DTMF 操作 30 CHAPTER DTMF Operation
本章要点：DTMF（双音多频）信号既可以用来拨打公共电话网，也可以用来控制中继台与网络链路。本章说明如何在 FTX-1 中 注册最多 9 组、每组 16 位的 DTMF 码，以及如何用已注册的存储自动发送、或在按住 PTT 的状态下手动逐位发送。
30-1 What Is DTMF · DTMF 是什么
DTMF（双音多频）是为拨打电话或控制中继台、网络链 DTMF (Dual Tone Multi Frequencies) are the tone signals 路而发送的音频信号。 sent to make telephone calls, or control repeaters and 本收发信机最多可存储 9 组、每组 16 位的 DTMF 音频代 network links. 码，作为"电话号码"使用，通过电话互联（phone Up to 9 registers of 16-digit DTMF tone codes can be patch）接入公共电话网拨号，或通过 WIRES-X 模拟节点 stored as telephone numbers to make calls through the 台建立连接。 public telephone network using a phone patch, or to connect through the WIRES-X analog node station.
表 30-1 DTMF 存储容量 Table 30-1 DTMF memory capacity
项目 规格 说明 Item Specification Description
DTMF MEMORY 1~9 共 9 个 DTMF 存储寄存器，编号 DTMF MEMORY1 至 9
Maximum digits 16 digits 每个存储最多可输入 16 位 DTMF 码
Operating mode FM 注册前需在 [RADIO SETTING] → [MODE FM] 下操作
30-2 Registering the DTMF Memory · 注册 DTMF 存储
1. 按住 [FUNC] 旋钮。 1. Press and hold the [FUNC] knob. 2. 选择 [RADIO SETTING] → [MODE FM]。 2. Select [RADIO SETTING] → [MODE FM]. 3. 旋转 [FUNC] 旋钮，选择要注册 DTMF 码的存储信道 3. Rotate the [FUNC] knob to select the desired channel （DTMF MEMORY1 至 9），然后按 [FUNC] 旋钮， (DTMF MEMORY1 to 9) to register the DTMF code, 屏幕显示 DTMF 存储信道输入界面。 then press the [FUNC] knob. The DTMF memory 4. 触摸屏幕上的数字键盘，输入 DTMF 码，最多 16 channel input screen is displayed. 位。 4. Touch the numeric keypad of the screen to input the DTMF code up to a maximum of 16 digits. 5. 触摸 [ENT] 保存该 DTMF 码。
5. Touch [ENT] to save the DTMF code. 6. 多次按 [BACK] 键返回正常工作状态。
6. Press the [BACK] key several times to return to normal operation.
技术提示 / TIP
注册前先把工作模式设为 FM：DTMF 存储位于 [RADIO SETTING] → [MODE FM] 之下，若在 SSB/CW 等模式下进入菜单， 将看不到 DTMF MEMORY 条目。习惯做法是把常用的中继控制码与节点接入码分别存在 DTMF MEMORY1~3，避免每次临 时逐位输入。 Set the mode to FM before registering: the DTMF memories live under [RADIO SETTING] → [MODE FM]. Keep frequently used repeater control codes and node access codes in DTMF MEMORY1 to 3 so you do not have to key them in digit by digit every time.
30-3 Transmitting DTMF Code Automatically Using DTMF Memory · 用 DTMF 存储自动发送 DTMF 码
1. 按住 [FUNC] 旋钮。 1. Press and hold the [FUNC] knob. 2. 触摸 [DTMF]，或旋转 [FUNC] 旋钮选择 [DTMF] 后按 2. Touch [DTMF], or rotate the [FUNC] knob to select [FUNC] 旋钮，屏幕显示 DTMF CODE 界面。 [DTMF] and then press the [FUNC] knob. The DTMF 3. 触摸或旋转 [FUNC] 旋钮，选择所需的 DTMF 存储（1 CODE screen is displayed. 至 9）。 3. Touch, or rotate the [FUNC] knob, to select the desired 4. 多次按 [BACK] 键返回正常工作状态。 DTMF memory (1 to 9). 4. Press the [BACK] key several times to return to normal 所选 DTMF 存储中已注册的代码会被自动发送出去。发射 operation. 将一直持续到该 DTMF 码发送完毕，随后收发信机自动回
The DTMF code registered in the DTMF memory channel is 到接收状态。
automatically transmitted. The transmission continues until the DTMF code is completed; the transceiver is then automatically returned to receive mode.
30-4 Manually Transmitting the DTMF Code · 手动发送 DTMF 码
1. 按住 [FUNC] 旋钮。 1. Press and hold the [FUNC] knob. 2. 触摸 [DTMF]，或旋转 [FUNC] 旋钮选择 [DTMF] 后按 2. Touch [DTMF], or rotate the [FUNC] knob to select [FUNC] 旋钮，屏幕显示 DTMF CODE 界面。 [DTMF] and then press the [FUNC] knob. The DTMF 3. 在按住 PTT 开关不放的同时，使用屏幕上的数字键盘 CODE screen is displayed. 按顺序逐个触摸 DTMF 码的每一位，即可将该码发送 3. While pressing and holding the PTT switch, use the 出去。 numeric keypad of the display and touch each digit of the DTMF code in sequence to transmit the code.
30-5 Automatic vs. Manual Sending · 两种发送方式的取舍
当同一个代码需要反复发送时，使用 DTMF 存储：整串码 Use a DTMF memory when the same code is sent 一次操作发完，收发信机自行回到接收。 repeatedly: the whole string goes out in one operation and 当代码只用一次，或者需要等节点台、电话互联给出语音 the transceiver drops back to receive by itself. 提示后再敲下一位时，用手动发送更合适。 Use manual sending when the code is a one-off, or when you must wait for a voice prompt from the node or phone patch before keying the next digit.
HAM 实战 · DTMF 在中继与电话互联中的用法 FIELD NOTE
DTMF 最常见的两类用途是"中继控制"和"节点/电话互联接入"。① 中继控制：许多模拟中继用一串 DTMF 码来开启/关闭链 路、切换呼叫路由或查询状态，这类码通常很短（3~6 位），注册进 DTMF MEMORY 后一键发出，比手动逐位敲可靠得多， 也避免在弱信号区因按键间隔过长被中继判为无效。② 电话互联与 WIRES-X 模拟节点：拨号串较长且必须连续发出，务必用 存储自动发送；手动发送时一旦 PTT 中途松开，链路会掉线，需要从头重拨。③ 发送时机：先确认频率静默、中继回落音结 束后再发；发码时保持麦克风音量正常，过高的 AF 电平会令接收端解码器误判。④ 若对方提示"无效代码"，优先核对位数与 * / # 是否被计入，再核对中继的控制码表，而不是反复加大功率。 DTMF is used mainly for repeater control and for phone-patch / WIRES-X analog node access. (1) Repeater control: many analog repeaters take a short DTMF string (typically 3 to 6 digits) to link up, unlink, reroute or query status. Registering it in a DTMF memory sends the whole string in one shot — far more reliable than keying digits by hand, and it avoids the repeater rejecting the string because of long gaps between digits in a weak-signal area. (2) Phone patch and WIRES-X node access: dial strings are long and must be sent continuously, so always use a memory; with manual sending, releasing PTT halfway drops the link and you must redial from the start. (3) Timing: wait for the repeater tail to finish and confirm the frequency is clear before sending, and keep normal microphone AF level — excessive AF level causes decoder errors at the receiving end. (4) If the system answers "invalid code", check the digit count and whether * / # are counted, then re-check the repeater's control code table, instead of simply raising power. （社区经验）