Connecting Storage Devices - Dedicated Micros Digital Sprite 2 Setup Manual

485-Bus/DTMF telemetry
Dedicated Micros telemetry receivers can be controlled using 485-Bus or DTMF
(telephone tones). When using 485-Bus telemetry the receiver is connected
directly to the 485-Bus connectors on the back of the unit. When using DTMF
telemetry a telemetry adaptor (TAD3) is required to convert the telemetry
commands into DTMF tones. DTMF and 485-Bus telemetry can be configured in a
star or delta configuration.

Connecting storage devices

Images are recorded to the internal hard disk for instant playback and searching
by the operator. The capacity of the internal disk affects the amount of images
and time that can be recorded. For example, a 80GB Digital Sprite 2 can record
for 8 days at default record rates, but a 320GB Digital Sprite 2 can record for 31
days at the same record rates.
The internal hard disk is a temporary storage device as the images are constantly
being overwritten after a certain period of time. If images need to be kept for
longer then external storage is required. The 50-way high density SCSI-2 port on
the rear of the Digital Sprite 2 is used to connect to external storage devices.
There are three types of external storage devices which can be used:
1. RAID – Redundant Array of Independent Disks
RAID units contain hard disks which adds to the internal storage, effectively
extending the amount of images which can be recorded before being overwritten.
RAID units give protection if a fault occurs. If a disk fails in a RAID the images will
continue to record to another disk in the array. RAID also allows faulty disks to be
hot-swapped – replaced whilst the RAID is powered.
2. External CD Writer.
Images can be copied from the internal hard disk onto an external SCSI CD writer.
All images are digitally signed for authentication purposes before being
transferred to CD. The contents of the entire CD are also digitally signed. A small
CD playback program is also recorded to allow these images to be played back on
a third party PC without having to install any extra software.
Compatible CD writers at the time of writing include:
Yamaha CRW 2200 SX – VK
Yamaha CRW 3200 SX – VK
Plextor Plexwriter PX-W1210-TSE
The table below shows the record time on CD for typical record rates.
1PPS 2PPS
CD-R 640MB 9h 46m 4h 49m
Note: You may need to purchase a SCSI cable to attach the CD writer to the Digital
Sprite 2. The connection on the Digital Sprite 2 is a 50-pin HD SCSI-2.
3PPS 6PPS 12PPS 25PPS
3h 12m 1h 36m 48m 23m
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