Panasonic RS-612US-E - Page 7

Tape speed
Equipment:
* Test tape---C-WAT
* Digital electronic couriter or
frequency counter (RP8067)
MEASUREMENT & ADJUSTMENT
Tape speed accuracy
1. Test equipment connection is shown below.
LINE OUT
Test tape Playback mode
Fig. 9
quency counter.
3. Measure this frequency.
Tape speed accuracy = 0 x 100) %
where, f = measured value
5. Take measurement at middle section of tape.
]
Standard Value: 1.5%
Adjustment method
1. Play the test tape (middle).
quency becomes 3,000 Hz.
Tape speed fluctuation
values and calculate as follows:
Tape speed fluctuation = (Sat- x 100} %
fi =maximum value
f2 = minimum value
Standard Value: 1% |
Digital electric counter
. Play test tape (C-WAT 3,000Hz), and supply playback signal to fre-
4. On the basis of 3,000Hz, determine value by following formula:
2. Adjust the tape speed adjustment VR shown in fig. 20 so that fre-
Make measurements in same manner as above (beginning, middle arid
end of tape), and determine difference between maximum and minimum
REMARKS
* Playback mode
Wow and flutter
Equipment:
* Wow meter
* Test tape---C-WAT
1. Test equipment connection is shown below
LINE OUT
Test tape Playback mode Wow meter
Fig. 10
wow meter.
can be weighted by JIS network (WRMS).
. Measure at middle section of test tape.
r
Standard Value: 0.17% (WRMS) |
.
Use
wow
test
tape
(3,000Hz)
and
measure
its
playback
signal
on
3. Wow and flutter is expressed in percentage and that measurement
* Playback mode