There is no battery to change, but there is a bias voltage on the
diode which should be checked. Other possibilities for a suddenly
weaker signal are the obvious: poor optical connection, poor signal
connection. Less obvious is possible rad damage to the diode.
-- John R. Calarco Dept. of Physics Univ. of New Hampshire Durham, NH 03824 phone: (603)862-2088 FAX: (603)862-2998 email: calarco@unh.edu
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