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5.5 A05 MOD DSP1
5.5.1 Preparation
• Make all the variable resistors at the center of the variable range. (R112, R115, R124,
R128, R132)
• Push “RX measure” key in PHS mode.
• Set RX parameter
Burst=“off”
Pattern=“0000”
• Set in Bit error rate screen
RF Output=“on”
Modulation=“on”
5.5.2 “I” Level adjustment
Adjust “R115” to become “4.0Vp-p ±0.2 V” on oscilloscope.
5.5.3 Offset adjustment of “I,Q”
• Measure RF output with a spectrum analyzer.
• Adjusts “R112 and R118” for the level to become minimum (below –50 dB than
carrier) at the carrier frequency+24 kHz.
5.5.4 Balance and phase of “I/Q” adjustment
• Measure RF output with a spectrum analyzer.
• Adjusts “R132 and R124” for the level at the carrier frequency–24 kHz to become
minimum (below –50 dB than the level at the carrier frequency+24 kHz).
5.5 A05 MOD DSP1
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