# PDT-11/150 down

Tony Duell ard at p850ug1.demon.co.uk
Mon Oct 16 18:03:46 CDT 2006

> > I was at a Radio Shack a couple months ago and observed these line
> > monitors being removed from inventory.  They said they'd be
> > liquidated by
> > someone else.  Jameco may be a more reliable source for this gizmo
> > now.
>
>    That sucks.  They are extremely handy little devices.  I use mine
> all the time.

\begin{aol}
Me too
\end{aol}

The one I have has 7 bicolour LEDs, monitoring TxD, RxD, RTS, CTS, DSR,
DTR and CD. I find it very handy fo checking an unknown serial port (is
it DTE or DCE), seeing if data is flowing, etc.

I have other RS232 test equipment too, up to a Tekky datacoms tester, but
I still normally grab this little 'christmas tree' [1] tester first.
There's no way I can set it up wrongly for a state. Of course sometimes I
do need the more adcanced testers, but not very often

[1] That's what they tend to be called over here, because of the red and
green flashing lights ;-)

-tony