BTC Z22 Manual do Utilizador descarregar pdf (Página 38)

Version 02.00, November 2014

38 Rohde & Schwarz R&S

BTC Broadcast Test Center

Interferer management

The interferer management functionality is included in the R&S

BTC-K35 arbitrary waveform generator option.

Interferer

signal sources

arbitrary waveform generator

up to eight interference signals

digital I/Q IN

external I/Q signal

level offset range

–70 dB to +70 dB

(relative to useful signal level)

frequency offset range

–80 MHz to +80 MHz

(relative to center frequency)

Signal set

activated options, waveforms and

interferers, user-specific waveforms

Distortion simulation and nonlinearity (R&S

BTC-K1200)

TX distortion simulation

Transmission distortion simulation can be generated either on path A or B with one R&S

BTC-K1200 option. For transmission

distortion simulation to be generated on paths A and B simultaneously, two R&S

BTC-K1200 must be installed.

TX distortion simulation

Nonlinear distortion

limiter

limiter position

0 % to 100 %, settable

nonlinearity

gain

–50 % to +50 % deviation, settable

phase

–10° to +10° deviation, settable

number of nodes

settable

curve interpolation

cubic spline

entry

graphic or table

curves

can be loaded

file format

xml

Linear distortion

filter function

complex FIR

number of taps

128, real and imaginary

coefficient bit width

number of nodes

settable

filter design

internal

filter design method

windowed FIR

gain

0 dB to 80 dB

group delay

–100 ns to +100 ns

entry

by gain and group delay curve table

High interferer power diminishes useful signal values.

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