Operator`s manual

Model VR240 Audio Logging Recorder
4-6
January 2000
Section II. THE VR240 CHANNEL HOUR CAPACITY
4-12. THE “CHANNEL HOUR”.
The VR240’s capacity is measured in channel-hours: the number of hours of a single channel
that can be recorded on one tape (see Table 4-1). That number, for a 120 meter DDS-2
cassette, is about 520 hours, or some 21 days. Of course, if you record more than one channel
at a time, the tape will fill faster.
For example: You are recording your broadcast station 24 hours a day. You also are recording
two additional morning shows 4 hours per day each. How long will the tape last? 24 plus 4 plus
4 equals 32 channel hours every day. You are entitled to 520 channel hours per tape, which
comes out to 16.25 days.
In this example, you will need to change the tape every 16.25 days. As a matter of
convenience, you would probably want to change it at the same time every 16 days or perhaps
every 2 weeks, ignoring the trivial waste involved. Recording more sources adds to the
channel-hour load, and you might find a tape lasting from a few days to more than two weeks.
Table 4-1. Eventide Logging Recorder
Channel Hours* of Storage Chart
VR320, VR240, VR204 VR208HF, VR204HF
toll
toll commentator rebroadcast
FREQUENCY RESPONSE 3.4kHz 3.5kHz 7kHz 14.4kHz
sample rate 8kHz 8kHz 16kHz 32kHz
data compression 16kbps 32kbps 64kbps 32kbps 64kbps 128kbps
ARCHIVE MEDIA audio storage hours audio storage hours
DDS-2 tape
- 120M, 4GB
537 268 134 260 130 65
DDS-3 tape
- 125M, 12GB
1600 800 400 780 390 195
DVD-RAM
⊥
-
5.2GB, re-writeable
686 343 171 335 167 83
Magneto-optical
⊥
- 5.2GB,
5.25"
712 356 178 348 174 87
INTERNAL HARD DISK audio storage hours audio storage hours
4GB hard disk
(standard)
540 270 135 260 130 65
9GB hard disk
(optional)
1230 615 307 600 300 150
18GB hard disk
(optional)
2460 1230 615 1200 600 300
one day = 24 hours, one week = 168 hours, one month = 672 hours