ISO



TV, Broadcast, Video, SAT
TV, Radio, Video, SAT

Modulation Sciences
TSCA189



Der TSCA-189 von Modulation Sciences ist ein
TV Sidekick-SAP- (Second Audio Program) Generator. Er verbindet die fünf Elemente, die für einen erfolgreichen SAP-Betrieb notwendig sind:
  • Subträgergenerator
  • Modulations-Monitor
  • Audioprozessor mit
  • BTSC-konformem dbx®-Rauschunterdrückungs-Encoder und
  • Sender-Tuning-Unterstützung

Modulation Sciences entwickelte den TSCA 189, um diese 5 aufeinander abgestimmten Geräte in einem einzigen Paket darzustellen.
Passend dazu angeboten wird der TSG (STV 784) , ein TV Stereo Generator, ebenfalls von Modulation Sciences.

Bitte fragen Sie nach den zusätzlichen Kosten für eine rückführbare ISO Kalibrierung.


Ein Datenblatt zu diesem Artikel finden Sie hier.
Eine vergrößerte Abbildung befindet sich hier.

English translation of German description:
The TSCA-189 made by Modulation Sciences is a TV Sidekick-SAP- (Second Audio Program) Generator. A sync lockable subcarrier generator, dbx noise reduction encoding, audio processing and peak deviation meter are all integrated into one box. A wideband noise source and AM detector are also provided for tuning the aural transmitter system for minimum synchronous AM.
The TSCA-189 fully conforms to the BTSC specifications for a SAP generator. The major necessary elements include:
  • A subcarrier whose average frequency can be locked to horizontal sync and remain locked regardless of the modulating signal
  • 50 Hz....10 kHz audio bandwidth
  • Noise reduction encoding employing the dbx® noise reduction system that won the approval of the EIA's (now the CEA's) multichannel sound committee

For compatibility with various aural exciters and to allow easy integration with stereo TV audio the TSCA 189 provides two methods of connection to your aural exciter. In the first method, called "Loopthrough", the composite baseband signal is fed into the unit, buffered, and mixed with the SAP subcarrier. The combined output then drives the wideband input of the aural exciter. In the other mode, a separate high level SAP signal can feed the "SCA" or auxiliary input of many aural exciters as well as STV-784WB Television Stereo Generator .

The audio processor portion of the TSCA-189 is explicitly designed for subcarrier modulation. It provides maximum intelligibility of dialogue and the best fidelity of music while delivering the greatest possible signal-to-noise ratio. Operation of the audio processor can be optimized for your needs by use of the separate broadband and high frequency limiter controls, as well as by setting the operating point of the compressor using the input level control.
  • Subcarrier unconditionally locked to horizontal sync
  • 50 Hz....10 kHz audio response
  • dbx® noise reduction for greater than 65 dB SNR
  • Built in modulation monitor
  • Integrated audio processor makes external processors unnecessary
  • Sufficient input audio gain to allow direct connection to telephone lines
  • Tuning aid minimizes aural transmitter synchronous AM
  • Established hardware - basic design proven in FM SCA service
  • Synthesized subcarrier generator can be programmed to other frequencies for TV SCA applications
  • Excellent RF shielding
  • Stable over a wide temperature range (0....50 degrees C)
  • Meets all requirements of EIA for SAP
  • Crystal control takes over in the event of TV sync loss
  • Muting circuit automatically switches off the subcarrier when audio is removed

Please find here the matching cable if available.

Please ask for the additional fee for a current and traceable ISO calibration.


Please find a corresponding data sheet here.
Please find an enlarged image here.


Modulation Sciences TSCA189

Maße/ Dimensions : 482mm (B/W) x 88mm (H/H) x 260mm (T/D)
Gewicht/ Weight: 5 kg



Geprüft / Fully tested:   712,81 INKLUSIV MWST / 599,00 NETTO
Gewährleistung: 1 Jahr
One Year Warranty


Ref. #: 1247812519 Modulation Sciences TSCA189
© by Helmut Singer Elektronik Vertriebs GmbH