Note:  Continuous operation is not recommended because weather return intensity may be reduced.

.
MAP – shows ground returns at selected gain level

.
TEST – shows maintenance test pattern.

Note:  If the airplane is on the ground and the thrust levers are not advanced for takeoff, WXR tests the predictive windshear system (PWS) indications. These include PWS caution, PWS FAIL, and PWS warning. Deactivating WXR on the EFIS control panel will not discontinue the test and can result in automatic WXR activation on both pilot displays. The PWS test lasts approximately 15 seconds.
YA686, YA687

Weather Radar Mode Switches
Push – selects mode. Left mode switches control the Captain’s radar display, right mode switches control the First Officer’s radar display.
.
TFR (transfer) – transfers other map display selections to related map

.  
WX/T (turbulence) – shows weather radar returns and turbulence.
Turbulence display is available on displays of 40 nm or less.

Note:  Turbulence detection requires presence of detectable precipitation. Clear air turbulence cannot be detected by radar.

.
WX – shows weather radar returns at selected gain level

Copyright . The Boeing Company. See title page for details.
11.10.32   March 28, 2005

Flight Management, Navigation -Controls and Indicators 737 Flight Crew Operations Manual
.
MAP – shows ground returns at selected gain level

.
IDNT – suppresses ground return in WX and WX/T modes

.
TEST –

.
tests weather radar system operation without transmitting

.  
shows test pattern and any fault messages on navigation display MAP, center MAP, VOR, and APP modes, with WXR selected.

Note:  If the airplane is on the ground and the thrust levers are not advanced for takeoff, WXR tests the predictive windshear system (PWS) indications. These include PWS caution, PWS FAIL, and PWS warning. Deactivating WXR on the EFIS control panel will not discontinue the test and can result in automatic WXR activation on both pilot displays. The PWS test lasts approximately 15 seconds.

Gain Uncalibrated (GAIN UCAL) Lights
Illuminated – related gain control is in an uncalibrated position.

TILT Control
Rotate clockwise – radar antenna tilts up to selected degrees from horizon.
Rotate counterclockwise – radar antenna tilts down to selected degrees from horizon.

GAIN Control
Rotate – sets gain in WX, WX/T and MAP modes.
YD651 - YD655

Weather Radar Mode Switches
Push – selects mode. Left mode switches control the Captain’s radar display, right mode switches control the First Officer’s radar display.
.
TFR (transfer) – transfers other map display selections to related map.

.
WX – displays weather radar returns without turbulence information.

Copyright . The Boeing Company. See title page for details.
Flight Management, Navigation -Controls and Indicators 737 Flight Crew Operations Manual

.  
WX+T (turbulence) – displays weather radar returns and turbulence.
Turbulence display is available on displays of 40 nm or less.

Note:  Turbulence detection requires presence of detectable precipitation. Clear air turbulence cannot be detected by radar.

.  
MAP – displays both ground and weather returns without turbulence
information.

.
GC – temporarily displays ground clutter when radar is in auto mode.

.
AUTO – activates the weather radar in multiscan mode:

.
both Captain’s and First Officer’s displays are updated simultaneously

.
tilt is automatically controlled

.  
ground clutter may be temporarily displayed by pushing the GC button

.
radar returns to manual mode with selection of WX, WX+T or MAP.

.
TEST –

.
activates test mode for both left and right displays

.  
transmitter is enabled for less than one second and then muted for the remainder of test

.  
displays test pattern and any fault messages on navigation display MAP, center MAP, VOR, and APP modes, with WXR selected.

Note:  If the airplane is on the ground and the thrust levers are not advanced for takeoff, WXR tests the predictive windshear system (PWS) indications. These include PWS caution, PWS FAIL, and PWS warning. Deactivating WXR on the EFIS control panel will not discontinue the test and can result in automatic WXR activation on both pilot displays. The PWS test lasts approximately 15 seconds.
　
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