BTC Z22 Manual de usuario descargar pdf (Pagina 31)

Version 02.00, November 2014

Rohde & Schwarz R&S

®

BTC Broadcast Test Center 31

Coding

constellation

code rate

(Implementation MODCOD name)

S2-X – QPSK (normal)

13/45, 9/20, 11/20

S2-X – 8PSK (normal)

23/36, 25/36, 13/18

S2-X – 8APSK (normal)

100/180, 104/180

S2-X – 16APSK (normal)

90/180, 96/180, 100/180, 26/45, 3/5,

18/30, 28/45, 23/36, 20/30, 25/36, 13/18,

140/180, 154/180

S2-X – 32APSK (normal)

2/3, 128/180, 132/180, 140/180

S2-X – 64APSK (normal)

128/180, 132/180, 7/9, 4/5, 5/6

S2-X – 128ASK (normal)

135/180, 140/180,

S2-X – 256APSK (normal)

116/180, 20/30, 124/180, 128/180, 22/30,

135/180

S2-X – QPSK (short)

11/45, 4/15, 14/45, 7/15, 8/15, 32/45

S2-X – 8PSK (short)

7/15, 8/15, 26/45, 32/45

S2-X – 16ASK (short)

7/15, 8/15, 26/45, 3/5, 32/45

S2-X – 32ASK (short)

2/3, 32/45

S2-X VL-SNR – QPSK (normal)

2/9

S2-X VL-SNR – BPSK (medium)

1/5, 11/45, 1/3

S2-X VL-SNR – BPSK (short)

1/5, 11/45, 4/15, 1/3

S2-X FEC frame

predefined: normal, 64800 bit, short,

16200 bit, medium, 32400 bit

pilot insertion

on/off

DIRECTV legacy modulation (R&S

®

BTC-K509 option)

DIRECTV legacy modulation

in line with DIRECTV transmission

specifications

Modulation

constellation

QPSK

symbol rate

20 Msps

overrange

1 Msps to 30 Msps

pulse shaping filter

root raised cosine rolloff, α = 0.20,

variable rolloff (0.15, 0.20, 0.25, 0.35)

MER

38 dB (20 Msps)

modulation frequency response

< ±0.25 dB

shoulder attenuation

50 dB

Coding

code rate

1/2, 2/3, 6/7

Phase noise

dynamic DIRECTV phase noise

in combination with R&S

®

BTC-K1043

Special function

user-specific DIRECTV streams

can be replayed in 188 byte format,

requires R&S

®

BTC-K20 option

error insertion

after convolutional encoder

Test signals

TS test packet (see “Internal test signals”)

1 2 ... 26 27 28 29 30 31 32 33 34 35 36 ... 63 64

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