Re: [IRCA] HD Question
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Re: [IRCA] HD Question

The loudest noise from IBOC seems 14 kHz out, then drops off rapidly. So with 650 IBOC, 639 is within IBOC noise, 666 is just barely outside of IBOC noise, with a narrow filter. Ditto for 1190 IBOC with 1179 being within IBOC noise & 1206 just outside it.
   
  I noticed since maximum IBOC noise is about 14 kHz out, it is possible to get slightly reduced IBOC noise by using USB to receive 10 kHz lower & using LSB to receive 10 kHz above the IBOC frequency. 73, George S., MN

Patrick Martin <mwdxer@xxxxxxxxx> wrote:
  Why does the HD hash QRM the lower frequency more than the upper one?
In the case of 650-KSTE, the QRM is worse on 640 than 660 (splits, 639
is worse, 666 is clearer), in the case of KEX 1190, 1180 is worse and
1200 is clearer (splits 1179 is trashed, 1206 in clearer). 

73,

Patrick

Patrick Martin
KAVT Reception Manager

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