Beschreibung

The Picotest J2123A negative voltage line injector, like the J2120A positive voltage line injector, is used to superimpose an AC modulation signal on a DC source voltage for Power Supply Rejection Ratio (PSRR), Power Supply Modulation Ratio (PSMR), and Audio Amplifier Common-Mode Rejection Ratio (CMRR) testing. These applications require very low output noise, as well as a low output impedance over a wide bandwidth. The J2123A, like the Picotest J2120A (for positive voltages), achieves these difficult requirements using a passive design to assure optimum performance. The J2123A can be used in either time or frequency domain testing. Most often, the 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. A connection diagram using the OMICRON Lab Bode 100 is shown.
Note: The J2123A will be damaged if the input voltage is reversed. In a negative voltage system, the return jack (Black ground or 0 volts) should be more positive than the MINUS SUPPLY connection (Red).

•Negative voltage line injector
•Modulates a DC power source voltage
•Combines modulation signal with bus voltage
•Low impedance, low noise, and low voltage-compliance
•Easily measure input filters and PSRR

What’s included:
•J2123A Negative Voltage Line Injector
•User manual
•1 Year Warranty