SONOTRAX(2009) Series Ultrasonic Pocket Doppler User Manual
35
switch on the Doppler.
If the probe is not connected or poorly
connected, the LCD displays a flashing “---
MHz” sign. You should reconnect the probe
properly.
When the probe is well connected, the LCD
stops flashing and shows the probe frequency
in the bottom right corner.
3.5 Selecting Working Mode
The Doppler has four working modes. They
are:
Mode 1: Real-time FHR Display Mode
Mode 2: Averaged FHR Display Mode
Mode 3: Manual Counting Mode
Mode 4: Backlight Brightness Setting
Mode
Press the button on the left panel, the
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