Picotest J2113A / J2130A / J2140A Injectors
Picotest J2113A Semi-Floating Differential Amplifier - Ground Loop Breaker
KEY FEATURES:
- Eliminates DC ground loop down to 1Hz
- Works up to 800MHz (-3dB)
- Supports the 2 Port Shunt Thru impedance measurement required for Power Distribution Networks (PDNs)
- Works with all types of test equipment to eliminate ground loops, such as Network Analyzers, Oscilloscopes and Spectrum Analyzers
- Popular for oscilloscopes - isolate probe grounds - J2113A is optimized for pulse response
- Perfect for component measurements
- Excellent CMMR performance
- What's included:
- J2113A Semi-Floating Differential Amplifier - Ground Loop Breaker
- J2170B High PSRR Power Adapter
- 1 Year Warranty
The J2113A is a solid-state Semi-Floating Amplifier (SFA), or ground loop isolator, that provides the BEST isolation for low impedance measurements. The J2113A removes the groups loops associated with VNAs and Oscilloscopes which occur in many different types of test setups. The ground loops are often subtle or hidden and can impact the measurement results dramatically if not accounted for. The J2113As frequency response, as shown below, is flat from DC to over 800MHz, all while maintaining 50Ohm impedance at both the input and the output for accurate, low-noise measurements. It allows measurement both lower and higher in frequency than achievable with a Common Mode Transformer. The J2113A supports power distribution network (PDN) measurement, component measurement, PSRR testing and many other applications.
Picotest J2130A DC Bias Injector
KEY FEATURES:
- 10Hz-10MHz usable bandwidth Low loss design
- Easily measure varactors, junction capacitance
- Measure X5R capacitor voltage sensitivity
- Bias low power transistor amplifiers and diodes for parameter extraction
What's included:
- J2130A DC Bias Injector
- User Manual
- 1 Year Warranty
When using the network analyzer to measure impedance, such as the capacitance and ESR or a capacitor, or the DCR of an inductor, etc., it is often necessary to provide a voltage bias to the device being tested. This is true of semiconductor junction capacitances, varactors, and some ceramic capacitors (especially X5R). In these cases the impedance is a function of the DC bias on the device. The Picotest DC bias injector (J2130A) is used for this purpose during impedance measurements.
Picotest J2140A Attenuator
KEY FEATURES:
- Integrated unit includes 40dB, 20dB and 10dB
- Cascade for greater attenuation
- Improve noise floor or assure small signal measurement
What's included:
- J2140A Attenuator
- User manual
- 1 Year Warranty
There are two common uses for attenuators when used in conjunction with the network analyzer. One is to attenuate the oscillator source signal. While this may seem odd, one of the most common errors in analyzer measurements is using a source signal that is too large. Even though the analyzer allows setting of the signal output amplitude, the lowest setting is often too high to allow an accurate small-signal measurement to be made. The correct amplitude is the smallest amplitude that exceeds the noise floor.
Attenuators are also useful for improving the dynamic range of the measurement. In some cases, as in measuring the open loop gain of an opamp as one example, the low frequency loop gain will be extremely large (100dB or more is not uncommon). Attenuating the output signal increases the effective range of the measurement.
