Configuring the RF Signal
R&S
®
SMW200A
486User Manual 1175.6632.02 ─ 30
Out State
Activates or deactivates the LO output.
"B On / On" Note: Selection "B On" applies to two-path instruments, and "On" to
one-path instruments, respectively.
For coupling two instruments, the internal local oscillator signal is also
available at the LO OUT connector.
"Off"
The LO output signal is switched off.
Remote command:
[:SOURce<hw>]:FREQuency:LOSCillator:OUTPut:STATe on page 1127
Mandatory LO IN Frequency
Displays the frequency that must be applied as external LO frequency.
Remote command:
[:SOURce<hw>]:FREQuency:LOSCillator:INPut:FREQuency? on page 1126
LO OUT Frequency
Displays the current LO frequency at the LO OUT connector.
Remote command:
[:SOURce<hw>]:FREQuency:LOSCillator:OUTPut:FREQuency? on page 1127
Adjust LO Level at Current Frequency
Adjusts the level of the oscillator signal to optimum, if an external LO signal is applied.
See "To adjust the LO level to current frequency" on page 486.
The function is enabled in the following cases:
●
An external "LO Coupling Mode" is selected.
●
"Out State" is on ("B On" or "On").
Note: If your test setup consists of several cascaded Rohde & Schwarz instruments,
always use an external oscillator signal and start the LO level adjustment with the first
instrument. Continue in the order up to the last.
Remote command:
:CALibration<hw>:LOSCillator:COUPling:LOCal? on page 867
8.6.4 How to Configure Cascaded Instruments
This section describes how you can find out the location of the LO signal connectors
(LO In/Out). You can also find instructions for configuring the LO signals of several dis-
connected signal generators.
To adjust the LO level to current frequency
If you are working with an external LO signal, we recommend that you adjust the inter-
nal LO level to the optimum value.
To adjust the internal signal level, proceed as follows:
1. In the "LO Coupling" tab, select one of the following:
● "Mode" > "A External & B Internal"
Local Oscillator Coupling
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