La Crosse 404-1220 User Manual

Model 404-1220 

20” Atomic Wall Clock 

Welcome to the world of radio controlled timekeeping technology. We hope you will enjoy the convenience of never 

having to set your clock again and the confidence of knowing the exact time. 

INITIAL SETUP: 

1.  Install 1 fresh C, LR14 1.5 volt ALKALINE battery at night. 

2.  The hands will spin to 12:00, 4:00 or 8 

o’clock and wait for a WWVB signal. 

3. 

THAT’S IT! During the night your clock will automatically set itself to Pacific Time. 

4.  After the clock has set itself to Pacific Time, press the correct time zone button for your location. 

DETAILED SET UP: 

1.  Install 1 fresh C, LR14 1.5 volt ALKALINE battery into the clock, observing correct polarity. 

Note: Best done at night when the signal is strongest. 

2.  The hands will spin to 12:00, 4:00 or 8 

o’clock and wait for a WWVB signal. This is normal behavior.  

Note: Do not press any buttons at this time. The hands will not move until a WWVB signal is received. This may 

take up to 5 nights due to location or interference. 

3.  When the WWVB signal is received the clock will set to its default of Pacific Time. 

4.  After the clock has set itself to Pacific Time, select a different time zone if desired, by holding the time zone 

button for 5 seconds.  The hands will correct themselves to the new time. The clock has four time zone settings. 

Time Zone Buttons: 

PT Pacific 

MT Mountain 

CT Central 

ET Eastern 

Complete set up for this clock is to simply install one fresh C, LR14 ALKALINE battery and wait. Due to the nature of 

long wave radio signals it is normally not possible to receive a signal during the day so it is best to install the battery 

late in the evening. Once the battery is installed the clock will begin searching for a signal.  Stand the clock in an 

upright position near a window with the front or back of the clock facing Colorado. If a signal is not received it will fast-

forward the hands to the 4, 8, or 12 o’clock position and search for WWVB. Within five minutes the clock should 

either: receive the WWVB signal and set itself to the exact time, or it will determine that the signal is not receivable at 

its current location and time of day.  The hands will remain at the 12:00, 4:00 or 8:00 o’clock position until the WWVB 

signal is received. 

The clock will continue to search for a WWVB signal at 15 minutes and 30 seconds before the following hours: 00:00, 

01:00, 02:00, 03:00, 04:00, 06:00, 12:00, 18:00, 22:00, 23:00 and compares internal time with the new information. 

For increased battery life, receiving time is limited to 10 minutes. 

The wonderful advantage of owning a La Crosse Technology radio controlled clock is that it is virtually trouble free.  If 

the clock receives a clear signal it will set itself perfectly.  If it does not receive a signal consider the following: 

Battery  The La Crosse Technology clock must have a fresh battery to receive and process the time signal. 

DST Button 

Time Zone 

Buttons 

Battery  

Compartment 

Battery  

Q-Set 

Button