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FAQ: General

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You may also choose one of the listed questions below:

  1. Why is my VHF-radio transmission disturbed?
  2. The light doesn`t work. (is not shining)
  3. Will the easyAIS and easySPLIT work fine with APPLE-Macintosh (Powerbook?)
  4. Are all “Sentences NMEA” of the GPS antenna passed through or simply “Sentence GPRMC”?
  5. Which mininal distance from antennas (GPS and Navtex) I already have?
  6. The fm-output is limited at 108 MHz. Is this a low-pass filter or a band-pass filter which lets the vhf-area passing.
  7. How can I register my radio-station?
  8. Is there a possibilty to check, whether everything works how it is supposed to work.
  9. Is there a unit which combines the functions of AIS transmitter and receiver, weather fax and antenna splitter?
  10. Is it possible just to transmit with an easy TRX?
  11. How to connect my Easyais TRX2 to Lowrance HSD 5 and HSD 7 Units?

Answers:

1. Why is my VHF-radio transmission disturbed?
One reason could be the antenna for VHF, you use. But also for this there should be a solution. Please, connect the antenna cable for the car radio „without ground ground“ to the easySPLIT. That means, only the inside wire is used. Do not connect the outside ground (the cable which is connected to the ground ground of the chinch plug or ground of the car radio).
For a short explanation, the physical effect of that: An antenna is always a dipole. Normally the inner wire of a coaxial cable is connected to the upper dipole, the outer ground is connected the lower dipole of the antenna. But he usual antennas for sportsboats on the market do have not a lower dipole. This lower dipole is simulated by a adapted network (that means nothing else than a high-frequency transformer). The adapted network is adjusted onto a frequency area about 150Mhz to 163Mhz. The outside ground of the antenna cable has also an important function to adjust the antenna to the frequency area of 150-162 Mhz. If you do not use the outer ground for the car radio plug („outer conductor“ or „ground“), you will have nothing else than a „flying antenna“ for your car radio and it should work also good for the FM radio frequencies.

2. The light doesn`t work. (is not shining)
Please, switch it on!

3. Will the easyAIS and easySPLIT work fine with APPLE-Macintosh (Powerbook?)
The basic question is, whether the powerbook has a serial COM-Interface (RS 232).
Some notebooks haven’t. You can help yourself with a Com-to-USB adapter. The apple- or pc-software (for example a terminal-program)uses the COM-interface and shows the encoded telegrams, that the easyAIS has received. Because the easyAIS is working with the NMEA0183 standard, the information is received as ASCII-telegram at 38400 baud (start-and stopbite, non parity). All current terminal-programs can show this signs, whatever they run on PC or Apple. For decoding the AIS-information, you need a special software (i.e. a card plotter-program with AIS-functions).
You can find some pc-software on www.yacht-ais.de. Unfortunately, we can`t say whether it works with apple or not.

4. Are all “Sentences NMEA” of the GPS antenna passed through or simply “Sentence GPRMC”?
Since November the 6th 2006 we changed some program parts in the firmware, so that since that time ALL the NMEA data are passed through.

5. Which mininal distance from antennas (GPS and Navtex) I already have?
We recommend at least 80 cm. (Simrad e.g. recommends 100cm.) Please be aware, as higher you mount the VHF as better the transmission and reception will be.

6. The fm-output is limited at 108 MHz. Is this a low-pass filter or a band-pass filter which lets the vhf-area passing.
The frequency-area of the VHF-radio-output is limited to 108 MHz, that means higher frequencies can not pass this output. The reception of DVB-T isn’t possible at this time.
Information: The reception of wave bands outside the VHF-area is not possible with the mostly installed marine communications antenna. That means at best it would only be possible to receive the lower area of the VHF-DVB-T band. For the reception of the higher UHF-wave bands a change of the existing antenna to a multiband-antenna is needed. Because of the mostly used coaxial cables (RG58/RG213) and coaxial plug-in systems (PL259/SO239) the transmission loss and the losses with reflections in the connectors/plug sockets are so much increasing that a good reception of higher frequencies is only possible with a quality downside.
For this you have to change the using connectors and plug-sockets in suitable versions for VHF.

7. How can I register my radio-station?
If you want to operate a dsc-radio station or an AIS-transponder easyTRX on a boat, you need a registration for this radio-station.
You get the registration from the federal network agency. The federal network agency will allocate your radio-station a MMSI-number, which you program into the easyTRX. If you already have a MMSI and additional you want to operate an easyTRX, you must send a notification of change to the federal network agency. You program your existing MMSI into the easyTRX.
- Under this link you get more information: Bundesnetzagentur Aussenstelle Hamburg Sachsenstr. 12 und 14 20097 Hamburg Tel.: 040 23655-0 Fax: 040 23655-182 E-Mail: seefunk@bnetza.de http://www.bundesnetzagentur.de/

8. Is there a possibilty to check, whether everything works how it is supposed to work.
Then the red light is jittering the easyAIS is receiving messages. If there is no object by near, nothing is jittering and nothing is seen on the plotterscreen.

9. Is there a unit which combines the functions of AIS transmitter and receiver, weather fax and antenna splitter?
Unfortunately there is not such a unit as far as we know. There is only our active splitter for AIS transceiver at the moment. To realize your wish we suggest following:
AIS transceiver – “easyTRX”;
AIS Class B active splitter – “easySPLIT OCB”;
weather fax I would recommend the “Infobox WIB3”.

10. Is it possible just to transmit with an easy TRX?
Althogh you just want to transmit, it is necessary to have both antennas. The unit have to receive the exact position, to transmit your position. So you need a receiver to get your position and a transmitter to send your position.

11. How to connect my Easyais TRX2 to Lowrance HSD 5 and HSD 7 Units?
The plotter Lowrance HDS 5 and HDS 7 feature a differential type input for connecting external NMEA devices and therefore they require a bipolar signal at these points.
To fix that problem you have to connect a capacitor in-line with the NMEA Positive Signal wire between the Easyais TRX output  and the Lowrance HDS unit. In this way you get a 100% function.

Please use the inputs and outputs at 38400 baud, to avoid traffic congestion and potential loss of data at high AIS traffic.
Note the following requirements for the capacitor:

- Value: 100nF
- Ceramic or plastic, does not matter
- Voltage:> 16V DC


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