American Dynamics SpeedDome Ultra 8 Operator's Manual page 37

Red Light
Adjusting the Shutter Limit sets the update time used to maintain the image quality. If you
want to videotape an incident in low-light conditions, you may find that tape quality is not
acceptable. To ensure that the videotape quality is acceptable for possible prosecution
purposes, you may want to test the Shutter Limit settings under the expected lighting
conditions.
The Relationship between AGC and Open Shutter Settings
The following table shows which settings can be changed based on the current AGC/Shutter
setting.
Configuring AGC and Open Shutter Settings
1. Select Camera Functions from the Dome Configuration Menu.
2. Move the highlight to AGC/Shutter mode field. The highlight appears in the first field
(AGC/ Mode).
3. Select one of the following:
• Select AGC On to set AGC to automatic mode. This allows you to adjust the maximum
AGC gain setting (in decibels). Continue with step 4.
• Select AGC Off to set the AGC to minimum level. You cannot adjust the maximum
AGC gain or shutter limit settings. Continue with step 7.
• Select Open Shutter to enable field integration. This allows you to adjust the
maximum AGC gain and shutter limit settings. Continue with step 4.
The default setting is Open Shutter.
4. Move the highlight to Max Gain field. Change the setting. The following settings are
available:
• For 22X cameras, the setting values range from 0 to 28dB.
•
For 35X cameras, the setting values range from 10 to 32dB.
SPEEDDOME ULTRA 8 CONFIGURATION UTILITY
OPERATOR'S GUIDE
Figure 25. Mixed field integration
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250
msec
Table 5. AGC, and Open Shutter Relationships
AGC/Shutter
Setting
AGC Off
AGC On
0–28dB (NTSC)
Open Shutter 0–28dB (NTSC)
35 of 140
Red/Green Light
125
msec
Max Gain
N/A
0–29dB (PAL)
1/2–1/60 (NTSC)
0–29dB (PAL) 2/3–1/50 (PAL)
Green Light
125
msec
Limit
N/A
N/A
8200-0600-01, REV. B