Version 03.00, January 2017

2 Rohde & Schwarz R&S

CLGD DOCSIS Cable Load Generator

CONTENTS

Definitions ....................................................................................................................................................................... 4

RF characteristics ........................................................................................................................................................... 5

Frequency ......................................................................................................................................................................................... 5

Level.................................................................................................................................................................................................. 5

Downstream outputs, low and high ................................................................................................................................................. 5

Upstream output ............................................................................................................................................................................ 5

CSO/CTB output ............................................................................................................................................................................ 5

Spectral purity ................................................................................................................................................................................... 6

Modulation systems ........................................................................................................................................................ 6

Downstream (R&S

CLGD-K200 option) ............................................................................................................................................ 6

DOCSIS 3.1 ................................................................................................................................................................................... 6

Digital TV standards and DOCSIS 3.0 ............................................................................................................................................ 7

Analog TV standards ...................................................................................................................................................................... 7

Arbitrary waveform generator ......................................................................................................................................................... 8

Transport stream generator ................................................................................................................................ ............................ 8

Upstream (R&S

CLGD-K300 option) ................................................................................................................................................. 9

DOCSIS 3.1 ................................................................................................................................................................................... 9

DOCSIS 3.0 A-TDMA ................................ ................................................................................................ ..................................... 9

DOCSIS 3.0 S-CDMA .................................................................................................................................................................. 10

Arbitrary waveform generator ....................................................................................................................................................... 10

Operating modes........................................................................................................................................................... 11

Downstream signal generation ........................................................................................................................................................ 11

DOCSIS 3.1 mode ....................................................................................................................................................................... 11

Mixed mode ................................................................................................................................................................................. 11

Upstream signal generation ............................................................................................................................................................. 11

Cable modem emulation mode ..................................................................................................................................................... 11

Upstream burst timing control ....................................................................................................................................................... 11

Signal interference simulation ..................................................................................................................................... 12

Tilt ................................................................................................................................................................................................... 12

AWGN (R&S

CLGD-K1050 option) ................................................................................................................................................. 12

Microreflections (R&S

CLGD-K1050 option) .................................................................................................................................... 12

AC hum (R&S

CLGD-K1050 option) ................................................................................................................................ ............... 12

Narrowband interference signal and impulsive noise (R&S

CLGD-K1050 option) ........................................................................... 12

Phase noise (R&S

CLGD-K1050 option) ......................................................................................................................................... 13