Configuring the Signal in the RF Domain
R&S
®
SMW200A
454User Manual 1175.6632.02 ─ 16
To find the physical Location of the LO In/Out connectors
The LO IN and LO OUT connectors are located on the rear panel. To find out the exact
position, proceed as follows:
1. In the block diagram, select the T/E/L/P/V status LEDs.
2. Select "RF Connectors" > "LO IN" > "Find".
The "Rear" tab of the "Find Connectors" dialog indicates the position of the LO IN
connector.
See also Chapter 11.2.4, "RF Connectors Settings", on page 667.
To configure LO coupling with cascaded instruments to achieve phase coher-
ence
The LO Coupling function can be used to generate beamforming signals.
The test setups in the following examples represent possible applications and provide
information about the coupling modes set in the signal generators. For the configura-
tion via remote control, refer to the programming examples in Chapter 13.18.6,
"SOURce:FREQuency Subsystem", on page 1037.
Known Restrictions
If you cascade instruments or channels at frequencies below 200 MHz, that is in cou-
pled or external mode, make sure that:
●
All channels are equipped equally regarding option R&S SMW-B22, that means
each channel is equipped with or without the option.
●
The connection between the REF OUT of the first instrument and REF IN of the
subsequent instrument is established, see Chapter 7.4, "Reference Oscillator",
on page 441.
Frequencies below 200 MHz are generated using downconversion. Therefore the
coherence of the cascaded channels in this frequency range is not as good as at
higher frequencies.
The first test setup example represents all variants of the coupling modes, and
describes step-by-step how to configure each of the Rohde & Schwarz signal genera-
tors. The following examples show further conceivable test setups. To configure these
test setups, proceed similarly as shown in the first example.
Local Oscillator Coupling
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