Modulation Analysis (Demod Mode)
3- 46
WCA230A & WCA280A User Manual
Restrictions of Use.
H
When the modulation type is P25 C4FM, the analysis is performed only for
the span of 20 kHz and 50 kHz. For the 50 kHz span, Acquisition Length in
the Timing menu must be set to greater than 25.6 ms.
H
When the modulation type is OQPSK, set the span so that the sampling rate
is more than three times as fast as the symbol rate. The sampling rate varies
according to span setting. For the detail, refer to Table A--9 in
Appendix A
.
Modulation Parameters...
Sets the following modulation parameters:
Symbol Rate.
Enters the symbol rate for demodulating digitally-modulated
signals. Symbol rate and bit rate are related as follows:
(Symbol rate) = (Bit rate)/(Number of bits per symbol)
For example, the number of bits per symbol is 3 for 8PSK.
Measurement Filter...
Selects a filter for demodulating a digitally-modulated
signal:
H
None (no filter)
H
Root Raised Cosine
Reference Filter...
Selects a filter for creating a reference signal:
H
None (no filter)
H
Raised Cosine
H
Gaussian
H
Half Sine
Refer to
Process Flow for Digitally-Modulated Signals
on page 3--48 for the
measurement and reference filters.
Filter Parameter.
Enters an
α
/BT value for the Measurement Filter and
Reference Filter. Range: 0.0001 to 1
Auto Modulation Depth.
Valid when the modulation type (refer to page 3--45)
is ASK. Determines whether to automatically detect or manually set the
modulation depth used to distinguish between the two states of an ASK signal.
H
On.
Default
. Automatically calculates the modulation depth for the analysis
range and displays the value in the Modulation Depth side key.
H
Off.
Sets the modulation depth using the Modulation Depth side key.
Summary of Contents for WCA200A
Page 6: ......
Page 8: ......
Page 29: ...Getting Started...
Page 30: ......
Page 57: ...Operating Basics...
Page 58: ......
Page 86: ...Functional Overview 2 28 WCA230A WCA280A User Manual...
Page 125: ...Reference...
Page 126: ......
Page 208: ...Modulation Analysis Demod Mode 3 82 WCA230A WCA280A User Manual...
Page 272: ...Setting Timing Parameters 3 146 WCA230A WCA280A User Manual...
Page 346: ...Display Line 3 220 WCA230A WCA280A User Manual...
Page 358: ...Marker Operation and Peak Search 3 232 WCA230A WCA280A User Manual...
Page 388: ...File Format 3 262 WCA230A WCA280A User Manual...
Page 392: ...Screen Copy 3 266 WCA230A WCA280A User Manual...
Page 393: ...Appendices...
Page 394: ......
Page 430: ...Appendix C Digital Demodulation Symbol Mapping C 4 WCA230A WCA280A User Manual...
Page 437: ...Glossary...
Page 438: ......
Page 446: ...Glossary Glossary 8 WCA230A WCA280A User Manual...
Page 447: ...Index...
Page 448: ......