The factory default maximum frequency of the FDM-DUO is 54MHz. However, for experimental
purposes, user can extend the frequency range up to 165MHz setting the FDM-DUO as follows : menu 2
“RX LP” on OFF and menu 33 “TX OUT” on 0dBm. But if the FDM-SW2 software is connected to the FDM-
DUO it blocks the frequency at 55MHz. For experimental purposes, this limitation can be unlocked :
close the FDM-SW2 software, go to the configuration files directory (“local drive”\Users\“your user
name”\Documents\ELAD\FDM-SW2), open the FDMSW2SwSetup.xml file, search for the UnlockDUOt
label and set it to ‘1’. Save and close the file, restart the FDM-SW2 software. If you are using profiles (see
Signal Control Panel), there is a copy of the FDMSW2SwSetup.xml file in each “ProfileX” directory. If
you created profiles before editing the main FDMSW2SwSetup.xml file, it will have the UnlockDUOt
label set to ‘0’. If necessary edit the UnlockDUOt labels in these files too.
When you are running SW2, you can use WBFM stereo, it should appear in the MODE drop-down selector. Nothing else to do other than check that the bandwidth is wide enough. WBFM is not available in standalone.
Now remember that the standalone mode of the DUO and the basic mode in SW2 only have 192kHz of available bandwidth
If you want to look at the whole of a 3MHz band *at the same time*, you will need to select something like the 3072kHz mode in Setup->Advanced. You can go up to 6144kHz wide, but you lose some resolution
Menu 53 needs to be set to 2500 for 12.5kHz spacing, it is only relevant on transmit so has no effect on broadcast reception.
You might want to change the contrast and gain of the waterfall by moving the top and bottom of the coloured slider at the left. I usually set the bottom edge to about the noise level, then set the top to maybe 50dB more, sometimes 20dB for very weak signal work.
If the transverter needs you to transmit above 29.7MHz from the main output, you will have a problem as that is out of the band plan for 10m. If it uses the 0dBm output like my transverters all do, then no problem. Receive will be fine on any frequency apart from the area around 122.88MHz as Andy’s notes on his website will show.