HF SSB Transceiver 9323/9360/9390/9780 Technical Service Manual 7-1
7 Adjustments
Introduction
Preset adjustments, which are normally factory-set, will require attention only if
components that affect their settings are replaced.
The 9323, 9360, 9390 or 9780 transceiver is provided with a special Test mode
(see page 7-5, Test mode) that assists you to:
• align the receiver HPFs
• align the 45 MHz band-pass filter using only an oscilloscope, signal generator
and a simple jig, made from an 820 Ω resistor and a 100 µF capacitor attached
to clip leads
• align T201 and T202 in the 455 kHz IF filter
• check VCO1 (not adjustable)
• check and adjust VCO2
• adjust the USB channel frequency
• adjust the LSB channel frequency
• check the PA for band switching and intermodulation distortion at the top,
bottom and centre of each filter band
• check receiver sensitivity at 22 selected frequencies between 1.6 MHz and
30 MHz
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