|Subject:||[TenTec] Orion Filter Controls|
|From:||Bill Tippett <email@example.com>|
|Date:||Mon, 05 Jan 2004 17:54:24 -0500|
Bill Tippett wrote:|
> Here's one reason NOT to do that. When using extremely narrow BW's on
> SSB, you really need to fix PBT to +150 to 160 for maximum intelligibility.
> What you are doing is shifting a very narrow passband to a better area
> of the voice spectrum. Instead of your 1700 Hz filter spanning 0-1700
> Hz, you shift it so it spans 150-1850 Hz, which is much more intelligible.
> I believe PBT is the only way to accomplish this in Orion. In the FT-1000MP, you could
> do this in Menu 8-9
YU1NTT wrote: >Why Menu 8-9, and not the SHIFT knob???
Because you really need to do this for all SSB filters, in both TX and RX, and you don't want to be adjusting it each time. It is just most noticeable with narrow 2.0 or 1.8 filters. SHIFT in the MP only takes care of the RX issue and you would need to adjust it each time you go to SSB (like Orion below).
Orion handles SSB TX issues in the SSB Menus but there is not an equivalent for RX, so I just remember to fix PBT at +160 Hz when I use SSB with narrow roofing/DSP filters. With the MP and Yaesu 2.0 filters, I found +200 Hz for RX and +100 Hz for TX worked best. Actually I wish Orion had these controls in Menu since then I would not need to remember to set PBT to +160 for SSB. I don't use SSB much except for the CQ WW SSB, so I will need to remind myself of this next year!
73, Bill W4ZV
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