GE Krautkramer USM 35X - DACMOD (Activating DAC;TCG)

5-62 Issue 01, 04/2005 Krautkramer USM 35X
Operation
H Note:
Double assignment of the function T-CORR/OFFSET.
Toggle between the two functions by repeatedly press-
ing the corresponding key
.
DACMOD (Activating DAC/TCG)
You can use this function to activate the DAC. The fol-
lowing settings are available:
• off
No DAC is active.
•DAC
The already saved distance-amplitude curve is
displayed on the screen, or a new DAC is recorded.
• TCG
An existing DAC (at least 2 reference points) is
displayed as a horizontal TCG line.
H Note:
No reference echoes can be recorded with
DACMODE = TCG. TCG can only be activated if the
reference echoes recorded are situated within a dynam-
ic range of 40 dB. Otherwise an error message is out-
put. If the TCG setting should be nevertheless be used
in this case, then the DAC must be reduced (by delet-
ing the last reference points) until TCG can be switched
on.
– Select the function DACMOD.
– Use the right-hand rotary knob to select the DAC
setting.
If there is a DAC stored, it will now be active.
– Select the TCG setting.
The TCG function is activated so that the DAC
becomes a horizontal recording threshold. This
means: all reference echoes recorded are brought
(lifted or lowered) to the same echo height.
– Use the right-hand rotary knob to select the setting
off in order to deactivate the DAC again.
Distance-amplitude curve (only USM 35X DAC and USM 35S)
5-62 Issue 01, 04/2005 Krautkramer USM 35X
Operation
H Note:
Double assignment of the function T-CORR/OFFSET.
Toggle between the two functions by repeatedly press-
ing the corresponding key
.
DACMOD (Activating DAC/TCG)
You can use this function to activate the DAC. The fol-
lowing settings are available:
• off
No DAC is active.
•DAC
The already saved distance-amplitude curve is
displayed on the screen, or a new DAC is recorded.
• TCG
An existing DAC (at least 2 reference points) is
displayed as a horizontal TCG line.
H Note:
No reference echoes can be recorded with
DACMODE = TCG. TCG can only be activated if the
reference echoes recorded are situated within a dynam-
ic range of 40 dB. Otherwise an error message is out-
put. If the TCG setting should be nevertheless be used
in this case, then the DAC must be reduced (by delet-
ing the last reference points) until TCG can be switched
on.
– Select the function DACMOD.
– Use the right-hand rotary knob to select the DAC
setting.
If there is a DAC stored, it will now be active.
– Select the TCG setting.
The TCG function is activated so that the DAC
becomes a horizontal recording threshold. This
means: all reference echoes recorded are brought
(lifted or lowered) to the same echo height.
– Use the right-hand rotary knob to select the setting
off in order to deactivate the DAC again.
Distance-amplitude curve (only USM 35X DAC and USM 35S)