Manual-4
DOC 110958
4. Next, set up the six OUTPUTS. First, determine the num-
ber of zones served and the signals to be sent to each. Using
a drawing like the example application diagram in the Data
Sheet is helpful. For ease of wiring, make Outputs serving a
common zone adjacent. Select Full-range, High-pass or Low-
pass as required for each output. e following are possible
zone congurations:
• Full-range only for medium size bookshelf speakers.
• High-pass only for small distributed ceiling speakers.
• Full-range output combined with Low-pass Output to en-
hance bass response.
• High-pass output combined with Low-pass Output for true
bi-amp operation.
5. e ±12 dB OUTPUT trims set Output levels, with relative
levels between Full-range, High-pass and Low-pass. Note: the
Output trims do not affect Low-pass loudness compensation or
Priority Input level. e idea is to set system levels for proper
operation at the maximum required SPL (with Remote Level
controls set for unity gain). Remote Level controls then at-
tenuate the level as required.
Automatic loudness compensation is achieved by alter-
ing the gain control law of any Remote port associated with
a Low-pass Output. A Low-pass Output is always used in
conjunction with a high-pass or full-range Output. Because
the Remote Level control turns the low-pass Output down
at a lesser rate than the high-pass or full-range Output, bass
response is enhanced. e corner frequency for loudness com-
pensation is set by the CROSSOVER frequency selection. e
reference level for the room is set with the OUTPUT trim
on the front panel. Any Remote Level gain change results in
automatic loudness compensation.
6. A port for a wired Remote Level control is provided for each
Output. Note: Remote Level controls do not affect the level of the
Priority Input. Each port provides a 5 volt reference voltage
(REF), a control voltage input (Vc) and a ground reference.
e gain control law for Vc is 50 mV/dB. Using the optional
VR 1 Remote control provides an audio taper response from
0 dB to > -80 dB. To control more than one Remote Port with
a single Remote control, it is only necessary to connect the Vc pin
of each additional port. An external ground referenced control
voltage with a range of 0 to 5 volts may be used with the
Remote ports. If the ratiometric output of a linear potentiom-
eter is used, (GND to CW, Vc to center tap, REF to CCW),
a linear log response results. Audio taper response requires a
potentiometer with a reverse log taper. Audio taper response is
achievable using a linear potentiometer by connecting a resis-
tor equal to 1/10th the value of the potentiometer between
GND and Vc as shown below:
Variations in wire type do not greatly aect the performance
of the Remote controls. However, 22-gauge stranded wire
with a exible jacket is recommended. You may use 3-con-
ductor unshielded remote control signal cable for shorter
runs (less than 100 feet [30 meters]). For longer runs, we
recommend using shielded cable. e type of wire required
is inuenced by your installation and local electrical codes.
Rane Corporation does not provide cable— please contact
your local retail or wholesale outlet.
7. e balanced PRIORITY INPUT operates at line or mic level,
determined by the MIC / LINE switch, on the rear panel
next to the PRIORITY INPUT jack. See Rear Panel (1) for
unbalanced connection rules. Note: the Priority Input is not
influenced by the AGC, Crossover, Output trims or Remote Level
controls. e gain range for MIC level Input is 30 to 60 dB.
e gain range for LINE level Input is 0 to 30 dB. Set the
PRIORITY GAIN to prevent overloading the Input — if the
Priority Gain OL illuminates, turn down the GAIN.
8. e PRIORITY DETECT threshold is calibrated in dBu,
and monitors the signal after the input preamp. Any change
in PRIORITY GAIN setting aects the DETECT sensitiv-
ity. Set the GAIN, then set DETECT. e range of operation
is +4 dBu to ON. e consequence of setting DETECT too
low is premature triggering due to background noise. Setting
DETECT too high results in excess delay and a sudden large
step in amplitude (perceived as a “pop”). If a paging mic is
used in an environment with a lot of background noise, we
recommend a push-to-talk device.
e release time is fixed at about 6 seconds. e release delay
is based on the typical time required to accommodate a pause
in speech or dead-time between music programs.
9. e PRIORITY DUCKER depth sets the amount of at-
tenuation applied to the LINE INPUT signal when the
PRIORITY INPUT is activated by the DETECT threshold.
DUCKER depth is continuously adjustable over a range of 0
dB to -80 dB. For equal mixing of PRIORITY and LINE, set
the DUCKER to 0 dB. For PRIORITY replaces LINE opera-
tion, use –80 dB. A value of –12 dB (2 o’clock) is typical for
PRIORITY (page) talks over LINE (music) operation.
10. e state of the PRIORITY ASSIGN port determines Prior-
ity Input assignment to each of the six Outputs. Assignment
pins are active low with passive internal pull-up. Any combi-
nation of pins may be active at one time. e select ALL pin
is provided for convenience. To complete an assignment, the
Output must be selected by the PRIORITY ASSIGN port
and Priority Detect must be active. Note that if a combination
of Crossover Outputs is used in one zone, all Outputs serving the
zone must be selected by the PRIORITY ASSIGN port. e type
of wire recommended is similar to the description in Step 6
above.
Setup & Operation…continued from page Manual-1...
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