Test Solutions for Mobile and Wireless Communication
Cost-reduction in the design and verification phase
Devices for mobile communication, such as mobile phones and wireless networks have become articles of daily use. These devices grow constantly in their complexity, similarly to the corresponding radio transmission standards. Components of mobile communications are also increasingly used in automobiles to increase driving comfort and safety. This trend requires extensive testing of new developed devices regarding their compatibility with various wireless standards.
Emulation of Air Interfaces
The emulation of air interfaces can be effected by varying the signals on RF level or also in the baseband. The latter require a demodulation with subsequent modulation in the signal chain. The emulation of air interfaces in the RF level occurs exclusively by variations of the amplitude and / or the propagation time of the RF signals themselves. The information contents (modulation) remain unaffected.
QATT – Programmable Attenuators
With the aid of the QATT devices, field strength scenarios with four independent RF channels are possible.The QATT device is usable in cellular and broadcast applications up to 4 GHz. For wireless networks WLAN 802.11 a / h, b, g, n, p, Bluetooth, ZigBee, 5G and radar applications the device QATT-7G is available.
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LAN remote interface |
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USB remote interface |
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Web-interface |
QDLL – Quad Delay Line
The device QDLL is a 4-channel programmable delay line for the frequency range 250 MHz ... 4000 MHz. Each RF channel provides a setting range of 0 ... 1700 ps and is adjustable in 5 ps steps.
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LAN remote interface |
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USB remote interface |
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Web-interface |
AIE-4X4ER – Air interface Emulator
The AIE-4X4ER is a 4 to 4 port radio field simulation for the generation of handover test scenarios.
AIE-W5ER – 5 Port Car-to-X Emulator
The AIE-W5ER is a radio field simulator for Car-to X applications. Each RF port is designed for bidirectional operation and is connected to each of the remaining ports via adjustable attenuators. The device is designed for operation from 400 MHz up to 6400 MHz and thus also suitable for the WLAN standard IEE 802.11p in V2X and V2V applications (5.850 to 5.925 GHz).
AIE-S6R – Cellular Handover Emulator
The AIE-S6 is especially designed for handover scenarios between the mobile bands such as LTE, UMTS and GSM. The device contains band-selective filters for the various mobile radio bands. Via adjustable attenuators, the levels of each mobile radio band can be varied in fine steps via a remote control interface. With the AIE-S6, Roaming scenarios can be produced reproducibly in laboratory environments.
Frequency Ranges |
AIE-S6 |
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LTE Band 28 |
703 … 748 MHz |
758 … 803 MHz |
LTE Band 20 |
791 … 821 MHz |
832 … 862 MHz |
E-GSM900 Band |
880 … 915 MHz |
925 … 960 MHz |
GSM1800 Band |
1710 … 1785 MHz |
1805 … 1880 MHz |
UMTS Band |
1920 … 1980 MHz |
2110 … 2170 MHz |
LTE Band 7 |
2500 … 2570 MHz |
2620 … 2690 MHz |
Insertion loss |
12 dB @ 0 dB ATT |
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Attenuation range |
0 … 31.75 dB |
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Resolution |
0.25 dB |
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Port load capability |
+33 dBm |
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LAN remote interface |
✓ |
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USB remote interface |
✓ |
Frequency Range
For universal use, the operating bandwidth should be as large as possible. The system should be suitable for all components of e.g. such as GSM800, GSM900, GSM1800, GSM1900 UMTS, LTE.
Port Load Capability
The load capability of the RF ports shall be match to the connection of cellular phone and wireless network devices.
Accuracy of Adjustment
Reproducible results will ensure by fine resolution with high accuracy in adjustment.
Port-Decoupling
High decoupling properties of the RF ports ensure a sufficient suppression of adjacent test pieces to avoid mutual interference.
Remote Control
Via remote control interfaces, such as Ethernet LAN or USB, the radio field simulations can be integrated into automatic test sequences. Many devices are additionally equipped with web interfaces, which provide a location-independent control of the devices without additional software on the user's side.
Robust Design
In production and development, high quality and availability of the RF signal is immeasurably. The components comply with these requirements and are designed for longstanding operation.
Latest modification: 17.05.2021