Rohde & Schwarz CMU 200 User Manual

CMU RF: Connection Control
1100.4903.12 4.63 E-10
Generator Con-
trol
Generator Control controls the RF generator and indicates its operating state (ON |
OFF).
This function depends on the selected Application (see above):
In the default setting (Application = Tx), Generator Control switches the primary
signal
Tx on or off. All Aux Tx generator settings are ignored.
If the additional signal Aux Tx is selected (Application = Aux Tx), Generator Control
switches the additional signal Aux
Tx on or off. All Tx generator settings are ig-
nored.
If both signals are selected (Application = Tx + Aux Tx), Generator Control
switches both signals on or off.
Remote Control
INITiate:RFGenerator
ABORt:RFGenerator
FETCh:RFGenerator:STATus?
The following modulation settings are valid for both the Tx and the Aux Tx signal.
Modulation –
Mode
Modulation – Mode selects the modulation scheme of the RF signal.
OFF Unmodulated (CW) RF carrier signal
SSB RF carrier is shifted by a constant AF offset frequency defined
with the AF Frequency softkey (Single Side Band modulation).
AM RF carrier is amplitude-modulated by means of AF signal with
constant frequency and modulation index set with the AF Fre-
quency and Modulation Index softkeys.
Note: The AM setting shifts the level ranges of all three RF outputs by –6
dB.
Remote control
SOURce:RFGenerator:MODulation OFF | SSB | AM
AF Frequency
AF Frequency defines an AF frequency which is used for SSB or AM modulation;
see Modulation softkey above.
If SSB modulation is set, the frequency of the RF carrier signal is shifted by the AF
frequency, which can be either positive or negative. If AM modulation is set, the RF
signal is amplitude-modulated with the AF frequency (which has to be positive) and
with a given modulation index (see softkey Modulation Index below). An application
for SSB modulation is given in chapter 7.
Remote control
SOURce:RFGenerator:MODulation:SSB:FREQuency <Frequency>
Modulation
Index
Modulation Index defines the modulation index for AM modulation, i.e. the ampli-
tude ratio of the modulating AM signal to the RF carrier signal in percent.
The modulation index is in the range of 0% (no amplitude modulation) to 100%.
Overmodulation is excluded.
Remote control
SOURce:RFGenerator:MODulation:AM:INDex <Mod_Index>

Rohde & Schwarz CMU 200 Specifications

General

Brand	Rohde & Schwarz
Model	CMU 200
Category	Test Equipment
Language	English