[Kenwood] SM-220/230 Questions

Fri, 19 Apr 2002 12:09:57 -0700

----- Original Message -----
From: "Roy Sakabu" <[email protected]>
To: <[email protected]>
Sent: Friday, April 19, 2002 7:39 AM
Subject: [Kenwood] SM-220/230 Questions

> Hello list,
> I have a few questions regarding the "Station Monitor" scopes (SM-220,
> SM-230) from the TS-940/950 era, mostly about the scope portion.
> How do they work?  Does it take the IF output from the radio and display
it?

Yes, the 8 mhz IF is used to display the spectrum immediately above and
below your operating frequency. Normal oscilloscope displays operate
in the time/duration mode the pan-adapter in the 2220/230 displays
in time/frequency.

> Can you do the same thing with a plain old oscilloscope?

Yes, but you would need something like the pan-adapter to make it
work.

> When using the pan adapter, do you get a spectrum sweep where you can
"see"
> who's talking above and below the frequency you are tuned to and is this
> similar to something like the IC-756Pro/Pro2 scope?

Similar, but in my opinion, a little better. It is my understanding that the
Icom radios allow you to see a one time sweep, where the 220 has
a continuous sweep that operates full time.

> How wide can you sweep?

Either +-20 khz or +-100khz.

> I just got a TS-940 (what a big, beautiful radio).  Can I use either the
> SM-220 or the SM-230?

Not sure if they are interchangeable, but the SM-220 was for the 940
and the SM-230 was for the 950. Different IF's I think, but not too sure.

> Do you know of a web page that might describe the functions/features of
the
> scopes?

No, but possibly a manual might be available on line somewhere?

>
> Thank you very much,
> Roy
> AD6ZU

Hopefully someone better qualified than me will fill in the blanks, Roy.

73 Gary WG7X