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STL-SAT Changeover with RDS recoding

The ITEL STL-SAT Changeover is an automatic audio change-over system with RDS recoding. This unit realizes an automatic audio changeover between a stereo signal coming from a satellite receiver or other source and a MPX composite signal coming from a STL receiver.

Any of the two audio sources can be selected as the main source and the unit will continuously monitor its parameters, including audio level, pilot level, PI code and RDS quality (only audio level monitoring applies to the stereo audio source).

When any of the user-defined alarm thresholds are exceeded on the main source, the unit will switch to the backup source, getting back to the main, once it recovers.

A GSM modem can be fitted internally for remote control and alarms signalling through SMS.

A unique feature of this unit is the capability of suppressing the incoming RDS signal and superimposing a new, internally generated one or replacing its AF tables only.

In this latter case, all other pre-existent dynamic services will pass through the unit unmodified.  


  • Battery power Supply 24Vcc
  • Ethernet Interface
  • GSM Modem
  • GPIO Board

Technical Details:

RDS Encoder

Internal time base or automatically locked, using DSP-based PLL and filters, to the external MPX pilot carrier.

0A and 2A blocks

24 user defined PS strings

24 user defined RT strings

AF mode A and mode B with 25 AF tables

RDS subcarrier level injection 2 KHz-12 KHz

STEREO coder

Crosstalk >60dB

Input sensitivity -10dBm / +15dBm adjustable in 0.5dB steps

Pilot level and phase adjustable from front panel

MPX Input

Impedance 10Kohm

Accepted level 0dBm (2.2Vpp / 775mVRMS)

MPX Output

3 independent buffered outputs

Outputs will be bypassed on MPX input in case of equipment failure

Level 0dBm + 1dB / -3dB adjustable through rear panel trimmer

Remote control and connectivity

GPIO board for switch control and alarms

GSM Modem (optional) for data connection and SMS

Ethernet - TCP/IP


User interface

LCD Display 2 x 20 digit

Keyboard for menu navigation and parameters editing

Indication Led: main channel on air, backup channel on air, alarm, RUN (equipment is functioning properly)

Configuration software

Window XP, Vista, Windows 7, Windows 8.1, Windows 10 compatible

Power supply

100 - 240VAC 50/60Hz


Physical dimensions

1 rack unit 19"

44mm x 483mm x 200mm



PRICE EXL VAT: 2.300,00 €
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KEM Systems Ltd
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Design & Implemented Site: ClickMedia

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4 Krimeas str. Ampelokipi 11526
210 - 67 48 514
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