Adjustments
7-2 HF SSB Transceiver 9323/9360/9390/9780 Technical Service Manual
Test equipment required
The following test equipment is required:
• oscilloscope 50 MHz, complete with a 10X probe with a 10 MΩ and less than
20 pF input impedance
• RF dummy load 50 Ω and power meter rated at a minimum of 100 W RMS
• RF signal generator covering the range of 400 kHz to 30 MHz, with a
calibrated output of 0.2 µV to 10 mV from a source impedance of 50 Ω
• frequency counter 50 MHz with a resolution of 1 Hz
• regulated power supply of 13.6 V ±0.2 V at 20 A peak
• two-tone audio generator operating at 700 Hz and 2300 Hz complete with 3 dB
balance control and adjustable output 0–100 mV RMS
• digital multimeter 10 MΩ input impedance
• transceiver test unit to Codan drawing 04-03190
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The microphone isolating transformer should be fitted with a mu-metal screen to
prevent the 50 Hz mains from being picked up.
• resistance box fitted with E12 series resistor range 10 Ω to 1 MΩ to assist in
the selection of the SOT resistors
• spectrum analyser for intermodulation measurements
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