Dolby
®
Model CP650 Installation Manual
7-1
Bypass Level Adjust
Press OK to
enter bypass.
Chapter 7
Final
Adjustments
7.1
Setting Bypass Level
With a Cat. No. 791 Crossover Card installed, two jumpers, located on the
Cat. No. 772A card, must be set to “Yes”. This enables the Cat. No. 791 card bypass
output and sends a full-range signal to the hearing-impaired output. CP650s shipped
with a Cat. No. 791 card have the correct jumper settings. See Figure 4–2 .
1 2 3
7
4 5 6
8
DIP switch 6 up
Ensure that DIP switch 6 is in the “up” position
Press the left menu to move the Bypass Level
Adjust menu (or press and hold while rotating the
front-panel knob).
Press the OK button, switching the CP650 to
bypass operation. The main power button will
illuminate, confirming that the unit is in bypass.
Thread and play a loop of Cat. No. 69P pink-noise
test film.
OK
+
OK
Normal Bypass
Mic Bypass
Video Clamp RTA1 RTA2
1 2 3
7
4 5 6
8
SIGNAL
PRESENT
MAIN
HF
Lt
Rt
Lt
Rt
Sw
L
C
R
Ls
Rs
SERIAL DATA
MIC MUX
Using the OK button, toggle back and forth
between normal and bypass operation, while
setting the
MAIN
bypass level trimpot (located
through the access hole on the setup panel).
Adjust the pot until the audio level in the
auditorium sounds the same for normal and
bypass.
