Description
R&S SMHU is ideal for applications which the majority of signal generators
cannot handle. In addition to out-of-channel measurements, they are for instance able to
determine the spurious rejection of radiotelephone equipment up to 4 GHz as laid down
by CEPT.
R&S SMHU: 100 kHz to 4320 MHz
Frequency
The frequency can be set with a resolution of 0.1 Hz over the entire range, and this is sufficient
even for measurements on extremely narrowband DUTs. R&S SMHU supplies frequencies
down to 1 kHz. The frequency setting time is below 10 ms. In the fast mode up to 200 user-defined
frequencies can be handled by means of a trigger signal or by memory sweep in less than
1 ms per setting.
Spectral purity
R&S SMHU fulfill requirements for selectivity measurements on top-class receivers.
Signals of extremely high spectral purity afford critical adjacent-channel, in-channel
and out-of-channel measurements with a wide tolerance margin. Phase noise remains low
right up to the carrier. R&S SMHU is therefore ideal for LO applications or as a low-noise
reference in noise measurement systems.
Frequency modulation
The FM modulation frequency range extends from DC to 1 MHz. In FM DC mode a high
carrier-frequency accuracy is attained. The frequency offset occurring with FM DC selected
is extremely small.
