Adjusting the Pulser Receiver
Part # 910-250C
31
4 Adjusting the Pulser Receiver
This chapter describes how to adjust the pulser receiver.
Topics are as follows:
• Adjusting System Sensitivity
• Using AUTO-80%
• Setting Gain Reference Level and Adding Scanning Gain
• Using the Pulser Key
4.1 Adjusting System Sensitivity
To adjust the instrument sensitivity, follow these steps:
1. Press [GAIN].
2. Use the function keys to select preset values for course adjustment.
3. Move the gain upward or downward with the [] and [] keys for fine adjustments.
The current system sensitivity is displayed and highlighted in the upper left corner.
4. Adjust gain in 0.1 dB increments by pressing the [] or [] key.
5. Hold the [] or [] key to gradually increase the slewing rate. Total system sensitivity
is 110.0 dB.
4.2 Using AUTO-80%
AUTO-80% quickly adjusts the gain (dB) setting, bringing the peak of a reference echo to
80% full screen height. AUTO-80% is especially useful with general welding
applications and codes that require quick gain adjustments to bring an echo to 80% screen
height.
You can use AUTO-80% to bring an echo to 80% full screen height in either Gate 1 or
Gate 2.
To use Auto-80% with Gate 1, follow these steps:
1. Press [GATE 1].
2. Use the green slewing keys to position the gate over the desired echo. Be sure the echo
breaks the gate threshold.
3. Press [F5]. The peak of the highest amplitude echo breaking the Gate 1 threshold is
brought to 80% screen height.
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