Kenwood TS-590S manual Hints and Tips

1 RECEPTION

Hints and Tips

“Which type of conversion is used?”

•During the transmission:

The up-conversion configuration is always used in all modes and bandwidths. During the transmission in SSB mode, the pass bandwidth is determined by the filter settings (digital filter of the DSP) selected in the menu mode. The pass bandwidth of the filter in the analog stage is 6 kHz and does not affect the final outcome of the frequency analysis.

•During the reception in AM or FM mode:

The up-conversion configuration is always used regardless of the frequency or pass bandwidth settings.

•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 up-conversion configuration.

•During the reception in the 50 MHz band in SSB mode with LO CUT 300 Hz and HI CUT 2700 Hz:

The up-conversion configuration is used. Though the pass bandwidth of the roofing filter is 15 kHz, the 2.7 kHz filter is selected at the second IF of 10.695 MHz.

Table 1-1 Combination of Filters at Conversion

	Analog IF filter		Frequency Setting
Conversion Type		Pass		Setting Example
	Frequency		Conditions
		Bandwidth
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
14 MHz and 21 MHz
	(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)
		2.7 kHz	BW is no more than 2700 Hz	28.250 MHz/ USB LO:
				100 Hz, HI: 2800 Hz
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
		15 kHz	AM HI CUT is between 4 kHz	50.550 MHz/ AM LO:
			and 5 kHz*1/ FM	100 Hz, HI: 4000 Hz
*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.

TS-590S

CONTENTS

5