WiGig IEEE802.11ad transmitter testing

Playback of recorded files

With SV56, playback of recorded files from one of the USB spectrum

analyzers is possible. Playback of recorded signals can reduce hours of

watching and waiting for a spectral violation to minutes at your desk

reviewing recorded data. Recording length is limited only by storage media

size and recording is a basic feature included in SignalVu-PC. SignalVu-PC

SV56 Playback allows for complete analysis by all SignalVu-PC

measurements, including DPX Spectrogram. Minimum signal duration

specifications are maintained during playback. AM/FM audio demodulation

can be performed. Variable span, resolution bandwidth, analysis length,

and bandwidth are all available. Frequency mask testing can be performed

on recorded signals up to 40 MHz in span, with actions on mask violation

including beep, stop, save trace, save picture, and save data. Portions of

the playback can be selected and looped for repeat examination of signals

of interest. Playback can be skip-free, or time gaps can be inserted to

reduce review time. A Live Rate playback ensures fidelity of AM/FM

demodulation and provides a 1:1 playback vs. actual time. Clock time of the

recording is displayed in the spectrogram markers for correlation to real

world events. In the illustration below, the FM band is being replayed, with

a mask applied to detect spectral violations, simultaneous with listening to

the FM signal at the center frequency of 92.3 MHz.

Signal survey

The signal classification application (SV54) enables expert systems

guidance to aid the user in classifying signals. It provides graphical tools

that allow you to quickly create a spectral region of interest, enabling you to

classify and sort signals efficiently. The spectral profile mask, when overlaid

on top of a trace, provides signal shape guidance, while frequency,

bandwidth, channel number, and location are displayed allowing for quick

checks. WLAN, GSM, W-CDMA, CDMA, Bluetooth standard and enhanced

data rate, LTE FDD and TDD, and ATSC signals can be quickly and simply

classified. Databases can be imported from your H500/RSA2500 signal

database library for easy transition to the new software base.

Above is a typical signal survey. This survey is of a portion of the TV broadcast band,

and 7 regions have been declared as either Permitted, Unknown, or Unauthorized, as

indicated by the color bars for each region.

In this illustration, a single region has been selected. Since we have declared this to be

an ATSC video signal, the spectrum mask for the ATSC signal is shown overlaid in the

region. he signal is a close match to the spectrum mask, including the vestigial carrier at

the lower side of the signal, characteristic of ATSC broadcasts.

SignalVu-PC with mapping can be used to manually indicate the azimuth of

a measurement made in the field, greatly aiding in triangulation efforts. The

addition of a smart antenna able to report its direction to SignalVu-PC

automates this process. Automatically plotting the azimuth/bearing of a

measurement during interference hunting can greatly speed the time spent

searching for the source of interference. Tektronix offers the Alaris DF-

A0047 handheld direction finding antenna with frequency coverage from

20 MHz -8.5 GHz (optional 9 kHz-20 MHz) as part of a complete

interference hunting solution. Azimuth information and the selected

measurement is automatically recorded on the SignalVu-PC Map just by

releasing the control button on the antenna. Full specifications for the DF-

A0047 antenna are available in a separate antenna datasheet available on

www.Tektronix.com.

Datasheet

www.tek.com 7