Full View NAM-ULTRA (Example)

eubus NAM-ULTRA Network Attenuator Module

Product Description

The NAM-Ultra is an ultra-compact, economical version of the traditional EUBUS-NAM's. Inputs and outputs of the field-proven electronic Eubus attenuators are directly accessible at the rear of the system - the reduced internal RF-interconnect leads to higher reliability, better RF-performance and ease of service. This Eubus-NAM always comes with eight RF-attenuators with either 3 GHz or 6 GHz upper freqency limit. The Ethernet interface allows for microprocessor control of all eight attenuator. Firmware can be easily updated through the RS-232 service port. The entire unit requires 2 HU in 19" racks and is just 125 mm deep.

Processor control permits to runmultiple tests in parallel time-independently. High-precision attenuation is possible in 0,5dB (0,38-3GHz) or 1 dB (0,7-6GHz) increments in the range of milliseconds. All time settings, test lengths and attenuation value settings are adjustable. The attenuation values appear on the device's display and can be queried at any time using the operating software.


  • Designed for easy to use radio hop simulation and handover test scenarios
  • High-precision attenuation in 0,5dB or 1dB increments
  • eight high-precision attenuators
  • eight individual inputs and outputs
  • Extremely fast - works in the millisecond range
  • Attenuation and offset to be controlled remotely by means of terminal programs or web browser
  • Firmware update function implemented (over Ethernet)
  • Small attenuation steps.
  • Suitable for any laboratory or field application
  • Very flexible and adaptable system for most applications
  • Compact, stable housing

The NAM-ULTRA system was designed to simulate the conditions of a radio hop in all current and future radio networks including GSM, DCS, UMTS, WLAN, WiMAX, Bluetooth and UMTS LTE, for example. The system offers eight inputs and outputs, works in the millisecond range, and can be used either in the laboratory or as a mobile unit in field applications.

Download: Product data (pdf)

Technical Data of NAM

Frequency range: 380MHz - 3GHz or 700MHz – 6GHz
Attenuation: up to 95,5dB in 0,5dB increments / up to 63,0dB in 1,0dB increments (6GHz)
Insertion Loss: < 6dB (1GHz), < 7,5dB (6GHz)
Impedance: 50 Ohm
RF Connection: SMA
Input Power: Maximal 100mW average
Frequency Bands: GSM (450, 900, 1800 MHz), UMTS, WLAN, WiMAX, Bluetooth and UMTS LTE
Mode of operation: Remote control over Ethernet (control software optional)
No. of Attenuators 8
Power Supply: 100V – 240V, 47Hz - 63Hz
Ambient Temperature: 0 through + 50°C
Housing: 19” aluminium with 2U
Delivery Package: NAM-ULTRA system, power cable
Warranty: 12 months

Customer specific versions are available on request.

Ordering Information

  • NAM-ULTRA (8 attenuators, 8 input & 8 outputs)

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