Agilent Technologies N1911A Bedienungsanleitung PDF herunterladen (Seite 2)

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Introduction

This technical overview is intended

for engineers who are familiar with

the IEEE 802.16 (WiMAX) and wish to

make effective power-time measure-

ments using the P-Series power meter.

This note will include:

• WiMAX overview

• A step-by-step demonstration

guide using ESG and Signal Studio

that simulates mobile WiMAX

(OFDMA) waveform for DL, UL and

both DL & UL in TDD mode, and

perform power-time measurement

and CCDF of this signal with the

P-Series power meter & sensor

using built-in WiMAX predeﬁ ned

measurement setup.

• Related literature

• Ordering information

• Reference

• Power Versus Time (PvT)

• Power Statistical CCDF

The Agilent P-Series power meter

(N1911A single channel and N1912A

dual channel) and wideband power

sensor (N1921A — 50 MHz to

18 GHz and N1922A — 50 MHz to

40 GHz) provide fast and accurate

power measurements up to 30 MHz

video bandwidth. Measurements

include peak, peak-to-average-ratio,

average power, rise time, fall time,

maximum power, minimum power and

statistical data of wideband signals.

Its wide video

bandwidth (30 MHz) coupled with

its 100 mega samples per second

continuous sampling rate, fulﬁ lled

the requirement to capture high burst

rates and fast time varying power

levels, which are characteristics of

Use the WiMAX predeﬁ ned preset value of P-Series power meter to evaluate your

designs quickly and thoroughly

WiMAX signal with the bandwidth

1.25 MHz – 28 MHz (deﬁ ned by IEEE

802.16).

The P-Series power meter’s 802.16

WiMAX predeﬁ ned measurement

setups simplify engineer’s task on

making fast and accurate measure-

ment, making it an excellent choice for

measuring average power, total power

burst power (power versus time) and

CCDF (Complementary Cumulative

Distribution Function) in curve and

tabular format.

Thermal sensors provide true RMS

power reading. Peak detector

under reads peak-average will result

when OFDMA/modulation is applied.

In fact, thermocouple sensors do not

offer wide enough bandwidth to track

the fast time power level transitions

of WiMAX. Therefore, diode sensors

are wide enough bandwidth to track

the fast time power level transitions

of the ideal choice for acquiring fast

signals and offer higher dynamic

range (better sensitivity) than thermal

sensors, thus enabling reliable peak

as well as average measurement. The

Agilent N1921A/N1922A power sen-

sors are designed with diode sensors.

N1911A/N1912A IEEE 802.16 WiMAX Measurement Application

P-Series power meter with WiMAX predeﬁ ned

preset value measurement

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