TM 1-1510-225-10
3B-179
1. INT OFF
2. Display Area
3. 10 25 50 100 200 300
4. TILT
5. AZ MK
6. STAB
7. TGT ALERT
8. GAIN
9. FRZ
10. TEST
11. MAP
12. WX/C
13. STBY
Figure 3B-140. Color Radar Indicator
(12) WX/C. Alternate action momentary push
button used to select weather detection operation. If
WX/C or MAP is selected prior to end of warmup
period, WAIT will be displayed until RT warms up,
approximately 60 seconds. After initial turn-on and
warmup, the first press of WX/C selects weather
operation and WX is displayed. The second press
selects cyclic weather display; CYC is displayed.
Displayed red targets flash on and off once per
second; gain is automatically set to preset level.
(13) STBY. Momentary push button used to
select standby after radar has been used in an
operating mode; e.g., WX or TEST. Standby is useful
for keeping radar in ready state while taxiing, loading,
etc. In standby, antenna does not scan, transmitter is
not enabled, and display memory is erased. STBY is
displayed in Mode Field, and 100 is displayed as the
selected range numeric.
c. Display Area.
(1) Mode
Field.
Selected
function
is
displayed as STBY, WX, CYC, MAP, or TEST.
WAIT is displayed until the initial RT warmup
period has expired and the indicator and antenna are
synchronized.
(2) Auxiliary
Field.
Color
bar
relates
displayed colors to signal reflectivity levels 1, 2, 3
displayed beneath color bar.
(a) For WX, CYC, and TEST, the color
bar is green, yellow, and red. For MAP, the color bar
is cyan, yellow, and magenta.
(b) VAR replaces 1, 2, 3 in WX and MAP
when GAIN control is not in detented PRESET
position.
(c) FRZ is displayed as a blinking word
when freeze function is selected.
(3) Target Field. Blank unless target alert is
enabled causing letter T in red triangle to be displayed.
Flashing alert symbol TGT in a red rectangle is
displayed when red-level target is detected within the
target alert sector.
