"Richard Harrison" wrote in message
...
Crazy George wrote:
"---do a bibliographic search of Engineering Index, or Scientific
Abstracts, or whatever that school has access to."

Excellent advice from George. Motorola`s Extender usually included a
switch on the radio control head to enable or defeat Extender operation.
The only reason I can think of to defeat Extender operation is to
demonstrate its effectiveness, which can be compelling.

Richard:

One of the problems with the first production Extenders was no limit on the
total duration blanking. Since the individual pulse length was fixed, it
was possible to get 100% blanking on a readable signal, with the right noise
pulse length and rate. Motorola figured this out about the same time we
did, and quietly modified the circuitry to limit total blanking percentage.
On the other hand, the salesmen with one noisy spark plug in their demo
vehicles loved the switch. But, that's been 40+ years ago, and the details
are hazy.

--
Crazy George
Remove NO and SPAM from return address
snip

Best regards, Richard Harrison, KB5WZI