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Operation and Setup, cont’d
PVS 305SA Switcher • Operation and Setup
3-4
PRELIMINARY
Executive Mode (Front Panel Security Lockout)
To prevent accidental or unauthorized changes to settings, the PVS switcher has a
front panel security lockout (executive mode) that limits users’ access to front panel
controls. When the executive mode is active, all functions are locked.
To turn executive mode on or off via the front panel:
1
. Press and hold input selection buttons 1 and 4 simultaneously for 4 seconds
(see figure 3-2). All the input LEDs light.
2
. Release the buttons. The LEDs extinguish except for the currently selected
input. The switcher has enabled or disabled the executive mode.
Press and hold buttons 1 and 4
simultaneously for 4 seconds.
AUX AUDIO
INPUT SELECTION
1
2 3 4
5
All input LEDs light. to indicate that Release the buttons.
The LEDs extinguish except for the currently selected input.
Executive mode has been enabled/disabled.
INPUT SELECTION
1
2 3 4
5
Figure 3-3 — Setting the executive mode via the front panel
This mode can also be turned on or off through RS-232 control. For details on
RS-232 control, see chapter 4, “Serial Communication”.
Setting Up and Optimizing the Audio
The following steps ensure optimal sound is achieved by configuring the switcher.
For each step, refer to the sections indicated for more information.
Steps for optimizing the audio
1. Ensure all the settings are at default. These are the settings the PVS has upon
initial power up. The default settings are as shown below.
• Volume is set at 50%.
• Bass and treble are set at 0.
• Amplifier level is set to 50%.
• Loudness control is set to Off.
N
Amplifier level and volume level are not the same adjustments. Volume can
only be adjusted by RS-232 or with a potentiometer connected to the rear panel
port labeled “DC Vol”. Amplifier level can only be adjusted via RS-232 or
control software.
2. Ensure that the PVT transmitters are connected to the PVS and that there
is an audio input source present at each of the transmitters. Refer to the
transmitters’ user’s manual for installation/connection information.
3
. Ensure a set of speakers are connected to the PVS 305SA. See appendix B,
“Speaker Configuration” section, for details.
4
. Slowly adjust the volume to 100% via RS-232, by having the MLC increase
the volume, or by a potentiometer connected to the DC Volume port on the
rear panel. If an MLC 104 IP Plus is connected to the PVS, simply rotate the
volume knob clockwise until it is at full volume.
5
. Adjust the input sensitivity for one input through the front panel or by
RS-232 control software to a level just below where audio input is peaking.
See the sections “Individual channel input sensitivity control” and “Front
panel input sensitivity control”, later in this chapter, for details. Repeat for all
five inputs.
N
Adjusting input sensitivity for all inputs ensures that all inputs are at the same
level, and at the highest level possible before peaking occurs. Step 5 ensures that
when the volume is at 100% the audio signal will not be distorted (clipped).