Test Patterns (via Test Pin)
-Selecting any of the selections in this box will cause a test pattern to be
transmitted when the Test Pin (PTT) is active. If no selection is made, activating the Test Pin will cause the
radio to transmit in analog/voice mode. The choices are:
Bit Error Rate (BER)
-A pn pattern is generated which allows for the computation of bit error
rate, setting deviation, or observing an eye pattern. The pattern is 511 symbols long with no
synchronization symbols and repeats continually. It is a maximal length pattern with feedback taps
at the 5 and 9 bit positions.
Send Test Pattern
-A packet which transmit over and over with a constant data structure. This
pattern can be used to test the system in the low latency and streaming modes.
Square Wave Generator
-Transmits a 400 Hz square wave. Used to set the deviation and
modulation balance during alignment or to hear the transmitted 400 Hz tone on a receiver or radio
modem in analog/voice mode.
TX Carrier Mode
-An unmodulated carrier is transmitted.
Protocol 2.00-
The items is this box select the identification parameters used in the legacy 2.00 protocol.
Source Station ID-
Source Station ID-Sets the address of the modem itself. It is made up of 4
parts, from most general to most specific: System ID, Group ID, Unit ID, and Sub-unit ID.
Default Destination ID
-Sets the destination ID of the intended recipient.
Protocol Mask-
The protocol mask determines how close a mask must exist between the modem’s
ID and the destination ID in the message before accepting and outputting to the host the message.
A ‘1’ for any location in the mask requires a perfect match, while a ‘0’ means a ‘don’t care’
situation. This is useful for ‘broadcast’ i.e. one unit transmitting to more than one unit situation.
Note: In broadcast applications, the ‘Acknowledgement after TX’ selection should NOT be
selected to prevent multiple units from responding and interfering with each other. See below.
Configuration-
Acknowledgement required after transmit-When checked, the modem requires an
acknowledgement after each transmission or the transmission will be repeated.
Message Retry Limit and Timeout Time-The amount of time in ms that the modem will
wait for an acknowledgement and the number of times it will repeat a message can be set
in the Message Retry Limits box and the Time Out Time boxes
Dead Carrier before Symbol Sync-The amount of time in ms that an unmodulated carrier
will exist before the beginning of the symbol sync pattern.
Partial Packet Timeout-The amount of time in ms of no data from the data device that
must exist before a packet is formed and transmitted.
