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FAQ: easySPLIT OCB

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You may also choose one of the listed questions below:

  1. Which kind of data will be transmitted through the class B transmitter?
  2. Is it correct, that the easySPLIT has a standby-current of only about 25 mA and however the OCB-version has 120 mA.
  3. Why do I need another splitter type to use it with the easyTRX?
  4. Is it possible to combine the easySPLIT OCB with the DSC Pacific? Reason: I want to install a Simrad Al50 and want to use the existing DSC Pacific antenna.

Answers:

1. Which kind of data will be transmitted through the class B transmitter?
The class B transmitter, as you know, is a “light” version of the class A transmitter. The differences are:
Class B: lower rate of telegrams (e.g. every 30s for a speed of 14kn, whereas for the class A transmitter it is every 10s). Does not transmit the IMO number or the call sign. Does not transmit ETA ordestination. Does not transmit the status of navigation. It is necessary to receive or transmit binary messages. Does not transmit if the the ship is turning. Does not transmit the draft.

2. Is it correct, that the easySPLIT has a standby-current of only about 25 mA and however the OCB-version has 120 mA.
Yes, that is right.
The normal easySplit has a lower standby-current because the relais, which is switching off the AIS and fm-radio while the VHF-transmission, does not need a current during the standby mode. However the pin-diods inside the easySplit OCB need a standby-current.

3. Why do I need another splitter type to use it with the easyTRX?
You need to use the easySPLIT OCB (OCB=operates class B) because of the following reason.
If you use the easySPLIT there are connected the following devices: FM radio, VHF radio and AIS receiver. Only one of these units can phisically also transmit, which is in this case the VHF radio. In the moment when the VHF radio is transmitting, the other connected devices must be disconnected very fast, so that the transmission power from the VHF is only going into the antenna and not into the also connected devices.
Lets have a look now at a typical installation of the easyTRX. With the easySPLIT OCB there are following devices connected to the easySPLIT OCB: The FM Radio, the VHF Radio and the easyTRX, which is a Class B transceiver. There are 2 (two) devices connected which can transmit. This means also, that the two connection pathes of the CHF radio and the easyTRX must be monitored simultaneously. If one of the "transmitter" is transmitting, the other devices must be disconnected for this period of time. This is the difference.
With a standard AIS receiver it is sufficent to montior one connected "transmitter" power entry pathes, with a Class B transceiver, like the easyTRX two connected "transmitter" power entry pathes.

4. Is it possible to combine the easySPLIT OCB with the DSC Pacific? Reason: I want to install a Simrad Al50 and want to use the existing DSC Pacific antenna.
It is possible to combine your DSC Pacific with our easySPLIT OCB. But please do not put the easySPLIT OCB between box and antenna, but on the exit for the VHF radio.


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