1 RECEPTION
Hints and Tips
“Which type of conversion is used?”
•During the transmission:
The
•During the reception in AM or FM mode:
The
•If WIDTH is switched from 500 Hz to 600 Hz during the reception in the 3.5 MHz band in CW mode:
While the down conversion configuration is maintained, the roofing filter is switched from 500 Hz to 2.7 kHz.
•LO CUT is changed to 200 Hz when receiving in the 14 MHz band in SSB mode with LO CUT 300 Hz and HI CUT 3000 Hz:
Because the final pass bandwidth exceeds 2.7 kHz, the operation is switched from down- conversion to
•During the reception in the 50 MHz band in SSB mode with LO CUT 300 Hz and HI CUT 2700 Hz:
The
Table
| Analog IF filter | Frequency Setting |
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Conversion Type |
| Pass | Setting Example | ||
Frequency | Conditions | ||||
| Bandwidth |
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Down conversion (in 1.8 |
| 500 Hz | BW is no more than 500 Hz | 7.005 MHz/ CW WIDTH: | |
MHz, 3.5 MHz, 7 MHz, | 11.374 MHz | 250 Hz | |||
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14 MHz and 21 MHz |
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(first IF) |
| BW is between 550 Hz and | 14.175 MHz/ USB LO: | ||
bands and if BW is no | 2.7 kHz | ||||
| 2700 Hz | 100 Hz, HI 2800 Hz | |||
more than 2700 Hz) |
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| 2.7 kHz | BW is no more than 2700 Hz | 28.250 MHz/ USB LO: | |
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| 100 Hz, HI: 2800 Hz | |||
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Up conversion (in other | 10.695 MHz |
| SSB BW is between 2750 Hz | 3.560 MHz/ LSB LO: | |
6 kHz | and 5000 Hz/AM HI CUT | ||||
than above conditions) | (second IF) | 50 Hz, HI: 3000 Hz | |||
| between 2.5 kHz and 3 kHz | ||||
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| 15 kHz | AM HI CUT is between 4 kHz | 50.550 MHz/ AM LO: | |
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| and 5 kHz*1/ FM | 100 Hz, HI: 4000 Hz | ||
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*1 In AM mode, the bandwidth | at the IF stage | is equal to the | value as double as the value for HI CUT frequency at the AF stage. | ||
CONTENTS
5
