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STL-SAT Changeover
© 2018 ITEL SNC
2.4.9
MPX parameters Reading
In the ninth submenu of the changeover, some parameters of the incoming MPX signal are shown
Ext PI:
Pi code of the incoming MPX signal. This code, if an exchange mode is enabled that identifies the PI
code, must be the same as the PI generated internally, otherwise the MPX source will be considered an
alarm.
Lev:
peak MPX input signal level (100% = 75KHz)
Qlt:
Incoming RDS signal quality.
19K:
pilot tone level of input MPX signal.
2.4.10 RDS Data Buffer
In the tenth menu under the Changeover menu are displayed: the status of the buffer that contains the
incoming RDS data, the quality and the time base used.
A proprietary algorithm manages the buffer queue to ensure proper operation even under difficult
reception conditions.
However, if the quality of the RDS signal drops below 80% and regardless of the override setting, the unit
will automatically switch to "full override" by replacing the entire received RDS block with that generated
internally.
2.5
System
The fourth available menu allows you to select some system parameters such as general settings,
communication, keyboard, and password.
2.5.1
GPIO Port Control
In the first submenu of the system, the control window of the GPIO card and the reversal state of the
master-backup channels are shown.
It may be necessary sometimes to temporarily exchange the master channel with the secondary (backup).
This function can be called by activating the "SwapChans" flag, by means of a sms ("SWAP" command) or
by a temporary contact on the TC_SWAP input of the GPIO card: each GPIO or SMS message impulse will
reverse the state of the Swap function.
Example:
Start
SwapChans=OFF
<input close for while TC_SWAP>
SwapChans=ON
<sms "SWAP">
SwapChans=OFF
Summary of Contents for STL-SAT Changeover
Page 2: ......
Page 5: ...Section 1 Introduction...
Page 15: ...Section 2 Display Function...
Page 27: ...Section 3 Control Software...
Page 49: ...Section 4 GSM SMS Functions...
