Spectrum DSP M2 User Manual V1.1
To configure for CW operation:
• Press the mode button to select the CW mode.
• Press the filter button to select the desired receive audio bandwidth if needed.
• Press the RIT box until WPM is highlighted, then press the DSP button, and then swipe
up/down in the right side of the LCD to set the desired WPM sending speed in words-
per-minute. This parameter has no effect if set to straight-key mode.
• Press button the AFG box to highlight the STG parameter: Ensure the DSP menu is
displayed, as this enabled the up/down swiping regions, then swipe up or down on the
left-side of the LCD to adjust the STG value.
• Press the paddle/key connected to the EXT port to cause the Spectrum DSP to enter
transmit mode: Press DSP show the DSP pad shows, then swipte up and down on the
left side to adjust the volume of the sidetone. Note that the volume control (“AFG”)
setting has no effect on the level of the sidetone.
• Once you have configured the settings to your satisfaction, press-and-hold button F1
to store them in memory.
Miscellaneous notes and tips:
• The DSP “NR” (Noise Reduction) mode may be used to advantage when in CW mode,
but note that the DSP “NOTCH” mode is always disabled because it would “kill” CW
signals!
• The sidetone frequency is exactly that of the amount of transmit offset from the dial
frequency.
• If the parameter “CW Side/Off Freq” is changed - which changes the sidetone/offset
frequency - remember to change the the center frequencies of the 300 Hz and 500
Hz filters so that the center of your receive filter passband will match your transmit
frequency. If you do not do this a station that returns to you on your frequency may do
so outside the passband of your receive filter!
• There is a slight interaction between the power setting, the perceived loudness of the
sidetone gain and the sidetone gain setting. This is a known issue, but it has not been
a cause of complaints.
• NOTE: Refer to the menu item “CW TX/RX Offset“ to set up the transceiver for USB,
LSB or “Automatic” USB/LSB operation as desired. You may also configure the
transceiver so that the frequency displayed is that of the transmit carrier frequency or
that of the received signal when its pitched is matched to that of the transceiver's
sidetone.
• Pressing-and-holding MENU button when transmitting in CW, LSB or USB mode will
generate a tone that is equal in frequency to the CW sidetone and transmit-receive
offset. This may be used to “spot” the frequency so that you can transmit on the same
frequency as the station with which you are communicating. The loudness of this tone
may be adjusted using the “Adjustment Menu” option “Beep Volume”.
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