rpc2a-000-dil Radiometrix Ltd, rpc2a-000-dil Datasheet - Page 13

• Manufacturer Part Number: rpc2a-000-dil
• Description: Uhf Radio Packet Controller
• Manufacturer: Radiometrix Ltd

Listen Before Transmit, LBT, and Delay Before Transmit, DBT determine what collision avoidance the
RPC2A will take before each transmission.
Radiometrix Ltd, RPC2A
LBT
0
0
1
1
DBT
0
1
0
1
Function
Immediate TX, no channel check
Fixed delay TX, no channel check (time slots)
This is useful for rapid polling of up to 255 units by a master station.
SLOTS is set to the units ID number, the packet size, preamble length
and change over delay must be the same for all units being polled.
see - EEPROM parameters
Immediate TX, if channel is clear
The receiver is turned on and the channel checked for preamble or data.
The RPC2A will only go to transmit when the channel is clear.
Random delay TX, if channel is clear
This mode is useful in random access networks where there is a high
statistical probability that more than 2 RPC2As could be attempting to
transmit at the same time. The receiver is turned on and the channel is
checked for preamble or data. If the channel is clear the RPC2A will go to
transmit, if the channel is busy the RPC2A will delay by a random time
(setable by TX-BACK-OFF in EEPROM) then try again for a clear
channel.
OLLISION
VOIDANCE
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