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
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