Multitone RPR 563GS, Техническое руководство

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FREQUENCY
COUNTER
POWER
METER*
Tx ANTENNA
TEST ADAPTOR
RPR 560
P654 ALIGNMENT JIG
PSG10160-1
RF
RPR 563GS/KGS
TM1187A Issue C Page 5 - 26
Figure 16: Transmitter Alignment Connections
f) Adjust L302 for maximum level.
g) Set the oscilloscope to DC input. Adjust the vertical position so that the sine wave
is in the centre of the display.
h) Retune the RF signal generator to the receiver channel frequency. Adjust C394 for
the same DC level on the oscilloscope as achieved in step g). Whilst adjusting the
signal generator output to maintain 12dB SINAD, adjust the trimmers in the following
order:- C399, C441, C412, C379, C382. Some interaction may occur between
trimmers, therefore, the tuning sequence may need repeating to optimise
A level better than -95dBm should be achieved.
Transmitter Alignment
20. The transmitter alignment procedure is as follows:
a) Connect the test equipment to the P654 as shown in Figure 16.
b) Set the transceiver into permanent transmit by initiating Engineering Test Mode 4,
or by connecting SK301, pin 1 to pin 10 (Tx Key to 0V).