public bool SaGetPeakFreq(out double peak_freq, out float peak_pwr, double begin_freq, double end_freq, double rbw)
{
double vbw = rbw;
double span = end_freq - begin_freq;
double center_freq = begin_freq + span / 2;
//saStatus status = saStatus.saNoError;
sa_api.saConfigCenterSpan(device_id, center_freq, span);
//detector and scale.
sa_api.saConfigAcquisition(device_id, sa_api.SA_MIN_AND_MAX, sa_api.SA_LOG_SCALE);
sa_api.saConfigLevel(device_id, 0);
sa_api.saConfigSweepCoupling(device_id, rbw, vbw, true);
// Initialize the device with the configuration just set
saStatus status = (sa_api.saInitiate(device_id, sa_api.SA_SWEEPING, 0));
if (status != saStatus.saNoError) //saStatus
{
// Handle unable to initialize
//Console.WriteLine("Sa device initial error.\r\n");
peak_freq = 0;
peak_pwr = 0;
return(false);
}
// Get sweep characteristics
int[] sweepLen = new int[1];
double[] startFreq = new double[1];
double[] binSize = new double[1];
sa_api.saQuerySweepInfo(device_id, sweepLen, startFreq, binSize);
//Console.WriteLine("total point count = " + sweepLen[0].ToString());
//Console.WriteLine("startfreq = " + startFreq[0]);
//Console.WriteLine("binsize = " + binSize[0]);
double res_freq = span / (sweepLen[0] - 1);
//Console.WriteLine("res freq = " + res_freq.ToString());
// Allocate memory for the sweep
float[] min = new float[sweepLen[0]];
float[] max = new float[sweepLen[0]];
// Get one sweep
sa_api.saGetSweep_32f(device_id, min, max);
//sa_api.saCloseDevice(device_id);
peak_pwr = min.Max();
int index = Array.IndexOf <float>(min, peak_pwr);
peak_freq = index * res_freq + startFreq[0];
//Console.WriteLine("Find peakpower {0}dbm at {1}, freq= {2}", max_value, index, peak_freq);
//sa_api.saAbort(device_id);
return(true);
}
//public delegate void AddLogEventHandler(String Message);
public bool OpenDevice()
{
status = sa_api.saOpenDevice(ref device_id);
if (status != saStatus.saNoError)
{
device_name = null;
device_id = -1;
return(false);
}
device_name = DeviceName;
//Form1.AddlogEventHandler("xx");
//sa_api.saCloseDevice(device_id);
return(true);
}
//public delegate void AddLogEventHandler(String Message);
public bool OpenDevice()
{
status = sa_api.saOpenDevice(ref device_id);
if (status != saStatus.saNoError)
{
device_name = null;
device_id = -1;
return false;
}
device_name = DeviceName;
//Form1.AddlogEventHandler("xx");
//sa_api.saCloseDevice(device_id);
return true;
}
private static extern IntPtr saGetErrorString(saStatus status);
public static string saGetStatusString(saStatus status)
{
IntPtr str_ptr = saGetErrorString(status);
return System.Runtime.InteropServices.Marshal.PtrToStringAnsi(str_ptr);
}
private static extern IntPtr saGetErrorString(saStatus status);
public static string saGetStatusString(saStatus status)
{
IntPtr str_ptr = saGetErrorString(status);
return(System.Runtime.InteropServices.Marshal.PtrToStringAnsi(str_ptr));
}