Lathem 7500E - Manual (Page 37)

22
33 34
RADIO SIGNAL RECEPTION
About Radio Signal Reception
The Model 7500E is programmed to see the WWVB radio signal everyday.
Initially the time recorder will search for a signal immediately after you set the
time zone. Once the clock has initially set, it will search for the signal every
few hours per day to maintain accuracy. The WWVB signal is the strongest
early in the morning, when there is the least amount of interference from other
sources.
There are some environments and weather conditions that may influence the
reception of the AM radio signal. Just as with an AM radio, the Model 7500E
can be positioned for optimal reception. For instance, it is best to position the
clock away from metal studs and toward the direction of the tower in
Colorado. Since this time recorder contains a highly accurate quartz timer, it
will function with a very high level of accuracy between signal receptions.
The Model 7500E will operate as a normal electronic time recorder without
having to receive the signal. Since it also operates as a highly accurate
(+/- 15 seconds per month) quartz time clock, it will function properly while
outside the reception area or if it can not receive the WWVB signal.
Verifying the Time
The best way to verify the correct time is to call the NIST at (303) 499-7111
(long distance charges may apply). Any other sources, including the time
number in your local phone book, the Internet, cell phones, and Cable TV
receivers may be off by several seconds.
Signal Reception Indicator
FLASHING: Unit is receiving the atomic radio
signal.
ON: Unit successfully received the atomic radio
signal.
OFF: Unit was unable to receive the radio signal.
(See "Troubleshooting" section.)
SU TU WE TH FR SA MO
Reception
indication