Keysight x-series Programmer's Reference

3 VMA Mode
3.1 Digital Demod Measurement
Parameter APCO-25
C4FM/CQPSK Combined
APCO-25
HCPM
APCO-25
HDQPSK
APCO-25
CQPSK EVM
Ref Filter Raised Cosine 4RC Rectangular Raised Cosine
Filter Alpha 0.2 0.75 0.2
Points / Symbol 5 5 5 5
Meas Interval 200 symbols 168 symbols 180 symbols 200 symbols
Search Length ~63.3 ms ~63.3 ms
Burst Search Off On On Off
Sync Search Off Off Off Off
Parameter APCO-25
HDQPSK EVM
Tetra DMR DPMR
Modulation Format pi/4 DQPSK pi/4 DQPSK 4-FSK 4-FSK
Info BW 25 kHz 40 kHz 40 kHz 40 kHz
Symbol Rate 6 kHz 18 kHz 4.8 kHz 2.4 kHz
Meas Filter None Root Raised Cosine Root Raised Cosine Root Raised Cosine
Ref Filter APCO-25 Phase 2 RC Raised Cosine Raised Cosine Raised Cosine
Filter Alpha 0.35 0.2 0.2
Points / Symbol 5 4 5 5
Meas Interval 180 symbols 231 symbols 132 symbols 200 symbols
Search Length ~63.3 ms ~72.2 ms ~100 ms
Burst Search On On On Off
Sync Search Off Off Off Off
Preset To Standard – Others
Parameter None DECT VDL Model 2/3 MIL-STD CPM
(188-181C Opt21)
Modulation Format QPSK 2-FSK D8PSK CPM (FM)
Info BW 5 MHz 5 MHz 25 kHz 25 kHz
Symbol Rate 1 MHz 1.152 MHz 10.5 kHz 4.8 kHz
Meas Filter Root Raised Cosine None None None
Ref Filter Raised Cosine Gaussian Raised Cosine 1REC (CPM)
Alpha / BT 0.5 0.5 0.6
Points / Symbol 10 4 5 5
Meas Interval 501 symbols 480 symbols 315 symbols 500 symbols
Search Length ~9.72 ms ~120 ms
Burst Search Off On On Off
Sync Search Off Off Off Off
321 Vector Modulation Analyzer Mode User's &Programmer's Reference

Keysight x-series Specifications

General

Analysis Bandwidth	Up to 1 GHz (depending on model)
Real-Time Bandwidth	Up to 1 GHz (depending on model)
Form Factor	Benchtop
Connectivity	LAN, USB, GPIB
Resolution Bandwidth	1 Hz to 10 MHz (depending on model)