As modulation signal, you can either use the signal of the internal pulse generator or an externally supplied signal. In case of external source, the external signal is input via the PULSE EXT connector at the rear of the instrument. In case of internal source, this connector can be used as external trigger or gate signal input for internal pulse modulation. The polarity and input impedance of the connector can be selected.
The pulse signal is output at the PULSE VIDEO connector at the rear of the instrument.
![]() | When pulse modulation is activated, the R&S SMC deactivates ALC automatically ("ALC OFF", i.e. switches to "Sample & Hold" state). The "Sample&Hold" state opens the ALC loop, and disables the automatic control of the output level. The level modulator is set directly. However, to correct the output level, the R&S SMC executes a "Sample & Hold" measurement after each change of frequency or level settings. The level is decreased by 30 dB during "Sample & Hold" measurement. |
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