Modulation Scheme (GSM/EDGE/EDGE Evolution)
Automatic
Modulation Schemespecifies the modulation scheme of the current burst. The Modulation Scheme can be either or .
When is selected, the VSA will demodulate the first matching the TSC Index and Timeslot parameters and auto-detect the modulation scheme of that .
To include modulation in auto-detection, select the Also Auto-detect AQPSK parameter.
For , the manual TSC Index parameter specifies the for subchannel A.
When is selected, the VSA will demodulate the first matching the specified , , and parameters.
The following are Modulation Scheme choices when is selected:
- GMSK Gaussian Minimum Shift Keying
- 8-PSK Phase Shift Keying: A broad classification of modulation techniques where the information to be transmitted is contained in the phase of the carrier wave. (EDGE Enhanced Data for Global Evolution: A technology that gives GSMA and TDMA similar capacity to handle services for the third generation of mobile telephony. EDGE was developed to enable the transmission of large amounts of data at a high speed, 384 kilobits per second. (It increases available time slots and data rates over existing wireless networks.))
- 16-QAM Quadrature Amplitude Modulation
- 32-QAM
- HSR QPSK Quadrature phase shift keying
- HSR 16-QAM
- HSR 32-QAM
- AQPKSK
Not all modulation schemes are applicable for every Burst Type. Modulation schemes that are not applicable to the current will not be able to be selected.
Discard Non-matching Slots
When is selected and Timeslot is set to , all timeslots are searched for a burst which has selected modulation scheme.
Whenthe check box is cleared, the VSA assumes that the being demodulated uses the specified modulation scheme. This will result in large errors when the does not actually use the specified modulation scheme.
only applies when is set to .
See Also
