Jeep 2007 Patriot - Manual (Page 190)

Programmable Features) menu, press and release (less
than one second) the EVIC button several times until
“Calibrate Compass (Yes)” is displayed. Using a long
button press (more than one second), pressing the EVIC
button will place the Compass in calibration mode. The
Cal indicator will come on continuously in the EVIC
display to indicate that the compass is now in the
calibration mode and that the vehicle can now be driven
to calibrate. (A short EVIC button press from the
ЉCali-
brate Compass (Yes)
Љ screen will exit the EVIC Customer
Programmable features, and return it to its normal oper-
ating mode). To complete the compass calibration, drive
the vehicle in one or more complete 360 degree circles
under 5 mph (8 km/h) in an area free from power lines,
large metallic objects, until the CAL indicator turns off.
The compass will now function normally.
RADIO GENERAL INFORMATION
Radio Broadcast Signals
Your new radio will provide excellent reception under
most operating conditions. Like any system, however, car
radios have performance limitations, due to mobile op-
eration and natural phenomena, which might lead you to
believe your sound system is malfunctioning. To help
you understand and save you concern about these “ap-
parent” malfunctions, you must understand a point or
two about the transmission and reception of radio sig-
nals.
Two Types of Signals
There are two basic types of radio signals... AM or
Amplitude Modulation, in which the transmitted sound
causes the amplitude, or height, of the radio waves to
vary... and FM or Frequency Modulation, in which the
frequency of the wave is varied to carry the sound.
UNDERSTANDING YOUR INSTRUMENT PANEL 189
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