DMTA-10040-01EN, Rev. E, February 2018
Control Functions 113
the horizontal and vertical gains will remain constant; they will increase or
decrease at the same rate.
To adjust the horizontal gain only (H GAIN 2 without changing V GAIN 2), press
the MAIN FILTER menu key ( ) twice, followed by the D key. The knob will
then adjust only the horizontal gain. To adjust only the vertical gain (V GAIN 2),
press the E key. The knob will then adjust only the vertical gain.
To speed up the gain selection process (while the combined horizontal and vertical
gain, horizontal gain, or vertical gain function is highlighted), press once, which
enables the coarse-knob function. GAIN, H GAIN, or V GAIN will be underlined
when this function is enabled. The gain can then be changed in 1.0 dB increments. To
turn off the coarse-knob function, press one more time, which returns to gain
adjustments in 0.1 dB increments.
4.4.3 MIX Menu in Dual Frequency — MAIN FILTER Key
MIX menu
The MIX menu determines how the signal is displayed while in dual frequency.
The options are AUTO, F1+F2 (frequency 1 + frequency 2), or F1‑F2 (frequency 1 –
frequency 2).
To adjust the MIX setting, press the MAIN FILTER menu key ( ) three times,
followed by the A key. With MIX highlighted, rotate the knob until the desired
MIX is displayed:
— AUTO MIX
— H MIX GAIN
— V MIX GAIN
— MIX ANGLE
When the MIX TYPE is set to AUTO, the AUTO MIX command (B key) becomes
available. The AUTO MIX command will perform automatic mixing of the live
signals when the key is pressed. This function is particularly suited for heat
exchanger tubing inspection.
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