Agilent Technologies 8510C Manual de servicio descargar pdf (Pagina 112)

3-42 8510XF Network Analyzer Systems

Operation

IF Frequency

The IF used by the network analyzer is nominally 20 MHz. However, it is

desirable to add a slight offset to that frequency; the offset provides

immunity against spurious 20 MHz signals, which can have a detectable

impact on measurement when averaging is used. In the 8510XF, the factory

preset default value of the IF is 20.000017 MHz (in other words, an offset of

17 Hz has been added).

The key sequence

[SYSTEM] {MORE} {IF FREQ}, followed by a frequency, can be

used to change the value of the IF frequency. The effective range of

modiﬁcation is restricted by hardware performance characteristics (typically,

the IF range is 20 MHz

+10 kHz).

NOTE At measurement frequencies greater than 18 GHz, the actual IF may differ

slightly from the set value, owing to the frequency resolution of the RF and

LO sources.

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Agilent Technologies 8510C Manual de servicio Pagina 112