IQ Signal Masterâ„¢ MX280005A Vector Signal Analysis Software Help : Basic Operation : Modulation Parameters Tab : IQ File Descriptions
 
IQ File Descriptions
Click the IQ File summary icon to display information of the saved IQ data recorded as shown in the data information file listed in Table: Format of Data Information File.
Format of Data Information File
IQ File Parameter
Descriptions
CaptureDate
Day/Month/Year of the captured data in the DD/MM/YYYY format.
CaptureTime
Data captured time in HH/MM/SS format.
FileName
Data file name
Format
Data format, fixed to Float
CaptureSample
Number of samples of the recorded data (Sample).
Condition
Error status of the recorded data
Normal: No error
OverLoad: Level over
TriggerPosition
Trigger occurrence position (Sample). The start point of the recorded data is 0.
CenterFrequency
Center frequency (Hz)
SpanFrequency
Frequency span (Hz)
SamplingClock
Sampling rate (Hz)
PreselectorBandMode
Frequency band switch mode
Normal: Normal mode
Spurious: Spurious mode
ReferenceLevel
Reference level (dBm)
AttenuatorLevel
Attenuator value (dB)
InternalGain
Internal gain value (dB). This is an internal parameter.
PreAmp
Gain value obtained by PreAmp (dB)
IQReverse
IQ reverse setting, fixed to Normal
TriggerSwitch
Trigger On/Off setting
FreeRun: Trigger is not used
Triggered: Trigger is used
TriggerSource
Trigger source
External: External trigger
SGMarker: SG marker trigger
TriggerLevel
Trigger level (dBm) This value does not include the reference level offset. It is in dBm units, even if the scale mode is Lin.
TriggerDelay
Trigger delay time (s) It is the relative time from the trigger input position to the start point of the recorded data.
IQReference0dBm
Reference IQ amplitude value that indicates 0 dB.
Fixed to 1.
ExternalReferenceDisp
Reference signal information
Ref.Int: Internal reference signal
Ref.Ext: External reference signal
Ref.Int Unlock: Internal reference signal is unlocked.
Ref.Ext Unlock: External reference signal is unlocked.
Correction Factor
Correction value of correction function (dB) The correction factor is added to the IQ data in a data file. 0.000 is automatically set when the Correction function is set to Off.
Terminal
Signal input terminal RF: RF terminal
ReferencePosition
0-second reference position Indicates the 0-second reference position using the digitized data point position. During Replay function execution, the reference position is displayed as 0 s.
Trigger Slope
Selects the edge where the trigger is generated (rise or fall).
Rise: Rising edge
Fall: Falling edge
Format of Data File
The data file is created in binary format. From the beginning of the file, I-phase data and Q-phase data are recorded by 4 bytes. The I-phase data and Q-phase data are recorded as a float type.
Beginning of file:
I-phase data 1 (4Byte)
Q-phase data 1 (4Byte)
I-phase data 2 (4Byte)
Q-phase data 2 (4Byte)
I-phase data 3 (4Byte)
Q-phase data 3 (4Byte)
The IQ data can be converted to power based on the following formula.
P=10Log10(I2+Q2)
P: Power (dBm)
I: I-phase data
Q: Q-phase data