Remote Parameters, Hoping Sequence | Black Box MWU2000-V35 manual

2.048Mbps Wireless Modem

Changing the modem rate above the default value results in the following:

•The higher the modem rate, the lower the sensitivity. Achievable distances decrease as the modem rate increases.

•The higher the modem rate relative to the LIU data rate, the higher the effective bandwidth. Better use is made of the frequency diversity capability inherent to the frequency hopping mechanism.

In conclusion, providing that the received signal level is sufficient, selecting a higher modem rate can significantly improve performance in the presence of interference.

Hoping Sequence

Current HOPPING SEQUENCE and HOPPING STANDARD are displayed. The number of available hopping sequences depends on the Hopping Standard of each country. The Hopping Standard is set in the factory. If several links in the same area are used (without using the synchronization feature), select a different hopping sequence for each pair of 2.048Mbps Wireless Modems. Master and Slave units must use the same hopping sequence. If co-located units are synchronized, the same hopping sequence should be used for all units (or else the synchronized units will interfere with each other as though not synchronized) – the synchronization process verifies that each pair uses a sequence that is sufficiently “shifted” in frequency relative to sequences used by other pairs.

Add/Remove Channels from Test Sequence

Selection of this option in the RADIO and MODEM Parameters menu opens the Add/Remove Channels from Test Sequence menu. This menu allows you to determine the specific channels to be used when Test Sequence is used as the Hopping Standard. Test

Sequence should only be used as the Hopping Standard by authorized Black Box technicians. Any changes to the Test Sequence channels shall have no effect when regular Hopping Standards are being used. Therefore, do not attempt to select this option or to modify the test sequence channels under normal conditions.