3 Spectrum Analyzer Mode
3.9 SEM Measurement
Power Diff (Op1 – Op2)
Calculates a power difference between the First Trace operand and the Second
Trace operand and puts the result in the destination trace.
During the sweep, the following formula is executed for each point in the trace
operands, and the corresponding point is generated for the destination trace:
DestinationTrace = 10 log(10(1/10)(FirstTrace) – 10(1/10)(SecondTrace))
The values of the trace points are assumed to be in a decibel scale, as they are
internally stored.
If a point in FirstTrace is equal to maxtracevalue, the resultant point is also
maxtracevalue.
Otherwise, if the result of the subtraction is less than or equal to 0, the resultant
point is mintracevalue.
Power Sum (Op1 + Op2)
Calculates a power sum between the First Trace operand and the Second
Trace operand and puts the result in the destination trace.
During the sweep, the following formula is executed for each point in the trace
operands, and the corresponding point is generated for the destination trace.
DestinationTrace = 10 log(10(1/10)(FirstTrace) + 10(1/10)(SecondTrace))
The values of the trace points are assumed to be in a decibel scale, as they are
internally stored.
If a point in either trace operand is equal to maxtracevalue, the resultant point is
also maxtracevalue.
Log Offset (Op1 + Offset)
Calculates a log offset from the First Trace operand and puts the result in the
destination trace. This is like the B-DL function in some older instruments. The offset
is entered on the Offset control, which only appears when this math function is in
force for the selected trace. Each destination trace has its own offset.
During the sweep, the following formula is executed for each point in the trace
operand, and the corresponding point is generated for the destination trace.
DestinationTrace = FirstTrace + Offset
The values of the trace points are assumed to be in dBm (as they are internally
stored) and the offset is in dB.
If a point in the trace operand is equal to maxtracevalue, the resultant point is also
maxtracevalue.
1746 Spectrum Analyzer Mode User's &Programmer's Reference
To Next Page
Loading...
Need help?
General
