Evaluation Engineering - 12
voltage range, up to 1,000 VDC," the spokesperson said. "We put
a lot of work into the built-in measurement capabilities specifically for the use of power-supply test. Integrated measurement,
custom sequences, and cutoff settings can all be programmed
from the front panel, which make it a very powerful as an electronic load and as a standalone power-supply evaluation tool."
The spokesperson said that in anticipation of its use in battery-testing applications, it features built-in functions to make
charge-discharge tests easier for engineers. For example, a cutoff
function can automatically shut off the load when meeting a
specified Ah, Wh, elapsed-time, or terminal-voltage condition.
400-W and 800-W supply series
Rohde & Schwarz's latest addition is the R&S NGP800 DC power
supply series, comprising five models with ratings of 400 W or
800 W, according to Philipp Weigell, director, product management, power products. "The two or four 200-W outputs can each
supply up to 64 V or up to 20 A," he said. "Electrically equivalent
and galvanically isolated outputs can be wired in series or parallel for up to 250 V or 80 A. Its software features many tools
intended to boost the user's efficiency."
Other supplies the company offers, Weigell said, include
the R&S NGL200 and R&S NGM200, which enable engineers
to analyze and optimize their battery-powered designs, and
the R&S NGP800 and the R&S HMP4040, which offer the high
NXP i.MX 6UL 696 MHz ARM CPU with FPU
Our smallest single board computer
measuring only 2.4" by 3.6" by 1.7"
Rohde & Schwarz R&S NGP800 DC power supply.
channel count and power density to serve applications involving
modern high-end FPGAs that demand high power distributed
over several lines.
"The specialty power supplies offer two-quadrant architecture:
this feature allows them to function both as a source and a sink
and simulate batteries or loads," Weigell said. "The power supply automatically switches from supply mode to load mode. As
soon as the externally applied voltage exceeds the set nominal
voltage, current flows into the power supply. This is indicated
by a negative current reading."
In addition, the supplies offer galvanically isolated, floating
channels. "The Rohde & Schwarz power-supply family consists
of instruments with up to four channels," Weigell said. "The
circuitry of each single channel is completely isolated from the
others; there is no connection to chassis ground. This makes it
easy to combine the channels to drive bipolar circuitries that
might need ±12 V, for example, and avoids any ground problems
in complex DUTs."
Power in PXI
Marvin Test Solutions offers
several PXI power products.
"Test-system size and footprint
are always a concern; therefore,
implementing solutions on the
PXI platform delivers size reduction and performance,"
said Jon Semancik, marketing director. "Configuration
flexibility is also valued, and
PXI provides the ability
to expand capabilities
Marvin Test Solutions
with minimal imGX1838 precision
pact to overall system
multichannel DC source.
Specific products include the GX3104 source-measure unit
(SMU) with four isolated, common-ground SMU channels;
4-quadrant operation (±20 V, ±1 A); seven current ranges (±2.5
µA to ±1 A full scale); up to 1-A capability on one channel; and
24-bit ADCs and 18-bit DACs.
The company also offers the GX1838 precision multichannel
DC source, which Semancik described as ideal for avionics and
high-voltage applications. It features eight high-density discrete
outputs, and three programmable voltage rails (14-bit resolution).
EVALUATION ENGINEERING SEPTEMBER 2020
8/10/20 3:17 PM
Table of Contents for the Digital Edition of Evaluation Engineering
By the Numbers
Editorial: MONEY! IN! SPACE!
Programmable Power: Sources and Loads Optimize Power across Applications Gamut
Mil/Aero Test: Enhancing Test in Defense and Aerospace
Automated Test: How to Choose an Electronic Load
Software-Defined Radio: Software-Defined Radio Enters the Limelight
Radar/Lidar: There is Less 'Under the Radar' These Days
Evaluation Engineering - 1
Evaluation Engineering - 2
Evaluation Engineering - 3
Evaluation Engineering - 4
Evaluation Engineering - 5
Evaluation Engineering - Editorial: MONEY! IN! SPACE!
Evaluation Engineering - 7
Evaluation Engineering - Programmable Power: Sources and Loads Optimize Power across Applications Gamut
Evaluation Engineering - 9
Evaluation Engineering - 10
Evaluation Engineering - 11
Evaluation Engineering - 12
Evaluation Engineering - 13
Evaluation Engineering - Mil/Aero Test: Enhancing Test in Defense and Aerospace
Evaluation Engineering - 15
Evaluation Engineering - 16
Evaluation Engineering - 17
Evaluation Engineering - 18
Evaluation Engineering - 19
Evaluation Engineering - 20
Evaluation Engineering - 21
Evaluation Engineering - 22
Evaluation Engineering - 23
Evaluation Engineering - Automated Test: How to Choose an Electronic Load
Evaluation Engineering - 25
Evaluation Engineering - 26
Evaluation Engineering - 27
Evaluation Engineering - Software-Defined Radio: Software-Defined Radio Enters the Limelight
Evaluation Engineering - 29
Evaluation Engineering - Featured Tech
Evaluation Engineering - 31
Evaluation Engineering - Tech Focus
Evaluation Engineering - 33
Evaluation Engineering - Radar/Lidar: There is Less 'Under the Radar' These Days
Evaluation Engineering - 35
Evaluation Engineering - 36