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 Whether you are developing, certifying or implementing LTE or WiMAX technology, troubleshooting functional and interoperability issues can be a challenge.
It can be difficult to determine what messages were sent, what events occurred, and the timing of those messages and events. Diagnosing the root causes of problems between layers often takes hours, days or even weeks. This results in delays in certification, late deployment, reduced credibility, added costs and lost revenue.
The breakthrough
Sanjole’s WaveJudge 4900 provides more information than any other tool about all aspects of wireless communications particularly upper layers through PHY activity.
Using the WaveJudge, you’ll be able to:
- Understand the interactions between the mobile station or user equipment and the base station at all layers
- Identify complex issues that cause interoperability problems
- Improve the performance of the overall wireless connection
- Verify base station behavior from an over-the-air interface, including complex antennae and modulation schemes
- Evaluate the impact on performance of MIMO, beamforming and scheduling
- Capture wireless conditions in the field for replay in the lab
- Accurately identify anomalies that effect throughput and delay
With its ability to provide such insights, Sanjole’s WaveJudge 4900 will help you reduce troubleshooting time from hours to minutes. The WaveJudge is the esssential test and measurement tool for effective LTE and WiMAX troubleshooting and optimization.
 Powerful hardware-based features
Four independent configurable ports
The WaveJudge 4900 architecture supports four independent ports. Each can be configured as either a receive (RX) or transmit (TX) port, supports AGC to allow accurate reception of DL/UL signals with a wide range of power levels, and has its own radio and internal resources.
In addition, the ports can be driven either from the same or from separate low-noise highly accurate oven-controlled crystal oscillators (OCXOs), providing maximum flexibility in test configurations requiring multiple ports, such as:
- Tower handover
- Multiple-input multiple-output (MIMO) solutions including transmit diversity, spatial multiplexing, and UL Collaborative with rank measurements
- Co-channel interference across multiple sectors
Automatic gain control
The WaveJudge uses Automatic Gain Control (AGC) to adjust reception sensitivity on each port. This ensures proper capture of varying DL/UL signals for every test. Not only does this simplify test set up and free more ports to test features such as MIMO or beamforming, but it makes field testing in challenging environments possible.
Baseband interfaces
The WaveJudge 4900 supports baseband interfaces. Baseband IC designers can validate signal quality before going through the up-conversion chain. RFIC designers can get insight into the signal quality by comparing the down-converted analog IQ signals with the received RF signal. System integrators can evaluate the transition between the BBIC and RFIC using a common platform, user interface and modulation analysis solution. Dual 16-bit A/D capabilities combined with AGC provide an excellent tool for noise floor and sensitivity measurements of chipsets.
Support for 400 MHz to 6 GHz
If you are developing systems for multiple markets, you will appreciate the wide range of frequencies supported by the WaveJudge 4900. This capability allows you to leverage your testing investment to cover multiple spectrum bands, including the 2.3 GHz band opened in the US in 1997, the 2.5 GHz band, the 3.5 GHz band opened up from satellite operators, and the 700 MHz spectrum targeted for release from television broadcasting.
 Superior dynamic range and sensitivity
The WaveJudge accepts a wide range of power levels for each spectrum. This means you no longer have to adjust your system to accommodate the test tool. If the system under test has a strong (or weak) signal, the WaveJudge adjusts to accurately and reliably read the signal.
Buffer or streaming capture
The WaveJudge 4900 offers two modes of message capturing. Capture up to 17 seconds @ 10 MHz of wireless communication for analysis or troubleshooting, or stream to an external storage device to track long-term trends or to isolate intermittent anomolies.
Keeping up with PHY
To test leading-edge technology, analyzers must be able to keep up with frequent changes in PHY specifications. Because of this, the WaveJudge defines the PHY in software rather than hardware enabling you to quickly customize the LTE or WiMAX PHY to meet specifications.
Left: With the WaveJudge, the LTE PHY (shown) or the WiMAX PHY can be customized to follow current and future specifications.
Configuring tests
The WaveJudge 4900 is controlled by a laptop or PC running WaveJudge software with a user-friendly test configuration GUI. With it’s strong visual emphasis, the GUI greatly simplifies the LTE or WiMAX test set up and provides quick graphic confirmation of the test configuration. This is very valuable when dealing with complex scenarios.
Testing LTE Technology
Testing WiMAX Technology
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