Keysight x-series - Page 311

3 VMA Mode
3.1 Digital Demod Measurement
Preset To Standard – Video
Parameter ATSC 8-VSB ATSC 16-VSB DVB-C 16-QAM DVB-C 32-QAM
Segments Segment1 Segment1 Segment1 Segment1
Modulation Format 8-VSB 16-VSB 16-QAM 32-QAM
Info BW 7 MHz 7 MHz 8 MHz 8 MHz
Symbol Rate 10.762 MHz 10.762 MHz 6.9 MHz 6.9 MHz
Meas Filter Root Raised Cosine Root Raised Cosine Root Raised Cosine Root Raised Cosine
Ref Filter Raised Cosine Raised Cosine Raised Cosine Raised Cosine
Filter Alpha 0.1152 0.1152 0.15 0.15
Points / Symbol 2 2 2 2
Meas Interval 800 symbols 800 symbols 800 symbols 800 symbols
Search Length
Burst Search Off Off Off Off
Sync Search Off Off Off Off
I/Q Offset Compensation Off Off
Parameter DVB-C 64-QAM DVB-C 128-QAM DVB-C 256-QAM
Segments Segment1 Segment1 Segment1
Modulation Format 64-QAM 128-QAM 256-QAM
Info BW 8 MHz 8 MHz 8 MHz
Symbol Rate 6.9 MHz 6.9 MHz 6.9 MHz
Meas Filter Root Raised Cosine Root Raised Cosine Root Raised Cosine
Ref Filter Raised Cosine Raised Cosine Raised Cosine
Filter Alpha 0.15 0.15 0.15
Points / Symbol 2 2 2
Meas Interval 800 symbols 800 symbols 800 symbols
Search Length
Burst Search Off Off Off
Sync Search Off Off Off
I/Q Offset Compensation Off Off Off
APSK R2/R1 NA NA NA
APSK R3/R1 NA NA NA
Parameter DVB-S2 QPSK DVB-S2 8PSK DVB-S2 16-APSK
Code Rate 2/3
Segments Segment1 Segment2 Segment1 Segment2 Segment1 Segment2
Modulation
Format
QPSK
(Custom IQ)
QPSK
(Custom IQ)
QPSK
(Custom IQ)
8PSK
(Custom IQ)
QPSK
(Custom IQ)
16-APSK
311 Vector Modulation Analyzer Mode User's &Programmer's Reference