Marantz SR620 - Page 14

8.2 OUTLINE OF FUNCTIONS
@ Receiving Bands
1) FM/MW/LW bands can be received in European region and FM/AM bands in Japan and U.S.A.
2) AM band for U.S.A. is able to receive up to 1710 kHz, and 9kHz separation is also available.
Range of Receiving IF Frequency | Reference
Frequency ‘a Stop Frequency
Destination | Band Name Remarks
FM Europe 50 kHz sepa-
ration
|
MW | 522 ~ 1611 MHz +450 kHz | 9 kHz 9 kHz MW 9 kHz separation
LW 153 ~ 360 kHz +450 kHz 1 kHz 1 kHz 1 kHz separation
FM 87.5 ~ 108.0 MHz +10.7 MHz | 100 kHz 25 kHz FM U.S.A. band
MW U.S.A. 10 kHz separa-
tion
MW U.S.A. 9 kHz separa-
tion
76.0 ~ 90.0 MHz —10.7 MHz | 100 kHz 25 kHz FM JAPAN band
+
522 ~ 1611 kHz +450 kHz | 9 kHz 9 kHz MW 9 kHz separation
FM 37.50 ~ 108.00 MHz +10.7 MHz 50 kHz 25 kHz
520 ~ 1710 kHz +450 kHz 10 kHz 10 kHz
522 ~ 1710 kHz +450 kHz 9 kHz 9 kHz
8.3 EXPLANATION OF OPERATION
@ PLL Unit
1. Reference Frequency and Crystal Oscillator
Oscillation frequency from the crystal oscillator is divided to generate reference frequency of 25 kHz at time of FM, 9 or
10 kHz at MW and 1 kHz at LW.
@ Crystal oscillation frequency is 7.2 MHz.
@ The crystal oscillator has a built-in self-bias amplifier and can be composed easily only by connecting a crystal and a
capacitor. Further, oscillation is stopped under the inhibit state.
Reference Frequency Remarks
25 kHz at FM band
9 kHz at MW 9 kHz separation
10 kHz at MW 10 kHz separation
1 kHz at LW band
2. Programmable Counter
The programmable counters for FM and AM (MW/LW) are in different circuit configuration.
1) FM Programmable Counter
The FM programmable counter is of swallow count type in combination with eo As a result, reference frequency
25 kHz is obtained and performance is improved.
In this case, the transmission delay time of PSC output for controlling TD6104P is limited. PSC transmission delay time
td < 250 ns.
2) AM Programmable Counter
The AM (MW/LW) programmable counter is of direct division type.
The signal transmitted from AM channel can be directly input to AMjy terminal.
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