[Premium-Rx] WJ 8617B-(S1) SSB Bandwidth Defaults

[spencer bahner]

Steve,

The 10 KHz is used as a roofing filter, followed by the 3.2 KHz upper/lower 
sideband filter. They do this so that either sideband can be selected and 
both sidebands will pass through the roofing filter. Seems like the 6.4 KHz 
IF filter followed by the 3.2 KHz SSB filter would be the 'perfect' 
combination...don't know if you can get an RX equipped with 6.4 KHz to 
default to 6.4 KHz though.

Spencer Bahner


>From: "Geoff Greer" <greer86 at attglobal.net>
>To: "stephous" <stephous at att.net>,"Premium-rx" <premium-rx at mailman.qth.net>
>Subject: Re: [Premium-Rx] WJ 8617B-(S1) SSB Bandwidth Defaults
>Date: Thu, 10 May 2007 22:16:22 -0400
>
>That radio has a separate SSB card with additional filters for SSB.  The IF 
>signal is routed through the 10 kHz filter and then to the SSB board.
>
>Regards,
>Geoff Greer
>
>----- Original Message ----- From: "stephous" <stephous at att.net>
>To: "Premium-rx" <premium-rx at mailman.qth.net>
>Sent: Thursday, May 10, 2007 5:27 PM
>Subject: [Premium-Rx] WJ 8617B-(S1) SSB Bandwidth Defaults
>
>
>>WJ 8617B-(S1) experts: What controls the bandwidth defaults in SSB mode?
>>Firmware?
>>
>>If I select USB or LSB the BW default is 10 KHz. My receiver has the 3.2 
>>KHz
>>filter in position 1, 10 KHz filter in position 2, and a total of 10 
>>filter
>>positions. You cannot force the receiver to select the 3.2 KHz filter 
>>while
>>in SSB modes. I tried several IEEE 488 commands. The filter always 
>>defaults
>>to 10 KHz, by front panel or by remote.
>>
>>Any thoughts before I open the receiver?
>>
>>Note: When you clear the receiver it defaults to BW position 1 (3.2 KHz),
>>AM, 20 MHz.
>>
>>Best Regards,
>>Steve Pappin
>>
>>PCS Associates
>>949 Glenneyre Street
>>Laguna Beach, CA. 92651-2706
>>Phone: (949) 376-7844
>>FAX: (949) 376-7866
>>http://www.pcsassociates.net/
>>
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>>
>
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