• VRM-SDR Block Diagram

The VRM-AMC-SDR is a flexible software defined radio (SDR) platform for developing, prototyping and testing 5G massive multiple input, multiple output (MIMO and M-MIMO) base station transceiver (BTS) systems and proprietary or standard implementations of UMTS, LTE / LTE-Advanced systems, as well as a variety of applications ranging from cognitive radios to resilient security networks. We have collaborated with Fraunhofer Heinrich Hertz Institute (HHI) to integrate IDT’s IQ compression technology, enabling mobile operators to realize up to three times the effective bandwidth on the optical link in a BTS. The VRM-SDR can easily scale up to dozens of antennas on the access link, providing higher data rates by advanced beamforming techniques. The VRM-AMC-SDR can also connect to the VRM-NAMC-ODSP for baseband processing and can be integrated with other V Rose products to provide a complete BTS infrastructure solution in-a-box.

  • Flexible software defined radio platform
  • Stacked digital interface card and radio frequency front-end
  • 2, 4, 6 or 8 transceivers
  • CPRI compression technology enables up to 3x effective bandwidth
  • 4 x 10 Gbps optical baseband interface with QSFP connector
  • 2 x 1Gb Ethernet interface
  • AMC form factor
  • 4 x 10 Gbps optical lanes for CPRI and 10 GbE to the front panel via QSFP (accepts QSFP or SFP+ modules)
  • 1x SD card slot available, memory extension up to 64 Gbyte, bootable

Received Signal Strength (RSSI)

Power Levels

Maximum TX Output Power (1MHz tone into 50 Ω load)

8 dBm @800MHz
7.5 dBm @2.4MHz
6.5 dBm @5.5MHz

RF Inputs (Peak Power),
Absolute Maximum rating:

2.5 dBm


100 dB


±2 dB

RX Gain




74.5 dB @ 800 MHz
73.0 dB @ 2.3GHz
65.5 dB @ 5.5GHz


RX1 to RX2, RX3 to RX4, RX5 to RX6, RX7 to RX8

70db @ 800MHz
65db @ 2.4GHz
52db @ 5.5GHz

TX1 to TX2, TX3 to TX4, TX5 to TX6, TX7 to TX8

50db @ 800MHz
50db @ 2.4MHz
50db @ 5.5MHz

Frequency Stability

TRx8Mod in standalone mode uses onboard reference oscillator (Connor-Winfield T602-30.72M, temperature compensated crystal oscillator) frequency stability: +/- 0.28ppm @ 30.72MHz (i.e. +/- 672Hz @ 2.4GHz

TRx8Mod in RRH mode (TRx8Mod connected to a baseband module or eNB over CPRI): frequency stability depends on baseband module/eNBs built in reference oscillators (reference clock will be recovered from CPRI connection)

Regulatory Compliance

2006/95/EC, Low Voltage Directive (LVD)
0201/108/EC, Electromagnetic Compatibility (EMC) Directive
EN 55022:2010, EN 55024:2010
Class A product
IEC 60950-1:2005
EN 60950-1:2006

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