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RXRL-NV Technical and Maintenance Manual
R.V.R. Elettronica S.r.l. (Bo)
Pag. 16
2.8 AUDIO PROCESS CARD
This card is mounted in the rear of the metal container situated
in the center of the unit (11 Photo1).
The Audio Process card processes the various audio signals such as MONO,
MPX, SCA and RDS coming from the 70MHz IF card.
Furthermore, it supplies these processed signals to the various
instruments found on the Anameter and Modmeter cards.
The card also provides a signal for the Muting card which displays the
muting status and allows the adjustement of the intervention threshold
(factory calibrated to approx. -83 dBm).
2.9 70MHz IF CARD
This card is mounted at the front of the metal container situated
in the center of the unit (7 Photo1).
The circuit receives a 70MHz input which is filtered, amplified and then
mixed with a 59.3MHz signal generated by a quartz crystal.
The resultant 10.7MHz signal, being the difference of the above
frequencies, is filtered and amplified and supplied to the Audio Process
card for processing.
2.10 MUTING CARD
This card is mounted on the right side of the front panel and allows
adjustment of the receiver’s muting threshold (= -83 dBm of default) and
displays the muting status with a led (16 Fig.1).
Summary of Contents for RXRL-NV
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Page 174: ...RXRL NV ii Appendix Rev 0 3 11 04 03 Pagina lasciata intenzionalmente in bianco...
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Page 178: ...RXRL NV 2 10 CPU NV Technical Appendix Rev 0 1 02 09 02...
Page 181: ...RXRL NV CPU NV 5 10 Appendice Tecnica Rev 0 1 02 09 02...
Page 187: ...RXRL NV CSSINTPLLRX 1 4 Technical Appendix Rev 0 1 02 09 02...
Page 191: ...RXRL NV CSTCX002 1 4 Technical Appendix Rev 0 1 02 09 02...
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Page 197: ...RXRL NV FLTPB7E 1 4 Appendice Tecnica Rev 0 1 04 03 03...
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