea of frequency zoning is to divide the available band (902MHz to 928 MHz) into
smaller bands, in this case 16 smaller bands each consisting of 5, 7, and 8 Frequency channels depending
on the frequency zone. These 16 Zones are stored in a Word, which is made up of 16 bits numbered 0-15.
These bits when displayed LSB to MSB directly represent the zones that the radio will operate on from
lowest frequency to highest. A value of ‘1’ in the bit sequence will instruct the radio to operate within the
represented band. Likewise, a ‘0’ value will instruct the radio to bypass the represented band. This feature
should only be used with the standard hop table.
smaller bands, in this case 16 smaller bands each consisting of 5, 7, and 8 Frequency channels depending
on the frequency zone. These 16 Zones are stored in a Word, which is made up of 16 bits numbered 0-15.
These bits when displayed LSB to MSB directly represent the zones that the radio will operate on from
lowest frequency to highest. A value of ‘1’ in the bit sequence will instruct the radio to operate within the
represented band. Likewise, a ‘0’ value will instruct the radio to bypass the represented band. This feature
should only be used with the standard hop table.
Note: The Hop Table Version must be set to 0 when using Frequency Zones. If another Hop Table
Version were to be selected, the limitations of that selection would be applied to the hopping
pattern as well. For example, if Hop Table Version 3 were selected, only the middle of the band
would be available in the pattern. Then, if Frequency Zones 5, 6, 7, 8 and 9 were set to 0 no
allowable frequencies would be available for the radio to use.
pattern as well. For example, if Hop Table Version 3 were selected, only the middle of the band
would be available in the pattern. Then, if Frequency Zones 5, 6, 7, 8 and 9 were set to 0 no
allowable frequencies would be available for the radio to use.
Binary Zone Number (LSB First)
Beginning Freq. (MHz)
Ending Freq. (MHz)
Number Of Channels
0 902.2464
903.8592
8
1 904.0896
905.4720
7
2 905.7024
907.0848
7
3 907.3152
908.6976
7
4 908.9280
910.3104
7
5 910.5408
911.9232
7
6 912.1536
913.5360
7
7 913.7664
915.1488
7
8 915.3792
916.7616
7
9 916.9920
918.6048
8
10 918.8352
920.2176
7
11 920.4480
921.8304
7
12 922.0608
923.4432
7
13 923.6736
925.0560
7
14 925.2864
926.6688
7
15 926.8992
927.8208
5
Frequency Zones are activated through the Setup menu. To enable zoning from the main Setup menu of
the radio:
the radio:
1. Select Menu 3 “Edit Radio Transmission Characteristics”
2. Select Option 0 “FreqKey”
3. Select F “For More”
4. Select Option 3 “Frequency Zone”
Enter 1 to enable desired frequency zone and a 0 to disable desired frequency zone. Frequency Zone
entries begin with 0 (LSB) and continue through 15 (MSB).
entries begin with 0 (LSB) and continue through 15 (MSB).