• Picotest J2121A High Power Line Injector, 400V/20A
  • Picotest J2121A High Power Line Injector, view 2
  • Picotest J2121A High Power Line Injector, view 3
  • Picotest J2121A High Power Line Injector, view 4
1 4

Picotest

Picotest J2121A Hochleistungs-Leitungsinjektor

Picotest J2121A Hochleistungs-Leitungsinjektor
Professional-grade line injector for PSRR and impedance measurements in high-power military and satellite applications up to 400V/20A.

SKU: J2121A

£2,420.00 GBP exc tax
£2,420.00 GBP exc tax
Sale Ausverkauft
Versand wird beim Checkout berechnet
If no stock is shown above, order now and we'll dispatch within 7 working days.
Vollständige Details anzeigen
  • Picotest J2121A High Power Line Injector, 400V/20A
  • Picotest J2121A High Power Line Injector, view 2
  • Picotest J2121A High Power Line Injector, view 3
  • Picotest J2121A High Power Line Injector, view 4

Key Features

400VDC/20A maximum power handling capability
100Hz to 1MHz measurement bandwidth
Regulated 750mV voltage drop
Integrated current monitor output
Fan-cooled thermal management
Complete measurement package
Unity gain signal transfer

Overview

The Picotest J2121A High Power Line Injector enables precise power supply rejection ratio (PSRR) and input impedance measurements for high-voltage applications up to 400VDC and 20A continuous current. Designed specifically for military and satellite power systems, this advanced test instrument features regulated DC output with fixed 750mV voltage drop and integrated current monitoring for streamlined measurements.

Unlike passive injection transformers, the J2121A accommodates significant DC bias currents whilst maintaining measurement accuracy from 100Hz to 1MHz. The device includes an isolated current sense monitor output that connects directly to vector network analysers, eliminating external current probe requirements and reducing measurement uncertainty.

Complete package includes the J2171A 200mA low-noise power supply, 1Ω calibration fixture for measurement verification, and comprehensive user documentation. The fan-cooled design ensures reliable operation during extended test sessions, making it ideal for production environments and research laboratories requiring high-power PSRR characterisation.

Downloads

Why Engineers Choose the Picotest J2121A Hochleistungs-Leitungsinjektor

High-Power Capability

Enables PSRR testing of military and satellite power systems beyond conventional equipment limits

Measurement Accuracy

Integrated current monitoring and regulated voltage drop ensure precise, repeatable results

Complete Solution

Includes power supply, calibration fixture and documentation for immediate operational capability

Der Picotest J2121A Hochleistungs-Leitungsinjektor eignet sich besonders für Hochleistungsanwendungen, wie sie mit Militär- und Satellitenbussen verbunden sind. Er kann mit Eingangsbusspannungen bis zu 400 V verwendet werden und liefert bis zu 20 A bei 1 MHz. Der Leitungsinjektor ermöglicht die Modulation der Eingangs-Gleichspannung durch das Quellensignal (Oszillator) des Netzwerkanalysators.

Der Ausgang des Leitungsinjektors J2121A ist DC-geregelt und bietet zusätzlich zum AC-Modulationssignal einen festen Spannungsabfall von 750 mV von der in den Injektor eingespeisten Eingangsbusspannung.

Engineer Q&A

Questions and Answers

10 questions
  • What Frequency Range Does the J2121A Cover?

    The measurement bandwidth is 100Hz to 1MHz, covering power supply PSRR characterisation and DC-DC converter analysis.

    Answered by John LeggUpdated 12 Oct 2026
  • Is Calibration Required Before Measurements?

    Use the included 1 Ω calibration fixture for a through calibration, which corrects the scaling of the current monitor and probe connections.

    Answered by John LeggUpdated 12 Oct 2026
  • Can the J2121A Work with Oscilloscopes for PSRR Measurements?

    Picotest's manual says the current monitor output is intended for vector network analysers. Picotest also documents input impedance tests with the J2121A on a Tektronix 5/6 Series MSO.

    Answered by John LeggUpdated 12 Oct 2026
  • What Safety Precautions Are Necessary When Using the J2121A?

    Always observe the 400VDC maximum rating. Ground the unit properly, use suitable personal protective equipment, and check all connections before applying power. Safe operating procedures are essential.

    Answered by John LeggUpdated 12 Oct 2026
  • Does the J2121A Require External Cooling?

    No. The J2121A has integral fan cooling. Keep the area around the unit ventilated and don't block the cooling vents during operation.

    Answered by John LeggUpdated 12 Oct 2026
  • What Is the Maximum Voltage and Current the J2121A Can Handle?

    The J2121A handles up to 400VDC input voltage and 20A continuous current. It suits high-power military and satellite bus applications up to 270V operational voltage.

    Answered by John LeggUpdated 12 Oct 2026
  • How Does the J2121A Differ From the J2120A Line Injector?

    Compared with the J2120A, the J2121A has:

    • 8× higher voltage capacity (400V vs 50V)
    • 4× higher current rating (20A vs 5A)
    • Active voltage regulation with a fixed 750mV drop
    • Integrated current monitoring

    The J2120A offers ultra-low noise for sensitive low-power applications.

    Picotest J2120A Leitungsinjektor Picotest J2120A Leitungsinjektor
    £550.00
    Answered by John LeggUpdated 12 Oct 2026
  • What Equipment Is Needed to Perform PSRR Measurements with the J2121A?

    You need:

    • A vector network analyser or frequency response analyser, such as the Bode-100
    • The included J2171A power supply
    • A DC voltage source for your test voltage
    • The device under test

    High-impedance voltage probes are recommended for output measurements.

    OMICRON Lab Bode 100 Vektor-Netzwerkanalysator (VNA) OMICRON Lab Bode 100 Vektor-Netzwerkanalysator (VNA)
    £5,450.00     J2171A High PSRR Regulated Adapter J2171A High PSRR Regulated Adapter
    £253.71
    Answered by John LeggUpdated 12 Oct 2026
  • Can the J2121A Measure DC-DC Converter Input Impedance?

    Yes. The J2121A measures input impedance using its integrated current monitor output. This is essential for characterising negative resistance effects and checking power distribution network stability.

    Answered by John LeggUpdated 12 Oct 2026
  • What Is the Voltage Drop Through the J2121A?

    The J2121A provides a regulated input-to-output voltage drop of typically 750mV.

    Answered by John LeggUpdated 12 Oct 2026

Can't find your answer? Ask our engineers.

Ask a Question

Ask Our Engineers About This Product

Your question goes to the Debug Store technical team. We answer by email, and useful questions may be added to this page without your name or email address.

We reply within 24 hours.
137