(FRA frequency range extension)
Frequency range: 24 MHz … 6.2 GHz.
Generator output level: 0 dBm.
Mixer unit transfer ratio (from RF Input to IF Output): 0 dB.
IF bandwidth: 100 kHz … 25 MHz.
Recommended setting for IF frequency: 21.395 MHz.
Dynamic range (over the entire frequency range, with RBW 22 Hz): >95 dB.
Initial overall flatness before calibration (over the entire frequency range): <2.5 dB.
Block diagram for transceiver mode
Extension of the frequency range up to 500 MHz for FRA and antenna analyzer modes
The device in the FRA and AA modes can operate on the harmonics of the generator signal. To obtain a high level of harmonics in the spectrum, you can use a rectangular pulse shaper using digital logic from the LVC family. The fast slew rate of the ICs provides a high level of odd harmonics in the output signal even at high frequencies.
High impedance FET probe
High-speed (500 MHz) FET operational amplifier OPA653 is used. The attenuation ratio is 1x (one-to-one), the input capacitance is about 4 pF.