[Tech-Assist] STL problem now critical

[Jerry Mathis]

On Tue, Mar 27, 2012 at 9:48 PM, Mike McCarthy <towers at mre.com> wrote:
>First, let's make sure the TX end is operating properly.  Did you check
>the frequency of the carrier?  I've seen TX's drift over time and only
>to be misconstrued as a failing signal in general. Put back on center
>channel and all was well again.  Check power into the dummy load.  If
>the power is significantly different than into the antenna.....
><snip>

>MM

>Once you are satisfied the TX end is as good as it can be, see if you
>see a signal on the ground at about a mile with only the old feed point..

A loaner STL transmitter has been installed already. That did not solve the problem. Plus, that issue would also show up as an AFC error indication on the receiver.

The tower crew is checking all connectors and jumpers for problems.

If I don't find the RF feed issue as the problem, what you suggest is my next step. Wattmeter and dummy load at the top of both towers, feed a transmitter into the bottom, and measure power out at the coax and SWR into the antennas.

--
Jerry Mathis