Regarding frequency protection. The ILS I flew was at KCWA on 110.3, the
VOR at KSTE is on 110.6, and it's less than 15 miles away. The ILS DME was
flakey at 2000 ft agl, within 10 miles of CWA, while the DME from STE was
rock solid at the same location.
Jim

"Jim Burns" wrote in message
...
Does anybody know the typical range of the DME signal when DME is
installed
in conjunction with a localizer or ILS?

I shot an ILS yesterday that had it's compass locator decommissioned some
time ago, so now the approach requires a VOR or DME, which is fine,
because
we've got both in addition to the GPS. But the DME seemed to act pretty
flakey. Sometimes it indicated over one hundred DME out, when we were
only
8-9 miles away. Outbound it flickered on and off, inbound it was dead on
perfect. It also worked perfect flying back to our home airport that has
a
VOR/DME on the field.

Is the DME associated with an ILS a "low power" or special version that is
different from that installed in conjunction with VOR's?

Thanks,

Jim