[TenTec] CW-N versus CW-R

[GARY HUBER]

UCW and LCW may be better labels, inferring the receive offset from zero 
beat of the carrier. The same thing is happening with CW-N where LSB is used 
40 M and down and USB is used 20 M and up. It matters not what side band 
others are using. If the radios have been frequency calibrated and TX and RX 
are in sync, your 7005.250 kHz carriers (CW) should be on the same frequency 
no matter if one is using a 500 Hz tone UCW (CW-R) and the other is using 
750 Hz LCW  (CW-N). We used to zero beat to no tone, then set the BFO to the 
tone we liked.

My Corsair-II has a spot button that when pushed, removes the BFO offset so 
that you can tune to zero beat.  My OMNI-VII has an adjustable side tone and 
carrier offset arrangement similar to the OMNI-VI+ but with the option of 
using either UCW (USB) or LCW (LSB). I can monitor my OMNI-VII with my 
FLEX-1500 in panadapter mode; thus far I have NOT seen any shift in the 
OMNI-VII tx frequency when shifting between UCW and LCW.

The important thing to remember is that the frequency/sideband shift occurs 
in the receiving circuitry NOT on the transmitted frequency.

73 ES DX,
Gary -- AB9M

-----Original Message----- 
From: Don Rasmussen
Sent: Wednesday, July 31, 2013 12:21 PM
To: tentec at contesting.com
Subject: [TenTec] CW-N versus CW-R

Thanks to those who helped me align my OMNI VI+ BFO trimmers and TCXO. 
Without a frequency counter I would have been SUNK even though I have been 
able to perform the operation on other rigs with just an external receiver.

While testing I noticed that OMNI VI+ is hearing the same CW signal at the 
same frequency and tone as the FT2000 does when setup for CW receive on 
lower sideband.

Anyone know in general what "most" transceivers consider as the "Normal" 
sideband to receive on CW?

OMNI VI+ is fixed.

When calling a station back from his CQ, assuming you always tune for a 
700hz received note, it seems that you would be coming back to the sender on 
a slightly different frequency if receiving him on CW-LSB as compared to 
CW-USB.

Understand the transmitter always sends both sidebands. ;-)

Any ideas?
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