What are the frequency and period for the waveform shown below? The time scale i

Question

What are the frequency and period for the waveform shown below? The time scale is 500 ns/div.

The following screen represents a screen shot of an Oscilloscope screen with 8 divisions on the vertical axis and 10 divisions on the horizontal axis.  It is a grey background with dark grey grid lines and a RED square-wave signal.  Around the viewable area, a black border displays the settings.  The signal is displayed on channel 1, so all of the following settings apply to Channel 1.  
Settings:
DC Offset of 0 volts
2 volts/division on the vertical axis
Timebase 500 nanoseconds/division on the horizontal axis
Positive triggering indicated
Left to right are as follows the timebase division:
Division 0  to 1:                  0 Divisions (sits on the center axis)
Division 1 to 5:                   2.5 Divisions high
Division 5 to 9:                   0 Divisions (sits on the center axis)
Division 9 to 10:                 2.5 Divisions high
The bottom left hand corner of the display shows two green softkey values marked as follows:
Left softkey Value is MODE/AUTOLEVEL
Right Softkey Value is HOLDOFF 60 nanoseconds

Press the ESC key to close the image description and return to lecture

What are the frequency and period for the waveform shown below? The time scale is 500 ns/div. The following screen represents a screen shot of an Oscilloscope screen with 8 divisions on the vertical axis and 10 divisions on the horizontal axis. It is a grey background with dark grey grid lines and a RED square - wave signal. Around the viewable area, a black border displays the settings. The signal is displayed on channel 1, so all of the following settings apply to Channel 1. Settings: DC Offset of 0 volts 2 volts/division on the vertical axis Timebase 500 nanoseconds/division on the horizontal axis Positive triggering indicated Left to right are as follows the timebase division: Division 0 to 1: 0 Divisions (sits on the center axis) Division 1 to 5: 2.5 Divisions high Division 5 to 9: 0 Divisions (sits on the center axis) Division 9 to 10: 2.5 Divisions high The bottom left hand corner of the display shows two green softkey values marked as follows: Left softkey Value is MODE/AUTOLEVEL Right Softkey Value is HOLDOFF 60 nanoseconds Press the ESC key to close the image description and return to lecture

Explanation / Answer

1 division = 500ns

Period of waveform = 8 divisions = 4000ns = 4us

Frequency of waveform = 1/period = 1/(4us) = 0.25Mhz = 250Khz

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