Teac A-300 - Recording Performance Adjustments (Continued); Channel Separation Check

record aod, rewind fom
(4)
rewind um
(5)
erased md,
(= Erased
T-465
Fig. 6-16 Erase Efficiency Check Procedure
6-3-8.
CHANNEL
SEPARATION
Preparations:
OSCILLOSCOPE
Specification: 30 dB (min.)
NOTE: To check channel separation (cross talk between
channels), a 1 kHz narrow bandpass filter should
be used. The test signal delivered from an AF oscil-
lator should be tuned to the filter used. eae jurevr ke FRLTER
AC Voltmeter
° °
Numbers in parentheses correspond to steps in Fig. 6-18.
1. Load a TEAC MTT-506 test tape. Fig. 6-17 Connection
2. Apply a 1 kHz test tone at —9 dB (275 mV) into the
left channel. Switch Setting:
oe
4. Rewind the tape to the starting point of recording. (2) OUT TAPE
5. Play the tape and measure the output level differences
between the left and right channels .......... (3) Control Setting:
6. A 30 dB difference or more is required. OUTPUT: Specified Setting (See 6-1-2)
LINE: Specified Setting (See 6-2-2)
MIC: Minimum
record ead,
(1)
(2)
play and compare mamma
(3)
Signal (7 Blank
T-467
Fig. 6-18 Channel Separation Check Procedure
18