Specifications

3-7
Cat. No. 682 Analog Output Card
Figure 3 - 6.
Cat. No. 682.
Crossover Select Jumpers [NO]
J3 Left Channel
J4 Center Channel
J5 Right Channel
J901 Bypass Audio Channel
These jumpers route the designated signals through an optional Cat. No. 683
crossover card. If the Cat. No. 683 card is installed, these jumpers should be
set to the “YES” position. If the optional Cat. No. 683 is not present, these
jumpers should be set to the “NO” position. The jumpers are set to the “NO”
position at the factory.
NOTE
:
If bypass audio is routed to the optional Cat. No. 683 crossover card, the bypass portion of the
crossover circuitry must be functioning in order to produce a bypass audio output.
J900 Bypass Calibration
This jumper inserts a calibrated pink noise signal into the bypass system for
level and (optional) crossover adjustments. The calibration signal is enabled
when the jumper is in the “BCAL” position and is disabled otherwise.
NOTE
: It is important to move the jumper to the disabled position after calibration is complete so that
the bypass signal path remains completely isolated from any possible erroneous signals in the signal
path.
J902 Bypass Channel Output Level Select [LO]
This jumper, along with the bypass gain adjustment potentiometer (RV901),
adjusts the level of the bypass channel. The jumper provides a “coarse” gain
setting and the potentiometer provides a “fine” gain adjustment. The “HI”
jumper position can be used to produce a higher output level range on the
bypass channel. This jumper is factory set to the “LO” position.
NOTE
:
If Cat. No. 683 Crossover card is installed, the preferred setting for this jumper is HI.
J2 L and R Surround High-Pass Filter Frequency Select [50Hz]
This header sets filter circuits to the indicated high-pass frequency. Signals
below this frequency are attenuated in order to prevent distortion or damage to
surround speakers that are unable to handle extreme low frequency energy.
NOTE
:
The function of the Bypass Output Level control changes to Bypass Low Frequency
Balance Control if a Cat No. 683 Crossover Card is installed.