Description

Provides access to the properties and methods defining an Transmitter object.

Object Model

Public Methods

IsRefractionTypeSupported	Gets a value indicating whether the specified type can be used
SetModel	Sets the current transmitter model by name.

Public Properties

Graphics	Get the 2D Graphics properties for the transmitter.
Model	Gets the current transmitter model.
Refraction	Refraction method, a member of the AgESnRefractionType enumeration.
RefractionModel	Gets a refraction model
RefractionSupportedTypes	Returns an array of valid choices
SupportedModels	Gets an array of supported model names.
UseRefractionInAccess	Flag controls whether refraction is applied when computing relative position in Access
VO	Get the 3D Graphics properties for the transmitter.

Example

Compute a link budget for a Transmtiter and Receiver pair, using simple models

[C#] Copy Code

IAgStkObject xmtrAsStkObject = geoTransmitter as IAgStkObject; 

IAgStkObject rcvrAsStkObject = facilityReceiver as IAgStkObject; 

 

//Set the transmitter to the simple model 

geoTransmitter.SetModel("Simple Transmitter Model"); 

IAgTransmitterModelSimple simpleTrans = geoTransmitter.Model as IAgTransmitterModelSimple; 

 

//Set the simple transmitter model's frequency to 3.2 GHz 

simpleTrans.Frequency = 3.2; 

 

//Set the simple transmitter model's EIRP to 60 dBW 

simpleTrans.Eirp = 60.0; 

 

//Set the receiver to the simple model 

facilityReceiver.SetModel("Simple Receiver Model"); 

IAgReceiverModelSimple simpleRcvr = facilityReceiver.Model as IAgReceiverModelSimple; 

 

//Set the simple receiver model's G/T to 60 dB/K 

simpleRcvr.GOverT = 60.0; 

 

//Create an access object for the access between the transmitter and recevier objects 

IAgStkAccess linkAccess = xmtrAsStkObject.GetAccessToObject(rcvrAsStkObject); 

 

//Compute access 

linkAccess.ComputeAccess(); 

 

// Get the access intervals 

IAgIntervalCollection accessIntervals = linkAccess.ComputedAccessIntervalTimes; 

 

// Extract the access intervals and the range information for each access interval 

Array dataPrvElements = new object[] { "Time", "Eb/No", "BER" }; 

 

IAgDataPrvTimeVar dp = linkAccess.DataProviders["Link Information"] as IAgDataPrvTimeVar; 

 

for (int index0 = 0; index0 < accessIntervals.Count; ++index0) 

{ 

    object startTime = null, stopTime = null; 

    accessIntervals.GetInterval(index0, out startTime, out stopTime); 

 

    IAgDrResult result = dp.ExecElements(startTime, stopTime, 60, ref dataPrvElements); 

 

    Array timeValues = result.DataSets[0].GetValues(); 

    Array ebno = result.DataSets[1].GetValues(); 

    Array ber = result.DataSets[2].GetValues(); 

 

    for (int index1 = 0; index1 < timeValues.GetLength(0); ++index1) 

    { 

        string time = (string)timeValues.GetValue(index1); 

        double ebnoVal = (double)ebno.GetValue(index1); 

        double berVal = (double)ber.GetValue(index1); 

        Console.WriteLine("{0}: Eb/No={1} BER={2}", time, ebnoVal, berVal); 

    } 

 

    Console.WriteLine(); 

}

Compute a link budget for a Transmtiter and Receiver pair, using complex models

[C#] Copy Code

IAgStkObject xmtrAsStkObject = geoTransmitter as IAgStkObject; 

IAgStkObject rcvrAsStkObject = facilityReceiver as IAgStkObject; 

 

//Enable the rain loss computation on the scenario RF environment 

scenarioRFEnv.PropagationChannel.EnableRainLoss = true; 

 

//Set the transmitter to the complex model 

geoTransmitter.SetModel("Complex Transmitter Model"); 

IAgTransmitterModelComplex complexTrans = geoTransmitter.Model as IAgTransmitterModelComplex; 

 

//Set the complex transmitter model's frequency to 3.2 GHz 

complexTrans.Frequency = 3.2; 

 

//Set the complex transmitter model's Power to 50 dBW 

complexTrans.Power = 50.0; 

 

//Set the complex transmitter's embedded antenna model to helix 

complexTrans.AntennaControl.SetEmbeddedModel("Helix"); 

 

//Set the beamwidth of the parablic antenna to 2 degrees 

IAgAntennaModelHelix helix = complexTrans.AntennaControl.EmbeddedModel as IAgAntennaModelHelix; 

helix.NumberOfTurns = 30.0; 

 

//Orient the complex transmitter embedded antenna's boresight to point directly at the receiver's location 

complexTrans.AntennaControl.EmbeddedModelOrientation.AssignAzEl(287.2, 83.4, AgEAzElAboutBoresight.eAzElAboutBoresightRotate); 

 

//Set the receiver to the complex model 

facilityReceiver.SetModel("Complex Receiver Model"); 

IAgReceiverModelComplex complexRcvr = facilityReceiver.Model as IAgReceiverModelComplex; 

 

//Configure the complex receiver to use the antenna object on the same parent facility, by linking 

complexRcvr.AntennaControl.ReferenceType = AgEAntennaControlRefType.eAntennaControlRefTypeLink; 

complexRcvr.AntennaControl.LinkedAntennaObject = "Antenna/FacilityDish"; 

 

//Enable rain loss computation on the receiver 

complexRcvr.UseRain = true; 

complexRcvr.RainOutagePercent = 0.001; 

 

//Enable the receiver system noise temperature computation. 

complexRcvr.SystemNoiseTemperature.ComputeType = AgENoiseTempComputeType.eNoiseTempComputeTypeCalculate; 

 

//Enable the antenna noise temperature computation 

complexRcvr.SystemNoiseTemperature.AntennaNoiseTemperature.ComputeType = AgENoiseTempComputeType.eNoiseTempComputeTypeCalculate; 

complexRcvr.SystemNoiseTemperature.AntennaNoiseTemperature.UseRain = true; 

 

//Orient the antenna object's boresight to point directly at the transmitter's location 

facilityDish.Orientation.AssignAzEl(202.6, 41.2, AgEAzElAboutBoresight.eAzElAboutBoresightRotate); 

 

//Set the antenna object's model to parabolic 

facilityDish.SetModel("Parabolic"); 

 

//Set the antenan object's design frequency to match the transmitter's 3.2 GHz 

facilityDish.Model.DesignFrequency = 3.2; 

 

//Set the antenna object's parabolic model diameter to 5 m. 

IAgAntennaModelParabolic parabolic = facilityDish.Model as IAgAntennaModelParabolic; 

parabolic.InputType = AgEAntennaModelInputType.eAntennaModelInputTypeDiameter; 

parabolic.Diameter = 5.0; 

 

//Create an access object for the access between the transmitter and recevier objects 

IAgStkAccess linkAccess = xmtrAsStkObject.GetAccessToObject(rcvrAsStkObject); 

 

//Compute access 

linkAccess.ComputeAccess(); 

 

// Get the access intervals 

IAgIntervalCollection accessIntervals = linkAccess.ComputedAccessIntervalTimes; 

 

// Extract the access intervals and the range information for each access interval 

Array dataPrvElements = new object[] { "Time", "Xmtr Gain", "Rcvr Gain", "Eb/No", "BER" }; 

 

IAgDataPrvTimeVar dp = linkAccess.DataProviders["Link Information"] as IAgDataPrvTimeVar; 

 

for (int index0 = 0; index0 < accessIntervals.Count; ++index0) 

{ 

    object startTime = null, stopTime = null; 

 

    accessIntervals.GetInterval(index0, out startTime, out stopTime); 

 

    IAgDrResult result = dp.ExecElements(startTime, stopTime, 60, ref dataPrvElements); 

 

    Array timeValues = result.DataSets[0].GetValues(); 

    Array xmtrGain = result.DataSets[1].GetValues(); 

    Array rcvrGain = result.DataSets[2].GetValues(); 

    Array ebno = result.DataSets[3].GetValues(); 

    Array ber = result.DataSets[4].GetValues(); 

 

    for (int index1 = 0; index1 < timeValues.GetLength(0); ++index1) 

    { 

        string time = (string)timeValues.GetValue(index1); 

        double xmtrGainVal = (double)xmtrGain.GetValue(index1); 

        double rcvrGainVal = (double)rcvrGain.GetValue(index1); 

        double ebnoVal = (double)ebno.GetValue(index1); 

        double berVal = (double)ber.GetValue(index1); 

        Console.WriteLine("{0}: Xmtr Gain = {1} Rcvr Gain = {2} Eb/No={3} BER={4}", time, xmtrGainVal, rcvrGainVal, ebnoVal, berVal); 

    } 

 

    Console.WriteLine(); 

}

Compute a link budget for a Transmtiter and Receiver pair, using simple models

[Visual Basic .NET] Copy Code

Dim xmtrAsStkObject As IAgStkObject = TryCast(geoTransmitter, IAgStkObject)
Dim rcvrAsStkObject As IAgStkObject = TryCast(facilityReceiver, IAgStkObject)

'Set the transmitter to the simple model
 geoTransmitter.SetModel("Simple Transmitter Model")
Dim simpleTrans As IAgTransmitterModelSimple = TryCast(geoTransmitter.Model, IAgTransmitterModelSimple)

'Set the simple transmitter model's frequency to 3.2 GHz
 simpleTrans.Frequency = 3.2

'Set the simple transmitter model's EIRP to 60 dBW
 simpleTrans.Eirp = 60

'Set the receiver to the simple model
 facilityReceiver.SetModel("Simple Receiver Model")
Dim simpleRcvr As IAgReceiverModelSimple = TryCast(facilityReceiver.Model, IAgReceiverModelSimple)

'Set the simple receiver model's G/T to 60 dB/K
 simpleRcvr.GOverT = 60

'Create an access object for the access between the transmitter and recevier objects
Dim linkAccess As IAgStkAccess = xmtrAsStkObject.GetAccessToObject(rcvrAsStkObject)

'Compute access
 linkAccess.ComputeAccess()

' Get the access intervals
Dim accessIntervals As IAgIntervalCollection = linkAccess.ComputedAccessIntervalTimes

' Extract the access intervals and the range information for each access interval
Dim dataPrvElements As Array = New Object() {"Time", "Eb/No", "BER"}
     accessIntervals.GetInterval(index0, startTime, stopTime)
     Dim result As IAgDrResult = dp.ExecElements(startTime, stopTime, 60, dataPrvElements)

Compute a link budget for a Transmtiter and Receiver pair, using complex models

[Visual Basic .NET] Copy Code

Dim xmtrAsStkObject As IAgStkObject = TryCast(geoTransmitter, IAgStkObject)
Dim rcvrAsStkObject As IAgStkObject = TryCast(facilityReceiver, IAgStkObject)

'Enable the rain loss computation on the scenario RF environment
 scenarioRFEnv.PropagationChannel.EnableRainLoss = True

'Set the transmitter to the complex model
 geoTransmitter.SetModel("Complex Transmitter Model")
Dim complexTrans As IAgTransmitterModelComplex = TryCast(geoTransmitter.Model, IAgTransmitterModelComplex)

'Set the complex transmitter model's frequency to 3.2 GHz
 complexTrans.Frequency = 3.2

'Set the complex transmitter model's Power to 50 dBW
 complexTrans.Power = 50

'Set the complex transmitter's embedded antenna model to helix
 complexTrans.AntennaControl.SetEmbeddedModel("Helix")

'Set the beamwidth of the parablic antenna to 2 degrees
Dim helix As IAgAntennaModelHelix = TryCast(complexTrans.AntennaControl.EmbeddedModel, IAgAntennaModelHelix)
 helix.NumberOfTurns = 30

'Orient the complex transmitter embedded antenna's boresight to point directly at the receiver's location
 complexTrans.AntennaControl.EmbeddedModelOrientation.AssignAzEl(287.2, 83.4, AgEAzElAboutBoresight.eAzElAboutBoresightRotate)

'Set the receiver to the complex model
 facilityReceiver.SetModel("Complex Receiver Model")
Dim complexRcvr As IAgReceiverModelComplex = TryCast(facilityReceiver.Model, IAgReceiverModelComplex)

'Configure the complex receiver to use the antenna object on the same parent facility, by linking
 complexRcvr.AntennaControl.ReferenceType = AgEAntennaControlRefType.eAntennaControlRefTypeLink
 complexRcvr.AntennaControl.LinkedAntennaObject = "Antenna/FacilityDish"

'Enable rain loss computation on the receiver
 complexRcvr.UseRain = True
 complexRcvr.RainOutagePercent = 0.001

'Enable the receiver system noise temperature computation.
 complexRcvr.SystemNoiseTemperature.ComputeType = AgENoiseTempComputeType.eNoiseTempComputeTypeCalculate

'Enable the antenna noise temperature computation
 complexRcvr.SystemNoiseTemperature.AntennaNoiseTemperature.ComputeType = AgENoiseTempComputeType.eNoiseTempComputeTypeCalculate
 complexRcvr.SystemNoiseTemperature.AntennaNoiseTemperature.UseRain = True

'Orient the antenna object's boresight to point directly at the transmitter's location
 facilityDish.Orientation.AssignAzEl(202.6, 41.2, AgEAzElAboutBoresight.eAzElAboutBoresightRotate)

'Set the antenna object's model to parabolic
 facilityDish.SetModel("Parabolic")

'Set the antenan object's design frequency to match the transmitter's 3.2 GHz
 facilityDish.Model.DesignFrequency = 3.2

'Set the antenna object's parabolic model diameter to 5 m.
Dim parabolic As IAgAntennaModelParabolic = TryCast(facilityDish.Model, IAgAntennaModelParabolic)
 parabolic.InputType = AgEAntennaModelInputType.eAntennaModelInputTypeDiameter
 parabolic.Diameter = 5

'Create an access object for the access between the transmitter and recevier objects
Dim linkAccess As IAgStkAccess = xmtrAsStkObject.GetAccessToObject(rcvrAsStkObject)

'Compute access
 linkAccess.ComputeAccess()

' Get the access intervals
Dim accessIntervals As IAgIntervalCollection = linkAccess.ComputedAccessIntervalTimes

' Extract the access intervals and the range information for each access interval
Dim dataPrvElements As Array = New Object() {"Time", "Xmtr Gain", "Rcvr Gain", "Eb/No", "BER"}
     accessIntervals.GetInterval(index0, startTime, stopTime)
     Dim result As IAgDrResult = dp.ExecElements(startTime, stopTime, 60, dataPrvElements)

Create a New Transmitter Object

[MATLAB] Copy Code

% IAgSTKObject satellite: STK object 
transmitter = satellite.Children.New('eTransmitter', 'MyTransmitter');

Modify Transmitter Model Type

[MATLAB] Copy Code

% IAgTransmitter transmitter: Transmitter object 
transmitter.SetModel('Complex Transmitter Model'); 
txModel = transmitter.Model; 
txModel.Frequency = 14; %GHz 
txModel.Power = 25; %dBW 
txModel.DataRate = 15; %Mb/sec

Modify Transmitter Embedded Antenna

[MATLAB] Copy Code

% IAgTransmitter transmitter: Transmitter object 
txModel = transmitter.Model; 
antennaControl = txModel.AntennaControl; 
antennaControl.SetEmbeddedModel('Isotropic'); 
antennaControl.EmbeddedModel.Efficiency = 85; %Percent

Modify the Linked Antenna

[MATLAB] Copy Code

% IAgTransmitter transmitter: Transmitter object 
transmitter.SetModel('Complex Transmitter Model') 
transmitter.Model.AntennaControl.ReferenceType = 'eAntennaControlRefTypeLink'; 
transmitter.Model.AntennaControl.LinkedAntennaObject = 'Antenna/MyAntenna';

Modify Transmitter Polarization Properties

[MATLAB] Copy Code

% IAgTransmitter transmitter: Transmitter object 
txModel = transmitter.Model; 
txModel.EnablePolarization = true; 
recModel.SetPolarizationType('ePolarizationTypeLinear'); 
polarization = txModel.Polarization; 
polarization.ReferenceAxis = 'ePolarizationReferenceAxisY'; 
polarization.TiltAngle = 15; %deg

Modify Transmitter Orientation and Position

[MATLAB] Copy Code

% IAgTransmitter transmitter: Transmitter object 
txModel = transmitter.Model; 
antennaControl = txModel.AntennaControl; 
antOrientation = antennaControl.EmbeddedModelOrientation; 
antOrientation.AssignAzEl(0, 90, 1); % 1 represents Rotate About Boresight 
antOrientation.PositionOffset.X = 0.0; %m 
antOrientation.PositionOffset.Y = 1; %m 
antOrientation.PositionOffset.Z = 0.25; %m

Modify Transmitter Modulator Properties

[MATLAB] Copy Code

% IAgTransmitter transmitter: Transmitter object 
txModel = transmitter.Model; 
txModel.SetModulator('BPSK'); 
txModel.Modulator.AutoScaleBandwidth = true;

Modify Transmitter Filter

[MATLAB] Copy Code

% IAgTransmitter transmitter: Transmitter object 
txModel = transmitter.Model; 
txModel.EnableFilter = true; 
txModel.SetFilter('Butterworth'); 
recFilter = txModel.Filter; 
recFilter.LowerBandwidthLimit = -20; 
recFilter.UpperBandwidthLimit = 20; 
recFilter.CutoffFrequency = 10;

Transmitter Additonal Gain

[MATLAB] Copy Code

% IAgTransmitter transmitter: Transmitter object 
txModel = transmitter.Model; 
gain = txModel.PostTransmitGainsLosses.Add(-5); %dB 
gain.Identifier = 'Example Loss';

Create a New Transmitter Object

[Python] Copy Code

# IAgSTKObject satellite: STK object 
transmitter = satellite.Children.New(24, 'MyTransmitter') # eTransmitter

Modify Transmitter Model Type

[Python] Copy Code

# IAgTransmitter transmitter: Transmitter object 
transmitter.SetModel('Complex Transmitter Model') 
txModel = transmitter.Model 
txModel.Frequency = 14 # GHz 
txModel.Power = 25 # dBW 
txModel.DataRate = 15 # Mb/sec

Modify Transmitter Embedded Antenna

[Python] Copy Code

# IAgTransmitter transmitter: Transmitter object 
txModel = transmitter.Model 
antennaControl = txModel.AntennaControl 
antennaControl.SetEmbeddedModel('Isotropic') 
antennaControl.EmbeddedModel.Efficiency = 85 # Percent

Modify Transmitter Polarization Properties

[Python] Copy Code

# IAgTransmitter transmitter: Transmitter object 
txModel = transmitter.Model 
txModel.EnablePolarization = True 
recModel.SetPolarizationType(3) # ePolarizationTypeLinear 
polarization = txModel.Polarization 
polarization.ReferenceAxis = 1  # ePolarizationReferenceAxisY 
polarization.TiltAngle = 15 # deg

Modify Transmitter Orientation and Position

[Python] Copy Code

# IAgTransmitter transmitter: Transmitter object 
txModel = transmitter.Model 
antennaControl = txModel.AntennaControl 
antOrientation = antennaControl.EmbeddedModelOrientation 
antOrientation.AssignAzEl(0, 90, 1) # 1 represents Rotate About Boresight 
antOrientation.PositionOffset.X = 0.0 # m 
antOrientation.PositionOffset.Y = 1 # m 
antOrientation.PositionOffset.Z = 0.25 # m

Modify Transmitter Modulator Properties

[Python] Copy Code

# IAgTransmitter transmitter: Transmitter object 
txModel = transmitter.Model 
txModel.SetModulator('BPSK') 
txModel.Modulator.AutoScaleBandwidth = True

Modify Transmitter Filter

[Python] Copy Code

# IAgTransmitter transmitter: Transmitter object 
txModel = transmitter.Model 
txModel.EnableFilter = True 
txModel.SetFilter('Butterworth') 
recFilter = txModel.Filter 
recFilter.LowerBandwidthLimit = -20 
recFilter.UpperBandwidthLimit = 20 
recFilter.CutoffFrequency = 10

Transmitter Additonal Gain

[Python] Copy Code

# IAgTransmitter transmitter: Transmitter object 
txModel = transmitter.Model 
gain = txModel.PostTransmitGainsLosses.Add(-5) # dB 
gain.Identifier = 'Example Loss'

CoClasses that Implement IAgTransmitter

Name
AgTransmitter

AGI STK Objects 11	Send comments on this topic.
IAgTransmitter Interface