User`s manual

DigiMux
Overview 5
About Image Quality
The quality of an image depends on the compression used on the image when it is
stored on your hard drive. Higher compression results in a smaller image file, but the
quality of the image is not as good as an image stored with lower compression.
The image quality on a DigiMux is controlled automatically when you select one of
the preset recording rates. Selections include Basic, Standard, Medium, High, and
Superior recording quality, from lowest quality image to the highest. (See
Recording
Quality on page 51 for details about these settings). The higher the quality, the larger
the image file, and the more drive space required for storage. Higher quality
recording also results in a lower recording time. Your selection should balance image
quality, recording rate, and available drive space.
About Hard Disk Capacity
The number of images that can be recorded on a DigiMux depends on the capacity of
the hard drive(s) in the unit. The DigiMux is available in 80 GB, 160 GB, or 320 GB
capacity. The 320 GB capacity can be supplied by two 160 GB hard drives.
The larger disk drive enables you to increase the image quality, recording rate,
and/or recording time.
In general, recording at “Standard” and 30 ips NTSC (or 25 ips PAL) uses roughly
28
GB of storage per day, which means that a 160 GB hard drive can record images for
approximately 5 days. This figure can vary, depending on environmental conditions.
For example, a high-traffic environment may cause more information to be recorded.