Appeal No. 2000-1461
Application No. 08/716,905
present invention are made using a wideband modulated data signal rather than a swept tone,
as done conventionally.
Representative independent claim 1 is reproduced as follows:
1. A method of measuring distortion in satellite RF transponders operated at
or near saturation comprising,
transmitting a periodic RF signal having a known periodic pattern to
1
said transponders on said satellite, said wideband RF signal being generated
by modulating the output of a PN sequence generator,
receiving wideband RF signals at said transponder which retransmits
the wideband RF signals,
downconverting said relayed said relayed [sic] wideband RF signals to
baseband inphase (I) and quadrature phase (Q) signal components,
converting said I and Q signal components to I and Q digital signal
components and storing said I and Q digital signal component in computer
memory, and
performing one or more of the following measurements on the stored
I and Q digital signal components:
! Magnitude and phase response
! AM/AM and AM/PM
! Phase noise
! Bit error rate
! Data asymmetry
! I/Q channel imbalance.
“said wide band RF signal” appears to lack proper antecedent basis.1
2
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