BTC Z22 Manual do Utilizador descarregar pdf (Página 23)

Version 02.00, November 2014

Rohde & Schwarz R&S

BTC Broadcast Test Center 23

Digital modulation systems

At least one I/Q baseband generator (R&S

BTC-B1 option) must be installed. If two I/Q baseband generators are installed

(R&S

BTC-B1 option and R&S

BTC-B2 option) and two signals of the same standard (e.g. DVB-T/DVB-H) are to be output

simultaneously, two corresponding software options must also be installed (in this case R&S

BTC-K501). If only one R&S

BTC-K501

is installed and DVB-T/DVB-H is selected in one I/Q baseband generator, the other I/Q baseband generator is disabled for

DVB-T/DVB-H. However, a software option is not tied to a specific I/Q baseband generator.

The specified data applies together with the parameters of the respective standard. The entire frequency range, the filter parameters

and symbol rates can be set by the user.

Terrestrial standards

DVB-T2 (R&S

BTC-K516 option)

DVB-T2

in line with EN 302755 and TS 102773

v1.1.1, v1.2.1

and v1.3.1

, incl. Annex I

single PLP and multi PLP

v1.1.1, v1.2.1

T2-Base single profile transmission

v1.3.1

T2-Lite single profile transmission

v1.3.1

in line with Annex I

Input

transport stream

interface

ASI

format

T2-MI (single PLP and multi PLP) or

MPEG-2 TS (single PLP only)

T2-MI

interface

on/off

PID filter

settable

SID filter

settable

analyzer

T2 specification check and logging

Modulation

modulation

COFDM

PLP number

1 (single PLP) to 20 (multi PLP)

single PLP

T2-MI interface

off

PLP number

single PLP and multi PLP

T2-MI interface

PLP number

1 to 20

Coding

bandwidth

1.7/5/6/7/8 MHz

MER

> 40 dB

modulation frequency response

< ±0.2 dB

shoulder attenuation

> 45 dB

PLP type

common, data type 1, data type 2

baseband mode

normal (NM), high efficiency (HEM)

ISSY

off, short, long

null packet deletion

on/off

FEC frame

normal (64k), short (16k)

code rate

1/2, 3/5, 2/3, 3/4, 4/5, 5/6, 1/3

11, 12

2/5

11, 12

constellation

QPSK, 16QAM, 64QAM, 256QAM

rotation

on/off

time interleaver

settable

frame interval (I

jump

)

≥ 1

FFT size

1k, 2k, 4k, 8k, 16k and 32k COFDM

extended carrier mode

on/off

pilot pattern

PP1, PP2, PP3, PP4, PP5, PP6, PP7,

PP8

guard interval

1/4, 19/128, 1/8, 19/256, 1/16, 1/32, 1/128

Bias balancing cells and unoccupied cell filling between PLP cells not supported.

Features in line with T2 v1.3.1, including Annex I (T2-Lite).

With T2-MI interface switched on.

With internal test signals.

With T2-MI interface switched off.

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