双频接收与 Split 操作 16 CHAPTER Dual Receive & Split Operation
本章要点：FTX-1 的 MAIN 侧与 SUB 侧各自拥有独立的 VFO 寄存器，这既是双频接收（Dual Receive）的基础，也让异频 （Split）操作变得非常简单。本章说明 MAIN / SUB 双频画面的构成与切换，以及 Split 操作的完整步骤、发射频率的监听方法 与退出方式。
16-1 Dual band screen · 双频接收画面
这是双频操作画面，MAIN 与 SUB 频率上下显示。重要接 This is the screen for dual band operation, where MAIN 收设置分别针对 MAIN 侧与 SUB 侧显示。 and SUB frequencies are displayed above and below. The 单频画面是只显示 MAIN 或 SUB 单个频率的单频操作画 important receiver settings are shown for the MAIN side and for the SUB side respectively. 面。每按一次 SUB DIAL 旋钮，即在 MAIN 与 SUB 之间 切换。 The single band screen is the screen for single band operation where only the MAIN or SUB frequency is displayed. Each time you press the SUB DIAL knob, it switches between MAIN and SUB.
在双频画面上，屏幕底部的接收设置会为两侧分别显示， On the dual band screen the receiver settings at the 因此可以一眼确认哪一侧启用了 ATT、IPO、DNF 或 bottom of the display are duplicated for the two sides, so AGC。请记住，第 15 章的 DSP 干扰抑制功能同样是按两 you can confirm at a glance which side has ATT, IPO, DNF 侧分别设置的。 or AGC engaged. Remember that the DSP interference removal functions of Chapter 15 are also set independently for each side.
16-2 Split Operation · Split（异频）操作
FTX-1 的一项强大能力，是利用 MAIN 侧与 SUB 侧的频 A powerful capability of the FTX-1 is its flexibility in Split 率寄存器灵活地进行异频（Split）操作。这使 FTX-1 在高 Frequency operation using the MAIN-side and SUB-side 级别 DX-pedition 中格外有用。Split 操作功能非常先 frequency registers. This makes the FTX-1 especially useful 进，且易于使用。 for high-level DX-peditions. The Split operation capability is very advanced and easy to use.
操作步骤
Setup Procedure
1. 把 MAIN 侧 VFO 频率设定为所需的接收频率。 1. Set the MAIN-side VFO frequency to the desired 2. 按住 [SPLIT] 键，然后把 SUB 侧 VFO 频率设定为所需 receive frequency. 的发射频率。 2. Press and hold the [SPLIT] key, and then set the SUB- side VFO frequency to the desired transmit frequency. Split 操作期间，MAIN 侧 VFO 寄存器用于接收，SUB 侧 VFO 寄存器用于发射。 During Split operation, the MAIN-side VFO register will be used for reception, while the SUB-side VFO register will be 再次按住 [SPLIT] 键，即取消 Split 操作。 used for transmission.
Press and hold the [SPLIT] key again to cancel Split operation.
16-3 Listening on the transmit frequency · 监听发射频率
异频操作期间，按住 [FUNC] 旋钮后触摸 [TXW]，即可收 During split operation, touch [TXW] after pressing and 听发射频率；按下 [FUNC] 旋钮返回。 holding the [FUNC] knob, to receive the transmit [TXW] 是 [FUNC] 旋钮功能列表中的项目之一，其说明 frequency; press the [FUNC] knob to return. 为：异频操作时，触摸 [TXW] 可收听发射频率。 [TXW] is one of the items on the [FUNC] knob function list, described as: during split operation, touch [TXW] to listen on the transmitter frequency.
避坑指南 · Split 操作的常见失误 PITFALL
①最常见的失误是"设完 SUB 频率就以为自己在异频"——必须按住 [SPLIT] 键后才进入异频状态，只把 SUB 调到目标频率不 会改变收发关系。②呼叫前一定要用 [TXW] 先听一下发射频率：DX 台上行窗口往往很窄，上行有人占用、或有台正在那 里"压台"时，盲目发射只会造成互相干扰。③发射频率必须落在自己执照允许的波段范围内，DX 台公布的"up 5"等上行频偏 不能把你推到波段外。④双频画面下底部的接收设置是分 MAIN / SUB 两侧显示的，调 ATT / IPO / AGC 时请确认自己调的 是接收那一侧（MAIN）；发射侧的 DSP 设置不影响你听到的声音。⑤退出异频要再次按住 [SPLIT] 键，只把 SUB 调回与 MAIN 相同频率并不会自动退出，此时机器仍以 SUB 寄存器发射。 (1) The most common mistake is assuming you are split as soon as you have set the SUB frequency — you must press and hold the [SPLIT] key to enter split state; merely tuning SUB to the target frequency does not change the transmit/receive relationship. (2) Always listen on the transmit frequency with [TXW] before calling: a DX station's listening window is often very narrow, and transmitting blindly when someone is already using it, or when a station is "policing" the frequency, only causes mutual interference. (3) Your transmit frequency must remain inside the band limits of your licence — a published offset such as "up 5" must never push you outside the band. (4) On the dual band screen the receiver settings at the bottom are shown separately for MAIN and SUB; when adjusting ATT / IPO / AGC, confirm that you are adjusting the receiving side (MAIN). DSP settings on the transmit side do not affect what you hear. (5) To leave split, press and hold the [SPLIT] key again; simply returning SUB to the same frequency as MAIN does not exit split, and the radio will still transmit on the SUB register.
注意 · Split 与存储体系的关系 NOTE
Split 是基于 MAIN / SUB 两套 VFO 寄存器的临时状态，断电或切换波段后不会"半永久"保留，请每次通联前重新确认收发频 率。若需要长期保存一对收发频率，应使用 Split Memory（把两个不同的频率——一个接收、一个发射——注册到同一个存 储信道），或 HOME 信道。 Split is a temporary state based on the two MAIN / SUB VFO registers; it is not retained semi-permanently after power-off or a band change, so always re-confirm the receive and transmit frequencies before each contact. If you need to keep a transmit/receive pair for the long term, use Split Memory — registering two different frequencies, one for receive and another for transmit, to a single memory channel — or the HOME channel.
PART IV
第四部分通信模式操作 Operating Modes
按模式分章：SSB / AM 语音、CW 报务、FM / C4FM 与中继、以及 FT8 / RTTY / PSK 数据模式。每一章都可以独立阅 读，但第 17 章的收发基础操作建议先看。
17 语音通信（SSB / AM） Voice Communications (SSB and AM)
18 CW 报务操作 CW Mode Operation
19 FM / C4FM 与中继操作 FM / C4FM Mode & Repeater Operation
20 数据模式（FT8 / RTTY / PSK） DATA (FT8 / RTTY / PSK) Operation