R&S SMC100A Description of Individual Diagram Blocks
1411.4077.62 2.3 E-1
Modulation block
The internal and external analog modulations are configured and activated in the Modulation block.
The
MOD ON/OFF key switches the active modulation(s) on/off.
The internal modulation sources are configured in the Mod Gen block. External amplitude, frequency or
phase modulation signals can be fed in at the input connector MOD EXT on the front of the instrument.
An external pulse signal is fed in via the BNC connector PULSE EXT on the rear of the instrument. AC
or DC coupling for external feed is possible.
Available internal and external analog modulation modes are:
• Amplitude modulation (AM)
• Frequency modulation (FM)
• Phase modulation (PhiM)
• Pulse modulation (PULSE)
Note:
An activated frequency modulation disables phase modulation and vice versa. For modulation
modes that can be simultaneously used, refer to the R&S SMC data sheet.
The status line in the block displays the active modulation(s).
RF block
The RF parameters and frequency/level sweep settings are set in the RF block.
An active sweep is displayed in the statusline of the block. The
RF ON/OFF key switches the RF signal
on and off. When the RF signal is switched off, the switch before the RF output symbol is open.
The RF 50 output connector on the front of the instrument provides the output of the RF signal. An
external trigger/gate signal for sweeps is input via the INSTR TRIG connector on the rear of the
instrument.
RF settings include:
- Frequency and reference frequency
- Level settings; if required.
- Frequency and level sweep.
Hint:
Set the frequency or level values directly in the entry fields of the status bar either
- by pressing the
FREQ or LEVEL buttons on the front panel of the instrument or
- by clicking on the Frequency or Level keys in the key emulation dialog.
Alternatively the values are set in the dialogs RF / Frequency / Phase or RF Level / EMF.
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