Instrument Function > General Instrument Settings > General Configuration of Instrument - Setup Key > Internal Adjustments
Internal Adjustments

The R&S SMA is extremely accurate due to the integrated adjustment procedures, which you can execute directly on the instrument.

Self-calibration routines that do require additional (external) measurement equipment are either described in the Service Manual of the instrument, or they require to be performed by a Rohde & Schwarz service center.

Risk of invalid adjustment

In order to achieve correct adjustment of the instrument, make sure that the instrument is warm before performing adjustments. The warm-up time is 30 minutes.

When to perform adjustments?

It is recommended to perform internal adjustments prior to any application that requires a maximum of level and frequency accuracy, especially when a long period of time has passed or if the ambient temperature of the instrument significantly differs from the one of the last adjustment.

Additional Information to the Adjustments

During adjustments, a progress indicator shows the status of the process. If any error occurs, the process aborts and an error message appears in the info line.

The extent of the adjustments depends on the installed options.

Risk of damage to the DUT

High power at the RF output may destroy a connected DUT (Device Under Test).

During level adjustments instruments without step attenuator, that means with frequency options R&S SMA-BxxxL, temporarily apply high power at the RF output. This may damage the DUT. Therefore, it is required that the RF connector is terminated during the adjustments.

Disconnect the DUT and replace it by a 50 Ohm terminating resistor.

 

To access the settings for internal adjusmtents, press the SETUP key and select "System > Internal Adjustments".

In this dialog you can perform internal calibration routines.

The remote commands required to define these settings are described in "CALibration Subsystem".

Adjust All

Performs all available internal calibration routines of the instrument.

Remote command: 
 
Adjust Synthesis

Performs all adjustments which affect the frequency.

This includes adjustment of following options:
  • R&S SMA-B20, FM/PhiM Modulator
  • R&S SMA-B22, Enhanced Phase Noise Performance and FM/PhiM Modulator
  • R&S SMA-B106/106L, Frequency Extension 6GHz with/without attenuatior.
Remote command: 
 
Adjust Level

Performs all adjustments which affect the level. The acquired correction values improve the settling time and the signal quality.

Remote command: 
 
Adjust LF Gen/Mod Gen

Performs all adjustments which affect the internal modulation generator.

Remote command: 
 
Adjust Clock Synthesis

Performs all adjustments which affect the clock synthesis.

Remote command: 
 
Adjust DME Pulse Slope

Activates internal adjustment of the DME pulse slope for best linearity.

Remote command: 
 

 


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