WT-5721
433 MHz
Radio Controlled Projection Alarm
Instruction Manual
PROJECTION
02'(
ꢀ
INVENTORY OF CONTENTS
1) WT-5721 Alarm Clock
2) TX6U Remote temperature sensor
3) AC adapter/transformer
4) Instruction manual and warranty card.
ADDITIONAL EQUIPMENT (not included)
1) Two fresh 1.5V AA batteries (optional for alarm clock)
2) Two fresh 1.5V AA batteries (for remote sensor)
FEATURES OF PROJECTION ALARM
Operation of these features is in section III.
1. Radio-controlled time and date
2. Projection of time and/or remote temperature
3. EL backlight
4. Six modes of date/seconds/temperature display
5. Indoor temperature
6. Remote outdoor temperature
7. Dual alarms
8. Adjustable snooze
ABOUT WWVB (Radio Controlled Time)
The NIST (National Institute of Standards and Technology—Time and Frequency Division) WWVB
radio station is located in Ft. Collins, Colorado, and transmits the exact time signal continuously
throughout the United States at 60 kHz. The signal can be received up to 2,000 miles away through
the internal antenna in the projection alarm. However, due to the nature of the Earth’s Ionosphere,
reception is very limited during daylight hours. The projection alarm will search for a signal every
night when reception is best.
The WWVB radio station receives the time data from the NIST Atomic clock in Boulder, Colorado. A
team of atomic physicists is continually measuring every second, of every day, to an accuracy of ten
billionths of a second per day. These physicists have created an international standard, measuring a
second as 9,192,631,770 vibrations of a Cesium-133 atom in a vacuum. For more detail, visit
will connect you to an automated time, announced at the top of the minute in “Coordinated Universal
Time”, which is also known as Greenwich Mean Time (GMT). This time does not follow Daylight
Saving Time changes. After the top of the minute, a tone will sound for every second. It is possible
that your projection alarm may not be exactly on the second due to the variance in the quartz.
However, the clock will adjust the quartz timing over the course of several days to be very accurate;
under 0.10 seconds per day.
3
QUICK SET-UP GUIDE
Hint: Use good quality Alkaline Batteries and avoid rechargeable batteries.
1. Have the indoor station and outdoor remote 3 to 5 apart.
2. Batteries should be out of both units for 10 minutes.
3. Place the batteries into the outdoor remote first then into the indoor station.
(All outdoor remotes must be started before the indoor station)
4. DO NOT PRESS ANY BUTTONS FOR 10 MINUTES.
In this time the display and sensor will start to talk to each other and the display will
show both the indoor temperature and an outdoor temperature. If the station does not
display both temperatures after the 10 minutes please retry the set up as stated above.
After both indoor and outdoor temperatures are displayed for 10 minutes you can place
your sensor outdoors and set your time.
The remote sensor should be placed in a dry, shaded area. The remote sensor has a range
of 80 feet. Any walls that the signal will have to pass through will reduce distance. An
outdoor wall or window will have 20 to 30 feet of resistance and an interior wall will
have 10 to 20 feet of resistance. Your distance plus resistance should not exceed 80 ft. in
a straight line.
NOTE: Fog and mist will not harm your remote sensor but direct rain must be avoided.
To complete the set up of your temperature station after the 10 minutes have passed
please follow the steps beginning on page 6.
4
DETAILED SET-UP GUIDE
II. BATTERY INSTALLATION
A. REMOTE TEMPERATURE SENSOR
1. Remove the battery cover. Observing the correct polarity,
install 2 AA batteries. The batteries will fit tightly (to avoid
start-up problems make sure that they do not spring free
during installation).
Battery
Cover
2. Replace the battery cover.
B. PROJECTION ALARM
1. Remove the battery cover.
2. Observe the correct polarity, and install 2 AA batteries.
3. In addition or instead of inserting
batteries, the AC adapter can be
used. Simply plug the adapter into
the receptacle on the underneath
of the alarm clock and then plug in
adapter.
4. Replace the battery cover.
5. The projector will activate and
remain on if the alarm clock is
plugged in. If only batteries are
AC adapter
receptacle
used, the projector will only be activated when a button is pressed. The projection is a
red light, not harmful under normal usage, although care should be taken to not look
directly into the light.
Note: After the batteries have been installed a tone will sound, and the LCD (Liquid
Crystal Display) will activate. The indoor temperature and the remote temperature will
be displayed (within three minutes). Also, the time will appear as “-:--”. The WWVB
search is automatically initiated, and a tower icon appears and flashes with the time
colon (no tower icon will appear if the WWVB is too weak to be detected, and the time
display will remain on “-:--”). While the WWVB search is being conducted various
numbers will appear in the time display. After 10 minutes, the projection alarm will
either display the WWVB time, or discontinue the search if the time is not found. If the
search is cancelled “-:--” will remain in the time LCD. The projection alarm will
conduct a WWVB search every hour until the first signal is found. Once the WWVB
time is found, a search is automatically conducted nightly at midnight. If the signal is
found at midnight, the tower icon will remain, if not, another search will take place
every hour (until 6:00 am) until the signal is found successfully. If no signal is found
during this period, the tower icon will not appear and the clock will search again at
12:00 am the next night.
5
III. PROGRAM MODE
To enter the Program Mode hold down the “SET” button for 1 second, until the time zone (“-5”
default) flashes in the lower left. The Program Mode Guide is laid out in a manner that allows
you to program each function separately, or you can follow the instructions entirely to program
the projection alarm. Complete programming is usually done for the initial set-up, and will
require you to skip step 1 of programming sections III through VIII. Press and release the
“SNOOZE” button at any time to exit the Program Mode, or wait approximately 15 seconds for
the projection alarm to automatically return to normal operation.
A. PROGRAMMING SEQUENCE
1. Time Zone Setting
2. Daylight Saving Time ON/OFF
3. Adjustable Snooze
4. Hour Setting
5. Minute Setting
6. Year Setting
7. Month Setting
8. Date Setting
9. Day Setting
10. 12/24-hour Mode
B. FUNCTION BUTTONS
PROJECTION
There are 7 function buttons located on the front of
the projection alarm and one on the top. The
function buttons are labeled: ALM1/HOUR,
ALM2/MIN, light intensity icon, DISPL, light
0
2'(
direction icon, SET, MODE/+, and SNOOZE (the
ꢀ
top bar).
C. TIME ZONE SETTING
1. Hold down the “SET” button for 1 second, the time zone (“-5” default) will flash in the
Date LCD.
2. Press and release the “+” button to select the appropriate time zone. There are 13
time zones to choose from (based relative to the international time standard of GMT
(“Greenwich Mean Time).
3. From –5h to –8h, a US map with the highlighted time zone will also be displayed to the
right of the time display.
4. Press and release the “SET” button to confirm the time zone setting, and to advance
to DST (Daylight saving time) setting.
-4h
Atlantic Time
-5h
-6h
Eastern Time (default setting)
Central Time
-7h
Mountain Time
-8h
Pacific Time
-9h
Alaskan Time
-10h
Hawaiian Time
-11h, -12h
0h
-1h, -2h, -3h
Next two time zones West of HAW
Greenwich Mean Time
Three time zones West of GMT
6
D. DST (DAYLIGHT SAVING TIME) SETTING
Note: The DST default is “On”, meaning that the WWVB will automatically change the time
according to Daylight Saving Time in the spring and fall. For areas that do not recognize
DST changes (Arizona and parts of Indiana) turn the DST “OFF”.
1. Hold down the “SET” button for 1 second (the selected time zone will flash); press and
release the “SET” button once more until “On” flashes in the lower left and “DST”
flashes in the upper right.
2. Press and release the “+” button to turn the DST off, as will be indicated by the display
of “OFF” in the time LCD.
3. Press and release the “SET” button to confirm the DST setting, and to advance to
select the length of the snooze.
E. ADJUSTABLE SNOOZE TIME
Note: The snooze length can be adjusted from 1 minute to 59 minutes. This duration refers
to the length of time the alarm will be disabled when the “SNOOZE” bar is pressed. If set to
“0”, activating the snooze will turn off the alarm for 24 hours.
1. Hold down the “SET” button for 1 second (the selected time zone will flash), press and
release the “SET” button 2 more times, until “Sno” appears in the lower left and
duration (“:10” default) flashes in the time LCD.
2. Press and release the “+” button to advance the snooze time from 0 (off ) to 59
minutes.
3. Press and release the “SET” button to confirm the snooze setting, and to advance to
manually set the time.
F. TIME SETTING
Note: When the WWVB signal is found, that time will over-ride the manually set time.
1. Hold down the “SET” button for 1 second (the selected time zone will flash), press and
release the “SET” button 3 more times, until the hour flashes in the time LCD.
2. Press and release the “+” button to select the hour. Note: when setting the hour, “PM”
will appear to the left of the hour display, if it is AM nothing will be displayed.
3. Press and release the “SET” button to confirm the hour setting, and to shift to select
the minutes.
4. Press and release the “+” button to select the minutes.
5. Press and release the “SET” button to confirm the time setting, and to advance to
manually set the date.
G. DATE SETTING
Note: When the WWVB signal is found, that date will over-ride the manually set date.
1. Hold down the “SET” button for 1 second (the selected time zone will flash), press and
release the “SET” button 5 more times, until the year flashes in the date LCD.
2. Press and release the “+” button to select the year.
3. Press and release the “SET” button to confirm the year, and to set the month.
4. The month will flash. Press and release the “+” button to select the appropriate
month.
5. Press and release the “SET” button to confirm the month, and to set the date.
6. The date will flash. Press and release the “+” button to select the appropriate date.
7. Press and release the “SET” button to confirm the date, and to set the weekday.
8. The weekday will flash. Press and release the “+” button to select the appropriate
weekday.
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9. Press and release the “SET” button to confirm the calendar settings, and to advance
to select either 12 or 24-hour time display.
H. 12/24-HOUR SETTING
Note: Setting to the 24 hour mode (also known as Military Time) will also change the
temperature to display in °C instead of °F.
1. Hold down the “SET” button for 1 second (the selected time zone will flash), press and
release the “SET” button 9 more times, until the “12” hour time display flashes in the
time LCD.
2. Press and release the “+” button to toggle between 12 and 24 hour time.
3. Press and release the “SET” button to confirm the 12/24-hour time display, and to
return to normal operation.
8
IV. FEATURES & OPERATIONS
A. FEATURES
1. Radio-controlled time and date
2. Projection of time and/or remote temperature
3. EL backlight
4. Six modes of date/seconds/temperature display
5. Indoor temperature
6. Remote outdoor temperature
7. Dual alarms
8. Adjustable snooze
B. RADIO-CONTROLLED TIME AND DATE
1. The projection alarm will automatically search for the time signal upon initial set-up
and every night.
2. When the signal is being received, there will be a “tower” icon flashing to the left of the
time display.
3. When the time signal has been received successfully, the tower icon will remain
steady until midnight.
4. The NIST (National Institute of Standards and Technology—Time and Frequency
Division) WWVB radio station is located in Ft. Collins, Colorado, and transmits the
exact time signal continuously throughout the United States at 60 kHz. The signal can
be received up to 2,000 miles away through the internal antenna in the projection
alarm.
5. Due to the nature of the Earth’s Ionosphere, reception is very limited during daylight
hours. The projection alarm will search for a signal every night when reception is best.
6. The WWVB radio station receives the time data from the NIST Atomic clock in
Boulder, Colorado. A team of atomic physicists is continually measuring every
second, of every day, to an accuracy of ten billionths of a second per day. These
physicists have created an international standard, measuring a second as
9,192,631,770 vibrations of a Cesium-133 atom in a vacuum.
time, call (303) 499-7111. This number will connect you to an automated time,
announced at the top of the minute in “Coordinated Universal Time”, which is also
known as Greenwich Mean Time (GMT). This time does not follow Daylight Saving
Time changes. After the top of the minute, a tone will sound for every second.
8. It is possible that your projection alarm may not be exactly on the second due to the
variance in the quartz. However, the clock will adjust the quartz timing over the course
of several days to be very accurate; under 0.10 seconds per day.
C. PROJECTION OF TIME AND/OR REMOTE TEMPERATURE
1. When plugged into an AC outlet, the projection alarm can continuously project the
time and/or remote temperature.
2. When operating on batteries alone, the projection alarm will only project when a button
is pressed.
3. The projection will auto-focus for display from three to six feet away. A dark
surrounding will be necessary to clearly see the projection.
4.
The default is projecting time (Hour and Minutes). The projection alarm can be se to
project the time (M0), remote temperature (M1), or alternating between time and
remote temperature (M2) by pressing the “DISPL” button. The selected display mode
will flash on the lower left as “M0”, “M1” or “M2”.
5. The direction of the display can also be rotated 360° in 90° increments by pressing the
directional button. There is no display on the LCD that signifies the direction.
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6. The projector case can be rotated 180° to further help orient the projected display.
7. The intensity of the projection can be adjusted to three different settings as well as
turned “off” by pressing the light Intensity button. When turned off, the projection will
02'(
ꢀ
Light intensity
Display Mode Display Direction
only come on when a button is pressed. The intensity cannot be set for the projected
display when set to “off”. When only batteries are used, the intensity setting is set to
“off” with no other options.
D. EL BACKLIGHT
1. The projection alarm has an EL backlight designed for night-viewing. This will light up
for 2 seconds whenever a button is pressed.
2. The EL backlight cannot be turned on constantly; this would drain the batteries and
burn out the EL.
E. INDOOR TEMPERATURE
1. The projection alarm measures indoor temperature with an internal sensor.
2. This temperature is displayed in °F or °C, depending on the time format (12 or 24 hour
mode). When in 12-hour format, the temperature will be in °F. When in 24-hour mode,
the temperature will be in °C.
3. The indoor temperature will take time to adjust to the surrounding temperature as the
sensor is inside the case.
4. If the remote temperature is placed next to the projection alarm, more often than not
the temperature will not be exact with one another. This is not a defect, but simply
reflects the difference in measuring methods. The remote temperature is designed for
changing temperature at a wide range.
F. REMOTE TEMPERATURE
1. The projection alarm comes with a remote temperature sensor. When set up properly,
the projection alarm will receive and display the remote temperature.
2. It is important to power up the sensor first, then the projection alarm. If batteries are
removed in the remote, the projection alarm MUST be re-set by removing power
sources and re-starting.
3. The remote temperature is measured within the remote temperature and transmitted
to the projection alarm. If outdoor temperature is desired, simply mount the remote
sensor outside. It is recommended to mount the sensor on the North side of the house
away from sources of heat or cold (away from direct sunlight, windows, vents, etc.).
4. The range of the sensor is 80 feet in open space. While the signal is able to penetrate
walls, it will decrease the range. Concrete and metal structures offer the most
resistance.
5. The sensor should not be mounted on a metal surface.
6. The sensor and projection alarm should be kept away from other sources of possible
interference including cordless appliances (telephones, baby monitors), microwave
ovens, and other strong electrical appliances.
7. The remote temperature is displayed in °F or °C, depending on the time format (12 or
24-hour mode). When in 12-hour format, the temperature will be in °F. When in 24-
hour mode, the temperature will be in °C.
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G. TIME ALARM
The projection alarm has two separate alarms for time, “ALM1” and “ALM2”. The alarms
have a different sound; ALM1 increases in volume after 25 seconds, and again after 50
seconds. ALM2 is a constant volume. The total duration is 96 seconds for each alarm.
1. SETTING THE ALARM
a. Press and hold “ALM1” OR “ALM2” for two seconds until the alarm time is
flashing.
b. Press and release “ALM1/HOUR” to advance the hour, and “ALM2/MIN” to
advance the minute. The time will display “PM” if set to PM, and nothing if set to
AM.
c. The projection alarm will revert to normal operation when no buttons are pressed
for 15 seconds. The alarm is now set and activated.
2. ACTIVATING/DEACTIVATING THE ALARM
a. After entering the alarm setting mode,
the alarm is activated (either ALM1 or
ALM2).
Alarm 2 activated
b. To toggle between activating and
deactivating the alarm, press either the
ALM1 or ALM2 briefly. “(((1)))” or
“(((2)))” will be displayed to the right of
the time display when the alarm is
activated.
c. When the snooze bar is pressed, the
display will scroll through the alarm 1
and 2 times in the lower left.
3. TURNING ALARM OFF (WHILE SOUNDING)
a. While either alarm is sounding, press and release the SNOOZE bar to disable
the alarm for the set duration (Section II. D.). If the duration is set to “0”, the
alarm will be disabled for 24 hours.
b. After the SNOOZE bar is pressed, the lower left will display the time remaining
on the snooze. The SNOOZE bar may be pressed at any time to restart the
snooze duration.
c. To disable the alarm for 24 hours, press and release any button other than
SNOOZE or projection keys.
H. CHANGING DISPLAY MODE (DAY, SECONDS, AND TEMPERATURE)
There are six possible display modes to view the day, seconds, and temperature (remote
temperature is constantly displayed). To change the display (starting at the default of
Day.Date.Year/Remote Temperature):
1. Press and release the “MODE/+” button. The display should now show
month.day.year/remote temperature
2. Press and release the “+” button a second time and the display will now show
seconds/remote temperature
3. Press and release the “+” button a second time and the display will now show
alarm1 time/remote temperature
4. Press and release the “+” button a second time and the display will now show
alarm2 time/remote temperature
5. Press and release the “+” button a second time and the display will now show
indoor temperature/remote temperature
6. Press and release the “+” button a second time and the display will now show
day.month.date/remote temperature
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V. MOUNTING THE REMOTE TEMPERATURE SENSOR
A. The Remote Temperature Sensor can be mounted in two ways: 1) with the use of screws,
or 2) using the adhesive tape.
B. MOUNTING WITH SCREWS
1. Remove the mounting bracket from the Remote Temperature Sensor. The bracket
should snap off easily.
2. Place the mounting bracket over the desired location. Through the three screw holes
of the bracket, mark the mounting surface with a pencil.
3. Where marked, start the screw holes into the mounting surface.
4. Screw mounting bracket onto the mounting surface. Ensure that the screws are flush
with the bracket.
5. Snap the Remote Temperature Sensor onto the mounted bracket.
C. MOUNTING WITH ADHESIVE TAPE
1. With a nonabrasive solution, clean and dry the back of the mounting bracket and the
mounting surface to ensure a secure hold. The mounting surface should be smooth
and flat.
2. Remove the protective strip from one side of the tape. Adhere the tape to the
designated area on the back of the mounting bracket. Remove the protective strip
from the other side of the tape. Position the Remote Temperature Sensor in the
desired location, ensuring that the Weather Temperature Station can receive the
signal.
VI. MAINTENANCE & CARE
A. Extreme temperatures, vibrations, and shock should be avoided to prevent damage to the
units.
B. Clean displays and units with a soft, damp cloth. Do not use solvents or scouring agents—
they may mark and damage the displays and casings.
C. Do not submerge in water.
D. Immediately remove all low powered batteries to avoid leakage and damage.
E. Replace with new batteries only, and of recommended size.
F. Opening the casings invalidates the warranty. Do not try to repair the units. Contact
La Crosse Technology for Repairs.
12
TROUBLESHOOTING
Problem:
The Projection is faint
Solution:
1) Change intensity setting
2) Use AC adapter
3) Darken surroundings
4) Use fresh batteries (if AC is not used)
Problem:
Solution:
Problem:
Solution:
The LCD is faint.
1) Replace the batteries.
“OFL” appears in the indoor temperature LCD.
1) Move unit to an area with warmer or cooler surrounding
temperature. Current surrounding temperatures are outside
measuring range.
Problem:
Solution:
No reception of WWVB signal.
1) It may help reception to face the front of the projection alarm in the
general direction of Ft. Collins, Colorado.
2) Wait overnight for signal.
3) Be sure the projection alarm is at least 6 feet from any electrical
devices, i.e. TV sets, computers, or other radio controlled clocks.
4) Remove batteries for five minutes, reinsert and leave the unit alone
overnight without pressing buttons.
5) If problems persist contact La Crosse Technology.
Hour is incorrect (minute and date are correct).
1) Be sure correct time zone and daylight saving time are selected.
“--.-” appears in outdoor temperature LCD
1) Check batteries in remote
Problem:
Solution:
Problem:
Solution:
2) If batteries are replaced in remote, the unit must be re-started.
Remove all batteries, and then follow start up procedure.
“OFL” appears in the outdoor temperature LCD
1) Remote temperature is out of range.
2) Check batteries.
Problem:
Solution:
3) Interference from an outside source (cordless telephone, etc.)
4) Contact La Crosse Technology.
Note: For any questions not answered, contact La Crosse Technology with the contact information
found at the end of this instructional manual.
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SPECIFICATIONS FOR WT-5721
Temperature:
Measuring range:
32°F to 122°F with 0.2°F resolution (indoor)
-21.8°F to 140°F with 0.2°F resolution (outdoor)
(0°C to 50°C with 0.1°C resolution)
Checking intervals:
Every 10 seconds indoor, 3 times in 10 minutes for
remote temperature.
Power source:
AC Adapter (included)
Battery type:
Input: 120VAC/60Hz Output: DC 6V/100MA
Station: 2 x AA, 1.5V (Alkaline) (optional)
Sensor: 2 x AA, 1.5V (Alkaline)
Battery life:
Approximately 12 months, depending on projection
and backlight use
Dimensions (L x W x H):
5.25”W x 3.75”H x 1.25”L
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WARRANTY INFORMATION
La Crosse Technology, Ltd provides a 1-year limited warranty on this product against manufacturing
defects in materials and workmanship.
This limited warranty begins on the original date of purchase, is valid only on products purchased and
used in North America and only to the original purchaser of this product. To receive warranty service,
the purchaser must contact La Crosse Technology, Ltd for problem determination and service
procedures. Warranty service can only be performed by a La Crosse Technology, Ltd authorized
service center. The original dated bill of sale must be presented upon request as proof of purchase to
La Crosse Technology, Ltd or La Crosse Technology, Ltd’s authorized service center.
La Crosse Technology, Ltd will repair or replace this product, at our option and at no charge as
stipulated herein, with new or reconditioned parts or products if found to be defective during the
limited warranty period specified above. All replaced parts and products become the property of La
Crosse Technology, Ltd and must be returned to La Crosse Technology, Ltd. Replacement parts and
products assume the remaining original warranty, or ninety (90) days, whichever is longer. La Crosse
Technology, Ltd will pay all expenses for labor and materials for all repairs covered by this warranty.
If necessary repairs are not covered by this warranty, or if a product is examined which is not in need
or repair, you will be charged for the repairs or examination. The owner must pay any shipping
charges incurred in getting your La Crosse Technology, Ltd product to a La Crosse Technology, Ltd
authorized service center. La Crosse Technology, Ltd will pay ground return shipping charges to the
owner of the product to a USA address only.
Your La Crosse Technology, Ltd warranty covers all defects in material and workmanship with the
following specified exceptions: (1) damage caused by accident, unreasonable use or neglect
(including the lack of reasonable and necessary maintenance); (2) damage occurring during shipment
(claims must be presented to the carrier); (3) damage to, or deterioration of, any accessory or
decorative surface; (4) damage resulting from failure to follow instructions contained in your owner’s
manual; (5) damage resulting from the performance of repairs or alterations by someone other than
an authorized La Crosse Technology, Ltd authorized service center; (6) units used for other than
home use (7) applications and uses that this product was not intended or (8) the products inability to
receive a signal due to any source of interference.. This warranty covers only actual defects within
the product itself, and does not cover the cost of installation or removal from a fixed installation,
normal set-up or adjustments, claims based on misrepresentation by the seller or performance
variations resulting from installation-related circumstances.
LA CROSSE TECHNOLOGY, LTD WILL NOT ASSUME LIABILITY FOR INCIDENTAL,
CONSEQUENTIAL, PUNITIVE, OR OTHER SIMILAR DAMAGES ASSOCIATED WITH THE
OPERATION OR MALFUNCTION OF THIS PRODUCT. THIS PRODUCT IS NOT TO BE USED
FOR MEDICAL PURPOSES OR FOR PUBLIC INFORMATION. THIS PRODUCT IS NOT A TOY.
KEEP OUT OF CHILDREN’S REACH.
This warranty gives you specific legal rights. You may also have other rights specific to your State.
Some States do no allow the exclusion of consequential or incidental damages therefore the above
exclusion of limitation may not apply to you.
15
For warranty work, technical support, or information contact:
La Crosse Technology
2809 Losey Blvd. S.
La Crosse, WI 54601
Phone: 608.782.1610
Fax: 608.796.1020
e-mail:
(warranty work)
(information on other products)
web:
FCC ID: OMO-01RX (receiver)
OMO-01TX (sensor)
THIS DEVICE COMPLIES WITH PART 15 OF THE FCC RULES. OPERATION IS SUBJECT TO
THE FOLLOWING TWO CONDITIONS:
1. THIS DEVICE MAY NOT CAUSE HARMFUL INTERFERENCE, AND
2. THIS DEVICE MUST ACCEPT INTERFERENCE RECEIVED, INCLUDING INTERFERENCE
THAT MAY CAUSE UNDESIRED OPERATION.
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