Dolby Laboratories CP65 - Manual (Page 62)

Action Indication Step
No.
5-46
B-Chain Alignment Procedures
NORMAL BYPASS
bypass
(switch behind panel)
g. Adjustment of Bypass Gain
6
7
5
Dolby
15V
15V
24V
gain
bypass
status supply
power
Cat. No.
249
O FF 80 7 0 6 0 50 40 3 0
xx dBC
-3 dB
yy dBC
FROM 4
➝
B-Chain Alignment Procedures
Notes
5-47
g. Adjustment of Bypass Gain
Place the NORMAL/BYPASS switch in the BYPASS position.
Adjust the bypass gain control on the Cat. No. 249 Power Supply card for a SPL 3 dB less
than you noted in the NORMAL mode at Step 4. If this level cannot be achieved via the
control, disconnect the CP65 from AC power, remove the Cat. No. 249 card, switch the
J1 jumper from the Low to the Hi position, reinstall the Cat. No. 249 card, reconnect AC
power to the CP65, and readjust the SPL to the required level.
CAT. NO. 249
Low
High
At this point, you can disconnect all external equipment from the CP65. The remainder
of the alignment procedure does not require measuring instruments.
J1