Indicates which sideband a dual sideband spectrum represents SideBand
"
usb"
(for upper sideband), "
lsb"
(for lower sideband), or "
lo"
(for offset from the local oscillator frequency). When setting a new value, any of the
strings "
lsb"
, "
usb"
, "
observed"
, "
image"
or "
lo"
may be supplied (case insensitive).
The "
observed"
sideband is which ever sideband (upper or lower) contains the central
spectral position given by attribute DSBCentre, and the "
image"
sideband is the other
sideband. It is the sign of the IF attribute which determines if the observed sideband is
the upper or lower sideband. The default value for SideBand is the observed sideband.