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Rhotheta RT-1000 C User Manual

Vhf radio direction finder (vdf) system for atc and vts
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RHOTHETA Elektronik GmbH
User Manual RT-1000 C
[Rev 4.02.d]
User Manual
VHF Direction Finder System
RHOTHETA RT-1000 C

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Summary of Contents for Rhotheta RT-1000 C

  • Page 1 RHOTHETA Elektronik GmbH User Manual RT-1000 C [Rev 4.02.d] User Manual VHF Direction Finder System RHOTHETA RT-1000 C...
  • Page 2 RHOTHETA Elektronik GmbH User Manual RT-1000 C [Rev 4.02.d] Edited by: RHOTHETA Elektronik GmbH Kemmelpark Dr.-Ingeborg-Haeckel-Str. 2 82418 Murnau Germany Tel.: +49 8841 4879 - 0 Fax: +49 8841 4879 - 15 Internet: www.rhotheta.de E-Mail: email@rhotheta.de Copyright © RHOTHETA Elektronik GmbH All rights reserved Issue: 2017/05/17 [Rev 4.02.d]...

  • Page 3: General Information

    RHOTHETA Elektronik GmbH User Manual RT-1000 C [Rev 4.02.d] Section 1 General Information General Description, Characteristics, Flexible System Configuration, Bearing Display and Bearing Quality Analysis, Antenna System, Antenna Mast, Technical Data Section 2 Controller RTC 1100.A Section 3 Receiver Unit RTR 1200.A...

  • Page 4: Table Of Contents

    RHOTHETA Elektronik GmbH User Manual RT-1000 C [Rev 4.02.d] 1 GENERAL INFORMATION List of Contents: 1 GENERAL INFORMATION ............1.1 General Description ..................1.2 1.1.1 Options ..........................1.2 1.1.2 System Configuration .......................1.3 1.1.3 Subsystems ........................1.4 1.1.4 Block Diagram ........................1.5 Technical Data ....................1.6 1.2.1...

  • Page 5: General Description

    User Manual RT-1000 C [Rev 4.02.d] 1.1 General Description The direction finder system RT-1000 C is designed for ATC (air traffic control) and VTS (vessel traffic service) application. The system can be used in stationary and mobile applications. 1.1.1 Options...

  • Page 6: System Configuration

    RHOTHETA Elektronik GmbH User Manual RT-1000 C [Rev 4.02.d] 1.1.2 System Configuration System Configuration RT-1000 D F A n t e n n a R e c e i v e r U n i t C o n t r o l l e r RTA 1300.A...

  • Page 7: Subsystems

    RHOTHETA Elektronik GmbH User Manual RT-1000 C [Rev 4.02.d] 1.1.3 Subsystems Subsystems Designation File Reference Part No. RT-1000 Controller RTC 1100.A 12-9-2-0017-2-1 RTC-1100 A RT-1000 Receiver Unit RTR 1200.A 12-9-2-0018-2-1 RTR-1200 A RT-1000 Antenna RTA 1300.A 12-9-2-0019-2-1 RTA-1300 A - 1.4 -...

  • Page 8: Block Diagram

    RHOTHETA Elektronik GmbH User Manual RT-1000 C [Rev 4.02.d] 1.1.4 Block Diagram - 1.5 -...

  • Page 9: Technical Data

    RHOTHETA Elektronik GmbH User Manual RT-1000 C [Rev 4.02.d] 1.2 Technical Data 1.2.1 Basic Data Basic Data Parameter Condition Data DF method Doppler (3 kHz rotation frequency) Response time With sufficient signal strength ≤ 500 ms typ. ≤ 400 ms Minimum signal duration typ.

  • Page 10: Electrical Characteristic

    RHOTHETA Elektronik GmbH User Manual RT-1000 C [Rev 4.02.d] 1.2.2 Electrical Characteristic 1.2.2.1 System Characteristic System Properties Parameter Condition Limit Typical ≤ 2,5 µV/m 118,000 – 136,975 MHz, ≤ 5 µV/m ±2°bearing fluctuation ≤ 4 µV/m Bearing sensitivity ≤ 2,5 µV/m 156,000 –...

  • Page 11: Power Supply

    RHOTHETA Elektronik GmbH User Manual RT-1000 C [Rev 4.02.d] 1.2.2.2 Power Supply Technical Data Parameter Condition Data 115 / 230 V ±15 %; 47...63 Hz Power supply 24 V -10 % / +20 % Controller 15 VA Power consumption 15 VA (65 VA with heater (300...

  • Page 12: Mechanical Characteristics

    RHOTHETA Elektronik GmbH User Manual RT-1000 C [Rev 4.02.d] 1.2.3 Mechanical characteristics 1.2.3.1 Antenna RTA 1300.A Antenna RTA 1300.A with Antenna Mast RTA 1306.A DF antenna RTA 1300 with lightning rod and mast tube Antenna Mast RTA 1306.A antenna rotator for accuracy test Antenna can be folded down for maintenance ø40...

  • Page 13: Controller Rtc 1100

    RHOTHETA Elektronik GmbH User Manual RT-1000 C [Rev 4.02.d] 1.2.3.2 Controller RTC 1100.A Controller RTC 1100.A Mechanical Characteristis Subsystem Length Width Height Weight RT-1000 Controller RTC 1100.A 482,6 mm 377,7 mm 132,5 mm 7,4 kg The weight is valid for the Controller with remote operation mode.

  • Page 14: Receiver Unit Rtr 1200

    RHOTHETA Elektronik GmbH User Manual RT-1000 C [Rev 4.02.d] 1.2.3.3 Receiver Unit RTR 1200.A Receiver Unit RTR 1200.A Mechanical Characteristis Subsystem Length Width Height Weight 6,5 kg RT-1000 Receiver Unit RTR 1200.A 355,0 mm 236,7 mm 271 mm 7,6 kg...

  • Page 15: Environmental Conditions

    RHOTHETA Elektronik GmbH User Manual RT-1000 C [Rev 4.02.d] 1.2.4 Environmental Conditions 1.2.4.1 Antenna RTA 1300.A Environmental Conditions Parameter Data Wind load 150 km/h / 135 N (with constant wind speed) 180 km/h / 195 N allowed wind speed ≤ 240 km/h Operating temperature range -40°C…+80°C...

  • Page 16: Safety

    The manufacturer assumes no responsibility for the misuse of the product. The manufacturer is not liable beyond the scope of legal rules! This manual is part of the product RT-1000 C and is to keep during the lifetime and pass on to the product. 1.3.1...

  • Page 17: Basic Safety Notes

    Therefore, supply the device to an electronics recycling after the final taken out of service. Otherwise • RHOTHETA Elektronik GmbH takes back all products that are subject to the requirements of the WEEE Directive (2012/19/EU) of the European Union to supply these products to profes- sional disposal.
  • Page 18 RHOTHETA Elektronik GmbH User Manual RT-1000 C [Rev 4.02.d] 2 CONTROLLER RTC 1100.A List of Contents: 2 CONTROLLER RTC 1100.A ............2.1 Key to Front and Rear Views ................ 2.5 Preparation for Use ..................2.9 2.2.1 Grounding ..........................2.9 2.2.2 Mains Voltage ........................2.9 2.2.3...
  • Page 19 RHOTHETA Elektronik GmbH User Manual RT-1000 C [Rev 4.02.d] 2.3.6.2 Stopping Scanning....................2.28 2.3.7 Direct Recall of the Distress Frequency 121.500 MHz ..........2.28 2.3.8 North Adjustment ......................2.28 2.3.9 Selection of the reference directions QDM, QDR, QUJ und QTE .......2.29 2.3.10 Checking the Variation adjustment ................2.31 2.3.11...
  • Page 20 RHOTHETA Elektronik GmbH User Manual RT-1000 C [Rev 4.02.d] List of Figures: Figure 2-1 Front view .......................... 2.7 Figure 2-2 Rear view ........................... 2.8 Figure 2-3 Mains voltage selector ...................... 2.9 Figure 2-4 Mains power connection, mains fuse holder ..............2.10 Figure 2-5 Variations Adjustment ....................
  • Page 21 RHOTHETA Elektronik GmbH User Manual RT-1000 C [Rev 4.02.d] - 2.4 -...

  • Page 22: Key To Front And Rear Views

    RHOTHETA Elektronik GmbH User Manual RT-1000 C [Rev 4.02.d] 2.1 Key to Front and Rear Views All the position numbers refer to operating elements shown in the front and rear views (Figure 2-1 and Figure 2-2). Designation Function see Section DIM / ...
  • Page 23 RHOTHETA Elektronik GmbH User Manual RT-1000 C [Rev 4.02.d] Designation Function see Section Sync Control indication: synchronisation NOK 2.3.21 Sync Control indication: synchronisation. OK 2.3.21 Test plug R/L signal 2.3.23 DF-Signal 2 DF signal (filtered) 2.3.22 Connection jack for ground transmitter suppression 2.2.14...

  • Page 24: Figure 2-1 Front View

    RHOTHETA Elektronik GmbH User Manual RT-1000 C [Rev 4.02.d] Figure 2-1 Front view - 2.7 -...

  • Page 25: Figure 2-2 Rear View

    RHOTHETA Elektronik GmbH User Manual RT-1000 C [Rev 4.02.d] Figure 2-2 Rear view - 2.8 -...

  • Page 26: Preparation For Use

    RHOTHETA Elektronik GmbH User Manual RT-1000 C [Rev 4.02.d] 2.2 Preparation for Use 2.2.1 Grounding The RTC 1100 Controller housing is earthed by means of the grounding contact in the mains plug. At the rear of the housing there is a M6 grounding screw (35 Fig. 2-2). This should be used to make a low-impedance and low-inductivity connection between the unit and earth potential (system earth).

  • Page 27: Mains Fuse

    RHOTHETA Elektronik GmbH User Manual RT-1000 C [Rev 4.02.d] ATTENTION If the mains voltage selector is not set correctly, the unit may be damaged beyond repair. 2.2.3 Mains Fuse The mains fuses are contained in the mains power connection (40, Fig. 2-2). There is a separate fuse for phase and the neutral wire.

  • Page 28: Power Supply

    RHOTHETA Elektronik GmbH User Manual RT-1000 C [Rev 4.02.d] Fuse F1 inserted in the fuse holder (20, Fig 2-2) protects the unit during DC operation. Use a IEC 127 T 630 mA H / 250 V fuse. The supply voltage range for DC voltage is 24 V DC, with a permitted tolerance range of -10 / +20 %.

  • Page 29: Rack Mounting

    RHOTHETA Elektronik GmbH User Manual RT-1000 C [Rev 4.02.d] 2.2.7 Rack Mounting Use the adapters (supplied) to mount the RTC 1100.A Controller in 19" racks. NOTE If mounting in a rack, ensure that the permissible ambient temperature of 55°C is not exceeded. This is especially important if mounting together with other units which give off heat.

  • Page 30: Adjustment Using Rtm 1501 Dummy Antenna (Option)

    RHOTHETA Elektronik GmbH User Manual RT-1000 C [Rev 4.02.d] NOTE For the phase adjustment, it is important that the selection switch for reference direction (18, Fig. 2-1) is in position QDM and the North adjustment is 0°. NOTE The RT-1000 does not include a test transmitter for this purpose, so an external signal source or transmitter must be used.

  • Page 31: North Adjustment

    RHOTHETA Elektronik GmbH User Manual RT-1000 C [Rev 4.02.d] 2.2.10 North Adjustment The bearing display (QDM/QDR) is relative to magnetic north, under the condition that the antenna is mechanically adjusted towards magnetic north (see section 4, Antenna). Perform exact adjustment using the north adjustment of the controller. The correction value for north adjustment appears on the frequency display (8, Fig.

  • Page 32: Variation Adjustment

    RHOTHETA Elektronik GmbH User Manual RT-1000 C [Rev 4.02.d] If the squelch level is reduced to the value 00% and the key “-“ (29, Fig. 2-1) is pressed one more time, the display shows the character “PT” ( “PT” = Potentiometer) alternating with the squelch value, which is set by the manual squelch.

  • Page 33: Disable Selection Of Reference Direction

    RHOTHETA Elektronik GmbH User Manual RT-1000 C [Rev 4.02.d] 2.2.13 Disable Selection of Reference Direction There are applications where a change of reference direction from QDM to another direction is not allowed or makes no sense. For those cases, it is possible to disable the reference direction switch. If it is disabled, digital display (2, Fig.

  • Page 34: Ground Transmitter Suppression

    RHOTHETA Elektronik GmbH User Manual RT-1000 C [Rev 4.02.d] 2.2.14 Ground Transmitter Suppression If you do not want to measure the bearing to the ground transmitter, connect the PTT jack (27, Fig. 2- 2) on the rear of the unit with a normally-open contact of the transmit button. See Figure 2-7 for wiring diagram.
  • Page 35 RHOTHETA Elektronik GmbH User Manual RT-1000 C [Rev 4.02.d] The PTT contact is also available in the data interface “Data-Port” (22, Figure 2-2, s. also chapter 2.3.20). NOTE If the ground transmitter should be used as a test transmitter, so it is advisable to give the operator the ability to disable the ground transmitter by the opening function of a button.

  • Page 36: Display And Operating Functions

    RHOTHETA Elektronik GmbH User Manual RT-1000 C [Rev 4.02.d] Display and Operating Functions 2.3.1 Bearing Display and Bearing Quality Analysis The bearing is displayed on a luminous, 3-figure digital dis- DF Direction averaged play (2, Fig. 2-1) which may be...

  • Page 37: Repeat" Repetition Of Bearing Indication

    RHOTHETA Elektronik GmbH User Manual RT-1000 C [Rev 4.02.d] b) Functional check of the two LED rings (3; 4, Fig 2-1) “Frequency offset”, “error”: The LEDs of the circular bearing display (3; 4, Fig. 2-1) are illuminated cyclically as long the key “TEST”...

  • Page 38: Frequency Selection

    RHOTHETA Elektronik GmbH User Manual RT-1000 C [Rev 4.02.d] 2.3.4 Frequency Selection Depending on the chosen options, the following frequency ranges are available: VHF – air band 25 kHz frequency steps: 118.000 to 136.975 MHz VHF – air band 25 / 8.33 kHz frequency steps: 118.000 to 136.975 MHz VHF –...

  • Page 39: Direct Frequency Selection In The 8.33 / 25 Khz Channel Spacing

    RHOTHETA Elektronik GmbH User Manual RT-1000 C [Rev 4.02.d] 2.3.4.2 Direct Frequency Selection in the 8.33 / 25 kHz channel spacing If the system is equipped with the option 8.33 kHz channel spacing, the frequency input has to be per- formed according to ICAO Annex 10 Volume V clause 4.1.2.4 table 4.1.
  • Page 40 RHOTHETA Elektronik GmbH User Manual RT-1000 C [Rev 4.02.d] Frequency Setting / Channel Spacing Bandwidth Receiving Frequency -Display [MHz] [MHz] • • • • xxx,x00 25 kHz wide xxx,x000 xxx,x05 8,33 kHz narrow xxx,x000 xxx,x10 8,33 kHz narrow xxx,x833 xxx,x15...
  • Page 41 RHOTHETA Elektronik GmbH User Manual RT-1000 C [Rev 4.02.d] Example: Entering the operating frequency 118,975 MHz in the 8.33 kHz spacing Input frequency display (8, Fig. 2-1) _ _ _ . _ _ _ 1 _ _ . _ _ _ 1 1 _ .

  • Page 42: Recalling A Frequency Memory

    RHOTHETA Elektronik GmbH User Manual RT-1000 C [Rev 4.02.d] 2.3.4.3 Recalling a Frequency Memory Frequencies may be recalled from frequency memories 0 to 9 using the R (Recall) button and buttons 0 to 9 on the key pad for entering frequencies (13, Fig. 2-1). First, press the R button, followed by number 0 to 9 as required.

  • Page 43: Direct Selection Of Channel Number In Maritime Radio Communication

    RHOTHETA Elektronik GmbH User Manual RT-1000 C [Rev 4.02.d] 2.3.5 Direct Selection of Channel Number in Maritime Radio Communication Channel number ranges in duplex operation: 01 to 07, 18 to 28, 60 to 66 and 78 to 88 simplex operation: 08 to 17 and 67 to 77 For direct channel number selection (for maritime radio communication only), use the bottom “C”...

  • Page 44: Scanning

    RHOTHETA Elektronik GmbH User Manual RT-1000 C [Rev 4.02.d] Example: Input of channel number 16 (reception of a simplex channel) Eingabe Anzeige Kanal-Display (8, Fig. 2-1) If the channel number is not entered correctly within 10 seconds, the controller switches back to the last frequency or channel set.

  • Page 45: Stopping Scanning

    RHOTHETA Elektronik GmbH User Manual RT-1000 C [Rev 4.02.d] If you wish to continue scanning although a signal is being received, press the relevant scan mode key and keep pressing until a new frequency is set. Example: In UP scanning, a signal is being received at 125.000 MHz and scanning stops. If you still wish to continue UP scanning, press key “UP”...

  • Page 46: Selection Of The Reference Directions Qdm, Qdr, Quj Und Qte

    RHOTHETA Elektronik GmbH User Manual RT-1000 C [Rev 4.02.d] 2.3.9 Selection of the reference directions QDM, QDR, QUJ und QTE By use of the reference direction switch (18, Fig. 2-1), the reference directions QDM, QDR, QUJ and QTE can be displayed on the digital bearing display. The selected reference direction is shown at the reference display (17, Fig.
  • Page 47 RHOTHETA Elektronik GmbH User Manual RT-1000 C [Rev 4.02.d] The interrelation will be shown in the following Figure: The picture shows the variation of 15°W. Then the variation value is -15° acronym meaning True north Magnetic North ATTENTION Only forward QDM bearings to an aircraft pilot. Other reference directions will cause a significant danger of confusion! - 2.30 -...

  • Page 48: Checking The Variation Adjustment

    RHOTHETA Elektronik GmbH User Manual RT-1000 C [Rev 4.02.d] 2.3.10 Checking the Variation adjustment After switching on the Controller Unit, the test routine will start. The reference display (17, Fig. 2-1) shows “VAR“ for variation. At the end of the test routine, the adjusted value for the variation is shown on the digital bearing display (2, Fig.

  • Page 49: Dimmer (1) "Dim

    RHOTHETA Elektronik GmbH User Manual RT-1000 C [Rev 4.02.d] 2.3.13 Dimmer (1) "DIM" The dimmer (1, Fig. 2-1) is used to change the brightness of the QDM display (2, Fig. 2-1), circle of bearing display (3, Fig. 2-1), circle of "live" bearing display (4, Fig. 2-1), error display (6, Fig. 2-1) and frequency deviation display (5, Fig.

  • Page 50: Line" Mains Switch (19)

    RHOTHETA Elektronik GmbH User Manual RT-1000 C [Rev 4.02.d] 2.3.18 "Line" Mains Switch (19) Mains switch (19, Fig. 2-2) provides a double-pole disconnection of the power supply module from the mains. The DC power supply is not affected, which means that, with the switch in the "OFF"-position, the power supply module is switched to the DC power input.
  • Page 51 RHOTHETA Elektronik GmbH User Manual RT-1000 C [Rev 4.02.d] D-sub-jack 25-way Plug wiring: Signal Meaning NF 2 AF audio signal (floating) PHI-1 Bearing signal 1 PHI-2 Bearing signal 2 PHI-2 Bearing signal 2 Data-1 Data communication line 1 Data-1 Data communication line 1...

  • Page 52: Sync" Synchronisation Indicators (23, 24)

    RHOTHETA Elektronik GmbH User Manual RT-1000 C [Rev 4.02.d] 2.3.21 "Sync" Synchronisation Indicators (23, 24) The green indicator (24, Fig. 2-2) lights up if, in the controller, the electronics in the Frequency Pro- cessing module RTC 1107 is synchronised with the reference signal from the Antenna Control module RTR 1201.

  • Page 53: Serial Port" Serial Interface (30)

    RHOTHETA Elektronik GmbH User Manual RT-1000 C [Rev 4.02.d] 2.3.24 "Serial Port" Serial Interface (30) The serial interface (30, Fig. 2-2) enables the transfer of bearing data to an external control unit and also permits remote control by an external control unit.

  • Page 54: Data Output

    RHOTHETA Elektronik GmbH User Manual RT-1000 C [Rev 4.02.d] 2.3.24.1 Data Output The data output is continuous, i.e. no control by means of a handshake signal or control characters is necessary. Message Header Content „Average“ bearing X X X [CR][LF] 0°...
  • Page 55 RHOTHETA Elektronik GmbH User Manual RT-1000 C [Rev 4.02.d] Timing und priority of cyclic data output Message „Average“ bearing approx. every 0,25 sec The first bearing value (after start of signal) will be transmitted immediately. Without signal, no average value will be transmitted.

  • Page 56: Data Input

    RHOTHETA Elektronik GmbH User Manual RT-1000 C [Rev 4.02.d] 2.3.24.2 Data Input All received data are checked for correct syntax and plausibility referring to the actual unit setting. All received data are also checked for compliance with the limiting values. The data input is monitored over a time-out of 100 ms, i.e.
  • Page 57 RHOTHETA Elektronik GmbH User Manual RT-1000 C [Rev 4.02.d] The following example shows the data sequence for the frequency command (set new frequency 125,375 MHz) F 1 2 5 3 7 5 [CR][LF] │ │ │ │ │ │ │...
  • Page 58 RHOTHETA Elektronik GmbH User Manual RT-1000 C [Rev 4.02.d] Example of frequency change Data In/Output: Frequency-change to 133,400 MHz (with 8.33 kHz ICAO grid) using a data input message. „Fxxxxxx[CR][LF]“ Remark: After valid data input, the new changed frequency will be transmitted immediately.

  • Page 59: Ser. Port" Plug Wiring (30)

    RHOTHETA Elektronik GmbH User Manual RT-1000 C [Rev 4.02.d] 2.3.24.3 Technical Data Data format: ASCII-8-Bit (7 data bits + 1 parity bit) (ASCII-II-character format) Stop bit: Parity: Baud rate: 1200 Mode: asynchronous Level: RS-232 High: +3 V to +15 V...

  • Page 60: Connection To A Data Terminal Or Data Transmission Device

    RHOTHETA Elektronik GmbH User Manual RT-1000 C [Rev 4.02.d] 2.3.24.5 Connection to a Data Terminal or Data Transmission Device Controller Data terminal or data RTC 1000 transmission device The pin numbering of the data terminal device connector applies for most PCs with 9-way D-Sub con- nectors.

  • Page 61: Compatibility Mode

    RHOTHETA Elektronik GmbH User Manual RT-1000 C [Rev 4.02.d] 2.3.24.6 Compatibility mode It is possible to select a compatibility mode for the serial interface. This can be useful if the interface is connected to already existing applications which cannot handle the new messages of the data output (RT-1000 system revisions of [Rev 4.00.00] or higher).

  • Page 62: Timing Sequence

    RHOTHETA Elektronik GmbH User Manual RT-1000 C [Rev 4.02.d] 2.3.25.1 Timing Sequence not valid valid not valid D9-OUT not valid valid not valid D0 .. D8-OUT STR1 - 2.45 -...

  • Page 63: Installation Dimensions

    RHOTHETA Elektronik GmbH User Manual RT-1000 C [Rev 4.02.d] 2.4 Installation Dimensions - 2.46 -...
  • Page 64 RHOTHETA Elektronik GmbH User Manual RT-1000 C [Rev 4.02.d] Mounting Cut-out 465.1 - 2.47 -...
  • Page 65 RHOTHETA Elektronik GmbH User Manual RT-1000 C [Rev 4.02.d] 3 RECEIVER UNIT RTR 1200.A List of Contents: 3 RECEIVER UNIT RTR 1200.A ............3.1 Front View of Receiver Unit ................3.3 Preparation for Use ..................3.7 3.2.1 Grounding ..........................3.7 3.2.2 Setting the Mains Voltage ....................3.7...
  • Page 66 RHOTHETA Elektronik GmbH User Manual RT-1000 C [Rev 4.02.d] List of Figures: Figure 3-1 Front view of receiver unit ....................3.5 Figure 3-2 Front view additional bearing receiver (option “Second DF Channel RTR 1245”) ....3.6 Figure 3-3 Mains voltage selector ......................3.7 Figure 3-4 Antenna Connection ......................

  • Page 67: Front View Of Receiver Unit

    RHOTHETA Elektronik GmbH User Manual RT-1000 C [Rev 4.02.d] 3.1 Front View of Receiver Unit Designation Significance see section 1401 Power supply module Antenna control Plug for connection of dummy antenna 3.3.2.9 R/L Off Test button (R/L off) 3.3.2.8 1201...
  • Page 68 RHOTHETA Elektronik GmbH User Manual RT-1000 C [Rev 4.02.d] Designation Significance see section Mains power cable Mains power cable bushing Earth connection screw 3.2.6 Power Select Mains voltage selector 3.2.2 115/230V Power supply control lamp 3.3.2.2 +5V,+15V,-15V 1204 / 1205...
  • Page 69 RHOTHETA Elektronik GmbH User Manual RT-1000 C [Rev 4.02.d] Figure 3-1 Front view of receiver unit - 3.5 -...
  • Page 70 RHOTHETA Elektronik GmbH User Manual RT-1000 C [Rev 4.02.d] Figure 3-2 Front view additional bearing receiver (option “Second DF Channel RTR 1245”) - 3.6 -...

  • Page 71: Preparation For Use

    RHOTHETA Elektronik GmbH User Manual RT-1000 C [Rev 4.02.d] 3.2 Preparation for Use 3.2.1 Grounding The housing of the Receiver Unit RTR 1200.A has to be grounded via the grounding bolt (M6) (35, Fig. 3-1). This connection has to be low-resistance and low-inductivity. The antenna has to be connected to the same ground as the Antenna Unit and its mast construction.

  • Page 72: Mains Fuses

    RHOTHETA Elektronik GmbH User Manual RT-1000 C [Rev 4.02.d] In addition, make sure mains voltage fuses F2 (31, Fig. 3-1) and F3 (30, Fig. 3-1) are set correctly for mains voltage range selected (see section 3.2.3). ATTENTION If the mains voltage selector is not set correctly, the unit may be de- stroyed 3.2.3...

  • Page 73: Dc Fuse

    RHOTHETA Elektronik GmbH User Manual RT-1000 C [Rev 4.02.d] Allocation of terminals: Terminal Designation No. DC voltage source X3.1 +24V BAT Positive pole: +24 VDC X3.2 -24V BAT Negative pole 0 V earth 3.2.5 DC Fuse The DC voltage input is protected by fuse F5 (27, Fig. 3-1).

  • Page 74: Connection Of Rta 1300.A Direction Finder Antenna

    RHOTHETA Elektronik GmbH User Manual RT-1000 C [Rev 4.02.d] 3.2.6 Connection of RTA 1300.A Direction Finder Antenna The RTA 1300.A Direction Finder Antenna Direction Finder Receiver Unit Antenna is connected to the receiver unit through a RTR 1200 RTA 1300 RF and a control cable.

  • Page 75: Controller / Receiver Unit Data Connection

    RHOTHETA Elektronik GmbH User Manual RT-1000 C [Rev 4.02.d] 3.2.7 Controller / Receiver Unit Data Connection The RTR 1200 Receiver Unit is connected to the controller via a communications cable with three pairs of wires. This cable is used to transmit the bearing signal, a reference signal, the AF (audio) signal and data signals for receiver control and errors signalling.

  • Page 76: Setting The Receiver

    RHOTHETA Elektronik GmbH User Manual RT-1000 C [Rev 4.02.d] Connection plan fort data cable additional bearing channel (option) Terminal Block Receiver Unit Signal D-Sub-plug X11;X12;X13; (41, Fig. 3-2) 2. Controller Terminal Name Terminal No. X 11.1 48 kHz-1B 48 kHz-2 10;...

  • Page 77: Using The Rtr 1200.A Receiver Unit

    RHOTHETA Elektronik GmbH User Manual RT-1000 C [Rev 4.02.d] 3.3 Using the RTR 1200.A Receiver Unit Once all checks listed in section 3.2 have been carried out, the receiver unit can be used. 3.3.1 Switching on the Receiver Unit The receiver unit is switched on by plugging the mains cable into the mains.

  • Page 78: Power Supply "Ok" Control Lamp

    RHOTHETA Elektronik GmbH User Manual RT-1000 C [Rev 4.02.d] 3.3.2.2 Power Supply “OK” Control Lamp After switching on, the green control lamps (37 and 10, Fig. 3-1) of the Power Supply module RTX 1400 (1, Fig. 3-1) and of the receiver RTR 1204 (8, Fig. 3-1), light up. This shows that the power sup- ply module is functioning correctly.

  • Page 79: R/L Off Button

    RHOTHETA Elektronik GmbH User Manual RT-1000 C [Rev 4.02.d] 3.3.2.8 R/L OFF Button The R/L OFF button (3, Fig. 3-1) interrupts the right/left antenna rotation control. If this button is pressed and a received signal is present, the value 000° or 180°+ north adjustment (set on the control- ler) appears on the QDM display of the controller (2, Fig.

  • Page 80: Switch "Sql (Level) / Frequency / Qdr" (17)

    RHOTHETA Elektronik GmbH User Manual RT-1000 C [Rev 4.02.d] 3.3.2.10.2 Switch “Sql (Level) / Frequency / QDR” (17) Standard position of the toggle switch “Sql (level) / Frequency / QDR” (17, Fig. 3-1) is “Frequency”. The display (12, Fig. 3-1) shows the actual frequency. In position “Level”, the display shows the signal level (0..99 %, not calibrated).

  • Page 81: Manual Squelch Adjustment Potentiometer (18)

    RHOTHETA Elektronik GmbH User Manual RT-1000 C [Rev 4.02.d] 3.3.2.10.4 Key “Band” (16) In the local mode, it is possible to toggle between the air band and the maritime band by pressing the key “Band” (16, Fig. 3-1). NOTE If the switch (17, Fig 3-1) is in the position “Sql (level), the antenna rotation is stopped while pressing the key “Band”...

  • Page 82: Installation Dimensions

    RHOTHETA Elektronik GmbH User Manual RT-1000 C [Rev 4.02.d] 3.4 Installation Dimensions - 3.18 -...
  • Page 83 RHOTHETA Elektronik GmbH User Manual RT-1000 C [Rev 4.02.d] 4 DIRECTION FINDER ANTENNA RTA-1300.A List of Content 4 DIRECTION FINDER ANTENNA RTA-1300.A ....... 4.1 Installation ...................... 4.3 4.1.1 General ..........................4.3 4.1.2 Reflections and their influence to the bearing result ............4.3 4.1.3...
  • Page 84 RHOTHETA Elektronik GmbH User Manual RT-1000 C [Rev 4.02.d] List of Figures Fig. 4-1 Free-space propagation of radio waves Fig. 4-2 Field of lines of equal phase relations for two coherent waves Fig. 4-3 Reflected path distance and direct path distance of the radio wave Fig.

  • Page 85: Installation

    The achievable bearing accuracy largely depends on the physical conditions at the antenna location. The remote concept of the RT-1000 C direction finder system separates the antenna and the high frequency components (Antenna RTA 1300.A, Receiver Unit RTR 1200.A) from the controller (Control- ler RTC 1100A) side performing the signal processing.
  • Page 86 RHOTHETA Elektronik GmbH User Manual RT-1000 C [Rev 4.02.d] degree Dipol Di pol Transmi tter Recei ver = wave lengt h f or v = c v = probagat ion veloci ty c = li ght speed Transmit ter Receiver I sophase Fig.
  • Page 87 RHOTHETA Elektronik GmbH User Manual RT-1000 C [Rev 4.02.d] Accordingly, the propagation characteristics of radio waves of a wavelength of approximately λ < 10 m increasingly resembles those of light. At a wavelength of 1 m to 3 m, wave propagation requires a direct path and if this is not available, only reflected waves are received.
  • Page 88 RHOTHETA Elektronik GmbH User Manual RT-1000 C [Rev 4.02.d] As shown in Figure 4-2, in the case of wide-aperture direction finders, this movement causes slight azimuth oscillations. In contrary, this oscillation is larger in the case of compact direction finders - the series of small circles in Figure 4-2.

  • Page 89: Influence Of Ground Reflections To The Df Accuracy

    RHOTHETA Elektronik GmbH User Manual RT-1000 C [Rev 4.02.d] 4.1.3 Influence of ground reflections to the DF accuracy The signal transmitted by an aircraft transmitter will reach the DF antenna on the direct way. Additional- ly, a part of the signal will be reflected at the ground and will reach the antenna as well. Depending on the angle of incidence and the height at which the DF antenna is located above the ground, the direct signal and the reflected signal have to propagate over different distances.
  • Page 90 RHOTHETA Elektronik GmbH User Manual RT-1000 C [Rev 4.02.d] Ve r t i ka l D i agr am fo r h = 2 3 m Ver t i ka l D i ag r am f or h = 3, 5 m Fig.
  • Page 91 (see Fig 4-6). If the antenna is mounted on the RHOTHETA antenna mast RT-1306, the antenna head is about 4 Meters above the ground. The 1. zero point will be in an elevation of approx. 17°above the horizon.
  • Page 92 RHOTHETA Elektronik GmbH User Manual RT-1000 C [Rev 4.02.d] Maximum Mi nimum Mini mum Maximum Min imu m Maximum Mini mum Minimum DF Antenna Fig. 4-6 Influence of ground reflection to the bearing result - 4.10 -...
  • Page 93 GPS bearing to the DF side. Here, both bearings can be com- pared. RHOTHETA can support you with an automatic test recording system in this case. During the radial flights, the aeroplane flies across the direction finder from various directions to find out detrimental ground reflections and the cone of silence, the area above the direction finder where no usable information can be obtained from the direction finder.

  • Page 94: Notes On Fig. 4-8 / 4-9, Rta 1300.A Direction Finder Antenna

    RHOTHETA Elektronik GmbH User Manual RT-1000 C [Rev. 4.02.d] 4.2 Notes on Fig. 4-8 / 4-9, RTA 1300.A Direction Finder Antenna Designation Function Lightning conductor rod Radiator cover Radiator Clamping nut Radiator flange Antenna head North dipole label Mast tube...
  • Page 95 RHOTHETA Elektronik GmbH User Manual RT-1000 C [Rev. 4.02.d] Fig. 4-8 RTA 1300.A Direction Finder Antenna - 4.13 -...
  • Page 96 RHOTHETA Elektronik GmbH User Manual RT-1000 C [Rev. 4.02.d] Fig. 4-9 RTA 1300.A Direction Finder Antenna (bottom view) - 4.14 -...

  • Page 97: Assembly Instructions

    RHOTHETA Elektronik GmbH User Manual RT-1000 C [Rev. 4.02.d] 4.3 Assembly Instructions Fit O-ring on mast tube. (see Figure 4-10). Pull antenna cable through mast tube. O-ring Connect RF cable. Screw cord grip fixing to clamp RF cable. Plug the control cable into the connection board: Using pointed flat-nose pliers, grip the flat plug covers and push fully onto the flat plugs.
  • Page 98 RHOTHETA Elektronik GmbH User Manual RT-1000 C [Rev. 4.02.d] Apply a thin coat of grease to the antenna head / mast tube contact faces. Screw antenna head onto mast tube. Fit O-ring to lightning conductor rod (see Fig. 4-10). Apply thin coat of grease to antenna head / lightning con- ductor rod contact faces.
  • Page 99 LED-based obstacle lights should not be used. LED-based obstacle lights may disturb the reception of the DF system due to the integrated power supply. The use of the RHOTHETA obstacle light as defined in the op- tions list will prevent such problems. - 4.17 -...

  • Page 100: North Alignment Of The Direction Finder Antenna And Determining The System Accuracy At The Installation Site

    RHOTHETA Elektronik GmbH User Manual RT-1000 C [Rev. 4.02.d] 4.4 North Alignment of the Direction Finder Antenna and Determining the System Accuracy at the Installation Site The north alignment is used to harmonize the angle determined by the direction finder with the actual (magnetic) north-related azimuth values.

  • Page 101: Flight Checking For Exact North Alignment And Determining The System Accuracy At The Installation Site

    (set the north adjustment to zero). The actual bearing value (QDR) is also shown at the display on the Receiver unit RTR 1200.A (RT-1000 C only). The display is located on the module RTR 1205. In this case, correcting the antenna setting by rotating clockwise (viewed from above, the single dipole moves in the north -- east -- south -- west direction) reduces the indicated QDM value, a counter-clockwise rotation causes an increase.

  • Page 102: Determining The Position Using A Theodolite

    RHOTHETA Elektronik GmbH User Manual RT-1000 C [Rev. 4.02.d] NOTE If the communication system of the aircraft is used as a transmitter, check beforehand whether it is suitable for continuous operation. The radius of the circle and the flight speed shall be selected such that the "lag error" effect when de- termining the bearing is negligibly low.

  • Page 103: Simplified Method

    RHOTHETA Elektronik GmbH User Manual RT-1000 C [Rev. 4.02.d] 4.4.2.3 Simplified Method If no theodolite or GPS receiver is available, a simplified measuring procedure must be used at the actual antenna installation site to precisely north align the system and determine its accuracy.
  • Page 104 RHOTHETA Elektronik GmbH User Manual RT-1000 C [Rev. 4.02.d] Where there is correct reception without reflections the bearing signal appears as shown in Figure 4-14. Both blocks, clockwise and counter-clockwise rotation, have the same amplitudes. The envelope curve of the oscillation increases steadily (in accordance with an e-function) and has no "dips".
  • Page 105 RHOTHETA Elektronik GmbH User Manual RT-1000 C [Rev. 4.02.d] Fig. 4-15 DF signal 2 and R/L signal with a modulated reception signal DF signal R/L signal The direction finding signal is very noisy. Possible causes: The field strength of the transmission signal is too low.
  • Page 106 RHOTHETA Elektronik GmbH User Manual RT-1000 C [Rev. 4.02.d] Amplitudes of clockwise rotation blocks or counter-clockwise rotation blocks "pump" The amplitudes of the clockwise rotation blocks and counter-clockwise rotation blocks are different Possible causes: Effect of reflection Extreme flight manoeuvres of the calibration aircraft...

  • Page 107: Evaluation Of Qdr Live Display (Yellow Light Dot Circle)

    RHOTHETA Elektronik GmbH User Manual RT-1000 C [Rev. 4.02.d] 4.4.3.2 Evaluation of QDR Live Display (Yellow Light Dot Circle) The QDR live display (yellow light dot circle; 4, Fig. 2-1) serves as a further criterion of the quality of the direction finding (including during every day operation).

  • Page 108: Evaluation Of Measuring Results

    RHOTHETA Elektronik GmbH User Manual RT-1000 C [Rev. 4.02.d] 4.4.3.3 Evaluation of Measuring Results The deviations between the desired and actual values are entered in the test record compiled with the aid of the flight check. If in the case of a calibration aircraft the direction finding signal or the yellow light dot indication is evaluated, the observations made at the corresponding measured values are to be annotated.

  • Page 109: Determining The North Correction

    RHOTHETA Elektronik GmbH User Manual RT-1000 C [Rev. 4.02.d] 320° 319° -1° 330° 330° ±0° 340° 343° +3° 350° 351° -1° In the example, larger deviations occur when measuring for the 20°, 110° and 210° desired values. As can be seen by the evaluation of the direction finding signal and the yellow light dot circle, they are due to shadowing of the transmitter and reflections.

  • Page 110: Installation Dimensions

    RHOTHETA Elektronik GmbH User Manual RT-1000 C [Rev. 4.02.d] 4.5 Installation Dimensions RTA 1300.A Direction Finding Antenna Mast pole with mast pole and lightning conductor rod ø 4 0 - 4.28 -...
  • Page 111 List of Contents: 5 APPENDIX..................5.1 EU Declaration of Conformity ............... 5.2 Approval / Authorization of the direction finder RT-1000 C as a system in air traffic management ................... 5.2 5.2.1 Approval in the Federal Republic of Germany / EU ............5.2 5.2.2...

  • Page 112: Eu Declaration Of Conformity

    5.2.1 Approval in the Federal Republic of Germany / EU The approval of the system RT-1000 C is carried out in Germany according to the FSMusterzulV (air traffic control systems and equipment Pattern Approval Regulation). NOTE This Regulation determines the requirements for type certification of equipment for air traffic control and lays down the procedure of the type certificate.

  • Page 113: Ec Declaration Of Suitability For Use

    EC Declaration of Suitability for Use In accordance with the interoperability Regulation (EC) No. 552/2004 RHOTHETA provides an EC declaration of suitability for use for the components of the DF-system RT-1000 C (Component for air traffic management). The EC declaration of suitability for use is the formal statement of RHOTHETA Elektronik GmbH that the components, in this case, the DF Antenna RTA 1300.A, the receiving unit RTR 1200.A and the...

  • Page 114: Rt-1000 C As Air Traffic Management System - Approval Within The

    RT-1000 C as air traffic management system - approval within the EU In the European Union the RT-1000 C may be provided as a system for air traffic management at the service, only if it has been tested for compliance with the essential requirements and relevant imple- menting rules for interoperability and if it complies.

  • Page 115: Interwiring Of The Direction Finder Rt 1000 C

    RHOTHETA Elektronik GmbH User Manual RT-1000 C [Rev 4.02.d] 5.3 Interwiring of the Direction Finder RT 1000 C Di recti on Fi nder Antenna RTA 1300A 6 x Fl at BNC- cabl e pl ug j ack Antenna cabl e...

  • Page 116: Interwiring Oft He Direction Finder Rt 1000 C / 2 Channels

    RHOTHETA Elektronik GmbH User Manual RT-1000 C [Rev 4.02.d] 5.4 Interwiring oft he Direction Finder RT 1000 C / 2 Channels Direction Finder Antenna RTA 1300A 6 x F l a t BN C - c ab l e pl u g...

  • Page 117: Correlation Channel Number / Frequency In The Maritime Radio Band

    RHOTHETA Elektronik GmbH User Manual RT-1000 C [Rev 4.02.d] Correlation channel number / frequency in the maritime radio band Channel No. Frequency (sea side station) Frequency (coast station) 156,050 MHz 160,650 MHz 156,100 MHz 160,700 MHz 156,150 MHz 160,750 MHz...
  • Page 118 RHOTHETA Elektronik GmbH User Manual RT-1000 C [Rev 4.02.d] 156,575 MHz 156,625 MHz 156,675 MHz 156,725 MHz 156,775 MHz 156,825 MHz 156,875 MHz 156,925 MHz 161,525 MHz 156,975 MHz 161,575 MHz 157,025 MHz 161,625 MHz 157,075 MHz 161,675 MHz 157,125 MHz...

  • Page 119: Test Record / Df Final Test Report

    For this purpose, RHOTHETA uses a fully automatized test stand. The result of each test is recorded in a test report “DF Final Test Report”. To each direction finder system RT-1000 C, the test protocol is en- closed at delivery.

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