SATEL-EASy+
User guide
Version 1.33
43
7 TEST MODES
The radio modem can be switched to a Test Mode in which it will send test messages to the
radio channel. Test messages can be utilized for example when directing antennas during
system installation. The transmitting radio modem needs only a power supply and an antenna
in the test mode but no external terminal device.
If the test mode has been set ON, the radio modem starts to transmit test messages
immediately after a reset or a power-up. Test messages are treated as normal data at the
receiver side. The recommended data speed at the serial port of the receiving radio modem is
38400 bps @ 25 kHz radio channel or 19200 bps @ 12.5 kHz.
The test modes are designed for SATELLINE-3AS, SATEL-8FSK-1, SATEL-8FSK-2, and SATEL-
16FSK-1 radio compatibility modes.
7.1 Short block test
In this test mode the radio modem sends a short test message that is preceded by a consecutive
number and terminated by the Carriage Return and Line Feed characters. The test messages are
repeated continuously at 1 second intervals. The short block test is suitable for running radio
link tests. Reception of data can be monitored using a suitable terminal program.
Example of short data blocks:
00 This is a test line of SATELLINE-3AS radio modem
01 This is a test line of SATELLINE-3AS radio modem
7.2 Long block test
In this test mode the radio modem transmits a test message continuously for 50 s. After 10 s
break the test transmission is started again. The transmission sequence is repeated
continuously. The long block test can be used in order to measure the transmitter output power,
standing wave ratio (SWR) of the antenna system or RSSI (Received Signal Strength Indicator)
level at the receiver stations. RSSI can be monitored easily on the LCD display of the receiving
modem or by using SL command “SL@R?”.
Example of a long data blocks:
99 This is a long test line of SATELLINE-3AS radio modem
00 This is a long test line of SATELLINE-3AS radio modem
To Next Page
Loading...
