Rhotheta RT-1000 User manual

RT-1000 Multichannel
Maintenance Manual

RT-1000 MC Maintenance Manual
RHOTHETA Page 2 of 20 Maintenance Manual
Edited by:
RHOTHETA Elektronik GmbH
Kemmelpark
Dr.-Ingeborg-Haeckel-Str. 2
82418 Murnau
Germany
Tel.: [phone] - 0
Fax: [phone] - 15
Internet: www.rhotheta.de
E-Mail: [email protected]
Copyright © RHOTHETA Elektronik GmbH
All rights reserved
-Issue: 2016/11/07 [Rev 1.03.a]
-Document-ID: 12-9-1-0015-3-6-60
Note
The manufacturer reserve the right to make modifications at any time and without previous
information of the here described product.

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Content
1 General Information.........................................................................................................4
2 Indoor Tests.....................................................................................................................5
2.1 AC Power Supply....................................................................................................................................5
2.2 DC Power Supply ...................................................................................................................................6
2.3 RF-Splitter...............................................................................................................................................8
2.4 DF-Channels...........................................................................................................................................9
2.4.1 Display and Control Elements ...................................................................................................9
2.4.2 Phase Adjust............................................................................................................................10
2.4.3 Frequency Offset Test.............................................................................................................11
2.4.4 Level Check.............................................................................................................................13
2.4.5 Squelch Check.........................................................................................................................14
2.4.6 Bearing Check .........................................................................................................................15
2.5 System Status Check ...........................................................................................................................16
2.5.1 Status.......................................................................................................................................16
2.5.2 Error and Warning Simulation..................................................................................................16
2.6 UPS Duration Test................................................................................................................................17
3 Outdoor Test..................................................................................................................17
3.1 Bearing Test with Antenna Mast...........................................................................................................18
3.2 Bearing Test without Mast....................................................................................................................19
3.3 Bearing Check with the Tower Signal...................................................................................................19
4 Notes...............................................................................................................................20

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1 General Information
This document represents the maintenance manual of the RT-1000 Multichannel DF-System.
All tests described in this document are recommended to be performed annually in order to
proof the correct functionality of the DF-System.
All tests should be performed by the personnel, which have been educated on the RT-1000
DF-System or have other appropriate knowledge.
Necessary Measurement Equipment:
-RMS Voltmeter
-RF-Generator
-Spectrum Analyzer
-Antenna Modell (RHOTHETA RTM 1501)
-RF Cable min. 1,5m BNC male to BNC male
-2 RF Cable min. 1,5m BNC male to SMB female
-Portable ATC RF-Transmitter with output power of min. 0.5 W
Applicable Documents:
-User Manual
-System Connection Plan
Note 1:
All connector names refer to the system connection plan, which is delivered with the DF-
System.
Note 2:
All used measurement equipment should be calibrated and have not expired date of
calibration.

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2 Indoor Tests
2.1 AC Power Supply
Test procedure:
Measure the input supply voltage in the supply socket with a RMS Voltmeter.
TC.Nr. TC. Name Test point Limits Result Passed
[TC 010.10] AC Supply Input (UPS) Supply
Socket 230V
rms
±15% OK
Measurement
Equipment: RMS Voltmeter
Test procedure:
Switch ON
the main supply switch S1 and measure the 230V
AC,rms
at the internal connection
panel from X80 to X90 with the RMS Voltmeter.
TC.Nr. TC. Name Test point Limits Result Passed
[TC 010.30] AC Supply
Internal Connection Panel X80-X90 230V
rms
±15% OK
Measurement
Equipment: RMS Voltmeter
Test procedure:
Switch on the UPS if a UPS is installed.
Measure the voltage from X1 to X2 with the RMS Voltmeter.
TC.Nr. TC. Name Test point Limits Result Passed
[TC 010.20] AC Supply
With input Supply X1, X2 230V
rms
±15% OK
Measurement
Equipment: RMS Voltmeter

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2.2 DC Power Supply
Test procedure:
Switch on the DC Power Supply (KEPCO-POWER-SUPPLY +5 V, +15V, -15V).
Measure the DC Voltage on DC Power Supply’s front panel test points with a RMS Voltmeter.
TC.Nr. TC. Name Test point Limits Result Passed
[TC 020.11] DF-Channel DC Supply
DC Power Supply (KEPCO 5 V)
+Test Points-
(KEPCO
Front panel) 5,0…5,25 V
DC
OK
[TC 020.12] DF-Channel DC Supply
DC Power Supply (KEPCO 15 V)
+Test Points-
(KEPCO
Front panel) 14,75…15,25 V
DC
OK
[TC 020.13] DF-Channel DC Supply
DC Power Supply (KEPCO 15 V)
+Test Points-
(KEPCO
Front panel) 14,75…15,25 V
DC
OK
[TC 020.14] DF-Channel DC Supply
DC Power Supply (KEPCO 15 V)
+Test Points-
(KEPCO
Front panel) 14,75…15,25 V
DC
OK
Measurement
Equipment: RMS Voltmeter

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Test procedure:
Measure the DC Voltage with a RMS Voltmeter on one of the DF-Channels from TP16 to GND,
TP15 to GND, TP14 to GND
TC.Nr. TC. Name Test
point Limits Result Passed
[TC 020.20]
DF-Channel 1
+5 V TP16 +5,0…+5,25 V
DC
OK
[TC 020.21] +15 V TP15 +14,75…+15,25 V
DC
OK
[TC 020.22] -15 V TP14 -14,75…-15,25 V
DC
OK
[TC 020.23]
DF-Channel 2
+5 V TP16 +5,0…+5,25 V
DC
OK
[TC 020.24] +15 V TP15 +14,75…+15,25 V
DC
OK
[TC 020.25] -15 V TP14 -14,75…-15,25 V
DC
OK
[TC 020.26]
DF-Channel 3
+5 V TP16 +5,0…+5,25 V
DC
OK
[TC 020.27] +15 V TP15 +14,75…+15,25 V
DC
OK
[TC 020.28] -15 V TP14 -14,75…-15,25 V
DC
OK
[TC 020.29]
DF-Channel 4
+5 V TP16 +5,0…+5,25 V
DC
OK
[TC 020.30] +15 V TP15 +14,75…+15,25 V
DC
OK
[TC 020.31] -15 V TP14 -14,75…-15,25 V
DC
OK
[TC 020.32]
DF-Channel 5
+5 V TP16 +5,0…+5,25 V
DC
OK
[TC 020.33] +15 V TP15 +14,75…+15,25 V
DC
OK
[TC 020.34] -15 V TP14 -14,75…-15,25 V
DC
OK
[TC 020.35]
DF-Channel 6
+5 V TP16 +5,0…+5,25 V
DC
OK
[TC 020.36] +15 V TP15 +14,75…+15,25 V
DC
OK
[TC 020.37] -15 V TP14 -14,75…-15,25 V
DC
OK
[TC 020.38]
DF-Channel 7
+5 V TP16 +5,0…+5,25 V
DC
OK
[TC 020.39] +15 V TP15 +14,75…+15,25 V
DC
OK
[TC 020.40] -15 V TP14 -14,75…-15,25 V
DC
OK
[TC 020.41]
DF-Channel 8
+5 V TP16 +5,0…+5,25 V
DC
OK
[TC 020.42] +15 V TP15 +14,75…+15,25 V
DC
OK
[TC 020.43] -15 V TP14 -14,75…-15,25 V
DC
OK
Measurement
Equipment: RMS Voltmeter

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2.3 RF-Splitter
Test procedure:
Disconnect the DF-Antenna from RF-IN on connector panel (see: General System Description,
Chapter: Connector Panel).
Connect 50Ωload to RF-IN on connector panel.
Measure the attenuation of RF-Splitter:
Connect the RF-Generator (Level 0 dBm) to the input TEST-IN of RF-Splitter and measure the
output levels at LNA1-OUT and LNA2-OUT.
Spectrum Analyzer setup: SPAN: 10 MHz, RBW: 3kHz, Ref. Level: 0dBm
TC.Nr. TC. Name Test point Limits Result Passed Not
Supplied
Single LNA (No Redundancy)
[TC 030.10] 118 MHz TEST-IN 
LNA1-OUT -17,5 dBm ±1,5 dB OK
[TC 030.11] 174 MHz TEST-IN 
LNA1-OUT -17,5 dBm ±1.5 dB OK
[TC 030.12] 100 MHz TEST-IN 
LNA1-OUT ≤- 30 dBm OK
[TC 030.13] 190 MHz TEST-IN 
LNA1-OUT ≤- 60 dBm OK
Double LNA (Redundancy)
[TC 030.20] 118 MHz
TEST-IN 
LNA1-OUT -21 dBm ±1,5 dB OK
[TC 030.21] TEST-IN 
LNA2-OUT OK
[TC 030.22] 174 MHz
TEST-IN 
LNA1-OUT -21 dBm ±1.5 dB OK
[TC 030.23] TEST-IN 
LNA2-OUT OK
[TC 030.24] 100 MHz
TEST-IN 
LNA1-OUT ≤- 30 dBm OK
[TC 030.25] TEST-IN 
LNA2-OUT OK
[TC 030.26] 190 MHz
TEST-IN 
LNA1-OUT ≤- 60 dBm OK
[TC 030.27] TEST-IN 
LNA2-OUT OK
Measurement
Equipment: Spectrum Analyzer RF-Generator

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2.4 DF-Channels
2.4.1 Display and Control Elements
Test procedure:
Connect the RF-Generator to the antenna model Input. Connect the antenna model output to
the Test In port of the RF-Splitter. Switch on the RF-Generator.
f = 127.000 MHz, Level = 0 dBm, Modulation AM: 800 Hz, m=60%.
Check the functionality of all control elements at all DF-Channels.
TC.Nr. TC. Name Description Criteria Passed
[TC 040.10] Switch «On/Off» - Position «ON» OK
[TC 040.11] LED «+5V» Supply +5V Green OK
[TC 040.12] LED «+15V» Supply +15V Green OK
[TC 040.13] LED «-15V» Supply -15V Green OK
[TC 040.14] LED «Pow» Control lamp receiver
supply voltage Green OK
[TC 040.15] LED «Sql» Control lamp for
receiver squelch Yellow OK
[TC 040.16] LED «F+, F-» Control lamp,
frequency offset LED is off OK
[TC 040.17] LED «No Sync» Control lamp for error
in receiver LED is off OK
[TC 040.18] Display «Frequency
(MHz)» Frequency (MHz) indication Frequency indicated OK
[TC 040.19] Switch «Local/Remote» Switch for
Local/Remote Mode Local and Remote Mode switched OK
[TC 040.20] Button «Band» Switch for ATC band
and Marine band ATC band and Marine band switched OK
[TC 040.21] Switch
«Level/Frequency/QDR»
Switch for Input RX
Level and QDR
(Switch is not fixed)
Input RX Level and QDR
Switched OK
[TC 040.22] Button «↑,↓» Buttons for frequency
change in local mode Frequency changed OK
[TC 040.23] Bearing indication on
Display (*) - With a bearing signal is « * » displayed OK
[TC 040.24] Sync (o.k , Err.) Synchronizations LEDs of the control
signals
Green OK
[TC 040.25] Audio Check the audio output at the
loudspeaker
The audio tone of 800 Hz
should be audible OK
Measurement
Equipment: RF-Generator Antenna Model

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2.4.2 Phase Adjust
Test procedure:
Connect the antenna model to the RF-IN of the RF-Splitter.
Connect the RF-Generator with 127.000 MHz and with a level of -7 dBm at the antenna model
RF input. Adjust the receiver to the 127.000 MHz. Switch the Antennal Model to 000°
(QDM 180°).
Phase adjustment can be set using the two rotary switches, "fine" and "coarse". Use these
rotary switches and find the middle of the range where the green control lamp lights up. The
QDM display should then show 180° (QDM).
TC.Nr. TC. Name Test point Result Passed Not
Supplied
[TC 040.30] Phase Adjust
DF-Channel 1
Phase Adj.
OK
LED Green
coarse: OK
fine:
[TC 040.31] Phase Adjust
DF-Channel 2
Phase Adj.
OK
LED Green
coarse: OK
fine:
[TC 040.32] Phase Adjust
DF-Channel 3
Phase Adj.
OK
LED Green
coarse: OK
fine:
[TC 040.33] Phase Adjust
DF-Channel 4
Phase Adj.
OK
LED Green
coarse: OK
fine:
[TC 040.34] Phase Adjust
DF-Channel 5
Phase Adj.
OK
LED Green
coarse: OK
fine:
[TC 040.35] Phase Adjust
DF-Channel 6
Phase Adj.
OK
LED Green
coarse: OK
fine:
[TC 040.36] Phase Adjust
DF-Channel 7
Phase Adj.
OK
LED Green
coarse: OK
fine:
[TC 040.37] Phase Adjust
DF-Channel 8
Phase Adj.
OK
LED Green
coarse: OK
fine:
Measurement
Equipment: RF-Generator Antenna Model