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1800W modular electronic loads for power tests Interpro Systems’ ML1800 Series of 1800W modular electronic loads features an 8-in. TFT LCD colour display with multiple language selection that is visible at a distance. The 6-slot chassis is rated at 1800W and can be specified with up to six 300W or three 600W modules. Modules are available with current ratings of 60 or 120A with voltages up to 80V; or 10 or 20A with voltages up to 500V. The load offers CC, CV, CR, CP, short circuit, battery and LED operating modes, 20 kHz transient test speeds with programmable rise, dwell and fall times, inductive load and capacitive load simulation, for testing of power Oscilloscope probes for high-voltage signal measurements Keysight Technologies has introduced 200-, 300- and 500-MHz, high-voltage probes with a wider input range, higher commonmode rejection ratio and optimised accessories, for testing switching power supplies or power devices and for measuring motor drives and vehicle buses. The N2804A differential probe has up to 300-MHz bandwidth and ±300-Vdc + peak AC of the maximum differential input range, allowing engineers to use it for a broad range of power applications. The N2805A 200-MHz differential probe comes with a 5-m input cable, which allows engineers to easily reach DUTs over long distances. The probes have a differential input resistance of 4 MΩ and low input capacitance of 4 pF to minimise circuit loading. The N2804A and N2805A probes are compatible with Keysight oscilloscopes with a 50-Ω AutoProbe interface, which automatically supplies, batteries, LEDs, adaptors and converters. 16-bit programming and measurement resolution lets the ML1800 be operated as standalone instrument as well as having the capability to be integrated into a larger test system. It offers 10 user-programmable stored test sequences of up to 10 steps each. Programs can be run once, continuously looped or run once and then chained to other programs to provide very complex loading profiles. Test modes can be changed without turning off the load input. This allows the ML1800 series to more accurately simulate load testing applications. Turn-on capacitance and inductance simulation is easily performed using the CC Rise and CV Rise modes. Interpro www.inteproate.com Probes plus software enhance impedance configures the scope for the probe. The Keysight 10076C 100:1 passive probe with 66.7-MΩ input resistance provides the voltage and bandwidth engineers need for making high-voltage measurements referenced to the ground with low input loading. The probe provides 500-MHz bandwidth when used in conjunction with a spring ground tip to reduce inductive ground loading. Keysight www.keysight.com measurements To minimise circuit loading, Picotest has developed two transmission line probes that the company calls PDN probes. The company also introduced software for the Keysight E5061B VNA designed specifically for impedance measurements. Characterising PCBs and components for signal integrity and power integrity often requires highspeed measurements in both the time and frequency domains. Because of high-frequencies, test equipment can load circuits and influence measurement results. The 1-port and 2-port PDN passive probes have, as you’d expect, 50 Ω impedance. According the Picotest, measurement of power distribution network (PDN) impedance for FPGAs generally requires the measurement of impedance levels in the milliohm range at frequencies over 1 GHz. The probes add less than 1 pF of capacitance to measurements and have a rated bandwidth of 1.3 GHz. The unity-gain 1-port probe lets you measure ripple and noise produced by switching power supplies in powerdistribution connectors on your board while maximising SNR (signal to noise ratio). You can use either the 1-port or 2-port probes to inject noise into your power supply, which lets you test sensitive circuits such as clocks and LNAs for how they perform under controlled noise conditions. The bidirectional 2-port probe can transmit a load-current step through one port while measuring the response from the other port. The VNA software automates the process for making NISM (non-invasive stability measurements). Picotest www.picotest.com LeCroy releases 100 GHz real-time oscilloscope for R&D Previewed in a number of demonstrations since July 2013, LeCroy has now formally released its 100 GHz, 240 Gsample/sec LabMaster 10-100Zi oscilloscope, aiming it a engineers working on next-generation communication systems. This introduction, says Teledyne LeCroy, “continues to demonstrate a long running commitment to leadership in the high end oscilloscope market by aggressively pushing real-time bandwidth and sample rate boundaries”. The LabMaster 10-100Zi is the newest acquisition module in the LabMaster 10 Zi Series of high-performance modular oscilloscopes. LabMaster 10 Zi is a modular and flexible platform that allows users to build oscilloscopes with high channel counts, even when only one or two channels are in the base model. LabMaster 10 Zi oscilloscopes are built from a single LabMaster Master Control Module (MCM-Zi) that contains the display, control, and ChannelSync clock distribution architecture; all managed by a server-class CPU. Users connect up to 20 acquisition modules, including the LabMaster 10-100Zi, in order to build oscilloscopes with up to eighty channels at 36 GHz, twenty channels at 100 GHz, or anything in between. The LabMaster 10-100Zi was, the company says, recently used by Alcatel-Lucent to demonstrate the highest-bandwidth coherent optical receiver capable of detecting a 160 GBaud QPSK signal. Teledyne LeCroy www.teledynelecroy.com www.electronics-eetimes.com Electronic Engineering Times Europe December 2014 31


EETE DEC 2014
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