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Philips IntelliVue Quick Reference Service Manual Page 25

Telemetry system.
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Frequent Dropouts and NO SIGNAL, WEAK
on a Single Channel
These symptoms indicate that the signal being received
has invalid or corrupted RF data and the signal strength
is not at an acceptable level. To isolate this fault, do the
If the problem is occurring on a single channel:
1. If the INOP is intermittent, or if there is intermittent
operation of the leads off LEDs, complete the
following substeps:
a. Check to see if the battery contacts are
corroded. If they are, clean or replace the
battery contacts.
b. Make certain that the transmitter has both
battery contact screws installed. If either
screw is missing, replace it. (Screws are
included in the battery contact kit).
c. Check the transmitter case screw and make
certain it is not loose. If this screw is loose, the
battery contacts do not make a good
connection with the internal electronics. See
page 1 for torque requirements.
2. The transmitter and receiver may not be set to the
right frequencies.
– For systems operating between 406-480 MHz,
the transmitter and receiver must be set to the
same frequency.
– For extended band systems (590-632 MHz)
there may be the wrong combination of
transmitter frequency, frequency converter
option, and receiver frequency. Check that the
following is true for all installed channels:
transmitter frequency – frequency converter option
RF Troubleshooting Procedures
= receiver frequency


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