Toa U-14R Manual de usuario
INPUT PRIORITY MODULE
U-14R
Jukebox gate threshold level control
Jukebox level control
BGM level control
From BGM Tuner Output
From Jukebox Output
1. GENERAL DESCRIPTION
The U-14R is a plug-in type Input Priority module designed to
be used in conjunction with TOA's 900 Series and BG-1000
Series amplifiers.
The U-14R is equipped with 2 inputs: BGM and JUKE, and the
JUKE input has priority over the BGM input. BGM signals are
only output when an input is received. Output automatically
switches over to JUKE signal input when JUKE signals are
received. The threshold level for output switching when a
JUKE signal input is detected can be adjusted.
Each of BGM and JUKE inputs has both L (white jack) and R
(red jack) inputs, which are internally mixed and output. The
JUKE input is equipped with an AGC, which maintains a
uniform output level for varying input signal levels.
The output level for BGM and JUKE inputs can be
independently adjusted. When the U-14R is used with a 900
Series amplifier, its outputs (both BGM and JUKE) can be
turned off using the two MUTE BUS signal channels.
2. CONNECTIONS AND SETTINGS
Connect each external component output to the BGM and
JUKE inputs. Use the BGM level control to adjust the BGM
output level, and the JUKE level control to adjust the JUKE
output level. Output level increases as the control is turned
clockwise.
The JUKE input's threshold level can be adjusted with the
GATE threshold level control. Turning the GATE control
clockwise increases sensitivity, allowing the BGM output to be
switched over to the JUKE signal at a lower signal level.
133-02-00490-00
3. SPECIFICATIONS
When the U-14R is used with a 900 Series amplifier, if a mute
signal is received from the connected external component, the
U-14R operates as shown in the following table, depending on
how the circuit board's MUTE 1 and MUTE 2 jumper wires are
connected:
MUTE 2
jumper wire
Connected
Cut
Connected
Cut
MUTE 1
jumper wire
Connected
Connected
Cut
Cut
47 kΩ (unbalanced)
+14 dB* (5 Vrms)
BGM: 0.03% (1 kHz, 1 Vrms)
JUKE: 0.05% (1 kHz, 1 Vrms)
20 Hz – 20 kHz ±1 dB
BGM: –24 to –4 dB*
(–10 dB* input to L and R)
JUKE: –24 to –4 dB*
(–10 dB* input to L and R)
–60 to –30 dB (input to L and R)
Input
Maximum Output
Distortion
Frequency Response
Output Level Variable
Range
JUKE Gate Threshold
Level Variable Range
* 0 dB = 1 V
U-14R operation (signal output)
Normally enabled (ON).
Disabled (OFF) when the
amplifier's MUTE 1 or MUTE 2
terminal is shorted. (Factory-
preset setting)
Normally enabled (ON).
Disabled (OFF) when the
amplifier's MUTE 1 terminal is
shorted.
Normally enabled (ON).
Disabled (OFF) when the
amplifier's MUTE 2 terminal is
shorted.
Operates as an ordinary input
module. (No mute function
operable.)
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