ETTC'2003 - SEE

The IOT Facilities shall provide uplink and downlink chain calibration
processing. It shall characterize RF station paths and eliminate the IOT facilities
contribution to IOT measurement.
Sequence of the measurement:
The first step : configuration of the test bench equipments and RF pathway
(ASA, PM, Uplink chain and downlink chain of RF station...)
The algorithm is:
N1 :
The reference measurement is done at channel center frequency CCF,
Select ASA function : marker peak, marker delta
N2 :
A measurement is done, at (CCF – (Channel bandwidth/2))
Selected ASA, function peak level, delta frequency and delta level
N3:
A measurement is done at center frequency in order to eliminate all drifts of
measurement conditions,
ASA function: peak level, delta frequency and delta level
N4 :
A measurement is done, at (CCF – (Channel bandwidth /2) + Frequency step)
Selected ASA, function peak level, delta frequency and delta level
For i = 5 to i = (channel bandwidth / frequency step)*2
If i is odd
Ni :
A measurement is done at CCF in order to eliminate all drifts of measurement
conditions,
ASA function: peak level, delta frequency and delta level
If i is even
Ni :
A measurement is done, at (CCF +/- (Channel bandwidth/ 2) + i frequency step)
Select ASA function: peak level, delta frequency and delta level
In order to eliminate station contribution, the result data of Station Gain versus
Frequency is taken away from the complete result file. Then, only the satellite
gain versus frequency is displayed.
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