Constellation® January 2006
2-2 Frequency Planning
1+1 Intermodulation Products for Multiple HS or
NP Radios with Common Antenna Feedline
For single antenna configurations, to avoid creation of intermodulation
conversion products in the ferrite devices which can cause threshold
degradation in a local receiver, the following rule must be observed.
The intermodulation frequency products that result from combining two or
more transmitter frequencies on a common antenna feeder must be 48 MHz or
more above or below each of the receiver frequencies on that antenna feeder.
Note that all possible combinations must be taken into account (for example,
2A-B, 2B-D, A+B-C, C+D-B, and so forth).
Frequency Bands
Constellation radios are available in 6, 7, 8, 10, and 11 GHz frequency bands.
The following tables show the frequency bands for the various countries.
Table 2-2: Frequency band, Canada
Frequency Band
(MHz)
Channel
Bandwidth
(MHz)
In Compliance
with Industry
Canada
5850 to 5915 3.5
5.25
10
GL-34
a
a. These systems are not included in SP 305.8. Refer to
GL-34 for details.
5915 to 6425 29.65 SRSP-305.9
6425 to 6930 10
30
SRSP-306.4
7125 to 7725 3.75
5
10
30
RSP-307.1
7725 to 8275 10
30
SRSP-307.7
10550 to 10680 3.75
5
SRSP-310.5
10700 to 11700
b
b. 11,650 to 11,700 MHz is on reserve in Canada.
40 SRSP-310.7
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