On Oct 24, 5:05*pm, (Richard Harrison)
wrote:
Mark wrote:

"It is very unusual for the RF path loss to be non-reciprocal".

Yes. I believe the radios and antennas were exchanged with the same
results. So, even if separate frequencies are used in opposite
directions, the impaired direction, which was reported as unchanged,
indicates something wrong with transmission not reception at the fixed
building location. Any street location seems deaf. Perhaps there is
interference up and down the street.

Best regards, Richard Harrison, KB5WZI

In regards to non reciprocal operation, the only time I have ever
experienced this during LOS communication was during some form of
interference . Most recently this took the form of a pair of UHF
telemetry transceivers where the local end worked well with 5 other
remote transceivers but not with one at one particular location. it
turned out to be caused by an oscilator in some equipment used in a
nearby business. Normally the oscilator was keyed of and on when the
equipment was used but for a few weeks it had been constantly keyed.
Apparently this did not effect the operation of their equipment.

Jimmie