SYSTEM DESCRIPTION

GENERAL INFORMATION

MS4782X Test Set The Series MS4782X Test Set contains a Wilkinson type combiner that combines the two RF signals from Ports 1 and 3 (RF1 & RF3) of the Scor- pion. External preamplifiers can optionally be provided at the combiner input to boost the input RF power to the amplifier-under- test (AUT). The combiner has power input rating of 30-Watts maximum when terminated with a VSWR of 1.2:1. For an open or short at the combiner output, the combiner input power rating is 0.5 Watts maximum.

The output of the combiner is fed to a source selection switch that enables one of the following to be applied to the AUT:

￿The combined signal from the Scorpion sources.

￿A modulated signal from an optional external modulation synthe- sizer.

A provision for the insertion of an optional external pre-amplifier (after the combiner and source selection switch) is also provided. Refer to Chap- ter 7, “Preamplifier Operations,” for details.

The test set includes a bi-directional coupler at the input of the AUT that separates the incident signal from the reflected signal. The power rating of this bi-directional coupler is 100 watts average. The –30 dB portion of the incident and reflected signals are applied to the Scorpion reference port a1 and test port b1, respectively, for S11 measurement. The S11 mea- surement determined by the DRA Scorpion is simply the ratio of the re- flected signal to the incident signal.

The amplified output of the AUT is fed to a high power coupler in the test set. The power rating of this coupler is also 100-watts average. The –30 dB coupled arm of this coupler is routed to the test port b2 of the Scorpion through a 6 dB resistive divider and a 0-dB to 70-dB step attenuator (10dB/step). A limiter is also provided in this path provide added protec- tion for the Scorpion reference channel .

The divider enables the connections of a power meter or Spectrum Ana- lyzer, when desired, to measure the AUT b2 output.

The through arm of the 100-W coupler is routed to a high power

(100-Watt) termination through a circulator. In the MS4782A Test Set, the circulator is internal and has a rating of 100 watts average. This circulator has an isolation specification of 20-dB minimum. This means that the AUT output power is attenuated by 20 dB (plus other losses) be- fore reaching the Scorpion port 2. Since the maximum (no-damage) power level for this port is 27 dBm (0.5 watt), this establishes the maximum AUT output power at 50 watts.

In the MS4782D Test Set, the circulator is external as shown in Figure 1-2. In selecting an external circulator, the following criteria should be used.

￿Power rating: Should be no less than the power output of the ampli- fier-under-test (AUT). It should be noted that a 100 watt termina- tion is provided in the Test Set for the termination port of the exter- nal circulator.

1-6

ME 7840A OMM

Page 16 Page 18
Page 17
Image 17
Anritsu ME7840A manual System Description General Information
Page 16 Page 18

ME7840A specifications

The Anritsu ME7840A is an advanced test solution designed for characterizing and verifying the performance of wireless devices. With the rapid evolution of communication technologies, specifically in the realms of 5G and beyond, the ME7840A plays a crucial role in ensuring that devices meet the rigorous standards required for modern connectivity.

One of the primary features of the ME7840A is its high-performance vector signal analysis. It supports a broad spectrum of modulation formats, making it an ideal choice for testing a wide variety of wireless communication technologies. This includes LTE, NR (New Radio), Wi-Fi 6, and more. The system is capable of handling both uplink and downlink tests, providing a comprehensive solution for manufacturers looking to optimize their devices' performance.

Another key feature is its modular architecture, allowing for extensive customization based on specific testing needs. This flexibility means that users can mix and match different modules to create a tailored test setup that suits their particular requirements, whether they are focused on RF parameters, protocol conformance, or more specialized tests.

The ME7840A also integrates several advanced measurement technologies. For instance, its real-time signal analysis capability enables users to conduct in-depth examinations of complex signals, offering insights that can drive innovation and improve device reliability. Furthermore, this platform supports high-speed measurements with high accuracy, ensuring that manufacturers can achieve precise results in their testing processes.

Moreover, the ME7840A is equipped with automation features that streamline the testing process, significantly reducing the time and effort required to conduct tests. The system can be integrated into automated test environments, which is a key advantage for manufacturers seeking to enhance their production efficiency.

The Anritsu ME7840A's user-friendly interface also deserves mention. This accessibility ensures that engineers can quickly learn how to operate the system, allowing them to focus more on their testing objectives rather than on navigating complex software.

In summary, the Anritsu ME7840A is a versatile and powerful test solution that meets the diverse needs of the wireless industry. With its robust features, modular design, advanced measurement capabilities, and automation options, it is an essential tool for manufacturers aiming to stay competitive in today's fast-paced technology landscape.
Top Page Image Contents