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.





Frequency range

100 kHz … 4000 MHz

100 kHz … 7000 MHz

Number of channels



Insertion Loss

6 dB, f ≤ 1 GHz

8 dB, f ≤ 5 GHz

Setting range

0 … 100 dB

0 … 95.25 dB


0.5 dB

0.25 dB

Port load capability

+27 dBm

+24 dBm

LAN remote interface

USB remote 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.




Frequency range

250 MHz … 4000 MHz

Number of channels


Insertion Loss

6.5 dB

Setting range

0 … 1700 ps per channel


5 ps

Port load capability

+33 dBm

LAN remote interface

USB remote interface




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


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


1920 … 1980 MHz

2110 … 2170 MHz

LTE Band 7

2500 … 2570 MHz

2620 … 2690 MHz

Insertion loss

12 dB @ 0 dB ATT

Attenuation range

0 … 31.75 dB


0.25 dB

Port load capability

+33 dBm

LAN remote interface

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.



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