Exhibit 1 Interference study

0105-EX-ST-2005 Text Documents

Raysat Inc.

2005-02-25ELS_69448

Raysat, Inc. Special Temporary Authority Request

Exhibit 1 - Adjacent Satellite Interference Analysis

The effective main beam gain of this antenna is 26.2 dBi. The off-axis gain at angles up
to +/-8 degrees is shown in the attached figures. The maximum RF power to be used by
the system is -14 dBW/4 kHz. The following chart shows the off-axis gain, power, and
EIRP and compares them to the FCC Part 25 limits. As can be seen for all off-axis
angles to 6 degrees the Raysat system will be compliant with FCC Part 25 antenna
sidelobe and off-axis EIRP emissions.

Data in support of claim that proposed operation meets off-axis criteria of 1986 Declaratory Order
ID Applicant: RaySat Date of Application: 02/24/05
HEADING
a1 Antenna Manufacturer: RaySat c main bore gain 26.20 dBi
a2 Antenna Model: 2.4m d frequency at which gain was measured 14.25 GHz
a3 Antenna ID: RaySat e maximum input power density (dBw/4KHz) -14.00 dBw/4Khz
b Transmit band (b): 14250.00

1.0 to 7 degrees calculated maximum difference in off-axis eirp density: -1.69 dBw/4Khz
TABLE 1.0 to 180 degrees calculated maximum difference in off-axis eirp density: -1.69
EIRP for Antenna Conforming Gain and EIRP for Antenna Not Conforming to 25.209(a)
to 25.209(a) operating at 25.212 operating at stated maximum power density
power density limits
1 2 3 4 5 6 7
Angle 25.209 Gain Off-Axis EIRP Gain relative Actual Off-Axis EIRP Difference
(degrees) (dBi) Density for to main bore Gain Density for in Off-Axis
-14.00 gain (dB) in dBi input of EIRP Density
dBw/4Kz -14.00 (6) minus (3)
1.00 29.00 15.00 -4.24 21.96 7.96 -7.04
1.25 26.58 12.58 -7.60 18.60 4.60 -7.98
1.50 24.60 10.60 -11.30 14.90 0.90 -9.70
1.75 22.92 8.92 -14.80 11.40 -2.60 -11.52
2.00 21.47 7.47 -24.20 2.00 -12.00 -19.47
2.25 20.20 6.20 -18.70 7.50 -6.50 -12.70
2.50 19.05 5.05 -14.60 11.60 -2.40 -7.45
2.75 18.02 4.02 -12.50 13.70 -0.30 -4.32
3.00 17.07 3.07 -12.40 13.80 -0.20 -3.27
3.25 16.20 2.20 -13.20 13.00 -1.00 -3.20
3.50 15.40 1.40 -15.70 10.50 -3.50 -4.90
3.75 14.65 0.65 -19.80 6.40 -7.60 -8.25
4.00 13.95 -0.05 -26.80 -0.60 -14.60 -14.55
4.25 13.29 -0.71 -35.00 -8.80 -22.80 -22.09
4.50 12.67 -1.33 -22.70 3.50 -10.50 -9.17
4.75 12.08 -1.92 -19.80 6.40 -7.60 -5.68
5.00 11.53 -2.47 -17.70 8.50 -5.50 -3.03
5.25 11.00 -3.00 -16.90 9.30 -4.70 -1.70
5.50 10.49 -3.51 -17.40 8.80 -5.20 -1.69
5.75 10.01 -3.99 -18.30 7.90 -6.10 -2.11
6.00 9.55 -4.45 -20.30 5.90 -8.10 -3.65

Document Created: 2005-02-24 14:07:35
Document Modified: 2005-02-24 14:07:35

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