Keysight Pathwave 89600 VSA .NET API
QamLevels Property
See Also 
Agilent.SA.Vsa.CustomOfdm.Interfaces Assembly > Agilent.SA.Vsa.CustomOfdm Namespace > MeasurementExtension Class : QamLevels Property


Glossary Item Box

Gets or sets the array of possible QAM constellation types.

Syntax

Visual Basic (Declaration) 
Public MustOverride Property QamLevels As Integer()
C# 
public abstract int[] QamLevels {get; set;}
C++/CLI 
public:
abstract property array<int>^ QamLevels {
   array<int>^ get();
   void set (    array<int>^ value);
}

Property Value

The default value is "0, 1, 2, 4, 6, 8".

Remarks

This is an array of values that indicate QAM constellation types. Values in the QamIdentifiers array are indices into this QamLevels array. Valid values in this array are: 0 = Unknown, 1 = BPSK, 2 = QPSK, 3 = 8-PSK, 4 = 16-QAM, 5 = 32-QAM, 6 = 64-QAM, 7 = 128-QAM, 8 = 256-QAM, 9 = 512-QAM, 10 = 1024-QAM, 11 = 2048-QAM, 12 = 4096-QAM, 13 = 8192-QAM, 14 = 16384-QAM, 15 = 32768-QAM, 16 = 65536-QAM.

The value 0 means that the analyzer will attempt to auto-detect the actual modulation format by looking at statistics of the measured IQ values of the subcarriers that have been assigned this QAM level. Auto-detection is able to detect modulation formats that can't be directly specified in QamLevels, including BPSK-Q, BPSK+45, BPSK-45, QPSK+45, 4-PAM, 4-PAM-Q, 8-QAM, and 8-QAM+45. However, auto-detection is not able to detect 512-QAM, 1024-QAM, 2048-QAM, 4096-QAM, or above.

Requirements

Target Platforms: Windows 11 Professional or Enterprise; Windows 10 Professional, Enterprise, or Education (64-bit)

See Also