User's Manual

Page 51
E Series Data Radio – User Manual
© Copyright 2005 Trio DataCom Pty. Ltd.
Repeat/Translate Configuration
The modem is capable of operating in a repeater mode. Each user
port can be configured as a separate repeater. The associated
user ports are effectively disconnected from the “outside world”
when in repeater mode. Data received from the radio channel is
passed directly to the transmitter, and placed back onto the radio
channel. This feature requires a firmware revision of R2.12.1 or
later.
The repeater must receive a complete frame of data before it
is retransmitted. In some systems this store and forward delay
may be significant, and careful selection of maximum frame sizes
configured at the source unit must be considered to minimise the
delay.
To enable the mode select “Repeat Range” in the Type field and
specify the range of SID codes for which will be repeated.
Translate Streams
This function is similar to repeat streams however it also translates
the SID code from one value to another as the repeating function
occurs.
This mode can be used to uncontrolled data repeating in system
where more than one repeater is required, such as store and
forward systems or pipe-lines.
Diagnostics
Polled Diagnostics
The Diagnostics Processor can be configured to listen for
diagnostics on a range of SID codes. The factory default is SID
code 0 (From Stream 0 To Stream 0). The diagnostics responses
are sent back over the same stream as the questions.
Diagnostics Repeat
This option can be toggled on and off by clicking the button. Some
applications will require that a repeater unit in a point to multipoint
system repeats diagnostics frames only.
This will be the case when the system diagnostics controller is
connected to a remote unit in the system, and it polls the system
population from this point. The master unit must retransmit
any diagnostic frames that are not addressed to itself onto the
remainder of the population.
Automatic Diagnostic Reports
This option allows the configuration of automatic diagnostics. This
feature requires a firmware revision of R2.12.1 or later. This option
automatically appends diagnostics messages when user data is
transmitted. This option can be toggled on and off by clicking the
“Enable” button.
Minimum Report Interval : Specifies the amount of time before a
diagnostics message is appended to the next user data message.
Diagnostic Stream: Specifies the SID code used for the automatic
diagnostics message.
Controller Destination Address: Specifies the address of the
Diagnostics Controller Software that is receiving the automatic
messages and displaying them. This value must match that
specified in the TVIEW diagnostics software configuration.
Advanced
The Advanced button can be used to install diagnostics into the E
Series radio if it was not purchased with the original order. Enter
the 8 digit key-code supplied by Trio to enable diagnostics. If
diagnostics is already installed this option will be “greyed out”.
Collision Avoidance
In a point to multipoint system the master unit (usually a base
station) can transmit at any time and the remotes will all receive
the broadcast signal. However, if more than one remote unit
transmits at a time, then a collision will occur during the multiple
transmissions, resulting in a loss of data from one or more units.
Two collision avoidance mechanisms have been included in the
modem. The standard (Digital) method utilises a signalling channel
which is embedded in overhead data transmitted over the radio
channel. The second method utilises detection of a carrier signal to
Part I – TVIEW+ Management Suite - Programmer