Akai GX-65 MKII

Operation details —
Bias adjustment
Cassette tapes can be separated widely into 3 types: Normal
position, Chrome (CrOz) position and Metal position.
Recording characteristics vary slightly, even with tapes that
have the same position. For good recording results, precise
adjustment of the tape’s bias is necessary.
This cassette deck is equipped with a BIAS control which is ca-
pable of adjusting the recording bias current from a range of
-20 %to +20 % of the proper bias current for each tape position. —
CLOSED LOOP DOUBLE CAPSTAN
Operation
For bias adjustment, FM inter-sation noise is used as a test
signal.
4 Set your tuner to a point between FM stations.
5
Record the FM inter-station noise at a level of approxi-
mately —20dB. .
During recording, repeatedly press the MONITOR but-
ton to switch between the source sound and the re-
corded sound. |
If the recorded sound has a pronounced higher hiss in
comparison to the source sound, recording bias is set
too low.
If the recorded sound has a lower hiss in comparison to
the sound source, recording bias is set too high.
If both the recorded and source sound are the same,
the recording bias is set to the proper level
4 Adjust the BIAS control as follows:
To increase recording bias ................ ee ceeeeseeeeeeeeesenentees
Turn the control toward +.
To decrease recording bias......... sedacadeysanaubessiveesdsceceeeses
Turn the control toward —.
Record the inter-station noise again and use the MONI-
TOR button to re-check the sound difference.
After recording bias adjustment is completed
Set the cassette deck to the normal recording mode.
Note 7
e Avoid setting the BIAS control to the maximum + or —
positions, since the frequency characteristics of the tape
will change sharply.
@ Normally set the BIAS control to “0” when using one of
the standard reference tapes listed (Refer to page 18).
@ Do not turn the BIAS control during normal recording or
once bias adjustment has been completed.
@ The BIAS control is not effective during playback.