Spectral and power measurements to 70 GHz on IEEE802.11ad traffic

April 06, 2016 // By Graham Prophet
Tektronix claims the most accurate solution for characterising and debugging IEEE 802.11ad transmitter PHY performance, for silicon and system designs trying to achieve multi-gigabit wireless connectivity.

The new test package, based on the 70 GHz DPO70000SX Series ATI Oscilloscope and SignalVu Option SV30, delivers best residual error vector magnitude (EVM) measurements along with easy setup for complete characterisation and robust debugging capabilities.


IEEE 802.11ad or WiGig is aimed at providing data throughput speeds of up to 7 Gb/sec. To achieve these speeds over short distances, the 802.11ad PHY layer uses frequencies in the unlicensed 60 GHz spectrum band. The high frequencies involved – up to 65.80 GHz in some markets – have presented a number of test and measurement challenges, including the need for multiple instruments that must be calibrated together and difficult cross-domain debugging due to the frequencies involved. Tek says it has addressed these issues with a single-box solution that spans the entire 60-65GHz spectrum, which simplifies test setup and debug.


Using the DPO70000SX oscilloscope's low-noise ATI acquisition technology, characterisation can be performed with 20% greater accuracy than alternative offerings with an EVM that is specified at 2.5% (-32.0 dB). Competitive offerings, Tek claims, also require down-conversion and the need for two instruments to be calibrated, decreasing accuracy and increasing set-up time.


The Tektronix 802.11ad solution speeds up debugging by providing cross correlation between RF and time domains, yielding deeper insight into potential problems. The Tektronix solution also supports live triggering on signals up to 70 GHz. This 802.11ad transmitter test solution also includes capability to de-embed cables, attenuators or amplifiers in front of the scope with SDLA64.


SV30 option for 802.11ad testing is available for download from tek.com and is priced at $9,000.


Tektronix; www.tek.com