Operating Manual Vol 1 - ES Documentation

Analog ModulationsSMIQ2.7.4.1 PM Deviation LimitsThe maximal deviation depends on the RF frequency set (cf. Fig. 2-31). It is possible to enter adeviation that is too high for a certain RF frequency or to vary the RF frequency to a range in which thedeviation can no longer be set. In this case the maximally possible deviation is set and an errormessage displayed.In the RF range 450 to 750 MHz and 1200 MHz to 1500 MHz a different synthesis range is selecteddepending on the deviation set. If the deviation is smaller than 5 rad or 10 rad, the synthesizer is in thenormal mode with optimal spectral purity. If the deviation set is larger, the I/Q mode is automaticallyselected.I/Q modenormal modemaximalPM-deviation[rad]20105Fig. 2-310,3 450 750 1200 1500 3300RF-frequency [MHz]Dependency of the PM maximal deviation on the RF frequency set1125.5555.03 2.64E-8