910-269-EN, Rev. B, June 2011
210 Chapter 11
surface can often cause signal loss after calibrating a DAC curve, which results in
inaccurate comparisons of the test reflectors with the calibrated DAC curve. The
EPOCH 1000 Series can be easily adjusted for this potential difference by adding
transfer correction to the calibrated base gain after completing the DAC curve setup.
To add transfer correction to a completed DAC curve
1.
Choose
1/5 > Basic
.
2.
Press
[GAIN]
.
3.
Use the
[UP]
and
[DOWN]
arrow keys or the adjustment knob to bring the
scanning gain to the desired level for transfer correction.
4.
Once the desired scanning gain is displayed, choose
1/5 > Basic > Add
to add the
scanning gain to the base gain and to apply the transfer correction.
11.2.5
JIS DAC
The Japanese Industrial Standard (JIS) DAC mode meets the requirements of JIS
Z3060. The JIS DAC curve setup is identical to the standard DAC/TVG setup.
However, there are some minor functionality differences when compared to other
DAC/TVG modes:
•
Only the main DAC curve is viewable in TVG mode
•
Any of the six curves can be used to trip the alarm when in the JIS DAC mode.
Additionally, you can set the alarm to positive or negative. To select the curve to
be used as the alarm reference level, first activate JIS DAC and then choose
6/6 >
TVG > Next DAC
. The selected curve appears as a double thickness line. Once a
curve has been selected, an alarm can be activated and set to be either a positive or
a negative threshold detection.
11.2.6
Custom DAC Curves
The DAC/TVG software option for the EPOCH 1000 Series features a customizable
DAC curve setup that allows you to define up to six additional reference curves from
the primary curve at varying levels from –24 dB to +24 dB. The Custom DAC Curves
option is ideal for unique sizing inspections and procedure development. The Custom
DAC Curve function also allows the option of either a straight-line connection or a
curved, polynomial connection of each point of the DAC curve to meet various
international or customer-specific requirements.
Downloaded from
Содержание EPOCH 1000 Series
Страница 12: ...910 269 EN Rev B June 2011 xii List of Abbreviations Downloaded from ManualsNet com search engine ...
Страница 30: ...910 269 EN Rev B June 2011 18 Preface Downloaded from ManualsNet com search engine ...
Страница 50: ...910 269 EN Rev B June 2011 38 Chapter 1 Downloaded from ManualsNet com search engine ...
Страница 60: ...910 269 EN Rev B June 2011 48 Chapter 2 Downloaded from ManualsNet com search engine ...
Страница 100: ...910 269 EN Rev B June 2011 88 Chapter 3 Downloaded from ManualsNet com search engine ...
Страница 186: ...910 269 EN Rev B June 2011 174 Chapter 9 Downloaded from ManualsNet com search engine ...
Страница 206: ...910 269 EN Rev B June 2011 194 Chapter 10 Downloaded from ManualsNet com search engine ...
Страница 258: ...910 269 EN Rev B June 2011 246 Chapter 12 Downloaded from ManualsNet com search engine ...
Страница 280: ...910 269 EN Rev B June 2011 268 Chapter 14 Downloaded from ManualsNet com search engine ...
Страница 286: ...910 269 EN Rev B June 2011 274 Chapter 16 Downloaded from ManualsNet com search engine ...
Страница 318: ...910 269 EN Rev B June 2011 306 Chapter 17 Downloaded from ManualsNet com search engine ...
Страница 322: ...910 269 EN Rev B June 2011 310 Chapter 18 Downloaded from ManualsNet com search engine ...
Страница 332: ...910 269 EN Rev B June 2011 320 Chapter 19 Downloaded from ManualsNet com search engine ...
Страница 350: ...910 269 EN Rev B June 2011 338 List of Figures Downloaded from ManualsNet com search engine ...