ITEM#
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EAR-200
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Description
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Counter
Surveillance RF (Radio Frequency) Detector
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Specification
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*
Impedance:
50 Ohms (BNC Socket) VSWR less than 2:1
*
Frequency range:
30 MHz - 2.8 GHz
* Sensitivity: less
than 5 mV
* Max. input:
15 dBm
* Resolution:
10 KHz for digital signals or On/Off Keying & 1 KHz for Analog
Signals
* Timebase:
Less than 1 PPM at room temperature
* Weight:
210 g
* Size: 80
mm high x 68 mm wide x 31 mm deep
* Case:
Stamped aluminum with black anodized finish
* Battery:
Internal 4 x AA 600 mAH NiCd pack
* Power:
9V-DC 300 mA
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Features
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*
7 digit Liquid Crystal Display
* Frequency counter for digital, on/off keying and analog signals
with a minimum pulse width of 250 uS.
* Ultra sensitive synchronous detector - 16 section bargraph to
show RF signal strength (-35dBm to 0dBm)
* Two range positions - the 1 GHz position for frequencies between
30 MHz and 0.8 GHz
and the 2.8 GHz position for frequencies between 500
MHz and 2.8 GHz.
* Squelch adjustment for input signals
* Hold switch to lock display
* Low battery indicator
* Low power consumption (Average 5 hour battery life) |
Controls
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*
SQL Knob - This knob turns the RF
counter on and tunes the squelch up or down to set the signal
strength for
reception.
* Range Switch - This should be
switched to the 1 GHz position for frequencies between 30 MHz and
0.8 GHz and
switched to the 2.8 GHz position for frequencies
between 500 MHz and 2.8 GHz.
* Hold Button - This holds the
current display and stops the counter from counting.
* Calibration - The calibration
adjustment opening is located on the front panel of the counter.
This allows access to the
trimmer capacitor that provides about a 10 PPM
adjustment range of the time base oscillator. This is not usually
necessary but to do so read a signal of a known
frequency before adjusting the trimmer for correct frequency
display. If you calibrate at 4.1943 MHz or above then
the counter will be more accurate.
*
Click
the following link or paste to your web browser to
download User's Guide.
http://www.EZspyCam.com/Download/MN-EAR-200.pdf |
Warranty
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*
EZ SPY Cam guarantee the RF counter and its accessories for one year
against defects in manufacture. This warranty does not cover items
that have been modified, subject to unauthorized repairs, misuse
or abuse. This warranty does not cover damage caused by excessive
power levels applied to the signal input.
* Warning:
Never attempt any kind of connection between the RF counter and a
transmitter. |
Hints
& Tips
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- NiCd
Operation
This RF counter can operate for up to six hours from its fully
charged NiCd batteries. They are charged when the unit is
plugged into the supplied AC/DC adapter. Full recharge will
occur over 12 to 16 hours. Before recharging the batteries you
should be deep cycled occasionally by allowing them to
completely discharge to maintain maximum battery capacity. The
NiCd batteries should last for several years. However, it is a
good idea to check them every twelve months for signs of
corrosion or leakage. Always replace the whole set if any one
cell fails.
- Signal
Input
When using the RF counter with an antenna for signal pick up,
random frequencies may appear on the display. This is quite
normal and is caused by the high gain of the receiver
circuits, which amplify noise in the absence of a strong
readable signal. Never get the unit too close to a transmitter
as internal damage will result.
- Antenna
Selection
The supplied telescopic antenna is best for general purpose
use. This is because its length can be adjusted to suit the
frequency required. Usually you will want a shorter antenna
for UHF and a fully extended one for VHF / HF.
- Reception
Distance From Transmitter
The distance from which you will be able to receive
frequencies will depend upon the type and location of the
transmitting antenna, transmitter output power and the
frequency in use.
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*
Click
the following link or paste to your web browser to
download User's Guide.
http://www.EZspyCam.com/Download/MN-EAR-200.pdf
|