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Find an analog CTCSS or DCS tone on DA-7X2
What this lets you do
Let a steady analog signal run while the radio tests CTCSS or DCS values.
On a verified analog channel, start the radio’s CTCSS/DCS discovery function and keep the source transmitting long enough for a match. Save nothing until the same result opens audio on a second controlled test.
This procedure is verified for DA-7X2. The exact DMR-6X2 and DMR-6X2 PRO workflows were not proven by the current first-party sources, so those radios are excluded rather than guessed. CTCSS/DCS applies to analog receive; it is not a DMR color-code scanner and does not decode DTMF, 2-Tone, or 5-Tone signaling.
Verified compatibility
Use only the verified models and analog mode
A discovered tone is an access/filter setting, not privacy, encryption, or permission to transmit. Verify frequency and authorization separately.
| Model | Verified procedure | Required version | Important difference |
|---|---|---|---|
| DMR-6X2 | Not yet verified | — | Do not import the DA menu path; use BTECH Support until an exact current-radio test confirms this function. |
| DMR-6X2 PRO | Not yet verified | — | Do not follow this guide on PRO until exact radio/CPS behavior is independently confirmed. |
| DA-7X2 | Assign CDT Scan to a programmable key, then run it on the selected analog channel | Current public DA firmware | Keep separate from Freq Sync, DTMF, 2-Tone, 5-Tone, and DMR Digital Monitor. |
Find and prove the tone
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Select the analog receive channel
Set the correct receive frequency and use normal analog FM mode. Remove an incorrect receive tone if it is preventing you from hearing the test signal.
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Assign and start CDT Scan
In the DA-7X2 CPS, assign CDT Scan to a programmable key, write the reviewed change, then use that key on the selected analog channel. Choose CTCSS or DCS deliberately when the radio separates them.
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Keep the source transmitting
Use a steady test carrier with the unknown tone. Watch for the search to stop or display a candidate value.
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Write down the first result
Do not immediately make it permanent. Note whether it is CTCSS frequency or DCS code/polarity.
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Repeat the search
Clear/restart discovery on a second steady transmission. A repeat match is stronger evidence than one brief stop.
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Verify normal receive
Enter the candidate as the receive tone, turn discovery off, and confirm audio opens for the intended source but stays closed for an untoned or differently toned control signal.
Keep four look-alike features separate
| Feature | What it identifies | What it does not identify |
|---|---|---|
| CTCSS/DCS discovery | Analog sub-audible receive tone/code | DMR color code, DTMF number, 2-Tone/5-Tone sequence |
| Digital Monitor | Received DMR color code/slot/talkgroup/call activity | Analog CTCSS/DCS |
| Freq Sync | Copies or coordinates supported channel/frequency information on models that provide it | A guaranteed hidden analog tone on every model |
| DTMF / 2-Tone / 5-Tone | Separate signaling/dial/selective-call formats | The continuous sub-audible squelch code |
Fix the symptom you can see
| What happened | Likely reason | Next check |
|---|---|---|
| Search never stops | Signal too short/weak, wrong frequency/mode, or testing the wrong tone family | Use a steady strong analog source and try CTCSS versus DCS deliberately. |
| Different result each time | Weak/noisy signal or brief keying | Improve signal quality and repeat with a longer controlled transmission. |
| Saved tone still does not open audio | DCS polarity, receive frequency, bandwidth, or source changed | Verify the complete analog channel and repeat with the same source. |
| Digital repeater traffic is present | CTCSS/DCS discovery is the wrong tool | Use Digital Monitor and verify DMR color code, slot, and talkgroup instead. |
| DMR-6X2 or PRO menu does not match | Those procedures are not verified | Stop and use BTECH Support rather than importing DA-7X2 instructions. |
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