Differences

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--- icom-vs-3-bluetooth-headset-review [2024/01/27 17:30] – ok1hra
+++ icom-vs-3-bluetooth-headset-review [2024/01/28 18:23] (current) – [Conclusion] ok1hra
@@ Line 1: / Line 1: @@
 ====== Icom VS-3 Bluetooth headset review ======
 {{https://remoteqth.com/img/wiki-VS-3.jpg?400}}
+----
 ===== CW operation =====
-  * The signal is **delayed by 30ms,** so it is **not possible to keying CW from the local paddle.** Na osciloskopu vidime zlute originalni CW tecky o rychlosti 28 WPM a na modrem prubehu audio zpozdene pres Bluetooth modul VS-3. \\ {{https://remoteqth.com/img/wiki-IC-705_30ms_delay_at_28WPM_dots.png?400}}
+  * The signal is **delayed by 30ms,** so it is **not possible to keying CW from the local paddle.** On the oscilloscope we see the yellow original CW dots at a speed of 28 WPM and on the blue waveform the audio is delayed via the VS-3 Bluetooth module. \\ {{https://remoteqth.com/img/wiki-IC-705_30ms_delay_at_28WPM_dots.png?400}}
   * The telegraph **signal rings/rattles unpleasantly in high tones. Audio is at the limit of applicability.** It would probably be enough to add a simple low pass filter. The emphasis on high tones can be seen on the next sweep measurement in SSB mode.
 ===== SSB operation =====
   * Signal delay in SSB mode does not matter. **The audio accentuates the higher notes, but it's not annoying.** On the image from the oscilloscope we see a yellow signal representing the original audio from the headphone output, which slightly suppresses the higher tones. The blue waveform shows the audio from the Icom VS-3 Bluetooth module, which significantly emphasizes high notes and adds noise. \\ {{https://remoteqth.com/img/wiki-IC-705_1s_sweep_6kHz.png?400}}
+  * It is a one-second chirp with a 6kHz lift.
 ===== PTT =====
   * The **PTT** button is **very practical and works flawlessly.**
+----
+===== Conclusion =====
+  * The latency of the audio signal delay is a property, it is not a device error.
+  * Suppression of high frequencies would probably improve the useful properties of the device, which are good except for the CW mode.