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Installation
0622
9.4 Power supply
The VHF should be powered from a separately fused DC-supply of 10.8 - 32VDC and rated
at minimum 120W continuous power for installations with RT5022 (Simplex/semi-duplex),and
150W for installations with the RT5020 (Duplex)
9.5 Antenna installation and precautions
9.5.1 Antennas
The VHF equipment requires two antennas installed one for the DSC receiver and the other
(Primary) for the VHF RX/TX communication.
All commonly available 50Ω antennas covering the appropriate frequency range and
providing a VSWR less than 1.5 over this range may be used.
The antennas should be connected using a low loss type 50Ω coaxial cable, e.g. good
quality RG214 or better.
IMO-COMSAR/Circ. 32 recommends the use of a double screened type cable (like e.g.
RG214) with a maximum insertion loss of 3dB across the antenna cable installation. The
maximum antenna cable length in the installation thus depends on the quality of the cable
used, i.e. the specified attenuation (dB/m) of the cable of choise at the high end of the VHF
frequency band. As a rule of thumb the cable length using e.g. RG214 coaxial cable should
not exceed 25m.
For further details on equipment/antenna installation, reference is made to the IMO-
COMSAR/Circ. 32, GUIDELINES FOR THE HARMONIZATION OF GMDSS REQUIRE-
MENTS FOR RADIO INSTALLATIONS ON BOARD SOLAS SHIPS.
9.5.2 RX/TX antenna
In installations consisting of two or more VHF radios it is important to ensure the optimum
performance of these by carefully selecting the mutual antenna positions.
In general the highest possible RF attenuation between the VHF RX/TX antennas in the
installation should be sought for. The most important parameter in achieving this is by
ensuring that none of the RX/TX antennas in the installation are positioned at the same
horizontal level, i.e. the RX/TX antennas must be installed at shifted elevations as indicated
below.
In situations where sufficient vertical distance between two or more such antennas is found
difficult to obtain the horizontal distance between them will play an increasingly important
role in the equipment performance the less the vertical separation and as a minimum 5m
horizontal distance between any RX/TX antennas in the installation should be ensured.
Additionally, in order to minimize any increase in VSWR of the VHF RX/TX antenna this
should be installed in a distance no closer to any other mast/pole object or other RF anten-
nas than 2 m.
To the widest possible extend the VHF antennas should be kept out of the antenna main
beam of any radar and satellite equipment.
- SAILOR RT5022 VHF DSC 1
- SAILOR RT5020 VHF DSC Duplex 1
- Introduction 3
- Training Information 4
- Quick DSC distress call 5
- (only for emergency use) 5
- Mayday procedure 5
- Your VHF at a glance 6
- (RT5020/RT5022) 6
- Contents 7
- 1.1 Powering VHF 9
- 1.5 Speaker volume 10
- 1.6 Earpiece volume 10
- 1.7 Squelch 10
- Activating replay 11
- 1.11 Dimming 12
- 1.12 Contrast 12
- 2 Basic DSC operations 13
- 2.3 Transmitting DSC Calls 14
- 2.4 Call a ship station 14
- 2.5 Call a shore station 14
- 2.7 Call a group of ships 14
- 2.8 Create emergency calls 15
- 2.9 DSC call log 15
- 3 Your VHF in detail 16
- 3.4 Setting channel mode 17
- 3.5 Private channels 17
- 3.6 Duplex channels 17
- 3.8 Transmitter power 18
- 3.9 Channel scanning 19
- 3.10 Creating scan tables 19
- 4 DSC operations in detail 20
- 4.2 Group MMSI number 21
- 4.4 Working channel 22
- 4.5 Contact list 22
- 4.5.2 Show contact 23
- 4.5.3 Adding a new contact 23
- 4.6.1 Special calls 24
- 4.6.3 Automatic channel shift 25
- 4.7.1 DSC transmission 25
- Transmit Station Call 26
- MMSI: 001234567 26
- <Menu/back 26
- 4.8.1 Idle display 27
- 4.8.3 Language 27
- 4.8.4 Privacy talk mode 28
- 4.10 Automatic conditions 29
- 4.11.1 Radio software release 30
- 5 Errors and warnings 31
- Fuse 15A ATO 32
- 5.2.2 Self-test 32
- 5.2.3 GPS 33
- 5.2.4 Accessory connection 33
- 5.2.5 DSC routine testing 33
- 5.2.6 Missing MMSI 34
- 5.2.7 Radio time 34
- 5.2.8 Channel not free 34
- 5.2.9 Device failure 34
- 6 Menu tree 35
- 7 Optional functional devices 37
- 7.1.2 Operation 38
- 7.1.3 ON/OFF 38
- 7.1.4 Channel selection 38
- 7.1.5 Volume 38
- 7.1.6 Squelch 39
- 7.1.7 Dimming 39
- 7.1.8 Receiving a DSC call 39
- 7.1.9 Muting alarms 40
- 7.1.10 Transmitter power 40
- 7.1.11 Replay 40
- 7.2.1 Distress initiation 41
- 7.3 Printer 42
- 8.1 International channels 43
- 8.2 US channels 44
- 8.3 BI channels 45
- 8.4 CA channels 46
- VHF with mounting bracket 47
- Mounting option Drilling plan 48
- Drilling plan 48
- Handset for transceiver 49
- Installation 50
- 9.2 Compass safe distance 53
- Connection box board 639121 55
- Extension board 639123 55
- Cable connection diagram 57
- Interfaces 58
- Sparc II Connections 58
- 9.5.1 Antennas 61
- 9.5.2 RX/TX antenna 61
- 9.5.3 DSC antenna 62
- 10 Technical specifications 63
- Thrane & Thrane A/S 68
- [email protected] 68
- www.thrane.com 68
- B5022GB0 Issue: L /09 02 68
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