| The
biggest problem with EMF detectors is that they are not giving you the
most vital piece of information of the EM field, its FREQUENCY! They can
only give you the power associated with a EM field. To get this vital
piece of data you need to use a frequency counter.
Frequency
counters and timers are widely used items of test equipment within the
electronics industry for measuring the frequency of repetitive signals
and measuring the elapsed time between events.
Frequency counters and timers operate by counting
events within a set period or discovering what a period is by counting
a number of precisely timed events. The time periods within which events
are counted, or the precisely timed events can be generated using a highly
stable quartz crystal oscillator. This may even be oven controlled, and
in this way a very accurate reference is obtained.
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This
is a hand held frequency meter that offers accurate measurement
of frequencies or period for ranges from 5Hz to 1.3GHz. The instrument
uses a reciprocal counting technique to provide high resolution
at all frequencies. Normally 7 significant digit of reading are
produced per second of measurement time. The advantage is that these
counters can make very fast readings. A reciprocal counter will
give 1 mHz resolution in 1 ms, whereas a direct counter takes a
second to give a reading with a resolution of 1 Hz.
There are two signal inputs. Input A is a high impedance input for
frequencies in the range 5Hz to 25MHz. Input B is a nominal input
for frequencies in the range 20MHz to 1.3GHz. The LCD has indicators
showing measurement function, measurement time, overflow, low battery
and the units of the reading which may be Hz, KHz, MHz, ns, us,
ms or s. The meter also has a selectable low pass filter for stable
readings at low frequencies.
Frequency
measurement |
Input
A |
Input
B |
| Frequency
range |
5 HZ to 25 MHZ |
20 MHZ to 1.3 GHZ |
| Resolution |
0.0001 MHZ to 10
HZ |
1 HZ to 1 KHZ |
| Accuracy |
+
- 1 digit + timebase accuracy |
+
- 1 digit + timebase accuracy |
The
counters are very sensitive, when using the supplied telescopic
antenna a range of about 20m can be achieved. The telescopic antenna
is best for general purpose use. This is because its length can
be adjusted to suit the frequency required. The length of the antenna
is dependant of which input is selected. It magnifies the waveforms
seen in that range by the counter, and de-emphasize the other signals.
It
is important to remember that the counter will receive any frequencies
with in the selected range and function (direct measure or period
measure). Pushing the "HOLD" button will freeze the frequency
on the display.
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Using
the Frequency Counter in Paranormal Investigations
 |
1.
Insert the antenna into the Input A jack. Keep
the antenna at it's shortest length.
2.
Turn the Frequency counter on by moving the power switch located
on the left side of the instrument.
3.
Push the "FREQ A" button on the lower
left of the meter to select the HF filter. Adjust the antenna if
needed so that you are reading HZ, not KHZ.
4.
Use the meter in conjunction with a EMF meter or trifield to determine
the frequency the meter is reading. You can monitor the frequency
directly (FREQ A) or by period events by pushing
the "PERIOD A" button. If there are excessive
frequencies being induced into the environment, you may be able
to get a more accurate reading by using the period events filter.
5.
Once the frequency of the EM field is obtained, Push the "HOLD"
button. |
6.
Record or call in the measured Frequency.
7.
Push "HOLD" again to begin remeasuring.
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