bg2wrj
:哪位大神研究下其原理 给扩展一下 非要 K系列用么 ？ 若扩展到 适用于多数电台 那就漂亮了 590 7410 950 啥的 都可用上了[表情]
(2014-12-06 10:03) 
p3不是非k3不行的，其他的中频输出范围是455 kHz 到21.7 MHz之间的都行。
关于p3和px3的区别，参见e家的问答
Q: How does the PX3 (used with the KX3) compare to the P3 (used with the K3)?
A: The PX3 has nearly all of the same features as the P3*, including the same high-resolution color display, 2 to 200 kHz SPAN, fast sweep rates, and 8 programmable “hot keys” to do quick setup. The primary difference between the two is in the interface to the transceiver. The P3 digitally down-converts the K3’s 8.215-MHz I.F. signal, while the PX3 uses quadrature baseband demodulation (I/Q) to convert signals from the KX3’s RX I/Q output jack. The PX3’s method requires less interface and demodulation circuitry, resulting in a significantly lower-cost unit with lower power consumption (consistent with portable use). For details on how baseband I/Q demodulation impacts performance, see the next item.
* “Fixed tune" mode is not yet available in the PX3. If this feature is added at a future date, it may have somewhat different performance than in the P3, in terms of displayed bandwidth and allowed offset from the currently-tuned frequency.
