01 t31 t2014
CORNEf
[,4D'18
Eleclrosmog meler is designed for
quick
measurement
of
hlgh f
requency
(FF)
Electromagnelic wave field
strength
and
power
level for living
environment,
excellent for individual
or company
with Electronragnetic
wave safety concerns. lt has
broad bandwidth
(100MHz
to BGHz), high
sensitivily
(-55dBm
to odBm) and
fast
response time. The MD18 has
build-in 2.4GHz lrequency
meter lo measure the
frequency of the delected RF
signals and with internal sensing anlenna.
Applications:
-
High
lrequency
(FF)
Electromagnetic wave field
strength and signal level measurement
-
Mobile
phone
base
station
antenna radialion
power
density measurement
-
Wireless communication applications
(A[,4/FN/,
TDL4A.
GSlVl. DECT, CDMA,
WiMax,3G,4G)
-
RF
power
level measurement for
transmitters, AC smart meter radiation from
ulilities company
-
Wireless LAN
(Wi
Fi. 2.4GHzl
5.8GHz), Bluetooth, Ultra wide-band
detection, installation
-
Spy camera,
v/ireless
bug
finder
-
Cellularcordless
phone
radiation safety level
-
Microwave oven leakage delection
-
Personal living
environment EMF satety
(1
1) Field slrength
modes with histogram:
(
see Fig.l)
RF
signal
level,
frequency, MAX
and the Histogram
are shown on the LCD display,
use UNIT
button
to select RF signal level unit
(
dBm, mw/m2, or v/m).
(12)
Large characler Field
strength mode without
histogram:
(
see Fig.2)
BF
signal
level is
shown with large character,
lrequency and MAX value
are also shown
on lhe
LCD display, use UNIT
button to select RF
signal level unit
(dBm,
mw/m2, or v/m).
(13)
Frequency
display mode:
(see
Fig.3)
Frequency is
display with large
character, signal level. MAX value
and frequency al
the N/AX,
Signal level are also displayed.
F=1920[4Hz tl1
0.3564
Features:
-
Broad Frequency
range:
-
High
Dynamic
range:
-
High sensitivity:
-
Peak
power
density measurement:
-
Field
strength measurement:
-
Frequency measurement:
'l00MHz
to SGHz
60 dB
-55dBm
to - odBm
(25mv/m
to 14.8V/m)
0.0015mw/m' to 580mw/m'
0.025v/m
lo
14.8v/m
100MHz
lo 2.4GHz
at
-35dBm
and up signal level
Fio.l
Fiq.2
Fio.3
(1
4) Frequency
meter function:
MD18 f requency
meter function
can detect
ultra
fast
on air digital RF burst
signals
from
GSM,
DECT, WiFi, bluetooth,
3c,4c and wireless
devices, with frequency lrom
100MHz lo 2.4GHz
It uses direct counting
technology to capture
the
very
short
bursts of the on the air on/off RF
signals
down to 1O0usec. which is
not
possible
by typical scanning
type of
spectrum
analyzers
It is
excellent tor field measurement
of RF
signal
level
with instant frequency information
display.
(a)
Signal level requiremenls:
to insure
the correct frequency
measurement, the minimum
FF input
signal level
should be
in
between
-35dBm
and OdBm.
Signal
lower
than
-35dBm
will not have
enough sensjtivity
to do the correct counting,
and higher than the 0dBm will
overload
the
pre-amplifier
of the frequency
meter.
(b)
Trigger level:
Since typical or.r air RF
signal is a mixture of
signals
from
several different
sources
and
is very
complicated, Adjusting
the trigger
threshold
level
of the rneter will
improve
the frequency counting
process,
the default value of
the triggering level
is
t11
(a
"
t'11" mark is shown on
the
LCD
display), use
the blue UP and DOWN butron
to
increase or decrease
the irigger ievei
unril the meier show f=0000N,4H2
(so
the signal iioor is
just
below the trigger level).
When the
signal burst is detected
and
is
over the trigger level
the meter will start counting
and show
the
lrequency
(f=xxxxMHz).
the
typical trigger
level
is
in
between t10 to t12. Depend
on the
trigger level setting, the stronger
signal
will
be
selected
by the
meter for
the frequency
measurement.
Iri hi!i
ilrrEallrQ er
lrEl
Ufl
liqi3l;'1
siqnili:
lr'lqir!!eilri
la delicl
i:r
(c)
Spread
spectrum signals:
the spread spectrum RF
signals
(OFDM.
frequency hopping...)
used in lhe WiFi,
or
DVB
broadcast
spread the signal over very wide frequency
range,
(and
with
time divjsion modulations),
the WiFi access
poinVrouter
also switchinq between
several
frequency
constantly {or
several user
channels. Because o{ the constant changing
o{
frequency
it
is
difficult to do
the correct frequency measurement
of this
type of signals.
The frequency meter function
of MD18
might have enor
of
100MHz
to 2001\,4H2 for these
type oi signals,
this
is normal
because
the signal
frequency
is
jurnping
and not
constant al
all.
Adjusting
the trigger level
and move the meter
near or lar away from
the signal
source can reduce
the error rate.
(d)
Gating
time: ln order to detect very
short digital RF
bursts
(<1
O0usec). the MDl
B
frequency
counter {unction has very
short Gating
time
(<
100usec),
this Iimits the resolution ot
the low frequency
signal measurement
(lhe
number
of signal
pulse
is not
enough for high
resolution
counting with short
gating
time),
the
MD18 frequency
meter function is intended
to
show the
frequency
information
of the detected on
air
RF
signal from the typical mobile
phone
or Wifi
applications. For frequency
measuremenl requires high resokttion
of low
frequency
signals. use the standalone
professional
frequency
counter
wilh
adjustabie Iong
Gating
time and
trigger level
iunction is recommended.
(15)
Low battery
indication: a BAT
sign will be shown
on the screen when
the
battery level
is
below 2V. Replace the
two
AA
size 1.5V Alkaline
baltery when the battery level is low.
-
LCD
digital
power
level.
power
density level, and E- field
strenglh display with
auto scale
-
Moving
graphic
Histogram, and Bar signal level display
(5dBnvsegment)
-
8 high brightness color LED to display
power
density level wlth
3 safety range indications
-
Continues wave
(AN,4/FN,4)
and high
speed digital RF
(GSl\4,
TDMA, PCS,
CDN4A,3c, 4c, Wi-Fi)
-
Fast response
time
with
easy
reading
color LED segment display
(sdBm/segment)
-
Ultra iast Frequency meter display for on
air
digital RF
short burst on/ofj
type signals
-
Max. level display
lunclion and Hold mode
-
LCD
back
light
(15
seconds
aulo-off), manual
LCD back
light
on/off control
-
Low batlery indication
-
Small, compact handheld design 14cmx6.5cmx3cm
-
Baltery
operated
(3V
DC ) two AA size 1.5V battery, not included in
the
package
IfE;tltll:lmt!!
B
Put
two1.5V battery
in
the
[,4D18.
push
the
powetrlock-bullon
(the
white button
below the ON/OFF
switch) to unlock the
power
switch and then
push
the ON/OFF switch
bulton to turn on/ofl
the
l\4D1 B.
The RF sensor is located in
the leJt
hand
side of the l\,4D18.
please
do not cover
the sensor area
with hand
or other objects.
MODE
button
is
used to switch
in
between
(a)
Field strength modes
with histogram, (b)
Large
character
Field
strength mode without histogram,
and
(c)
Frequency
display
mode,
HOLD
button can
be used
to halt
the data measurement of the MD18,
a
"
EBID
"
mark will be
shown on the LCD screen to indicate the
"HOLD"
condition. Push
the
"HOLD"
button again, the
MD18 will
exit the
"HOLD '
condition
(exit
from HOLD will
clear the MAX and Frequency).
UNIT
button
is
used to select the measured FF field
strength on the LCD
display between
dBm,
mw/m2 or
v/m.
BL butlon
can be used to turn on/turn-off the LCD backlight
of the meter.
B LED lighls. With
Red.
Yellow,
and Green color on
the
right
hand
side of LCD window is used
for
quick
RF
signal
level indications.
3 Fed LEDs are used
to indicate the
3 safety standard of
three
countries
(ltaly,
Swlss. Russian).
The
power
level
o{ each LED
can be
{ound in
the
table below.
Histogram
of
previous
30
signal
level readings
are
recorded
and
shown as moving
graph
on the LCD display.
MAX:
max value of the FF fjeld measured
since the
last
power-on
is
shown on the LCD
display; this can be used to record
the
maximum field
strength level
automatically in the area
Pushing
the
HOLD
button on/off wlll reset the MAX value.
LEFT, RIGHT,
UP, DOWN
(blue
buttons) can be used
to
move
the cursor in
the selection menu. or to
increase,/decrease
the
trigger
level of the frequency meter function.
(1)
(2)
(3)
(4)
(s)
(6)
(7)
(B)
(e)
(10)
O2014
copyrght CCFNET Microsystem
lnc
.
!:i:...!:i,i2t:lit.ij.ij;:.::i
jirt
all right reserued
LED table
and
Field
strength/power
density
readout:
-
MDtB use I
high brightness
LED
to indic;te
the measured
power
and
power
density.
With 3 safety
range
indications,
-
The
power
lev;l
and'power
density
level conversion
in the table
is calculated
based on the
MD18 internal
antenna.
and is
valld lor
MD18 only.
lf=FrlTIIII ffir [ffir
l'it?[EnEr,1
EttTtin
RED3
5dBm
T
l80m w/m'/
Salety
range#3
ltaly slandard
(1oomwim')
Cautlonl
FFD2 l0 dBm
5E frW,ln
Saiety
range#2
Swiss standard
(4omwh'?) Caution!
FEDl
15 dBm
18 mw'm
Safety
range#1
Pussian
standard
(2omwim') Cautionl
YELLOW3
.20
dBm
5 ts mw,m
sate
YELLOW2
.25
dBm
1 .B mwim'?
YELLOWl
-30
dBm
05Em!!m
sale
GREEN3
35 dBm
0.18
mw,/m'?
Wireless LAN,
WiFitypically
in this
range
safe
GREEN2
dwn
0
06 mw'm'
Scme
signal source
around
Nrfiim
.
Most high
lrequency
RF antenna
such
as Mobile
phone
base station
is
vertical
polarized
(in
vertical
direction),
therelore
while in
RF mode, the
MD18
is normally
used
in vertical
_.
direclion.
Please
rolate
the
meter to
find the
maximum
reading
direction
in either
case. The
maximum
reading
will also
increase
as
you
approach
the source.
MD18
can
be used
to lind the
location ol signal
source.
.
Most
oi.odern
"ommunication
devices
(Mobile phone, wireless
LAN, WiFi,
etc.,)
use digilal
RF
burst signals.
when measuring
this
type
oi signals,
several
LED
lights will
blinking
at
the
same
time.
this
is n"ormal
and
it can be used
as
an indication
ol burst
type
ol RF signals.
For
conlinues
waves
(AM
/ FM)
signals, the
LED
light will
be stable.
MDl8
measures the
peak power density
of the signal
with very
fas't sampling
time:lt
is more
accurale
than the
needle
style of
readout
which only
shown
the
average
value ot signal
power
most
oi
the
time.
.
EleJtromagneticwavelieldstrenglh/powerdensityreducesverytastwithdistance(distance
square),
keep a
good
distance
lrom
the high
frequency
RF
signal source
can
reduce
the high
trequency
raOiatiin
eftect.
Alumina
.foil
or
window sun
rellector
Jilm
(silver
color) can
be used
as a
elfective
and
low cost shielding
material
tor most
ot RF
radiations
'
.
MD18 is designed
lor
quick
living
environment
RF radialion
evaluation
and
is for
relerence
use only.
Oilicial
RF sale'iy
radiation
measurement
procedure is complicate
and should
be handled
byirained
technical
person wilh lab
instrumenls.
Salety
range
standard
listed below is lor
reterence only.
MD18
is not
a medical
inslrument,
Please
do not
use it in
medical,
legal or
other relaled
applications.
.
MDlsisdesignedforhomeandpersonaluse,llisnotlorcommercialrentalpurpose.
Thp Eurooean Communitv orovided oeneral
quidelines
in
ils Council
Recommendation
ol
July 1999.1
ICNIRP
published
ii.ir.i
guid"rin"r
in nprii isse.'raoie
t
give;
a sampling
of the
international
and
national
field-strenglh
limit
values lor
the
general public
and continuous
exposure.
(for
reference
only)
900MHz
j
850[4Hz
ffiEflfi
Sensor
lype:
Frequency range:
Sensitivity:
Dynamic
range:
Peak
power
measurement:
Field strength
measurement:
Frequency
measurement
Display type:
Unit
ol measurements:
Display error
rate:
LCD back light:
Display
ol data:
Safety
standard
indication:
Battery used:
Battery liie:
lniernal Antenna:
Electric
field sensor
with
internal sensing
antenna
'100N.4H2
to SGHz
-55dBm
to odBm
60 dB
0.0015
mw/m'?
to
580
mw/m'?
0.025 v/m to 14.8
v/m
1OOMHZ lo
2.4GHz
(at
35dBm
to odBm
signal
level)
Digital
LCD
display &
LED color
segment
display
dBm,
mw/m'?, or
v/m
!
3.5 dBm
1 2- 1
5
seconds
auto-off,
manual on/'off
control
LCD 3
to 5 digit,
8 LED
color segmenl.
Hislogram o{
30
reading.
LCD Bar
segnlenl
(5
dBm/segmenl)
3 salety
range
indication
by 3
Fed LED
gV,
tw6
An iize
1.5V
alkaline
or rechargeable
Nil\,4H
battery,
(not included)
>20 hours
build-in
antenna
c
-'-1
signil
lercl
bnr
treqs€ncy
histogram
powet
OHJOFF
Srgnal
,n
(dBm)
Srgnal
power
(mwrn
)
Bar
graph
5dB each
Movrrg
h slogran
MOOE'
L€FT/
DOtrTh
-
RfGHT
ttrk
SLgnal
polier
imw/m
)
Bar
graph
5dB eac
HOLD
Sr!nal
ie!el
Bar
qraph
HOLO
BL
bsck
Iight
l@G
I(t;
(ru;
lwp *
lw
e>
5dB eac
segmenl
O2014 CORNET
l"4.rcsystem
lnc
W!"r..!.aDf
i:al:'i I
I i(.f
,).';Dlll
Ilfffi=
i4.5f,1
tl
!--r:--::----r
lnlemalional
to rn.il Fecommendation 199-q,/519/EC
42 Vr'm 14750mW/m')
nternanonal
ICNIFP Guidelines.
April 1s98
42 V/m {4750mwh-)
59 V/m I9Z5UmW/m
Austfla
RM 31 120
V/m 16330mw/m' til
v,m
{
-.lqru
m
3rlsblad F 2001-1365
V/m I1 18omw/m-l
10 Vrm l231OmW/m'
.lrischc Verordnuno
42 V/m i4750mwi m-)
Italy
Decrelo
n. 381.
1998
6 V,m
{100mw
m-1"
20 V,m 11000mW'm'
20 v,m
00mW.'m')
o00mW, m'z)
The Nelherlands
Healh uouncil
5t
v/m
SwilTerland
V/m l40mw/m
LJn(ed Stales
V/m 16330mw/m
China
Drall: National
Oualily
Technology Monrtofng
Bureau
4s V1m
(633omwim?) 61
Vim
(10000mwim
Japan
Radro-Radiatlon
Protcction
GLr delirles.
1
990
49
Vim
{633omw/m'?)
61
V m
(lU000mW,rn'/l
l40OCoeman Ave#C2BSantaClara
CA
!r4050 USA
Tcl
(408)9690205
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