Supported Protocols

Multi-Protocol Scanner:

The DRT4311B/MPS (Multi-Protocol Survey) application is an easy-to-use survey tool to detect and characterize active cellular networks.  By simultaneously supporting a number of modern 2G, 3G and 4G technologies including GSM, cdma2000, 1xEV-DO, UMTS WCDMA, TD-SCDMA and LTE, the MPS application facilitates a rapid assessment of the network environment.  Insights gained through an accurate survey facilitate mapping the network topology and help establish requirements for sustained operations.

The intuitive user interface allows the operator to quickly select predefined frequency / technology band definitions for survey (which cover a majority of worldwide commercial networks deployments).  For those instances when a predefined configuration does not cover the band of interest, the operator can also customize the survey parameters.  Survey results are presented using a variety of visualization methods that allow the operator to quickly understand the network environment.  Additional network details are provided through decoded overhead parameters providing even greater insights.

A spectrum analyzer facility provides tools for spectrum analysis.

An LTE Interference Analysis Tool (IAT) is supplied to analyze LTE RF measurements obtained from a scan.  This tool analyzes signal anomalies in a single channel and cell within a single LTE band. LTE technology uses Orthogonal Frequency Division Modulation (OFDM) to allocate RF resources to users.  By enabling one or more of the views provided in LTE IAT, you will see anomalies or interfering signals within Base Station transmissions scanned by the DRT unit. These anomalies appear as spikes in a subframe or slot indicating what could be an interfering signal.

MPS collects information for the different protocols as described below:





Measurements: RSSI, BSIC, C/I
BSIC Scan Rate: 50 Channels / Sec
Overhead Decode: BSIC, Cell ID, Cell Allocation Parameters, RACH Parameters, Cell Selection Parameters, Neighbor Cell Info, AGCH Info


cdma2000 1xEV-DO:

Measurements: PN Offset, Ec/Io, Delay Spread
Pilot Scan Rate: 50 Channels / sec
Overhead Decode: Sync Information, Paging Information, Paging Channel Access Information, Extended Paging Information



Measurements: Scrambling Code, Ec/Io, Delay, Delay Spread
Pilot Scan Rate: 25 Channels / Sec
Overhead Decode: MIB, SIB, 1, 3, 5, 7, 11, 18, 19



Measurements: DwPTS: RSSI, Ec/Io, P-CCPCH: C/I, Ec/Io, TS0 RSSI, Time Offset, Delay Spread, Cell Scrambling Code
Pilot Scan Rate: 200 Channels / Sec



Supported BW: 1.4, 3, 5, 10, 15, 20 MHz
Measurement Rate: 50 Channels / Sec
Overhead Decode Cell Id, BCH, SIB-Type 1



In addition to MPS, DRT’s Tactical SDRs also provide Super General Purpose Receiver (SGPR) service.  SGPR provides search, collection and DF (Direction Finding) capability against Push-to-Talk radios.

The system is configured for SGPR using a PC and signals can then be monitored live or set for automatic signal collection.  Additionally, the DRT4400B series can be configured and controlled via an Android device attached to the system via Bluetooth.

Audio can be saved to WAV files or streamed to a server.  The number of signals that can be simultaneously monitored depends on the system type.

The Android robot is reproduced or modified from work created and shared by Google and used according to terms described in the Creative Commons 3.0 Attribution License.