我们正在使用HMC6300、HMC6301作为一个功率收发系统，准备通过单片机向HMC6300的BB_I/Q端发送信号，但是BB_I/Q端没有说明具体输入频率，数据手册里面Theory of operation第二段话有一句，是不是说I/Q的输入信号频率为8~9.1GHz，IF带宽为1.8GHz的意思呢？现在我们就想知道从I/Q端输入的信号频率（范围）应该是多少？谢谢！
If the chip is configured for IQ baseband input, these signals are quadrature modulated onto an 8 to 9.1 GHz sliding IF
using the synthesized LO divided by two. There are also options to input AM/FM/FSK/MSK waveforms directly to the
on-chip IF modulators. The IF signal is then filtered and amplified with 14 dB of variable gain, then mixed with three
times the LO frequency to upconvert to an RF frequency between 57 and 64 GHz. Integrated notch filters attenuate
the lower mixing product at 40 - 46 GHz. Three RF amplifier stages provide gain to allow up to 15 dBm of linear and
differential output power with 22 dB of variable gain. IF and RF gain can be controlled using either analog voltages or
the digital SPI . For lower power consumption, half of the PA can be disabled to run in a single-ended configuration.
This drops the output power by 3 dB.