Difference between revisions of "SBX"

Revision as of 12:38, 22 June 2016

Device Overview

The SBX is a wide bandwidth transceiver that provides up to 100 mW of output power, and a typical noise figure of 5 dB. The local oscillators for the receive and transmit chains operate independently, which allows dual-band operation. The SBX is MIMO capable, and provides 40 MHz or 120 MHz of bandwidth. The SBX is ideal for applications requiring access to a variety of bands in the 400 MHz-4400 MHz range. Example application areas include WiFi, WiMax, S-band transceivers and 2.4 GHz ISM band transceivers.

The SBX is capable of phase coherent operation, and therefore is suitable for MIMO and Phased Array applications.

Key Features

Frequency Range: 400MHz - 4.4GHz Versions: 40MHz / 120MHz Power Output: 100mW

Daughterboard Specifications

Features

• 2 quadrature frontends (1 transmit, 1 receive)
  • Defaults to direct conversion
  • Can be used in low IF mode through lo_offset with uhd::tune_request_t
• Independent receive and transmit LO's and synthesizers
  • Allows for full-duplex operation on different transmit and receive frequencies
  • Can be set to use Integer-N tuning for better spur performance with uhd::tune_request_t

Antennas

Transmit: TX/RX

Receive: TX/RX or RX2

• Frontend 0: Complex baseband signal for selected antenna
• Note: The user may set the receive antenna to be TX/RX or RX2. However, when using an SBX board in full-duplex mode, the receive antenna will always be set to RX2, regardless of the settings.

Gains

• Transmit Gains: PGA0, Range: 0-31.5dB
• Receive Gains: PGA0, Range: 0-31.5dB

Bandwidths

• SBX: 40 MHz, RX & TX
• SBX-120: 120 MHz, RX & TX

Sensors

• lo_locked: boolean for LO lock state

LEDs

• All LEDs flash when daughterboard control is initialized
• TX LD: Transmit Synthesizer Lock Detect
• TX/RX: Receiver on TX/RX antenna port (No TX)
• RX LD: Receive Synthesizer Lock Detect
• RX1/RX2: Receiver on RX2 antenna port

RF Specifications

Freq Range

• 400MHz - 4.4GHz

Noise Figure

• 4 - 5 dB @ (400MHz ~ 1.5GHz)
• 5 - 7 dB @ (1.5GHz ~ 3GHz)
• 7 - 12dB @ (3GHz ~ 4.4GHz)

RX IIP3 (Max)

• 16 ~ 22 dBm

RX IQ Imbalance

• -20 dBc @ (400MHz ~ 600MHz)
• -30dBc @ (600MHz ~ 4.4GHz)

TX Power (Max)

• 20 dBm @ (400MHz ~ 3.5GHz)
• 18 - 20dBm @ (3.5GHz ~ 4.4GHz)

TX OIP3

• 26 - 30dBm @ (400MHz ~ 1.5GHz)
• 30 dBm @ (1.5GHz ~ 4.4GHz)

TX IQ Imbalance

• -20 dBc @ (400MHz ~ 600MHz)
• -30dBc @ (600MHz ~ 4.4GHz)

Hardware Specifications

• Ettus Research recommends to always use the latest stable version of UHD

SBX

• Current Hardware Revision: 5.1
• Minimum version of UHD required: 3.8.0

Environmental Specifications

Operating Temperature Range

• 0-40 °C

Operating Humidity Range

• 10% to 90% non-condensing

USRP Compatibility

SBX-40

• N or X Series

SBX-120

• X Series only

Schematics

SBX

SBX Schematics

Key Component Datasheets

RF Connectors

• The SBX daughterboard features female SMA connectors for both the TX/RX and RX2 connectors.

Certifications

RoHS

As of December 1st, 2010 all Ettus Research products are RoHS compliant unless otherwise noted. More information can be found at http://ettus.com/legal/rohs-information

Certificate of Volatility

SBX-40/SBX-120

• Media:volatility UBX CBX WBX SBX r1 1.pdf

RF Performance Data

• SBX without UHD Corrections

Downloads

FPGA Resources

UHD Stable Binaries

UHD Source Code on Github