Add examples of log output

docs/en/source/camera_devices/8_FAQ/FAQ.md

@@ -29,7 +29,7 @@ If the camera node crashes unexpectedly, it will generate a crash log in the cur
 
 **1. SDK debug logs**
 
-Set the launch parameter `log_level` to `debug`. After running, the SDK will generate log files in the `Log/` folder under the current project directory. If you want a more recognizable file name for this test, you can set the parameter `log_file_name`.
+Set the launch parameter `log_level` to `debug`. After running, the SDK will generate log files in the `Log/` folder under the current working directory. If you want a more recognizable file name for this test, you can set the parameter `log_file_name`.
 
 - SDK logs are appended to the same file: multiple launches will continue writing into the same log file.
 - Recommendation: before packaging logs to send to technical support, delete old log files, then reproduce the issue and collect new logs. This keeps the logs cleaner and makes troubleshooting more accurate.
@@ -41,6 +41,20 @@ In the launch file, set the node (or composable node container) parameter `outpu
 - After setting `output="log"`, ROS 2 logs will be stored in the `~/.ros/log/` directory.
 - When submitting an issue, please package both the SDK logs under the `Log/` directory and the corresponding ROS 2 logs under `~/.ros/log/` for the same time period.
 
+**3. Example Tutorial**
+
+Run in the terminal
+```
+ros2 launch orbbec_camera gemini_330_series.launch.py log_level:=debug
+```
+![alt text](../../../../zh/source/camera_devices/image/image-2.png)
+
+You can find the SDK logs in the Log folder within the current working directory.
+![alt text](../../../../zh/source/camera_devices/image/image-1.png)
+
+ros2 log is enabled by default and can be viewed under `~/.ros/log/`
+![alt text](../../../../zh/source/camera_devices/image/image.png)
+
 ### Why Are There So Many Launch Files?
 
 - Different cameras have varying default resolutions and image formats.

docs/zh/source/camera_devices/8_FAQ/FAQ.md

@@ -29,7 +29,7 @@
 
 **1. SDK debug 日志**
 
-将 launch 参数 `log_level` 设为 `debug` 运行后，会在当前工程目录下的 `Log/` 文件夹中生成 SDK 日志文件。如果需要为本次测试指定一个更易识别的日志文件名，可以修改参数 `log_file_name`。
+将 launch 参数 `log_level` 设为 `debug` 运行后，会在当前工作目录下的 `Log/` 文件夹中生成 SDK 日志文件。如果需要为本次测试指定一个更易识别的日志文件名，可以修改参数 `log_file_name`。
 
 - SDK 日志是追加写入的：多次启动会在同一个文件里不断累积日志。
 - 建议：在准备打包日志发给技术支持前，先删除旧的日志文件，然后重新复现问题并采集新的日志，这样日志更干净、定位更准确。
@@ -41,6 +41,20 @@
 - 设置为 `output="log"` 后，ROS2 日志将保存在 `~/.ros/log/` 目录下。
 - 如需提交问题，请同时打包 `Log/` 目录下的 SDK 日志和 `~/.ros/log/` 下对应时间的 ROS2 日志，一并提供。
 
+**3. 示例**
+
+在终端运行
+```
+ros2 launch orbbec_camera gemini_330_series.launch.py log_level:=debug
+```
+![alt text](../image/image-2.png)
+
+即可在当前工作目录下的 Log 文件夹下查看 SDK 日志
+![alt text](../image/image-1.png)
+
+ros2 log 默认开启，可在 `~/.ros/log/` 下查看
+![alt text](../image/image.png)
+
 ### 为什么有这么多启动文件？
 
 - 不同的相机具有不同的默认分辨率和图像格式。