EV9800 Datasheet, PDF (14/25 Pages) CML Microcircuits – Evaluation Kit

Evaluation Kit User Manual for CMX980A
1.6.4.2 Main Panel
EV9800
Basic Transmit Functions:
•
'Path Setup'. Sets Tx path gain to unity, phase to zero. CMX980A transmits continuous zeros: the
π/4DQPSK unit circle when I and Q outputs are observed on an oscilloscope in x-y mode.
Note: In order to run the next four items, 'Path Setup' must have previously been run.
•
'Petal Pattern'. Transmits continuous 145 degree phase shift symbol: a petal pattern when output is
observed as an x-y plot.
•
'Phase Shift'. The gain on one channel is reduced by 10dB and the phase shift between each channel
is slowly adjusted across the maximum range.
•
'Ball of Wool'. Characteristic π/4DQPSK ball of wool pattern. Generated by routing on-chip BIST
pseudo random sequence output through the Tx data path.
•
'Ramping Demonstration'. A pop-up dialog allowing demonstration of Tx ramping.
© 1999 Consumer Microcircuits Limited
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UM9800/3