Mr Fed UP wrote in :
I use an Icom Pro III. I didn't try to compare any of the rigs with "band
scopes"
but having used real spectrum analyzers I was a bit disappointed that the
band
width (resoloution) was fixed, you could change the range of frequencies the
sweep
would span but there was also no way to change the sweep rate. To check
any kind
of close signals the indicator is worthless. It is also worthless to check
the
band spread of a signal. but then you have to pay big bucks for a real
analyzer. It does show the abusers who tune up and dial across the whole
ham band back and forth. Usually the over power limit hams with too much
money for amps and not enough courtesy to be worth working..

IMHO///
I cant say for sure, but I would guess this would be a common short coming
of
all the "band scopes" cost being the factor for doing every thing a real
analyzer does,
They simply don't have the design to see what is shown for example
transmitters with
a spurious signal close to the desired frequency. That is the picture that
is often show
on spec' sheets.

Google arrl spectrum analyzer display and wander around to view
any display
examples and most will not be the same as the band scope displays

I thought about the problem myself a year or so ago, and spent $400
(more or less) on an SDR-IQ Software-Defined Receiver from RFSpace
Inc. It makes a rather nice bandscope and spectrum analyzer, though
I'm limited to 190 KHz max bandwidth. It is nice to be able to see,
say, all the CW portion of 80m or 40m or 17m or whatnot at a time

Not a bad RX in other repects, too.

--
Objective-C++: Trying to find out exactly how many wrongs _do_ make
a right -- David Richerby