12 Channel
Digital Attenuator
The MT-128A is a fully shielded, digitally controlled 12-channel RF attenuator covering 200 – 8000 MHz. PoE-powered with Ethernet or USB interface, programmable via browser or APIs — built for high-accuracy automated RF testing.
Frequency Range
200 – 8000 MHz
Channels
12 ch
Dynamic Range
95 dB
Step Size
0.25 dB
Connector
SMA Female
Power
PoE
Key Features
Built for precision
and automation
Every specification is engineered for repeatable, accurate RF control in demanding test environments — 12 channels, 95 dB range, 0.25 dB steps.
Broad Frequency Coverage
Attenuation from 200 MHz to 8 GHz for Wi-Fi up to 802.11be and GSM, UMTS, LTE-FDD, LTE-TDD and 5G FR1 testing.
95 dB Dynamic Range
0–95 dB attenuation range in 0.25 dB steps, with ±0.25 dB typical attenuation accuracy.
PoE Powered
Powered over Ethernet (PoE), with an Ethernet or USB control interface.
Browser & API Control
Programmable via browser GUI or APIs, in uni- or bi-directional mode. Custom APIs available as per user requirements.
Complete RF Shielding
Completely shielded — 110 dB shielding and 90 dB isolation between channels.
12-Channel Architecture
12 individual attenuator channels with 2 µs switching speed.
High Linearity
58 dBm input IP3 and 34 dBm 0.1 dB compression, with +28 dBm maximum operating input level.
Cross-Platform Software
Supports Windows, Linux and Mac OS.
Target Applications
Automated RF test
environments
From R&D characterisation to high-volume production testing — wherever programmable, accurate RF attenuation is needed.
Wi-Fi (up to 802.11be) & Cellular (GSM, UMTS, LTE, 5G FR1) Testing
Throughput vs. Range Measurements
Wi-Fi or Cellular Roaming Measurements
Mesh & Band-Steering
Receiver Sensitivity Measurements
System Design & Device Verification Testbeds
Engineering Development & Automated Manufacturing Test
Specifications
Technical Data
Complete performance data for the MT-128A.
Electrical Characteristics
| Parameter | Condition | Min | Typ | Max | Unit |
|---|---|---|---|---|---|
| Frequency Range | — | 200 | — | 8000 | MHz |
| Impedance | — | — | 50 | — | Ω |
| Channels | — | — | 12 | — | — |
| Attenuation Range | — | 0 | — | 95 | dB |
| Shielding | — | — | 110 | — | dB |
| Isolation between Channels | — | — | 90 | — | dB |
| Step Size | — | — | 0.25 | — | dB |
| Insertion Loss | < 2.5 GHz | — | 5.5 | 7 | dB |
| Insertion Loss | < 6 GHz | — | 7 | 8 | dB |
| Insertion Loss | < 8 GHz | — | 9 | 11 | dB |
| Attenuation Accuracy | — | — | ±0.25 | ±1.5 | dB |
| Switching Speed | — | — | 2 | — | µs |
| Maximum Input Level | Operating | — | +28 | — | dBm |
| Maximum Input Level | Absolute max | — | +33 | — | dBm |
| Input IP3 | — | — | 58 | — | dBm |
| 0.1 dB Compression | — | — | 34 | — | dBm |
| Operating Modes | — | — | Uni / Bi-Directional | — | — |
| Control | — | — | GUI control or APIs | — | — |
| Power | — | — | Power over Ethernet (PoE) | — | — |
| Operating Temperature | — | −30 | — | +70 | °C |
| RF Connectors | — | — | SMA | — | — |
| Control Interface | — | — | Ethernet or USB | — | — |
| Operating System | — | — | Windows, Linux and Mac | — | — |
| Custom APIs as per User Requirements | — | — | Yes | — | — |
Need a different channel count?
Available in 1, 2, 4 and 8-channel configurations across three frequency bands, plus 12, 16 and 24 channels at 8 GHz.
Contact engineering