Velleman VDL215EQ Manual Del Usuario página 2

b. Rear Panel – Connections
8. Power cord
Fig.2
9. 110/220V power switch
10. Fuse holder
11. Ground lifting switch: to disconnect the signal ground from chassis ground
12. Output connectors (RCA, XLR and 6.3mm = ¼"TRS)
13. Input connectors (RCA, XLR and 6.3mm = ¼"TRS)
The RCA connections are unbalanced: pin = Hi (+) and sleeve = ground.
The TRS (Tip Ring Sleeve) connectors are balanced and wired as tip = Hi (+), ring = Lo (-) and sleeve = ground.
For unbalanced operation, use the tip as Hi (+) and the sleeve as ground.
The XLR connectors are balanced and wired as pin1 = ground, pin2 = Hi (+) and pin3 = Lo (-).
For unbalanced operation, use pin 2 as Hi (+) and pin 1 as ground.
6. Signal Levels
Signal levels from –10dBu to +4dBu are considered normal and there is a minimum tolerance of 20dB above these.
Never connect a microphone directly to an equalizer. Microphones have to be connected to a preamplifier first.
7. Chassis Grounding
The rear panel of this unique equalizer is equipped with a ground-lifting switch. Excessive humming or buzzing once
the system has been installed indicates a ground incompatibility between your equalizer and the other equipment in
the system. Several combinations can be attempted. Note: ALWAYS TURN OFF YOUR AMPLIFIERS BEFORE
CHANGING GROUND. Try different combinations on units equipped with ground-lifting switches or make sure that
all chassis are connected to earth ground through the mounting screws fixing the front panel to the rack.
8. Operating instructions
The equalizer is equipped with an activation switch (fig.1 #2) with a LED indicator. When the activation switch is ON,
the red LED will be lit and the equalizer settings will be used. When the switch is off, the red LED is off and the
device is in bypass mode: the signal will flow through at unity gain.
Also included is a 6/12dB range selection switch (fig.1 #3): the 6dB range has a green LED, the 12dB range a red one.
A 'low cut' switch (fig.1 #4) is provided as well: this switch sets the 30Hz level to -6dB.
A level control slider (fig.1 #5) controls the output with its range of -∞ to +6dB.
Note: In case of excessive gain, the red peak LED (fig.1 #6) will light up when the signal comes to within 3dB of the
clipping level. There is no problem if this occurs occasionally and the LED only flashes from time to time ; if the LED
is lit continuously, the user should readjust the level control. Below are some tips for the initial setup.
1. Put the channel level controls (fig.1 #5) on the front panel on the central indentation (0dB).
2. Put the equalizer in the bypass position.
3. Put all slide controls on the central indentation (0dB).
4. Select the 6dB range (fig.1 #3 ; green LED on).
5. Apply a signal to the system.
6. Engage the equalizer mode.
7. If the PEAK (overload) LED is lit : turn down the level control.
8. You may now start equalizing your system.
9. Switch to the 12dB range (red LED is lit) if the 6db range does not provide sufficient gain.
VDL215EQ 2 VELLEMAN