RDT RM96xx User Manual page 7

... repeater modes continued
Repeat All
Repeat All mode is similar to the Standard Repeater mode with the exception that all valid RM96xx
messages are repeated regardless of their address. This permits the use of a base station operating under
Serial Control and enables the master to communicate with a specific remote modem rather than
broadcasting to all.
PC
Serial
I/O
RM96xx
Serial Control Mode
(Variable Address)
Notes
An RM96xx in Repeat All Mode will receive data from normal RM96xx
units or from Repeater Remote Units regardless of their address.
A normal RM96xx unit will not receive messages directly from a
Repeater Remote.
A Repeater Remote unit will not receive messages directly from a
normal RM96xx.
Date sent from the Serial Control RM96xx will only be output at the
Repeater Remote which is set to the same address.
Automatic Repeat
Automatic Repeat mode allows a message to be automatically transmitted along a 'chain' of up to 255
repeaters. Each repeater has its address set 1 above its predecessor in the chain. Each unit 'listens' for
messages from units with addresses 1 below or 1 above their own. (For example unit 6 will listen for
messages from 5 and 7). When it receives a message from the higher of lower address it will re-transmit it
on its own address. Having transmitted it will disable its receiver for approximately 50mS to prevent reception
of the onward transmission.
A received message is repeated and output to the selected serial port at the same time. A message input at
the serial port of any modem in the chain will travel along the chain in both directions.
Customers wishing to use this mode of operation should contact their distributor or RDT technical support
for system planning assistance.
RM96xx
Auto-Repeater
Address 0
PC
A
Serial
I/O
Notes
An RM96xx in Automatic Repeater Mode will Transmit on its own address and receive on an address 1
higher or 1 lower. i.e. Unit B (above) will transmit with address of '1'. Messages from other Automatic
Repeaters will be accepted if their address is '0' or '2'. All units must be on the same RF channel.
After transmitting, an Automatic Repeater will be 'deaf' for a pre-defined time period:- (16k RF
rate=50mS, 8k RF rate=100mS, 4k RF rate=150mS).
This is to prevent unit A hearing the onward tranamission from unit B etc.
Repeat All Mode
RM96xx
Repeat All
Automatic Repeater
RM96xx
Auto-Repeater
Address 1
B
6
RM96xx
Repeater Remote
Address 1
RM96xx
Repeater Remote
Address 2
RM96xx
Repeater Remote
Address 3
RM96xx
Repeater Remote
Address 4
RM96xx
Auto-Repeater
Address 2
C
Serial
I/O
User
Equipment
Serial
I/O
User
Equipment
Serial
I/O
User
Equipment
Serial
I/O
User
Equipment
RM96xx
Auto-Repeater
Address 3
D
Serial
I/O
User
Equipment