Japan Radio NTG420 Solid State Transmitter-Receiver User Manual Usera manual Installation

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7ZPRR0001
INSTALLATION MANUAL
FOR
THE NTG-420 SOLID STATE
TRANSMITTER-RECEIVER
Document No. 7ZPRR0001
APR. 2016
7ZPRR0001
Table of Contents
1. SELECTING THE INSTALLATION POSITION .................................................................. 2
2. INSTALLATION PROCEDURE.......................................................................................... 7
3. CONNECTING THE INSTALLATION CABLE ................................................................. 10
4. INSTALLATION OF SOLID STATE TRANSMITTER-RECEIVER (NTG-420) .................. 12
5. SOLID STATE TRANSMITTER-RECEIVER(NTG-420) WIRING ..................................... 13
6. INSTALLATION CABLE AND WAVEGUIDE ................................................................... 17
APPENDIX .......................................................................................................................... 20
MAXIMUM PERMISSIBLE EXPOSURE(MPE) CALCULATION.......................................... 29
FCC CAUTION .................................................................................................................... 31
IC (INDUTRY CANADA) ...................................................................................................... 31
7ZPRR0001
- Preface This instruction manual describes installation method of the NTG-420
Transmitter-Receiver. This manual describes radar system configuration with
X-band Radar Antenna and NCD-2247-1B PC type radar monitor display as an
example.
1. Selecting the installation position
1) Physical selection criteria
• Install the antenna at the center of the mast on the keel line.
• If the antenna cannot be installed at the above position for some reason, the
amount of deviation must be minimized. And, reinforce the mount base
and the platform and take precautions to protect the antenna from vibration
and impact at the installation position.
• To avoid the radiating section coming in contact with other installed objects
while it is rotating, ensure that there is at least 200 millimeters from the
swing circle (turning radius) to other installed objects (Fig.1-1). The swing
circle of the X-band Radar Antenna is as shown in Table 1-1.
Over 200mm
200mm 以上
min-offset
オフセット最小
min-height
必要最小高さ
reinforcing member
補強材
Fig.1-1 Installation of antenna
Table 1-1 Swing circle
Antenna
Swing circle
X-band Radar Antenna
2825mm
7ZPRR0001
• Avoid having a rope or signal flag from winding around the radiating section
thereby preventing it from rotating.
• Avoid the effects of dust and heat caused by smoke from a chimney.
• When determining the appropriate antenna height and installation location,
take into consideration the reduction of vibration, the strength of the hull and
the antenna mount base, and maintenance properties.
• Provide for maintenance space: platform, safety link, hand rail, steps, etc.
The lower edge of a radar antenna should be a minimum of 500 mm above
any safety rail.
• When installing the antenna, select a location where there are the fewest
structural objects in the surrounding area so that the capability to drive the
motor will not be depressed by the non-equability wind which is likely to
rotate the antenna.
2) Electrical selection criteria
• The installation height of the antenna relates to the maximum detection
distance. The higher is the better. (However, if it is too high, radio wave
energy greatly attenuates above the antenna's vertical beam width (the
point -3dB from the peak of the main lobe). As a result, it is difficult to
detect a close-in target. Sea clutter also increases. Determine the
installation height by taking into consideration the weight, maximum length
of the cable, and maintenance after installation.
• If the installation height of the antenna is low, it is difficult to detect a long
distance target. The ship's mast, derrick, and construction objects interfere
with radiating beam causing the range that cannot be viewed on the radar
display to increase.
Generally, the lowest antenna installation position is supposed to be on the
A-B line shown in Fig.1-2. In the case of the radar antenna, 2θ equals 20°.
Specifically, the antenna position is normally elevated so that the building
etc do not interfere with radiating beam. The inside of A point might be blind
area due to antenna beam does not propagation. So, if near distance should
be covered, antenna installation position must be considered carefully.
θ = 10°
Sea surface
θ
Building etc.
Blind area
Fig.1-2 Antenna installation height vs Vertical beam width
7ZPRR0001
• If it is considered that sufficient installation height cannot be provided when
the antenna is installed directly on the roof of the building, use a mounting
rack or radar mast (Fig.1-3). Normally, when the antenna installation
height is less than 2 meters from the roof of the building, provide a
mounting rack assembled at an angle frame to install the antenna. When
the antenna installation height is 2 meters or higher from the roof of the
building, provide a cylindrical radar mast to install the antenna. Consider
the convenience of the service staff who take care of installation,
maintenance, adjustment, and repair of the antenna by providing adequate
footholds to the mounting rack and the radar mast.
Installation
Installation
Fig.1-3 Mounting rack and mast for the antenna
• When installing the antenna, select a location where there are the fewest
structural objects in the surrounding area so that false images which
interfere with target detection will not be generated by signal reflection from
other antennas, equipments, and cargos. Only as a guide, note that
structural objects should not exist within the range of the vertical beam
width (Fig.1-4).
Vertical beam width of X-band Radar Antenna: Approx. 20° (±10.0° when
the height of the radiating section is 0°).
ビーム幅
Beam width
Fig.1-4 Antenna and the surrounding structural objects
7ZPRR0001
1m (min)
• When installing two or more antennas, antennas in close proximity should
have a minimum vertical elevation separation angle of 20 and a minimum
vertical separation of 1m where possible, so that those antennas do not
enter each other's vertical beam width range.
20°(min)
Fig.1-5 Installing two or more antennas
• To avoid interference with other equipment and to prevent radio noise from
generating, do not place the VHF antenna, AIS/GPS antenna, and
VSAT/INMARSAT's dome within the range of the vertical beam width.
If there is a concern that structural objects existing within the vertical beam
width may generate false images, equip the structural objects with a radio
wave absorber. (There are two types of absorbers: broadband type
having no specific resonant frequency and narrowband type which can
absorb a band with a specific frequency. Use those where applicable.)
Furthermore, it is effective to install a metal reflector, which reflects radio
waves upwardly, between the antenna and a structural object so that the
radar's radio wave will not directly come in contact with the structural
object.
When the structural objects exist in the surrounding area of Antenna unit,
the false echo may appear. The sector blank function is effective to
reduce the signal reflection from the structural objects. Because of it can
stop transmission. Therefore, it may reduce the false echo appearance.
Note: Because most radio wave absorbers have poor durability, some
must be replaced every year. When installing a reflector, the
area to the rear of the reflector becomes a blind sector.
Therefore, minimize the size of the reflector.
When the sector blank function set to on, ensure a sufficient
view field in the surveillance area.
* The above procedures for selecting an antenna installation position are
described based on the radar's antenna. Comprehensively select the
antenna position by considering other antennas' installation procedure
manual, building tower mast structure, strength of the selected position,
and vibration.
3) Confirmation during test run
7ZPRR0001
If the antenna vibrates a lot during test run, try to reduce or prevent
vibration by reinforcing the antenna mount base or using wire stays
attached to the radar mast.
4) Others
• The design of the mounting platform for the antenna should take into
account the vibration requirements defined by IEC 60945.
Vibration
Frequency
2 to 13.2Hz
13.2 to 100Hz
Amplitude
+/-1mm +/-10%
Acceleration
7m/s2 constant
• All installations should facilitate protection of equipment, including cabling,
from damage.
The cables should be kept as short as possible to minimize attenuation of
the signal.
• Crossing of cables should be done at right angles(90°) to minimize
magnetic field coupling.
• Eliminating the interference on frequencies used for marine
communications due to operation of the radar. All cables of the radar are to
be run away from the cables of radio equipment. (ex. Radiotelephone.
Communications receiver and direction finder, etc.) Especially inter-wiring
cables between antenna unit and display unit of the radar should not be run
parallel with the cables of radio equipment.
• Cable should not be exposed sharp bends.
• The grounding of equipment units should be carried out according to this
manual.
5) After installation
After you have completed the installation work, check and test the
installation work with customer(s) and confirm with each other.
7ZPRR0001
2. Installation procedure
1) Precautions for transporting and storing the antenna
• An antenna is a heavy load. Be very careful about handling it.
• Do not allow the antenna fall on its side while it is stored or being installed.
• Do not apply rope to the antenna in the way that squeezes or deforms the
radiating section.
• When hoisting the antenna by a crane, do not hoist it by attaching a belt or
a rope only to the antenna's radiating section as shown in Fig.2-1.
• When lifting the antenna（Fig.2-2）:
Wrap a cloth around the antenna's support section located at the bottom of
the radiator, and then attach a belt to it to lift the antenna.
Fig.2-1 Improper way to hoist
Wrap a cloth
Fig.2-2 Lifting the Antenna
2) Installation procedures
a) Maintain a flat level surface on which to install the antenna.
• Use sufficiently thick steel material and reinforcement material for the
antenna's installation surface (mount base) to reduce vibration and
impact. Keep the mount base flat and smooth.
• If there is a partial gap between the mount base and the antenna
chassis's legs, work on the installation surface so that it becomes flat
and smooth. If a gap exists and the antenna is tightly clamped, the
chassis will distort and become damaged by vibration.
7ZPRR0001
b) Avoid using vibration-proof rubber and resin
• Do not insert an elastic body, such as vibration-proof rubber or resin,
between the mount base and the antenna chassis' legs. If rubber or resin
is inserted, the amplitude of vibration increases, resulting in the possibility
of damage to the antenna. Furthermore, if installation bolts become loose
due to deterioration of rubber or resin, the antenna may be damaged or fall
from its mount.
3) Installation and clamping method
a) Installation direction
• Installation should be done so that the cable gland side is oriented
accessibility by maintenance staffs.
b) Bolts, nuts and tightening torque to be used
• Use stainless steel bolts for the antenna and uniformly tighten all of the
bolts using double nuts for each bolt so that the antenna will not
become loose (Table 2-1).
• Although the length of the bolt will differ according to the thickness of
the mount base, use a bolt long enough so that more than 4 millimeters
of thread protrudes beyond the double nuts after the double nuts have
been tightened.
Table 2-1 Length of antenna mounting bolts and tightening torque
Antenna
Unit
Thickness of
Mount Base
(mm)
Bolt
Torque (N-m)
12
M10×55(mm) SUS304
40
c) Use of washer and corrosion-resistant measures
• At the location where a bolt's head or nut comes in contact with the
antenna chassis' legs and the mount base, insert a plain washer which
fits the bolt; and, at the location where the nut comes in contact with the
plain washer, insert a spring washer, and then securely tighten the nuts
(Fig.2-3).
• To prevent corrosion due to the contacts between different metals, such
as the antenna chassis' legs, installation surface, bolts, nuts, etc., cover
the bolt's head and nuts with sealant (Fig.2-3).
7ZPRR0001
Fig.2-3 Use of washer and corrosion-resistant measures
d) Grounding and corrosion-resistant measures
• Ground the antenna chassis and the installation surface (hull) by using
an earth line. Apply sealant to the connection portion of the earth line
to prevent corrosion and damage by vibration (Fig.2-4).
Fig.2-4 Grounding and corrosion-resistant measures
7ZPRR0001
3. Connecting the installation cable
10
7ZPRR0001
11
7ZPRR0001
4. Installation of Solid State Transmitter-Receiver (NTG-420)
The mounting place of NTG-420 Solid State Transmitter-Receiver is shown below. It is
required to secure a space for equipment and maintenance.
Min. 250
Min. 400
Min. 250
Waveguide
Min. 370
Fig.4-1 NTG-420 Installation (Space for Mounting Place)
12
7ZPRR0001
5. Solid State Transmitter-Receiver(NTG-420) Wiring
Table 5-1 Connect Terminal of NTG-420
Terminal No.
Waveguide
flange(UG-51/U)
P1
P2
Not Used for this System
P3
Not Used for this System
P4
RJ-45JJ
Optical Communication
Board
(AGM-741
daughter board )
Earth Point
Connect
X-band 9ft Antenna
Cable
DC Power Supply
(DC 48V)
External Equipment
(ex. Radar Data Processor)
External Equipment
(ex. Radar Data Processor)
X-band Radar Antenna
NCD-2247—1B
Radar
Control/Monitoring PC
NCE-5584-1B IQ Data Recording
PC
Earth line
WRJ-9
Waveguide)
Power Cable
RE-422 cable or equivalent
14-core shield composite
cable(2695110056).
14-core shield composite
cable(2695110056) or equivalent
LAN cable Cat.6a
Optical Cable 2C
IV-5.5 or equivalent
PS I/F Circuit
ANT I/F Circuit
NFB
Connector Board
Cable Clamp
Earth Point
(Chassis)
Optical Fiber Cable inlet (See
below)
Fig.5-1 Inside View of NTG-420
13
7ZPRR0001
Table 5-1 Signal Layout of each Terminal
Table 5-1 (1) P1
Pin No.
Pin Name
+48V
+48V RTN
GND
In/Out
In
In
Description
+48V
+48V Return
Ground
Table 5-1 (2) P2
Pin No.
Pin Name
MNT-TX-P
MNT-TX-N
MNT-RX-P
MNT-RX-N
MNT E
NC
NC
NC
NC
In/Out
Out
Out
In
In
In/Out
Description
Maintenance Port RS-422 output-P
Maintenance Port RS-422 output-N
Maintenance Port RS-422 input-P
Maintenance Port RS-422 input-N
Shield (Ground)
Reserved
Reserved
Reserved
Table 5-1 (3) P3
Pin No.
Pin Name
VD
VD_E
TRIG
TRIG_E
BP
BPE
BZ
BZE
NMEA_P
10
NMEA_N
11
NMEA_E
12
NC
13
NC
14
NC
15
SHIELD
In/Out
Out
Out
Out
Out
Out
Out
Out
Out
In/Out
In/Out
In/Out
Description
Radar Video Signal
Radar Video Signal Return
Radar Trigger Signal
Radar Trigger Signal Return
Antenna Bearing Pulse Signal
Antenna Bearing Pulse Signal
Bearing Reference Signal
Bearing Reference Signal Return
Control/Monitoring Signal(RS-485)-P
Control/Monitoring Signal(RS-485)-N
Return
Reserved
Reserved
Reserved
Table 5-1 (4) P4
Pin No.
Pin Name
SAF SW2
SAF SW+
ΦZ
ΦZE
ΦA
ΦAE
ΦB
ΦAE
NC
10
NC
11
NC
In/Out
In
In
In
In
In
In
In
In
Description
Antenna Safety Switch Return
Antenna Safety Switch Signal
Antenna Bearing Pulse (ΦZ-Phase)
Return
Antenna Bearing Pulse (ΦA-Phase)
Return
Antenna Bearing Pulse (ΦB-Phase)
Return
Reserved
Reserved
Reserved
14
7ZPRR0001
12
13
14
15
+12V ISO
+12V RET
NC
SHIELD
Out
Out
15
+12V Antenna Encoder Power
Return
Reserved
7ZPRR0001
Flange
(M4 x 4)
Waveguide inlet
for NTG-420
(UG-51/U)
Fig. 5-2 Waveguide Flange (UG-51U) of NTG-420
16
7ZPRR0001
6. Installation Cable and Waveguide
6.1 CM14CXVBTBTV(2695110056)
This is composite cable of 14 wires with shielded coaxial cable. This cable is using
between Antenna and TRX. Also, equivalent cable can be used which is provided by
customer.
Fig.6-1
CM14CXVBTBTV(2695110056) Component
Table 6-1 CM14CXVBTBTV(2695110056) material
Core
(No.)
10
11
12
13
14
Cross Section
No. of wire / φ
(m2)
0.5
0.5
0.5
0.5
5.5
5.5
5.5
0.3
0.3
1.25
1.25
0.5
19 / 0.18
19 / 0.18
19 / 0.18
19 / 0.18
35 / 0.45
35 / 0.45
35 / 0.45
12 / 0.18
12 / 0.18
37 / 0.26
37 / 0.26
50 / 0.18
50 / 0.18
1 / 0.18
Color
Black 1
Black 2
Black 3
Black 4
Yellow
Green
Brown
White
Orange
Red
Blue
Black
Purple
Gray
Max. diameter: 23.0mm
17
Remarks
Coaxial Cable
Coaxial Cable
Coaxial Cable
Coaxial Cable
Twisted pair cable with Shield sheath white
Shield wire
7ZPRR0001
6.2 Waveguide and Cable Installation
Fig.6-2 Waveguide and Cable Installation Diagram for NTG-420 with peripheral equipment
18
7ZPRR0001
(No.)
Table 6-2 Waveguide Materials List (for Example)
WAVEGUIDE
Flange A
Flange B
①
Tapered Transit Waveguide
(Flat): UG-51/U
(Choke) : No.185BC (Choke) : No.185BC
②
Flexible Waveguide
ANDREW
Model :Elliptical Waveguide
Type：EW85
Frequency Range :
7.7-9.8GHz
③
Tapered Transit Waveguide
(Flat): UG-39/U
Remarks
(Flat) : UG-39/U
(Choke) : UG-52B/U
Notes:
For detailed assembling method, please contact waveguide manufacturer(s) including
required special tools and materials
19
7ZPRR0001
APPENDIX
Drawing
OUTLINE DRAWING
X-BAND RADAR ANTENNA
NTG-420 X-BAND SOLID STATE TRANSMITTER-RECEIVER
BLOCK DIAGRAM
X-BAND RADAR ANTENNA
NTG-420 X-BAND SOLID STATE TRANSMITTER-RECEIVER
WIRING DIAGRAM
INTERCONNECTION FOR NTG-420 X-BAND SOLID STATE TRANSMITTER-RECEIVER
(REFERENCE)
WAVEGUIDE CATALOGUE
20
7ZPRR0001
Outline Drawing of X-band Radar Antenna
Note: Performance Monitor does not included in this system.
21
7ZPRR0001
Outline Drawing of NTG-420 X-Band Solid State Transmitter-Receiver
22
7ZPRR0001
Block Diagram of X-band Radar Antenna
Slotted Array Antenna
Turning Unit
Motor
Driver
Rotary
Joint
Motor
Encorder
Safety Switch
AC100/110 or 220/230V
50/60, 1Φ
Status
Error
RF Inlet
23
Bearing
Output(ΦA,ΦB,ΦZ）
24
LC Type connector
+12V ISO
Safety Switch
Bearing Signal in
DC48V in
Trig. Video out
RS-485 Cont
RS-422 Cont
Bearing Signal out
Radar Data LAN
PS circuit
Buffer
PS I/F Circuit
Optical Fiber Cable
Signal
Distribution
Circuit
ANT I/F Circuit
Signal
Processor
Waveform
Gen.
Optical Communication
Board (AGM-741
daughter board )
D/A
MPU
RJ-45
S/P Circuit
A/D
D/A
RX IF
TX IF
AMP
AMP
MIX
LNA
LOC
OSC
LIM
SSPA
TRX Module
STC
ATT
TX MON
RF
BPF
CIR
Transducer
Microwave
Component Circuit
7ZPRR0001
Block Diagram of NTG-420 X-Band Solid State Transmitter-Receiver
RF Inlet
7ZPRR0001
Interconnection for NTG-420 X-Band Solid State Transmitter-Receiver (Reference)
(Confirm the antenna motor power before installation)
For
Antenna Motor
AC100/110V or
220/230V
Provided by User
(5.5sq or more)
Terminal Board
NFB
YEL
GRN
Cable
CM14CXVBTBTV
(2695110056)
Transmitter Receiver NTG-420
NC
P2 (D-SUB 9P)
1 MNT_TX_N
2 MNT_TX_P
JRC Standard
X-Band Radar
Antenna
3 MNT_RX_P
4 MNT_RX_N
NC
MNT_E
FG
P3 (D-SUB 15S)
VD
VD_E
TRIG
TRIG_E
BP
BPE
P4
(D-SUB 15P)
BZ
BZE
NMEA_P
10 NMEA_N
NMEA_E
15 SHIELD
Radar
Control/Monitoring
PC display
NCD-2247-1B
SEF SW-
12 BLK
SAF SW+
13
PUR
ΦZ
ΦZE
TB103
+12V
ΦA
SAF SW-
ΦAE
10
ΦZE
ΦB
11
ΦBE
12
NC
10
NC
11
NC
15
ΦZ
ΦA
Optical Comm.
Board
(APX-741A-1)
48V DC PS
DC+48V
+48V_RTN
Optical Fiber Cable
Optical
Comm.
Board
(AGM-741)
PTI
NC
PTE
NC
LVR
NC
PMS
16
NC
NC
TXI
NC
TXE
SAF SW+
NC
VERR1
NC
10
Waveguide
WRJ-9 or equivalent
Flange
UG-52B/U
GND
AC
25
ΦB
P1
(JR13PK-3P(71))
+48V
2 +48V_RTN
10
ORG
WHT
Signal
Processor
Board
(CDC1469)
IQ Data Recording PC
(NCE-5584-1B)
FG
FG
LAN cable Cat.6a
PCI-ex
TB104
SHIELD
LAN
NC
NC
RJ-45 J2
RJ-45JJ
12 +12V ISO
+12V
13
RET
14
NC
Radar Data
Relay
Terminal
Flange
UG-51/U
FG
7ZPRR0001
Waveguide Catalogue
(1) Taper Waveguide
Elliptical
Waveguide Side
Antenna Side
26
7ZPRR0001
(2) Elliptical Waveguide
27
7ZPRR0001
(3)Taper Waveguide
Elliptical
Waveguide Side
Transmitter Side
28
7ZPRR0001
Maximum Permissible Exposure(MPE) Calculation
The MPE was calculated with the antenna used as the highest antenna gain which may be used.
Radiofrequency radiation exposure limits.(Frequency: 10MHz to 300GHz)
Limits for Occupational/Controlled Exposure(mW/cm2)=5.00
Limits for General Population/Uncontrolled Exposure(mW/cm2)=1.00
NTG-420 Performance characteristics
Antenna gain(dB)=
Output Average
Power(W)=
Frequency(MHz) =
Cable Loss(dB) =
Calculated EIRP mW) =
38
Assumed 22feet Slotted Array Antenna
4.6
(dBm)=
9410
36.628
Assumed 10m Waveguide Lengh
23054613
73.628 (dBm)
Power Density(SmW/cm2)=EIRP/4･π･r2
(r=cm)
EIRP
Distance
mW
cm
23054612.7
1500
23054612.7
1450
23054612.7
1355
23054612.7
1350
23054612.7
1300
23054612.7
1250
23054612.7
1200
23054612.7
1150
23054612.7
1100
23054612.7
1050
23054612.7
1000
23054612.7
950
23054612.7
900
23054612.7
850
23054612.7
800
23054612.7
750
23054612.7
700
23054612.7
650
23054612.7
610
23054612.7
550
23054612.7
500
23054612.7
450
23054612.7
400
Distance
Feet
49.21
47.57
44.46
44.29
42.65
41.01
39.37
37.73
36.09
34.45
32.81
31.17
29.53
27.89
26.25
24.61
22.97
21.33
20.01
18.04
16.40
14.76
13.12
Power Density (S)
mW/cm2
0.81539
0.87259
0.99924 General population
1.00665
1.08558
1.17416
1.27405
1.38724
1.51622
1.66406
1.83463
2.03283
2.26497
2.53928
2.86661
3.26156
3.74414
4.34232
4.93047 Occupational
6.06489
7.33851
9.05989
11.46643
29
7ZPRR0001
23054612.7
23054612.7
23054612.7
23054612.7
23054612.7
23054612.7
23054612.7
350
300
250
200
150
100
50
11.48
9.84
8.20
6.56
4.92
3.28
1.64
14.97656
20.38476
29.35405
45.86570
81.53903
183.46282
733.85127
Conclusion:
Frequency
10MHz-300GHz
General population
Limit Minimum
Distance(feet)
Occupational Limit Minimum
Distance(feet)
44.46
20.01
The NTG-420 is radar system for operating at the land based services.
The radiating structure for the radar is typically mounted as following diagram.
The radar system will satisfy the requirements of RF exposure per rule.
Typical Installation of radar system
30
7ZPRR0001
FCC Caution
Changes or modifications not expressly approved by the party responsible for compliance could void
the user’s authority to operate the equipment.
This equipment generates, uses and can radiate radio frequency energy and, if not installed and
used in accordance with the instructions, may cause harmful interference to radio communications.
However, there is no guarantee that interference will not occur in a particular installation. If this
equipment does cause harmful interference to radio or television reception, which can be determined
by turning the equipment off and on, the user is encouraged to try to correct the interference by one or
more of the following measures:
1) Reorient or relocate the receiving antenna.
2) Increase the separation between the equipment and receiver.
3) Connect the equipment into an outlet on a circuit different from that to which the receiver is
connected.
4) Consult the dealer or an experienced radio/TV technician for help.
This device complies with Part 80 and Part 90 of the FCC rules.
Operation is subject to the following two conditions: (1) this device may not cause interference, and
(2) this device must accept any interference, including interference that may cause undesired
operation of the device.
IC (Indutry Canada)
This device complies with Industry Canada’s licence-exempt RSSs. Operation is subject to the
following two conditions:
(1) This device may not cause interference; and
(2) This device must accept any interference, including interference that may cause undesired
operation of the device.
Le présent appareil est conforme aux CNR d’Industrie Canada applicables aux appareils radio
exempts de licence.
L’exploitation est autorisée aux deux conditions suivantes :
1) l’appareil ne doit pas produire de brouillage;
2) l’utilisateur de l’appareil doit accepter tout brouillage radioélectrique subi, même si le brouillage est
susceptible d’en compromettre le fonctionnement.
31

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