Operating instructions

1892 1335 - Orion Radio Modem Operating Instructions - v2.9 / Aug 2009 59
Engineering > TX Carrier, no timeout
Engineering > TX Preamble, no timeout
Engineering > TX Random Data, no timeout
Only for use by W&D engineers. As above, but with no automatic timeout. Password
protected.
Stop TX Test
The test in progress will be terminated and the Orion will go back to normal operation.
Remote Tests
The Remote Station ID must be entered in the field just above the yellow text area, either by
typing it or selecting it from the drop-down list if this was used.
Select Remote > followed by the feature:
Remote TX on
This feature is for signal strength measurements and antenna adjustments. From a Base, the
selected Outstation transmitter is turned on for 30 seconds, and from any Outstation, the Base
Transmitter is turned on. When the test is complete, the average RSSI value is displayed in
the yellow text field. The value will vary according to the radio and other factors, but as a guide
a reading of over 900 will provide a good link using SX450G radio modules.
Remote Bit-check
A message containing 150 bytes is transmitted from the Base to the selected Outstation, or
from any Outstation to the Base. When the message is received at the remote station, it is re-
transmitted back and checked for bit-errors. The result will be shown in the yellow text field.
Any errors indicate an unsatisfactory link.
Link Quality monitoring
When you click this menu item, a new window will show (Figure 27, below). At a Base
station, select the ID of the outstation which you want to monitor. Outstations only monitor
quality between themselves and the Base. When a valid data packet is received, a new line
is added to the window with the received message RSSI and DQ in the range 30 - 255. The
data quality is taken from the modem chip data quality register. Low figures indicate poor
data quality, and readings below 80 indicate a poor link.