Transmission Test Set : Rohde Schwarz SFM

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Rohde Schwarz SFM
放大图片Rohde Schwarz SFM

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The Rohde & Schwarz SFM TV Test Transmitter is a flexible modular concept based on plug-ins (freely selectable). The is SFM suitable for a wide range of applications.By virtue of the highly compact design, a great number of different configurations can be implemented in a single SFM.

Depending on application and configuration, the SFM may be used as:

  • Multistandard signal generator providing vision and sound modulation signals for up to seven TV standards (B/G, D/K, L/L’, I, M, N, K1) including sound as is required by the dual-carrier method or NICAM-728 as well as an RF upconverter used as a tunable test signal source
  • RF upconverter with a maximum of three separately settable converters for adjacent-channel and intermodulation measurements
  • IF modulator comprising several vision/sound modulators to various standards equipped for use in multichannel and multistandard systems

The most important features of the SFM are:

  • Generation of TV RF/IF signals (vestigial sideband amplitude modulation) to specified standards
  • All vision and sound modulation parameters variable in wide ranges about standard values
  • Vestigial sideband filter (SAW) and group-delay precorrection can be separately switched on/off
  • Double-sideband test modulator for all IFs between 32 MHz and 46 MHz
  • RF upconverter from 5 MHz to 1000 MHz; suitable for back-channel operation in analog and digital modulation modes
  • Switchover between upper and lower sideband at RF
  • Maximum RF output level from +10 dBm to 0 dBm depending on operating mode (optimum signal-to-noise and signal-to-intermodulation ratio)
  • Non-interrupting level reduction down to -14 dB
  • RF frequency resolution 1 kHz or 1 Hz for precision offset
  • Frequency locking for all oscillators via internal 10 MHz reference frequency or external precision reference frequency
  • RF output impedance 50 Ohm (female N) or optional 75 Ohm (female BNC)
  • AF generator, 30 Hz to 15 kHz, and stereo/dual-sound coder (IRT/Korea)
  • Wideband audio input for BTSC signals up to 120 kHz (standard M)
  • NICAM QPSK modulator with generator for frequencies from 0 Hz to 15 kHz, adjustable BER, PRBS and I/Q test sequences
  • NICAM intercarrier output adjustable between 5 MHz and 9 MHz, digital data/clock inputs/outputs for 728 kbit/s
  • Instrument settings storable in internal memory or on memory card (PCMCIA)
  • System-compatible due to IEC/IEEE-bus and RS-232-C interface
  • Connectors for external keyboard and external monitor

 

  • 制造商: Rohde Schwarz
  • 模型: SFM