7. Advanced
CAUTION: All light outputs should be measured with a white image projected on the screen.
What can be done?
This procedure is meant to calibrate the ECR dimmer: the dimmer is adjusted until it attains the best tolerance position for the Night
Vision to work properly.
How to start the ECR Calibration dialog box?
1. Press the MENU key to activate the Menu bar
2. Press the cursor key ← or → to highlight Service in the menubar
3. Push the ↓ key to pull down the Service menu
4. Push the cursor key ↑ or ↓ to highlight Dimming
5. Push the cursor key → to pull down the Dimming menu
6. Push the cursor key ↑ or ↓ to select Calibrate ECR... and press ENTER to select
Image 7-242
The ECR Calibration dialog box appears.
Image 7-243
How to perform ECR calibration?
1. Use the cursor key ← or →, the numeric keys on the RCU, or the local keypad, to set the ECR calibration
2. Set the ECR calibration to ’0’
3. Press ENTER to activate the new ECR settings
4. Project a blank white image on the screen. You can also use the internal purity pattern. Refer to section "Internal patterns", page
167 for more details on internal patterns
5. Measure the light output using a light meter
For example: LMT
6. Set the ECR to 5% from the Lamps menu. You will find the light output on the screen drops to 5%
7. Now from the Service menu, adjust the ECR calibration so that the measured light output is exactly 5%
While adjusting the ECR calibration,
- if you increase the value, the ECR dimmer ope
ns and the light output increases
- if you decrease the value, the ECR dimmer closes and the light output decreases
8. Continue to adjust the value until the light output on the screen drops to 5%
R59770324 SIM 5W 22/12/2011
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