Summary of Contents for Datawell 4A
- Page 1 Datawell GPS Buoy Finder Type 4A Manual from serial no.: 41226 Service & Sales Voltastraat 3 1704 RP Heerhugowaard The Netherlands +31 72 534 5298 +31 72 572 6406 August 21, 2013 www.datawell.nl...
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Page 3: Table Of Contents
3.1 Antenna....................9 3.2 Power switch .................... 9 3.3 Display ..................... 9 3.4 Buoy Finder 4A display messages ............10 3.4.1 Synchronization ................10 3.4.2 Gps messages ................10 3.4.3 Heave ..................... 11 ... -
Page 5: Introduction
In Chapters 2 and 3 of this manual the installation and operation of the Buoy Finder 4A are described. Chapter 4 is about battery replacement and troubleshooting in case of bad or no reception while Chapter 5 contains the specifications of the Buoy Finder 4A. -
Page 7: Front- And Back-Panel Layout
2 Front- and back-panel layout The front panel of the Buoy Finder 4A contains the following components: • Antenna connector. • Headphone connector. • LCD (liquid crystal display). • Up / volume switch ( ▲ ). • Menu / select switch ( •... -
Page 9: Operation
The Buoy Finder 4A comes with a small whip antenna. This antenna is designed for outdoor use only. It will not or badly work inside a building or a boat. If the Buoy Finder 4A is to be used indoors or on a location with bad reception, the antenna should be relocated by using a coaxial cable and a magnetic antenna foot. -
Page 10: Buoy Finder 4A Display Messages
Synchronization At start-up or after signal loss, the Buoy Finder 4A will try to lock in to a buoy signal. The synchronization process is necessary to make sure that the receiver is properly aligned to the RF-signal and to the vector boundaries of the buoy’s data pattern. The synchronization process is indicated by two messages on the receiver’s display:... -
Page 11: Heave
4-6 minutes, the age of the position does not exceed 36 minutes. If the age of the last found position exceeds 60 minutes, the Buoy Finder 4A removes this position from its memory and will not show it anymore. -
Page 12: Speaker
3.6 Menu functions and programming The Buoy Finder 4A receiver is fitted with a built in user interface. This user interface is used to adjust the receive frequency to a buoy frequency, to store and to recall up to six preset buoy reception frequencies and to monitor received signal characteristics. -
Page 13: Menu Structure And Control
3.6.2 Menu structure and control We will first show how the menus are organised: set frequency Menu hxv/hva set hxv or hva mode store preset number preset number recall info actual frequency signal status battery voltage current vector Figure 3.3. Organization of the menu structure. By using the “▲”, “... - Page 14 Pressing the “ ” knob again will select the second digit (steps of one MHz,) of the frequency adjustment function, this is depicted in figure 3.5 with an underlined number “ 0 ”: Figure 3.5. Selection of the 1 MHz steps digit of the frequency change function indicated by an underlined number 0.
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Page 15: Changing The Receiver Mode
3.6.3 Changing the receiver mode The Buoy Finder 4A can receive data in the HXV format and in the HVA format. The HXV format is transmitted by the MkI, MkII and MkIII generations of buoys. The MkIII generation includes the WR-SG, the DWR-MkIII and the DWR-G. The HVA format is transmitted by the “4-series”... - Page 16 Press the “▲” button twice so that the mem submenu is selected (figure 3.6). Step 3. Push the “ ” button and the memory submenu is shown (figure 3.8). Step 4. Figure 3.8. Display from the mem submenu. Select the sto (store) function by pressing the “ ” button once (figure 3.9). Step 5.
- Page 17 Recalling a frequency from a preset From the receive mode first enter the menu function by pressing the “ ” Step 1. button a few seconds. Press the “▲” button twice so that the mem submenu is selected (figure 3.7). Step 2.
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Page 18: Info Functions And Signal Quality Monitoring
3.6.6 Info functions and signal quality monitoring Four displays with parameters from the receiver can be displayed, namely the actual receive frequency, the signal status, the battery status and the current vector. These will be described below. Actual frequency display The actual frequency display shows the frequency to which the receiver is tuned with a resolution of 1 Hz. - Page 19 The signal status display can be accessed as follows: From the receive mode first enter the menu function by pressing the “ ” Step 1. button a few seconds. Press the “▲” button once so that the info submenu is selected (figure 3.7). Step 2.
- Page 20 Current vector display The current vector display shows the last decoded vector. Those vectors contain the information received from the buoy such as the GPS position information of the buoy. Figure 3.18. Displaying the current vector. The current vector display can be accessed as follows: From the receive mode first enter the menu function by pressing the “...
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Page 21: Battery Replacement And Troubleshooting
Department listed at the end of this manual. 4.1 Battery power and replacement The Buoy Finder 4A 4 runs on four 1.5 V AA type batteries. The batteries are placed in the battery compartment at the back panel, see Chapter 2. -
Page 22: Antenna, Signal Quality And Noise
A percentage of 11 to 30 % indicates questionable signal quality with many errors while a FER above 30 % will bring the Buoy Finder 4A in the “synchronize mode” as described in paragraph The signal strength indicator (figure 3.1) gives a graphical indication of the received signal. -
Page 23: Specifications
5 Specifications RF front-end Frequency range: 25.5 ... 35.5 MHz, other frequencies on request. Tuning: PLL synthesizer tuning. Frequency accuracy: ± 100 Hz. Usable sensitivity: -116 dBm (0.5 μV). Dynamic range: >60 dB. In practice this means that a signal differing 5 kHz or more with the buoy signal will do no harm at signal levels below -50 dBm. -
Page 25: Appendix A: Datawell Sales And Service Addresses
Appendix A: Datawell Sales and Service Addresses Sales: Zomerluststraat 4 2012LM Haarlem The Netherlands Tel: +31 23 531 6053 Fax: +31 23 531 1986 E-mail: sales@datawell.nl Service: Voltastraat 3 1704RP Heerhugowaard The Netherlands Tel: +31 72 571 8219 Fax: +31 72 571 2950 E-mail: servdept@datawell.nl...