User's Manual

PINEAPPLE TECHNOLOGY, INC V.6. ADAPTIVE PRE-CORRECTOR WEB SERVICE OPERATION
DTXPRO-10U OPERATING AND SERVICE MANUAL
CANNOT BE COPIED OR DISTRIBUTED WITHOUT PRIOR AUTHORIZATION
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V.6 DXDPRO-10U ADAPTIVE PRE-CORRECTOR WEB SERVICE OPERATION (Continued)
B. ELECTRICAL INTERFACE
2. Interface to the Transmitter
The non-linear sense input must be connected to a suitable coupler/tap-off at a point right after the power
amplifier before
any band limiting filter. The linear sense input must be connected to a suitable
coupler/tap-off point after the channel filter. Notice further that the bandwidth between the RF output of
PT2160 and the input of the power amplifier must be at least 20MHz wide to ensure effective non-linear
pre-correction of the amplifiers non-linearity.
PTPT
THE INFORMATION PROVIDED HEREIN IS PINEAPPLE TECHNOLOGY INCORPORATED PROPRIETARY INFORMATION AND
C. OPERATION OF ADAPTIVE PRE-CORRECTOR
RF out
PT2160
Power
Amplifier
Channel
Filter
Sense-1
Non-Linear
Sense-2
Linear
1. Connection and Verification of Signal Levels
The RF output and the sense inputs of the PT2000 Terrestrial Gateway unit must be connected as described
in above in Sub-section 2 - Interface to the Transmitter. The graphical illustration of the two sense inputs in
the web service block schematic will appear in green color if the level is within the valid range for the
respective input. If the level is marginal relative to the required max/min limits the input will be shown in
yellow color. If the level is outside the valid range the input is shown in red color. For optimal result the
corrector should only be operated with input levels in the ‘green’ state. Performance with ‘yellow’ input state
is not guaranteed. The adaptive pre-corrector is not usable when the level is in the ‘red’ state.