(Read-Only) Reads data from the current channel measurement (Channel Power, Occupied Bandwidth, or Adjacent Channel Power).
Data is returned in the following format: Main channel - main channel power in dBm. Main channel - main channel Power Spectral Density (PSD) in dBm/Hz. Main channel - relative power to main channel power (this value is always zero).
Lower Offset Frequency (1) - channel power for lower offset 1 in dBm. Lower Offset Frequency (1) - PSD for lower offset 1 in dBm/Hz. Lower Offset Frequency (1) - relative power of lower ACPR for offset 1 in dBc or dB.
Upper Offset Frequency (1) - channel power for upper offset 1 in dBm. Upper Offset Frequency (1) - PSD for upper offset 1 in dBm/Hz. Upper Offset Frequency (1) - relative power of upper ACPR for offset 1 in dBc or dB.
Lower Offset Frequency (2) - channel power for lower offset 2 in dBm. Lower Offset Frequency (2) - PSD for lower offset 2 in dBm/Hz. Lower Offset Frequency (2) - relative power of lower ACPR for offset 2 in dBc or dB.
Upper Offset Frequency (2) - channel power for upper offset 2 in dBm. Upper Offset Frequency (2) - PSD for upper offset 2 in dBm/Hz. Upper Offset Frequency (2) - relative power of upper ACPR for offset 2 in dBc or dB.
Lower Offset Frequency (3) - channel power for lower offset 3 in dBm. Lower Offset Frequency (3) - PSD for lower offset 3 in dBm/Hz. Lower Offset Frequency (3) - relative power of lower ACPR for offset 3 in dBc or dB.
Upper Offset Frequency (3) - channel power for upper offset 3 in dBm. Upper Offset Frequency (3) - PSD for upper offset 3 in dBm/Hz. Upper Offset Frequency (3) - relative power of upper ACPR for offset 3 in dBc or dB.
For Spectral Emission Mask (SEM): This returns an array of 68 comma separated Values (index 0 thru index 67) Value[0] is “1” for Overall FAILure, or “0” for PASS (the next 3 entries are the primary Reference Channel measurement results, seen on-screen by varying MeasType) Value[1] is the Total Power integrated for the reference channel Value[2] is the Power Spectral Density (PSD) of the reference channel Value[3] is the Spectrum Peak amplitude found in the reference channel
(the last 64 entries are 8 per offset, for up to 8 offset segments, beginning with the first offset #1) (first indeces 4-7 are for the Lower (Negative) side of offset #1) Value[4] is “1” for FAILure of this segment side (“0” for PASS) Value[5] is the peak power (or PSD) value closest to the limit (noted peak, seen as column dBm or dBm/Hz) Value[6] is the relative dB limit value for the noted peak (power relative to the limit, seen as column dB lim) Value[7] is the offset frequency for the noted peak (seen as column pk Freq)
(next indeces 8-11 are for the Upper (Positive) side of offset #1) Value[8] is “1” for FAILure of this segment side (“0” for PASS) Value[9] is the peak power (or PSD) value closest to the limit (noted peak, seen as column dBm or dBm/Hz) Value[10] is the relative dB limit value for the noted peak (power relative to the limit, seen as column dB lim) Value[11] is the offset frequency for the noted peak (seen as column pk Freq)
The above 8-pattern repeats, for offset #2 thru offset #8… covering indeces #12 thru #67 If any offset is disabled, or any offset side is restricted, then ZEROs will fill the 4 or 8 Value slots for that segment/side.
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Relevant Modes |
SA |
Examples |
The following data is returned for an ACPR channel measurement. Offsets that are not defined return invalid data. CALC:MEAS:DATA? 'With only one defined offset, returns -6.73047890E+01,-1.303150890E+02,0.0000000E+00, |
Return Type |
Block data |
Default |
Not Applicable |
Last Modified:
18-May-2011 |
Modified description text |