mcmurdo F1 DSC Installation Manual Download Page 26

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Page 20

Technical Specifications

The McMurdo F1 DSC Radiotelephone conforms to all relevant international
requirements agreed for a VHF DSC class D radiotelephone by ETSI, IEC, ITU and
IMO.

These specifications include ETSI 301 025, IEC 62238, IEC 60945, ITU-R M.493-10
and ITU-R M.541-8

General Information

International channels

All channels for international 25kHz operation

US channels

All channels for US waters with 25 kHz spacing
All US weather channels

Private channels

30 programmable channels for 25kHz operation

Channel spacing

25kHz

Operation modes

Simplex/semi-duplex

Modulation

G3EJN for telephony operation
G2B for DSC operation

Frequency stability

10ppm

Aerial connector

SO239 50 ohm female

Temperature range

-15°C to +55°C

Supply voltages

12 V DC nominal, range 10.8 to 15.6V DC

Supply current

0.23A standby
1.6A transmit low power
5.0A transmit high power

Transceiver dimensions

85mm h x 195mm w x 180mm d

Transceiver weight

2.1kg

Receiver

Sensitivity

-119dBm for 12dB SINAD

AF internal speaker

4W/4 ohms

AF external speaker

4W/4 ohms

Distortion THD

< 5%

Signal/noise ratio

> 40dB

AF response

6dB/octave

Spurious emission

< 2nW

Spurious response

< 70dB

Intermodulation attn.

> 68dB

Blocking better than

> 90dB

Co-channel rejection

> 10dB

Adjacent ch. selec.

> 70dB

Summary of Contents for F1 DSC

Page 1: ...McMurdo F1 DSC Marine VHF Radio with DSC Installation Manual ...

Page 2: ...cluding DSC is legislated it is therefore necessary for the user to have a certificate from the legislating authority in the country where the radio is to be used When the radio is registered the legislating authority will issue the MMSI number necessary for the operation of the DSC function A CD ROM simulating the operation of the F1 DSC Radiotelephone can be obtained from McMurdo on application ...

Page 3: ... following installation It is also important to inspect all cables and connections at regular intervals such as twice yearly Disclaimer Information contained in this manual is supplied in good faith but is liable to change without notice McMurdo Limited disclaims any liability for consequences arising from omissions or inaccuracies in the manuals and documentation provided with this product 2002 M...

Page 4: ...ntrols of your vessel may be obstructed b it may obstruct your normal movement around your vessel c it may cause bodily injury d it cannot be easily accessed in an emergency Use WARNING Certain parts of the chassis can become hot during extended periods of operation notably the rear panel connectors and radiator fins Avoid touching these areas when the radio is operating WARNING Do not touch the r...

Page 5: ... refer to the F1 DSC Radiotelephone Operation Manual for full radio operating procedures IMPORTANT In most countries the operator of the transceiver must possess a current radio telephone licence and the equipment must be registered Call Sign and MMSI number Please contact the relevant authority in your country for more information IMPORTANT Normal users of the transceiver should be trained licens...

Page 6: ... Bulkhead and instrument panel mounting kit kit number 84 413 8 Drilling guides 9 Electrical connections 11 Connection of power supply 11 Connection of external loudspeaker 13 Connection of GPS for position information 14 Connection of fist mike to the rear D sub connector socket 15 Connection of fist mike to the D sub plug 16 Connection of antenna 17 Performance check 19 Technical Specifications ...

Page 7: ...mmed once it is not possible for the operator to alter the number without returning the radio to the supplier or to McMurdo Ltd To program the MMSI follow these illustrations 1 Turn on the Radio 2 When the radio shows the standby display Press the Menu action key 3 Use the scroll key to display the menu Profiles and press the Select action key 4 Use the scroll key to display the menu MMSI number a...

Page 8: ...r correct the MMSI number once more only However after one hour from the time of entering the first MMSI number the radio will inhibit changing the MMSI number If this happens the radio must be returned to McMurdo via the supplier for reprogramming to allow entering another MMSI number ...

Page 9: ... compass it is necessary to mount the radio transceiver no closer than 0 5 metres to any compass installed in the vessel The VHF communication range is limited to line of sight It is therefore very important that the antenna is installed as high and as free of obstacles as possible It is also important to ensure that the connection from the antenna to the radio uses a 50Ω low loss cable and that t...

Page 10: ... on page 9 Before the bracket is fixed to the table or the ceiling make sure that there will be enough room for the radio and the cables The main dimensions are shown in the figures below When the tabletop bracket is mounted install the radio and find the angle that will be most suitable for operating the radio then tighten the lock knob When the radio is in position in the bracket connect the nec...

Page 11: ...Page 5 ...

Page 12: ... radio and connecting cables In the illustration the dimensions of the required space are shown The illustration also shows an exploded view of the assembly process A cutout template is provided in the flush mounting kit take particular care to be accurate when cutting the hole If the hole is too large the installation may not be watertight or the installation may appear untidy When using the flus...

Page 13: ...Page 7 ...

Page 14: ... or instrument panel is sufficient to accommodate the radio and connecting cables The dimensions of the required space are shown in the illustrations below Note that unlike the Flush Mount Kit see page 6 the panel thickness is limited to 12mm due to the slightly different construction of the Simple Bulkhead Panel Kit A cutout template is provided in the mounting kit take particular care to be accu...

Page 15: ...Page 9 Drilling guides Table top bracket drilling guide ...

Page 16: ...Page 10 Flush mount kit cutting guide Bulkhead and instrument panel mount kit cutting guide A full size template is provided with each mount kit ...

Page 17: ...se such as an engine An external loudspeaker can be connected to the two central pins in the power plug see page 13 The external loudspeaker can be switched on off via the Speaker Settings in Profiles An additional fist mike can be connected via the 15 pole D sub connector at the rear of the radio This additional connection is in parallel with the fist mike attached to the front Connection of powe...

Page 18: ...Page 12 Table 1 Recommended wire size for connection of power supply Supply From To Wire mm 2 Maximum length 12 VDC Battery F1 DSC 2 5 1 5m 12 VDC Battery F1 DSC 5 0 3 0m ...

Page 19: ...nected to the two wires in the power plug intended for this use If it is necessary to extend the wires to the external loudspeaker wire dimensions as specified should be used Table 2 Recommended wire size for connection of external speaker Speaker From To Wire mm 2 Maximum length 4 ohm F1 DSC Speaker 0 75 3 0m 4 ohm F1 DSC Speaker 1 5 6 0m ...

Page 20: ... this GPS interface directly via the two wires to the 15 pin D sub connector The NMEA protocol transmits the position information via named sentences The named sentences that can be used are GGA GLL GNS RMC and ZDA Table 3 Recommended wire size for connection of GPS If it is necessary to use longer wires than those provided with the radio wire dimensions as specified should be used As the GPS conn...

Page 21: ... used for bulkhead or instrument panel installation of the F1 DSC Radiotelephone it is necessary to connect the fist mike to the D sub connector at the rear of the radio A wire loom is provided to connect the fist mike to the rear of the radio The illustration below shows how this loom is connected ...

Page 22: ...front of the radio is inconvenient the mike can be connected to the D sub connector at the rear of the radio as shown Table 6 Connection of fist mike to D sub connector FISTMIC REAR CONN PIN SIGNAL FUNCTION White 8 PTT2 Press To Talk line for rear socket Grey 9 Mic2 Positive connection for microphone Black 15 POWER Ground ...

Page 23: ...specialised antennas may have gains as high as 9dB Depending on the environment the 3 dB gain antennas can give better coverage and together with a low loss antenna cable will ensure greater radiated signal power and better receiver sensitivity When securing the antenna plug to the coax cable make sure that the cable is prepared to the dimensions shown in the illustration below A frequent cause of...

Page 24: ...eight above water level of the transmitter and of the receiver As the eye of the radio is the antenna the communication range depends on the height above water level of the antennas The illustration shows the line of sight the curvature of the Earth is exaggerated for clarity Table 5 Line of sight distances h2 m 0 5 1 3 5 10 30 0 5 3 1 3 8 5 4 6 6 8 6 13 8 1 3 8 4 5 6 1 7 2 9 3 14 4 3 5 4 6 1 7 7 ...

Page 25: ... the radio key in a valid position and time 4 Adjust the squelch and make sure that the squelch can silence the radio 5 Make a telephony call to a coast station Ask for radio check 6 Make sure that the coast station operator can read you clearly and that you can read the coast station clearly 7 If the called coast station is capable of receiving DSC messages ask for a DSC test call to be made make...

Page 26: ...pacing 25kHz Operation modes Simplex semi duplex Modulation G3EJN for telephony operation G2B for DSC operation Frequency stability 10ppm Aerial connector SO239 50 ohm female Temperature range 15 C to 55 C Supply voltages 12 V DC nominal range 10 8 to 15 6V DC Supply current 0 23A standby 1 6A transmit low power 5 0A transmit high power Transceiver dimensions 85mm h x 195mm w x 180mm d Transceiver...

Page 27: ...5mW AF response 6dB octave Signal noise ratio 40dB DSC Facilities DSC operation According to Rec ITU R M 541 8 DSC protocol According to Rec ITU R M 493 10 class D Navigator interface NMEA 0183 GGA GLL GNS RMC and ZDA Symbol error rate 1x10 2 for 119dBm Modulation 1700 Hz 400 Hz 1200 baud 30 ppm Frequency error 1 Hz Residual DSC mod 26 dB ...

Page 28: ...laims must be made under the above warranty in writing as soon as practicable after discovery of the defect or failure and within the warranty period referred to above Proof of purchase will be required The claim should be sent together with the product in question to the address set out below or to an Approved Service Agent Following a valid warranty claim McMurdo Limited shall be entitled to rep...

Page 29: ...Page 23 Declaration of Conformity The Declaration of Conformity is provided as a separate document ...

Page 30: ...Page 24 Notes ...

Page 31: ...Page 25 ...

Page 32: ...6 Record Serial No MMSI Date of Purchase Dealer Stamp McMurdo Ltd Silver Point Airport Service Road Portsmouth Hampshire United Kingdom PO3 5PB A member of Chemring Group PLC www mcmurdo co uk 84 783 Issue 1 ...

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