Rhotheta RT-600 Light User manual

User Manual
RT-600 Light

Direction Finder RHOTHETA RT-600 Light
RHOTHETA Page 2 of 22 User Manual
Edited by:
RHOTHETA Elektronik GmbH
Dr.-Ingeborg-Haeckel-Str. 2
82418 Murnau
Germany
Tel.: [phone] - 0
Fax: [phone] - 15
Internet: www.rhotheta.de
E-Mail: em[email protected]
Copyright
 RHOTHETA Elektronik GmbH
All rights reserved
Issue: [2017/12/08] [Rev 1.00]
Document-ID: 12-9-1-0021-3-1-60
LoJack is a registered trademark of LoJack Corporation.
Note:
The manufacturer reserves the right on making modifications of the product described herein at any
time and without previous information.

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Index
1LEGEND OF SIGNAL WORDS ......................................................................................................................... 5
2SAFETY.............................................................................................................................................................. 5
2.1 General Safety Information ......................................................................................................................... 5
2.2 Basic Safety Instructions............................................................................................................................. 6
3GENERAL INFORMATION................................................................................................................................ 7
4INSTALLATION ................................................................................................................................................. 8
4.1 Antenna unit................................................................................................................................................ 8
4.2 Influence of antenna location and environment on the bearing accuracy................................................... 9
5CONFIGURATION ........................................................................................................................................... 10
5.1 Mounting ................................................................................................................................................... 10
5.2 Offset of Bearing....................................................................................................................................... 10
6OPERATION .................................................................................................................................................... 11
6.1 Operational Modes.................................................................................................................................... 11
6.2 Squelch ..................................................................................................................................................... 12
6.3 Frequency Band........................................................................................................................................ 13
6.4 Tracking in the 216 to 220 MHz band (only available with version LE)..................................................... 14
7TECHNICAL DATA .......................................................................................................................................... 15
7.1 Electric features ........................................................................................................................................ 15
7.2 Interface.................................................................................................................................................... 17
7.3 Mechanical features.................................................................................................................................. 18
8LEGAL INFORMATION ................................................................................................................................... 19
8.1 Legal Limitations of Use within the EU ..................................................................................................... 19
8.2 EU Declaration of Conformity ................................................................................................................... 19
8.3 Disposal within the European Union ......................................................................................................... 19
8.4 Disposal outside the European Union....................................................................................................... 19
9APPENDIX ....................................................................................................................................................... 20
9.1 Frequency Ranges.................................................................................................................................... 20
9.2 Frequencies of channels on maritime band.............................................................................................. 21
10 NOTES ............................................................................................................................................................. 22

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List of Figures
Fig 1) RT-600 Light Front View................................................................................................... 7
Fig 2) Antenna Mounting Drawing, all dimensions are in [mm] ................................................. 8
Fig 3) Worst case example of the installation............................................................................. 9
Fig 4) Connector Amphenol (PT07GS1) .................................................................................. 17
Fig 5) Mechanical Drawing (all dimensions in [mm]) ................................................................ 18
Reference Documents
Ref
Document-ID
Document Title
Rev
Editor
[1] 12-9-4-5-00002-2
Interface Specification for Antenna Units
(RT-500-M RT-600 RT-800)
[Rev 1.00] RHOTHETA
The reference document is issued from RHOTHETA separately on request.

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1 Legend of Signal Words
Note
This symbol designates tips or additional notes that must be paid attention to and make work
easier.
Caution
means that ignoring the instructions may lead to property damage or loss of data.
Warning
means that ignoring the instructions, there may be a danger to health or life.
2 Safety
2.1 General Safety Information
RHOTHETA Elektronik GmbH is constantly trying to keep the safety standard of the products up to
date and to offer the customers the highest possible level of safety.
RHOTHETA products are designed and tested in accordance with the valid safety regulations. The
compliance with these standards is continuously monitored by our quality assurance system.
This product is tested and left the factory in perfect technical and safety-relevant condition. To maintain
this condition and to ensure safe operation, the user must pay attention to all instructions and warnings
given. For any questions regarding these safety instructions, RHOTHETA Elektronik GmbH can be
contacted at any time.
The observance of the safety instructions will help to prevent personal injury or damage caused by all
kinds of dangers. This requires that the following safety instructions must be read carefully and
understood before using the product, as well as observed when using the product. The additional
safety instructions such as for protecting persons appear in relevant parts of the product
documentation and must also be paid attention to.
The use of this product other than its designated purpose or in disregard of the instructions of the
manufacturer is the responsibility of the user. The manufacturer takes no responsibility for the misuse
of the product.
The manufacturer is not liable beyond the scope of legal rules!
This guide is part of the product RT-600 Light and is retained throughout the lifetime and to pass with
the product.
For the reasons explained in 6.3 “Tracking in the 216 to 220 MHz band” RHOTHETA does not offer -
and is not to be held responsible for - any guaranteed minimum range or distance to a transmitter in
this band.

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2.2 Basic Safety Instructions
Caution / Warning
Read and observe the following instructions, warnings and safety instructions of the
manufacturer!
•At all work, the local or national safety and accident prevention regulations must be
observed.
•When installing or operating with the product always follow the manufacturer's instructions.
•Do place the product on appropriate locations.
•Do not expose the product environmental conditions (heat, humidity, wind load etc.) that
exceed the specified conditions in the manuals.
•Use only the manufacturer prescribed components and/or use only recommended material
and do not change this. Any other use or unauthorized modifications to the product will void
the authorization to operate it.
•Connect only approved accessories kits or additional equipment.
•Ensure that the connections with information technology equipment, e.g. industrial
computers, comply with the IEC 60950-1/EN 60950-1 standard that applies in each case.
•The product may only be opened by authorized personnel. The connector must always be
disconnected before opening.

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3 General Information
The RHOTHETA direction finder system RT-600 Light is designed to receive and locate emergency
signals and special application signals on the international distress and application specific frequencies
in the VHF / UHF frequency range.
The system consists of an Antenna Unit (AU), which is designed light and robust for typical use on
unmanned aircraft.
The RT-600 Light is a modern precision direction finder intended for professional SAR (search and
rescue) and LE (Law Enforcement) purposes, and there are two versions of the RT-600 Light:
•The STANDARD or “A” version receives and locates signals on all international VHF-UHF
emergency frequencies, including marine channel 16 and all COSPAS/SARSAT channels
•The LAW ENFORCEMENT or “LE” version receives and locates special signals tracked by law
enforcement and special organizations, but it also receives and locates signals on international
VHF emergency frequencies including marine channel 16 and all COSPAS/SARSAT channels.
The system is based on the proven and reliable RT-600 system for manned aircraft, which was
designed for usage in harsh conditions, mounted on aircraft or vehicles.
The excellent performance of the RT-600 Light is possible due to our revolutionary patented wide band
antenna and it’s sophisticated bearing analyzing algorithms, which deliver quick and steady
information.
The system is operated over the serial interface. The appropriate communication protocol is described
in the reference document (please s. Ref. [1]).
Fig 1) RT-600 Light Front View

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4 Installation
4.1 Antenna unit
A convenient position of the monopole bearing antenna is crucial for good bearing results. The antenna
needs an effective ground connection to the body of the aircraft or to the roof of the vehicle. If there is
no metallic mounting surface available, a metallic sheet or similar (e.g. net) with connection to ground
has to be applied first between aircraft-body and antenna.
For optimal function of the direction finder it is recommended to use a metallic ground plane with a
minimum diameter of 470 mm.
In the hatched area, the antenna touches the body of the
aircraft
/ vehicle
. In order to obtain a good ground
connection, the surface of the body should be bared.
(Measuring unit [mm])
8 x holes for mounting the
antenna unit to the
aircraft / vehicle.
Fig 2) Antenna Mounting Drawing, all dimensions are in [mm]
For the electrical and data connection, the antenna should be connected to the aircraft by a suitable
cable (corresponding to the used Control Unit). The mating connector is included in the scope of
delivery. For the pinout description please s. chapter 7.2 Interface.

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4.2 Influence of antenna location and environment on the bearing
accuracy
The bearing accuracy of the direction finder antenna unit is severely influenced (comparable to an
airspeed sensor) by the environment. For comparison, a perfect high quality speed sensor will not
indicate the true airspeed, if this sensor is interfered by strong turbulences.
The direction finder antenna unit acts as a sensor for electromagnetic waves. In the near field of this
antenna unit, any conductive (e.g. metallic) obstacle will influence the incoming wave field and create
reflections which decrease the bearing accuracy. These are general physical limitations concerning all
types of direction finder systems.
Note
To achieve the best bearing results, it should be considered that the antenna unit is installed as far
away as possible from any other vertically polarized conductive structure. If possible, there should be
no reflectors within an area of 2-3 feet (0,5 – 1 m) around the antenna unit.
Fig 3) Worst case example of the installation
In this example, the antenna unit is located too close to the cable cutter of the helicopter. This cutter
will produce strong reflections, especially as the length is equal to Lambda/4 within the VHF airband
and the direction finder system will not work properly.

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5 Configuration
5.1 Mounting
The RT-600 Light can be mounted in a “top”-position (e.g. roof of the vehicles) or a “bottom”-position
(e.g. bottom of the aircraft).
The mounting position is crucial for the correctness of the bearing results.
The mounting position has to be adjusted over the mounting parameter of the serial interface data
protocol (for data protocol please s. Ref. [1]).
Based on this, the bearing is calculated considering the angle of incidence of the wave and the
mounting position of the antenna. This setting is crucial for correctness of the bearing results.
To guarantee a correct configuration and performance of the system, the user should verify – and
change if necessary – the mounting parameter via the serial interface data protocol by setting the
appropriate byte (for detailed information please s. Ref. [1]).
5.2 Offset of Bearing
The RT-600 Light has to be mounted on the aircraft in the way that, the 0° - marker ("North"-marker) is
on the longitudinal axis of the aircraft and points in the flight direction. If the antenna cannot be
mounted (for different reasons) in such way, the deviation correction has to be done via the setting of
the appropriate byte in the interface data protocol (please s. Ref. [1]). The offset is adjustable from 0°
to 359° (e.g. -15° = 345°).

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6 Operation
6.1 Operational Modes
The operation of the RT-600 Light is ensured by the settings of the serial interface protocol.
For detailed information please s. Ref. [1].
There are several modes to operate the direction finder system RT-600 Light:
1. Bearing Standard Direction Finder Mode
This is the standard mode of operation. To ensure the main function of the RT-600 Light (the bearing)
the frequency and the squelch settings have to be done. To operate the direction finder in this mode
the appropriate data byte of the interface data protocol has to be set (detailed information about
squelch s. chapter 6.1).
2. Cospas/Sarsat Decoding Mode
This mode is intended especially for the use together with beacons transmitting a data signal according
to COSPAS-SARSAT specifications in the 406-MHz-Band.
The COSPAS-SARSAT pulses are decoded (message content, GPS position) in this mode. While this
operation the bearing is interrupted.
To operate the direction finder in this mode the appropriate data byte of the interface data protocol has
to be set (for detailed information please s. Ref. [1]).
3. Cospas/Sarsat Scanning Mode (Auto scanning of CospasSarsat: 406.022…406.076 MHz)
If the exact frequency of the COSPAS-SARSAT beacon is unknown, it is strongly recommended to use
the COSPAS-SARSAT scanning functionality in order to detect the correct frequency. In this mode the
whole COSPAS-SARSAT sub-band is scanned within less than 400 ms in order to detect the presence
of a signal on any of the frequencies. If a signal is detected, the scanning stops and the signal at the
founded frequency can be used for the bearing.
While this mode is activated the bearing is interrupted (for detailed information please s. Ref. [1]).
4. LoJack Decoding & Bearing Mode with [Filter=VLU]
This mode is only available with the RT-600 Light version “LE”.
The mode is created for the Law Enforcement and other special ops users, who frequently engage in
tracking SVRS (Stolen Vehicle Recovery System) signals such as LoJack (LoJack Corp, FCC 90.20
Part 2 SVRS).
In the “VLU” filter mode the direction finder system scans the LoJack frequency (173.075 MHz) for a
signal with the valid VLU (Vehicle Location Unit) code. That means, the signals only coming from the
vehicles will be analyzed (not the base station signals).
Since several signals with the valid VLU can be received simultaneously, the correct one (which has
the searched ID) can be targeted explicitly in the mode “Decoding & Bearing Mode with “Filter = ID” (for
detailed information please s. Ref. [1]).
For additional information you can request the “User Manual RT-600” at RHOTHETA Elektronik.
5. LoJack Decoding & Bearing Mode with [Filter=ID]
This mode is only available with the RT-600 Light version “LE”.
After receiving the wanted signal with the correct VLU code from the stolen vehicle, due to the
“Decoding & Bearing Mode with [Filter=ID]”, this vehicle can be targeted explicitly (without receiving the
distracting VLU signals from other vehicles) (for detailed information please s. Ref. [1]).
6. Fast Band Scanning Mode
In this mode the direction finder system scans the actual frequency band (defined by “Frequency Start”
and “Frequency Stop” bytes in the transmitting interface data protocol) in order to detect a signal. The
duration of one scanning cycle is approx. 3 seconds.
While the scan is running, the bearing is interrupted (for detailed information please s. Ref. [1]).
7. Bearing Test Mode (PS-RAM right rotation / only for RHOTHETA internal use)
The test modes are designed only for RHOTHETA internal use.

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8. Bearing Test Mode (PS-RAM left rotation) / only for RHOTHETA internal use)
The test modes are designed only for RHOTHETA internal use.
9. Calibration for Bearing Mode (only for RHOTHETA internal use)
This mode is designed only for RHOTHETA internal use.
10. Fast Channel Scanning Mode (fast scanning of up to 8 frequencies)
The Fast Channel Scan enables the scanning of eight freely selectable frequencies across all
supported bands in a very fast manner. The scan process lasts less than two seconds. All channels
are scanned continuously. In Fast Channel Scan mode the Autosquelch is enabled automatically (for
detailed information please s. Ref. [1]).
11. AU Info & Auto Error Send Mode
The RT-600 Light always waits for an incoming data stream message from the Control Unit (Master). If
there is no data available (timeout after 500 ms, or data inconsistent) then the Antenna Unit switches to
auto send mode and sends automatically without request from Control Unit the auto send data
protocol. In the moment of receiving valid data of the Control Unit this mode is disabled and the
Antenna Unit operates in the standard mode (for detailed information please s. Ref. [1]).
6.2 Squelch
The main challenge of operating a direction finder is trying to use only the signal transmitted by the
target in order to calculate its bearing accurately, because noise and RF disturbances will cause
misleading bearing indications.
In order to prevent the direction finder to calculate bearing results which are due to noise and
disturbances, several techniques are available.
If a signal can be distinguished from noise or other signals by its message content (e.g. LoJack ID),
only transmissions containing the required message content are used for bearing.
In other cases the squelch can be used to suppress unwanted weak signals and noise. A squelch
level, called threshold has to be set by the user via the serial interface data protocol by setting the
appropriate byte (for detailed information please s. Ref. [1]). All signals with strength below this
threshold value will be ignored, while signals with strength above this level will cause a bearing
indication.
So for a signal to be usable for bearing calculation it has to be sufficiently stronger than noise or
disturbing signals that the receiver can clearly distinguish between wanted and unwanted signals. As a
result of the squelch technique the receiver sensitivity is reduced to the level set by the squelch
threshold, decreasing the maximum distance or range to the transmitter.
However it might be desirable to obtain bearing information even for weak signals which are very close
to the noise level. In this case it will be necessary to reduce the squelch level below the noise level. As
soon as the modulation of a signal can be heard on the speaker, it can be expected that bearing
calculation is possible.
If the noise is randomly distributed – as with “white noise” – and no other signal is received, the bearing
indication will also be random. If the noise is not random but rather a specific disturbance, the bearing
indication will point to the source of the noise.
If there is a very weak signal “buried” in the noise, this signal will produce a correct bearing indication
thanks to sophisticated bearing technologies used in the RT-600 Light system. Fluctuations due to
noise will be small even at low signal levels however the reaction time of the bearing indication can
increase.
To verify if a bearing indication is due to white noise or to an internal disturbance source, or if it is due
to a valid signal, the aircraft should make a slow turn. If the bearing indication is due to an external
signal, e.g. a SAR beacon, the bearing indication should compensate the changed relative flight angle.
Example: With a bearing indication of 30° the signal is hardly audible as it is buried in the noise. The
airplane makes a turn left by 60°. If the bearing indication is not changing to approximately 30°+60° =
90° after a few seconds, the bearing is likely to be due to noise or internal disturbances from the
aircraft.

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Note
The weaker a signal is, the longer it will take to change the bearing. Durations around 5 seconds are
not unfamiliar in such cases. Therefore, it is not useful to use this procedure for signals with short
transmission times and low transmit duty cycles, such as COSPAS-SARSAT transmission. The
procedure is best suited for ELT transmission with a continuous signal and still well-suited for ELTs
with intermittent transmission (down to 33%).
In cases where the RT-600 Light checks signal validity autonomously and without useful possibilities of
user interaction, user interaction is not possible and the squelch purely follows internal rules
appropriate to the type of signal received. The appropriate setting “Autosquelch” can be done over the
serial interface data protocol by setting the appropriate byte, which is described in the reference
document (please s. Ref. [1]).
6.3 Frequency Band
Frequency bands availability depends on the system version (A, LE) and its wide band options (F1 to
F4). These optional wide bands are available if ordered in addition to the default bands.
Here is a listing of DEFAULT and OPTIONAL bands available with each version of the system.
RT-600 Light (STANDARD) Listing of bands:
Default bands available OPTIONAL extended bands available
Band designation Frequency limits Option Designation Frequency limits
VHF Emergency Band:
118.000 … 124.000 MHz
>
F1
VHF Air Band:
118.000 … 136.992 MHz
VHF Marine Band:
154.000 … 163.000 MHz
>
F2
Extended VHF Marine:
137.000 … 224.995 MHz
UHF Emergency Band:
240.000 … 246.000 MHz
>
F3
UHF Air Band:
225.000 … 399.975 MHz
COSPAS SARSAT:
400.000 … 406.092 MHz
UHF FM Band:
406.100 … 410.000 MHz
>
F4
Additional UHF FM:
406.100 … 470.000 MHz
RT-600 Light (Law Enforcement) Listing of bands:
Default bands available OPTIONAL extended bands available
Band designation Frequency limits Option Designation Frequency limits
VHF Emergency Band:
118.000 … 124.000 MHz
>
F1
VHF Air Band:
118.000 … 136.992 MHz
VHF Marine Band:
154.000 … 163.000 MHz
>
F2
Extended VHF Marine:
137.000 … 163.000 MHz
LoJack:
164.000 … 174.000 MHz
ETS:
216.000 … 220.000 MHz
COSPAS SARSAT:
400.000 … 406.092 MHz

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6.4 Tracking in the 216 to 220 MHz band (only available with
version LE)
The Version RT-600 Light LE features scanning and bearing functionality in the 216.000 MHz to
220.000 MHz band.
The 216.000 MHz – 220.000 MHz band contains frequencies and signals used by special services, and
tracked by law enforcement, special ops, and similar organizations. These are some of the frequencies
and services in this band:
•CFR 90.259 tx: 216.000 MHz to 220.000 MHz
•Low Power Radio Service (LPRS) tx: 216.000 MHz to 217.000 MHz
•Medical beacons, Project Lifesaver tx, wrist/ankle tx: 213.000 MHz to 216.000 MHz
•ETS tx, stolen cash/asset recovery tx, “bait”/”tag” tx: 216.000 MHz to 220.000 MHz
tx = transmitter(s)
Note
However any user of the RHOTHETA RT-600 Light must be aware that tracking signals on the
frequencies listed above may be challenging and even frustrating, due mostly to negative factors in
some of the transmitters:
• Very low RF power output,
• Inefficient antennas,
• Battery-powered devices with a “low battery” condition,
• Devices worn or located in conditions of poor RF propagation,
• Devices with channel spacing different than the one specified for the RT-600 Light.
These factors can make it very difficult for the direction finder to receive the signal and/or to display an
accurate bearing.
Disclaimer:
For the reasons explained above, and even though the RT-600 Light features top performance in its
class, RHOTHETA does not offer - and is not to be held responsible for - any guaranteed minimum
range or distance to a transmitter in this band.

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7 Technical Data
7.1 Electric features
Method of bearing: Doppler-principle (3 kHz rotational frequency, right / left rotation)
Bearing accuracy1: ± 5° RMS
Internal resolution: 1°
Bearing Sensitivity: VHF Air/Emergency: ≤ 4 µV / m (typical)
VHF Marine: ≤ 3 µV / m (typical)
UHF Emergency and ETS: ≤ 8 μV/m (typical)
COSPAS-SARSAT: ≤ 8 µV / m (typical)
LoJack Decoding
(50 % Message Error Rate)
and bearing: ≤ 5 μV/m (typical)
Frequency stability: ± 2.0 ppm (Δf/f = ±2·10
-6
)
Reception frequencies,
SAR version
(Standard):
Frequency Options:
VHF Emergency Band: 118.000 to 124.000 MHz (8.33 kHz steps, AM)
VHF Marine Band: 154.000 to 163.000 MHz ( 5.00 kHz steps, FM)
UHF Emergency Band: 240.000 to 246.000 MHz (25.00 kHz steps, AM)
UHF FM Band: 406.100 to 410.000 MHz ( 5.00 kHz steps, FM)
COSPAS-SARSAT: 400.000 to 406.092 MHz
Including 406.022 to 406.076 MHz (Channel A .. S)
F1: VHF Air Band: 118.000 to 136.992 MHz
F2: extended VHF Marine Band: 137.000 to 224.995 MHz
F3: extended UHF Air Band: 225.000 to 399.975 MHz
F4: additional UHF FM Band: 406.100 to 470.000 MHz
Reception frequencies,
LAW Enforcement
version:
Frequency Options:
VHF Emergency Band: 118.000 to 124.000 MHz (8.33 kHz steps, AM)
VHF Marine Band: 154.000 to 163.000 MHz (5.00 kHz steps, FM)
LoJack: 164.000 to 174.000 MHz (12.5 kHz steps, FM)
ETS: 216.000 to 220.000 MHz (10/12.5 kHz, AM)
COSPAS-SARSAT: 400.000 to 406.092 MHz
Including 406.022 to 406.076 MHz (Channel A .. S)
F1:VHF Air Band: 118.000 to 136.992 MHz
F2: extended VHF Marine Band: 137.000 to 163.000 MHz
COSPAS-SARSAT
fast scan mode:
Full automatic detection of any active COSPAS-SARSAT channel A to S
within 400 ms
COSPAS-SARSAT
decoding:
Reception and decoding of COSPAS-SARSAT data signal (112 or 144 bit),
specified according to COSPAS-SARSAT
LoJack decoding: Selectable LoJack ID decoding and selective active filtering
1With undisturbed wave field and sufficient field strength. Measuring by changing the angle of incidence, with the antenna
rotating on a revolving table in order to eliminate environmental influences on the results. No modulation.

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Special scanning
modes: Complete maritime ship band scanning within 3 s
Bearable modulation: A3E, F3E, A3X (ELT-modulation), F1D, G2D, COSPAS-SARSAT
Bearing largely independent of modulation
Polarization: Vertical
Polarization error : ≤5° at 60° field vector rotation
Garbling cone: Ca. 30° to the vertical
Time of response2: ≤50 ms (with sufficient reception signal strength)
Operating voltage: +10 V to 30 V DC
Power consumption: At 12 V DC: Power consumption = 200mA / 2.4 Watt
At 24 V DC: Power consumption = 100mA / 2.4 Watt
Audio Signal / Analog
Test (Service) Line:
Max. output current = 50 mA
Output Voltage Range max.
[0 V DC … +5V DC] to GND
Serial data interface: Serial interface RS-485 (9600 baud, 8 data bits, 1 stop bit, no parity, LSB sent
first)
2Very weak signals can considerably increase the time of response!

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7.2 Interface
External connection (Amphenol Connector, 6-pol. Amphenol plug, female, PTG06SE10-6S(SQ))
Fig 4) Connector Amphenol (PT07GS1)
RS-485 (9600 baud, 8 data bits, 1 stop bit, no parity, LSB sent first):
Pin A RS 485 A / +
Serial data connection Antenna Unit to DCU or any other Control Unit.
Max Voltage Range [0 V DC … +5V DC]
Pin B RS 485 B / - - II -
Audio/LF:
Pin C AMFM-NF
Audio signal / Analog Test (Service) line
Max. output current = 50 mA
Output Voltage Range max.
[0 V DC … +5V DC] to GND
Power Supply:
Pin D +10…+ 30 V DC Power Supply for Antenna Unit
Pin E +10…+ 30 V DC -II-
Pin F GND -II-

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7.3 Mechanical features
Temperature range:
•permissible operating temperature 3: -40 °C ... +60 °C
•permissible storage temperature: -55 °C ... +80 °C
Protective system: IP 67
Weight:ca. 1300 g
Dimensions: ∅270 mm x 182,4 mm
Fig 5) Mechanical Drawing (all dimensions in [mm])
3For temperatures lower than –10° C a warm-up period of 15 min should be allowed

Dir e cti o n Fi n d er R H O T H E T A R T -6 0 0 Li g ht
R H O T H E T A P a g e 1 9 of 2 2 U s er M a n u al
8 L e g al I nf or m ati o n
8. 1 L e g al Li mit ati o n s of U s e wit hi n t h e E U
D u e t o it s c o nf or m a n c e t o “ Dir e cti v e 2 0 1 4/ 5 3/ E U o n t h e h ar m o ni s ati o n of t h e l a w s of t h e M e m b er
St at e s r el ati n g t o t h e m a ki n g a v ail a bl e o n t h e m ar k et of r a di o e q ui p m e nt a n d r e p e ali n g Dir e cti v e
1 9 9 9/ 5/ E C”, d e cl ar e d i n t h e E U d e cl ar ati o n of c o nf or mit y, t h e e q ui p m e nt m a y b e u s e d wit hi n t h e
E ur o p e a n U ni o n wit h o ut li mit ati o n s r e g ar di n g t h e u s e of fr e q u e n ci e s i n t h o s e c o u ntri e s.
Pl e a s e al s o c o n si d er n ati o n al li mit ati o n s or r e q uir e m e nt s f or s p e ci al o p er ati o n al p er mi s si o n s i n y o ur
c o u ntr y .
8. 2 E U D e cl ar ati o n of C o nf or mit y
H er e b y, R H O T H E T A El e ktr o ni k G m b H d e c l ar e s t h at t h e pr o d u ct R T-6 0 0 Li g ht i s i n c o m pli a n c e wit h
t h e e s s e nti al r e q uir e m e nt s t o b e p ut o n t h e m ar k et, a n d wit h ot h er r el e v a nt pr o vi si o n s:
• Dir e cti v e 2 0 1 4/ 5 3/ E U r el ati n g t o r a di o e q ui p m e nt
• Dir e cti v e 2 0 1 1/ 6 5/ E U o n t h e r e stri cti o n of t h e u s e of c ert ai n h a z ar d o u s s u b st a n c e s i n el e ctri c al a n d
el e ctr o ni c e q ui p m e nt
A c o p y of t h e E U d e cl ar ati o n of c o nf or mit y i s a v ail a bl e at htt p:// w w w.r h ot h et a. c o m/
8. 3 Di s p o s al wit hi n t h e E ur o p e a n U ni o n
Pr o d u ct R e c y cli n g
 Pr o d u ct l a b eli n g i n a c c or d a n c e wit h E N 5 0 4 1 9
At t h e e n d of t h e lif e of t h e pr o d u ct, t hi s pr o d u ct m a y n ot b e di s p o s e d of wit h n or m al h o u s e h ol d w a st e .
E v e n di s p o s al vi a t h e m u ni ci p al c oll e cti o n p oi nt s f or el e ctri c al a n d el e ctr o ni c e q ui p m e nt i s n ot all o w e d.
T h e c orr e ct di s p o s al of t hi s pr o d u ct will h el p t o c o n s er v e r e s o ur c e s a n d pr e v e nt p ot e nti al n e g ati v e
eff e ct s o n t h e e n vir o n m e nt a n d h u m a n h e alt h w hi c h m a y o c c ur d u e t o i m pr o p er h a n dli n g of t h e
pr o d u ct.
• T h er ef or e, c arr y o ut t h e i n o p er ati v e d e vi c e, a n el e ctr o ni c s r e c y cli n g.
or
• T h e R H O T H E T A El e ktr o ni k G m b H t a k e s b a c k all it s pr o d u ct s, s u bj e ct t o r e d e m pti o n, i n
a c c or d a n c e wit h t h e r e q uir e m e nt s of t h e W E E E Dir e cti v e ( 2 0 1 2/ 1 9/ E U ) of t h e E ur o p e a n U ni o n
t o d eli v er it t o a pr of e s si o n al di s p o s al.
8. 4 Di s p o s al o ut si d e t h e E ur o p e a n U ni o n
F or pr o p er di s p o s al of u s e d el e ctr o ni c e q ui p m e nt i n a c c or d a n c e wit h t h e r e s p e cti v e n ati o n al
r e g ul ati o n s i n c o u ntri e s o ut si d e t h e E ur o p e a n U ni o n pl e a s e c h e c k it wit h y o ur d e al er or t h e l o c al
a ut h oriti e s .

Direction Finder RHOTHETA RT-600 Light
RHOTHETA Page 20 of 22 User Manual
9 Appendix
9.1 Frequency Ranges