|FRABTEK||Bundle including the J2100A Injection Transformer and J2120A Line Injector||
|FRAB1P5||Bundle including the J2100A Injection Transformer, J2120A Line Injector and VRTS1.5 Demo Board||
|Optional: J2110A||Solid-State Injection Transformer and Line Injector||
The Picotest FRA Bundle for the Tektronix 6 Series includes both of the injectors you need to take full advantage of the Tektronix 5-PWR or 6-PWR software capability. It allows Bode Plot/Stability and power supply rejection ratio (PSRR) measurements to be made.
Breaking the loop is an essential aspect of the Bode Plot based stability measurement. The J2100A allows you to accomplish this in order to inject the stimulus signal from the Tektronix oscilloscope. With a bandwidth of 1Hz - 5MHz, the J2100A covers most power supply applications. The J2101A is available for applications in the 10Hz to 45MHz range. For applications requiring lower or higher bandwidths the optional J2110A solid state injector provides works as DC to well over 100MHz
For more information on Bode Plots please see the Solution Brochure #2 listed above.
While the injection transformer is a very wideband adapter, it is not useful for measuring ripple rejection (PSRR) of a power supply or even an opamp. This is because the attributes that make the injection transformer perform so well also result in a transformer that is intolerant of DC current. Even very small DC currents (5mA or less) can greatly reduce the signal capacity or even totally saturate the transformer. For this reason, the Picotest line injector (J2120A) is another essential test adapter. The J2120A line injector allows the input DC supply voltage to be modulated by the network analyzer source signal, as in the case of a PSRR measurement. The line injector must be capable of a frequency range well below the AC line frequency and at least above the control loop bandwidth of the circuit being tested. For more information on using the J2120A and performing PSRR measurements please see the J2120A page and our PSRR Solution Page.
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