IDT DAC1627D, Быстрые руководства пользователя

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How to specify the correct settings for the Spectrum analyzer?
You need to find the optimum mixer levels to avoid
to measure the distorsion created by the equipment.
When measuring a signal of 0dBm power, to avoid to
get
H2 coming from the Spectrum analyser mixer, a -
40dB attenuator level need to be set (it also depends
of the RBW)
If the signal is about -10dBm, then use 30dB of
attenuation to get -10 -30 = -40dBm at the mixer
input.
When measuring
Intermodulation product (IMD3)
for a -6dBm signal, please use 22dB attenuation to
avoid intermodulation product coming from the
equipment.
-6-22= -28dBm at the mixer input.
Please update the figures regarding the type of
equipment you are using (cf datasheet of the
equipment).