Teac A-650 - Audio Track Performance; Adjacent Track Crosstalk Measurement

Preparations:
Specification: 40 dB (minimum)
AMP
SPKR
Numbers in parentheses correspond to steps in Fig. 6-23.
LW U ’ :
Connection
Fig. 6-22
Switch Setting.
BIAS
EQ
LIMITER
DOLBY NR
1 1
OUT
OUT OUT
6.
(2)
(3)
Side 1
(4)
Side 2
h? i Signal Blank
T-466
Fig. 6-23 Adjacent Track Crosstalk Measurement Procedure
32
4.
5.
6-4-11. ADJACENT TRACK CROSSTALK
MEASUREMENT
1.
2.
3.
Connection:
OSCILLATOR
7.
8.
NOTE
The tape must be completely erased prior to this pro 
cedure. Preferably use bulk erased tape.
LINE:
MIC:
DECK
under TEST
VTVM
o o
Control Setting:
OUTPUT: Specified Setting (See 6-2-2)
Specified Setting (See 6-3-2)
Minimum Setting
Load a TEAC MTT-5O5B test tape.
Apply a 100 Hz test signal at — 9 dB (274 mV).
Place the deck in the record mode for about 30
seconds .......................................................................... (1)
Rewind the tape to the starting point of recording. (2)
Play tire tape and measure the output level of the
recorded portion. Note this reading for temporary ref 
erence level for the following measurements ........... (3)
Remove the test tape, turn it over and replace it in the
deck ............................................................................... (4)
Play the tape back and read the output level .......... (5)
Get the differences between this reading and the
reading previously measured for the 100 Hz signal.
OSCILLOSCOPE
Oi
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