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vi HF SSB Transceiver 9323/9360/9390/9780 Technical Service Manual

Voltage regulators.................................................................................................7-3

Crystal oven..........................................................................................................7-4

Test mode..............................................................................................................7-5

Accessing Test mode...................................................................................7-6

Test channels for 2.0 to 26.5 MHz PA assembly........................................7-7

Test channels for 2.25 to 30 MHz PA assembly (1.6 to 30 MHz

with Option LF fitted) .................................................................................7-8

VCO checks and adjustments.............................................................................7-10

VCO1 check..............................................................................................7-10

VCO2 check..............................................................................................7-10

VCO2 adjust..............................................................................................7-11

HPF/LPF filter alignment ...................................................................................7-12

HPF filter...................................................................................................7-12

LPF filter ...................................................................................................7-13

45 MHz filter alignment (08-04962) ..................................................................7-14

Alignment—method 1...............................................................................7-14

Alignment—method 2...............................................................................7-15

45 MHz filter alignment (08-05322) ..................................................................7-17

Alignment—method 1...............................................................................7-17

Alignment—method 2...............................................................................7-18

455 kHz IF and noise limiter alignment .............................................................7-19

Exciter output transformer balance.....................................................................7-20

Frequency adjustment.........................................................................................7-21

Frequency adjust USB...............................................................................7-21

Frequency adjust LSB ...............................................................................7-21

Mute adjustment .................................................................................................7-22

PA adjustments...................................................................................................7-23

Driver bias.................................................................................................7-23

PA bias ......................................................................................................7-23

Output power.............................................................................................7-24

Output power 27 MHz band (9323 only)..................................................7-25

Intermodulation.........................................................................................7-26

Receiver performance checks.............................................................................7-28

Codan 9360 Service Manual

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