Introduction - Ramsey Electronics WCT3 Manual

INTRODUCTION

The WCT3 can be used to detect 315MHz, 433MHz, 125KHz, 20KHz and In-
frared signals generated by various devices such as, but not limited to, auto-
motive key fobs, tire pressure sensors, building access control systems, and
infrared remote control devices. The WCT3 provides verification of the pres-
ence of the various types of signals. It does not provide any information about
the actual data transmitted by the device.
It should be noted that all remote control devices and systems are not created
equal. There are different signal levels, signal radiation and data patterns
generated by these devices. Because of this you may find that it is necessary
to adjust the position of the WCT3 and device being tested in relation to each
other in order to obtain signal indication. This is normal operation. Remem-
ber that the WCT3 provides a basic indication of signal generation. This indi-
cation does not assure the data included on a signal is correct.
!!! PLEASE NOTE !!!
Please take note that because of the extreme sensitivity of the WCT3 we
highly recommend the use of a NO-CLEAN, ROSIN CORE solder to assem-
ble your WCT3. Also note that you should avoid use of any type of cleaning
solution to remove rosin residue. Any attempt to use cleaning solutions may
degrade the performance of your WCT3. You can purchase the recom-
mended solder from Ramsey Electronics, LLC or call us at 585-924-4560 if
you any questions.
About the signals detected:
The 315MHz section of the WCT3 is optimized to detect signals in the
315MHz range but is also useful in detecting a fairly wide range of signal fre-
quencies including 433MHz signals often used for some types of remote con-
trol systems. The sensitivity may be decreased for these signals but an indi-
cation is still possible. The 315/433MHz indicator will indicate presence of
these signals.
The 125KHz and 20KHz functions of the WCT3 are precisely tuned to detect
signals within a few kilohertz above or below the indicated frequency.
Infrared signals will be detected only if the signal is modulated with data. If an
un-modulated infrared source is present you may find that the indicator will
flash only if the source is being moved and there may be no indication if the
source is held stationary. This is normal operation and does not indicate a
problem with the WCT3.
WCT3  4