phase_3x_90_separate.jpg
The user wants a detailed description of an image containing three stacked line graphs.
I need to describe:
1.  **Overall Layout:** Three distinct plots arranged vertically.
2.  **Axes:** X-axis is "Time (Arbitrary)" ranging from roughly -0.5 to 9. Y-axis is "Amplitude (Arbitrary)" ranging from -2 to 2 for each plot.
3.  **Plot 1 (Top):** A red sine wave labeled "base". It has a lower frequency. Peaks around y=1, troughs around y=-1. One full cycle roughly spans the width, maybe slightly more than one cycle visible (starts low, goes up, down, up, down). Wait, let's look closer.
    *   Starts at x=0, y is negative (around -0.5).
    *   Goes up to a peak at x approx 2.5, y=1.
    *   Crosses zero around x=3.75.
    *   Trough at x approx 6.25, y=-1.
    *   Back up near zero at the end. It looks like roughly 1.5 cycles or so? No, let's count peaks. One peak visible clearly. Another starts forming. Actually, looking at the grid lines:
        *   Grid lines are every 0.5 units on X (implied by labels 0.0, 2.5, 5.0, 7.5). Wait, the labels are 0.0, 2.5, 5.0, 7.5. That's a huge jump. Let's re-evaluate the scale.
        *   The major grid lines seem to be at intervals of roughly 1 unit? No, let's look at the spacing. 0.0 to 2.5 is one block. So each major vertical grid line is 2.5 units apart? No, that doesn't make sense with the wave shape.
        *   Let's count grid squares. Between 0.0 and 2.5 there are 5 subdivisions. So each subdivision is 0.5 units.
        *   Top graph: Starts at x=0, y=-0.5 (approx). Peak at x=1.5? No, let's look at the peak alignment. The peak aligns with the first major vertical grid line after 0. Wait, the labels are 0.0, 2.5, 5.0, 7.5.
        *   Let's count the intervals between 0.0 and 2.5. There are 5 blocks. So each block is 0.5 units wide.
        *   Top graph (Red): Starts at x=0, y=-0.5. Crosses zero around x=1. Peak at x=2? No, peak is at x=2 roughly. Wait, let's look at the grid again.
        *   Actually, looking at the labels 0.0, 2.5, 5.0, 7.5... The distance between them is divided into 5 sections. So each section is 0.5 units.
        *   Top graph: Starts x=0, y=-0.5. Crosses zero at x=1. Peak at x=2 (y=1). Crosses zero at x=3. Trough at x=4 (y=-1). Crosses zero at x=5. Peak at x=6 (y=1). Crosses zero at x=7. Ends near y=-0.5 at x=8?
        *   Let's re-examine the top graph carefully.
            *   Starts at x=0, y is roughly -0.5.
            *   Crosses y=0 at x=1.
            *   Peak at x=2 (y=1).
            *   Crosses y=0 at x=3.
            *   Trough at x=4 (y=-1).
            *   Crosses y=0 at x=5.
            *   Peak at x=6 (y=1).
            *   Crosses y=0 at x=7.
            *   Ends at x=8, y is roughly -0.5.
            *   Wait, the label "base" is on the right. The graph seems to show about 2 full cycles? No. From peak (x=2) to next peak (x=6) is a period of 4 units. So frequency is lower.

    *   Middle graph (Green): Labeled "freq_3x".
        *   Starts at x=0, y=0.
        *   Trough at x=0.5? No, looks like it starts going down.
        *   Let's trace: Starts x
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