RF Signal Generator Power Output

Power output is an important metric for RF generation. Both analog and vector generators are typically specified for their peak power output in CW mode. Here are the max output powers by model or series:

Max Power output in performance range (dBm) in CW mode

These values are for the performance or specified range. By virtue of their design, these generators have additional capabilities for higher power output at the top of the dac setting. These can not be specified and can be non linear, but as an example, here is the CW Signal Maximum Output Power vs Frequency (f ≥ 1 MHz) for the SSG6082A-V:

Even though the specified range for the SSG6082A-V maxes out at 24 dBm, it is possible to get up to 30 dBm at certain frequencies by utilizing the space beyond the specified range.

The minimum output levels are also important in many applications. Above 100 MHz, the output minimums are:

The SSG5000A series RF generators have a factory installed option that must be selected at purchase time. This is the SSG5080A-LP option.

This option adds a step attenuator and additional calibration to the RF output of the instrument allowing it to accurately output lower power levels.

Here are the max and min calibrated power levels by frequency for the models without and with the step attenuator:

As you can see, the max power profiles are very similar. But the lower level output values are significantly different thanks to the added range of the step attenuator.

It is also important to highlight the step up at 6 GHz. The standard model minimum power goes from -20 dBm to -15 dBm and the LP model minimum power goes from -130 to -125 dBm. It is important to note these calibrated power limits especially when sweeping across the 6 GHz mark.

One additional method for extending the power profile for a target application is the power meter level control feature. Using this feature and a USB power meter an external attenuator or amplifier can be added to the instrument and calibrated into the system. This helps to guarantee optimal accuracy at the device under test and extend the power profile into additional areas of power over frequency.

Level Control is an advanced function that utilizes the power meter in live measurements using an RF splitter. A typical setup might look like this:

You can learn more about this function in our power meter control note or the user’s manual.

Selecting the correct options and having the correct test setup for accurate RF signal generation will make an important difference in breadth of power level accuracy in the application.