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Chapter 2 81
Option B25 (25 MHz) - Analysis Bandwidth
Other Analysis Bandwidth Specifications
Other Analysis Bandwidth Specifications
Description Specification
Supplemental
Information
IF Spurious Response, 25 MHz IF
Bandwidth (Option B25)
a
a. To save test time, the levels of these spurs are not warranted. However, the relationship
between the spurious response and its excitation is described so the user can distinguish
whether a questionable response is due to these mechanisms or is subject to the specifications
in “Spurious Responses” in the core specifications. f is the apparent frequency of the spurious,
fc is the measurement center frequency.
Mixer
Level
b
b. Mixer Level = Input Level − Input Attenuation.
IF
Gain
Preamp Off
c
c. The spurious response specifications only apply with the preamp turned off. When the preamp
is turned on, performance is nominally the same as long as the mixer level is interpreted to be:
Mixer Level = Input Level − Input Attenuation − Preamp Gain
IF second harmonic
d
d. IF second harmonic significant only for Pre-FFT BW ≥10 MHz.
Apparent
Freq. (f)
Excitation Freq.
Any on-screen f (f + f
c
+ 22.5 MHz)/2 −15 dBm Low −54 dBc (nominal)
−25 dBm High −54 dBc (nominal)
IF conversion image
e
e. IF conversion image significant only for Pre-FFT BW ≥10 MHz.
Apparent
Freq. (f)
Excitation Freq.
Any on-screen f 2 × f
c
− f + 45 MHz −10 dBm Low −70 dBc (nominal)
−20 dBm High −70 dBc (nominal)