Users manual
FA845
version 1.5
Envionic
32
The Resolution bandwidth (RBW) can be used to make a trade-off between sensitivity and measurement
time:
Low RBW: High sensitivity (low noise level), but slow measurement.
High RBW: Fast measurement, but lower sensitivity (high noise level)
Image frequency detection:
In XPRT mode, you can switch to another intermediate frequency with the IF-A function.
Pressing the same button again(it is now called IF-B) will switch back to the first intermediate
frequency.
A real signal will be visible (at the same frequency) for both values of the intermediate
frequency. But a mirror image will only be visible at one of both intermediate signals (or it
might also seem to change frequency).
For an explanation of mirror image frequencies, please consult Wikipedia on the subject
"superheterodyne" receiver (The spectrum analyzer is based on the superheterodyne principle).
The above section seems to imply that the intermediate frequency can be one of two fixed values. But in
fact, these two frequencies are also dependent on the frequency that is received.
