but it is based mainly on how PSK31, the first popular soundcard mode , is tuned and viewed in a waterfall.
I posted about Peter Martinez's views on this before... From the dude himself... Andy K3UK "You can use either upper sideband or lower sideband when using PSK31, but there are two things to remember. When tuning to a particular frequency, for a sked or a net for example, the exact frequency specified for the net will be the centre-frequency of the RF signal. If your radio is operating with upper sideband, the RF frequency that it will receive will be the dial frequency of the radio plus the frequency shown in the Rx Freq box in the PSK31SBW program. This means that to operate on a given RF frequency for a sked, you need to subtract the Rx Freq from the RF frequency to get the required dial frequency. If your radio is operating with lower sideband, you should add the Rx Freq value to the RF frequency to get the required dial frequency. The other thing to remember when choosing which sideband to use, is that it's important that both stations use the same keying convention when using QPSK. In this program, the default is to use upper sideband. If you choose to use lower sideband and you will be using QPSK, then you must change the keying convention for QPSK, both when receiving and transmitting. This is done by checking the Inverted QPSK box in the SETUP menu. The keying polarity does not matter with BPSK, so it does not matter which sideband to use for BPSK, and the Inverted QPSK checkbox has no effect on BPSK, but you should remember the QPSK polarity problem because you may want to switch to QPSK during a contact, and if you have the wrong polarity, you will lost the copy. It is recommend to use upper sideband for PSK31. It will be easier to read the waterfall display and decide which way to QSY if the RF spectrum is the same way up as the audio spectrum." On 9/22/06, Dave Bernstein <[EMAIL PROTECTED]> wrote: > > PSK -- which many posters here have asserted is the most popular sound > card mode -- can be used in either LSB or USB at the operator's > discretion. > > 73, > > Dave, AA6YQ > > --- In [email protected] <digitalradio%40yahoogroups.com>, John > Becker <[EMAIL PROTECTED]> wrote: > > > > I ask this before but tell me again why al the sound card > > modes are on USB when all the *pre* sound card modes > > (RTTY, PACKET, AMTOR & PACTOR and others) are > > all LSB > > > > > -- Andy K3UK Skype Me : callto://andyobrien73 www.obriensweb.com www.myspace.com/k3uk [Non-text portions of this message have been removed] Need a Digital mode QSO? Connect to Telnet://cluster.dynalias.org Other areas of interest: The MixW Reflector : http://groups.yahoo.com/group/themixwgroup/ DigiPol: http://groups.yahoo.com/group/Digipol (band plan policy discussion) Yahoo! Groups Links <*> To visit your group on the web, go to: http://groups.yahoo.com/group/digitalradio/ <*> Your email settings: Individual Email | Traditional <*> To change settings online go to: http://groups.yahoo.com/group/digitalradio/join (Yahoo! ID required) <*> To change settings via email: mailto:[EMAIL PROTECTED] mailto:[EMAIL PROTECTED] <*> To unsubscribe from this group, send an email to: [EMAIL PROTECTED] <*> Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/
