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Philips IntelliVue Quick Reference Service Manual Page 36

Telemetry system.
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Good
Bad
Figure 5 Boundaries of Good and Bad Data
RF History Strip - helpful hints:
A 92% reduction on a copier will allow 24- hours of
one channel to fit on an 8.5" x 11" sheet of paper.
Draw lines at the -60dBm ("good") and the -87dBm
("bad") power levels on the RSSI plot.
Examine the RF history strip, and any other recording
strips or wave review printouts and look for the fol-
lowing:
– Is the signal strength where it is expected?
– Does the time and number of "invalids" on the
RF history strip correlate with any available
ECG recording strips or wave review
printouts?
– What is the signal strength when "invalids"
occur? Does this indicate corruption due to a
low-signal strength or due to interference?
– Are there specific channels exhibiting
problems, or are there patterns across
channels?
36
RF Troubleshooting Tools
-40 dBm
-60 dBm
-87 dBm
104 dBm

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