TNAG-2109-FCO40-3008-Outer-Space-Act-1986-extension-to-Hong-Kong-1990 — Page 150

Exhibit B

3.2.3

End of Life Equivaleat Isotropic Power, G/T and Saturated Flux Density

The minimum equivalent isotropic radiated power (EIRP) and G/T per RF channel for single carrier saturated output operation measured at any frequency within the center 10 MIlz as specified for the 105.5° and 116° orbital locations, shall be equal to or greater than the values indicated for selected performance locations in Tables B-1 through B-12. Also see Figures B-4 through B-11 for typical antenna gain contours over the coverage regions. These typical performance contours represent innermost (worst case) over band and innermost of odd and even modes.

TWTA in a

meet

all

of

Any RF channel using

redundant mode shall a the performance requirements except that the EIRP requirement may degrade up to 0.5 dB.

The maximum

saturated flux density (SFD) required to drive any transponder to an EIRP that is equal to or greater than the EIRP values indicated in Tables B-1 through B-12 shall be less

B-1 through B-12 shall be less than -82 dBW/m2, 10.5 dB and

than -89 dBW/m more

With 0.5 dB at beginning of life.

0 dB adjustable attenuation, the -82 dBW/in will be achieved at the -1.5 dB/K contour level, at beginning of life. Over design life, the maximuin SFD required from any location specified in Tables B-6 through B-12 shall not degrade by more than 3dB.

3.2.4

Switchable Pads

The gain of each individual transmission channel shall be capable of being decreased by 3 ±0.25 dB, 6 ±0.5 dB, and 9 ±0.75 dB by ground command by inserting attenuators in each of the 24 channels. The maximum gain setting is designated as 0 dB.

3.2.5

Cross Polarization Isolation

same

The response of the spacecraft to crosspolarized uplink signals from either the China or Thailand/Pakistan coverage regions shall be at least 33 dB below the response to the copolarized uplink signals from the region. Likewise, the crosspolarized downlink signals transmitted by the spacecraft

either

coverage region shall

least 33 dB below copolarized downlink signals to the same region.

to

be at

the

Additionally, the crosspolarization isolation between any channel in one region, China or Thailand/Pakistan, and any cofrequency channel in the corresponding adjacent region, at any of the locations specified in Tables B-3 through B-12, shall be at least 30 dB with a design goal of 33 dB.

B-8

ע

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