BTC Z22 Manual do Utilizador descarregar pdf (Página 30)

Version 02.00, November 2014

30 Rohde & Schwarz R&S

BTC Broadcast Test Center

Coding modulation

mode

CCM, ACM, VCM

ACM control

via remote control, SCPI scripts,

seamless switching of parameters

(modulation coding, FEC frame, pilot),

PL frame by PL frame

variable coding modulation

number of input streams

1 to 8 input streams,

1 to 2 external inputs supported,

3 to 8 test TS packets

multiple input streams (MIS)

input stream settings

for each input stream: individual setting of

ISI, modulation coding, FEC frame, pilot

merger

BB frame padding, if number of input

streams > 1

Annex M

mode

off/on

number of time slices

1 to 8 time slices,

time slice 1: real DVB-S2 FEC,

time slices 2 to 8: PRBS data symbols

time slice settings

for each time slice: individual setting of

TSN, modulation coding, FEC frame, pilot

Special function

PL scrambling sequence ID

0x00000 to 0x3FFFD

Test signals

TS test packet (see “Internal test signals”)

DVB-S2-X (R&S

BTC-K510 option)

The DVB-S2-X option (Part II of the DVB-S2 standard) extends and requires the DVB-S2 option (Part I of the DVB-S2 standard).

The two options together provide all the DVB-S2 Part I and Part II functions indicated under the options.

DVB-S2-X

in line with EN 302307 part II

(DVB-S2 extensions)

supported services

broadcast services, professional services,

interactive services, DSNG, VL-SNR

Modulation

constellation

S2-X MODCOD (normal)

QPSK, 8PSK, 8APSK-L, 16APSK,

16APSK-L, 32APSK, 32APSK-L, 64APSK,

64APSK-L, 128APSK, 256APSK,

256APSK-L

S2-X MODCOD (short)

QPSK, 8PSK, 16APSK, 32APSK

S2-X VL-SNR (set1)

QPSK, π/2 BPSK

S2-X VL-SNR (set2)

π/2 BPSK

symbol rate (all constellations)

0.1 Msps to 80 Msps

S2-X VL-SNR (set1) QPSK: max. 43 Msps

pulse filtering

root raised cosine rolloff

(α = 0.05, 0.10, 0.15, 0.20, 0.25, 0.35)

MER

> 40 dB (QPSK/8PSK, 20 Msps)

modulation frequency response

±0.25 dB

shoulder attenuation

> 50 dB

In preparation.

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