Version 04.00, July 2021 
2  Rohde & Schwarz R&S
®
CLGD DOCSIS Cable Load Generator 
CONTENTS 
 
Definitions ...................................................................................................................................................................3 
RF characteristics .......................................................................................................................................................4 
Frequency ................................................................................................................................................................................................. 4 
Level ......................................................................................................................................................................................................... 4 
Spectral purity........................................................................................................................................................................................... 5 
Modulation systems ...................................................................................................................................................5 
Downstream (R&S
®
CLGD-K200 option) .................................................................................................................................................. 5 
Enhanced functions for downstream (R&S
®
CLGD-K201 option)............................................................................................................. 8 
Upstream (R&S
®
CLGD-K300 option) ....................................................................................................................................................... 8 
Full duplex DOCSIS generator (R&S
®
CLGD-K400 option) ................................................................................................................... 10 
Operating modes ...................................................................................................................................................... 11 
Downstream signal generation ............................................................................................................................................................... 11 
Upstream signal generation ................................................................................................................................................................... 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 
Interfaces ................................................................................................................................ .................................. 13 
RF outputs .............................................................................................................................................................................................. 13 
Data and transport stream inputs ........................................................................................................................................................... 14 
Control inputs and output ....................................................................................................................................................................... 14 
Enhancements........................................................................................................................................................................................ 14 
General data .............................................................................................................................................................. 14 
Ordering information ................................................................................................................................................ 15 