Frequency alignment DX979

[Greatvalue1]

When I put a 1K tone into the mike on sideband, my frequency counter reads 1K Hertz lower on LSB and 1K Hertz higher on USB.

i.e. 27.3840 LSB, 27.3850 AM (no tone), 27.3860 USB.

Is this normal?

 

[Robb]

IIRC, yup . . .

 

[The Bruce]

Yes, for 11-meters, there's supposed to be a frequency offset on SSB vs AM. However, it seems a lot of people (and some techs) don't know this (because they've never read the alignment procedures for their radio).

SO, when they look at their frequency counters on SSB, they "think" they're transmitting "off" frequency on SSB, and then turn a couple of pots so that they're transmitting on the same frequency as AM. This is NOT how it's supposed to be.

There's a frequency offset on LSB and USB from AM for a reason, but the golden screwdrivers out there don't seem to get it.

You might as well conform with the misinformed. Since 95% of CB operators out there transmit (on SSB) on the same frequency as AM, you might as well do the same. Otherwise you'll hear a lot of reports of you being "WAY" off-frequency (even though you're technically not).

What can I say? Your radio is technically both wrong and right as the same time.

 

[Greatvalue1]

Thanks, everything seemed fine, but I've never heard before that the frequencies would be different. It's good to know. 73's

 

[Robb]

Sideband - Wikipedia, the free encyclopedia

 

[v8henry]

If you were to put a 2k tone into it you would be reading 2k offset also....