GLP 7687 User Manual page 14

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No-DMX (behavior when the luminaire is not receiving a DMX signal)
You can set the luminaire to respond in four different ways if no DMX signal is present (if
the luminaire is being controlled by DMX but the DMX signal stops, or if you apply
power to the luminaire when no DMX signal is present):
• Hold sets the luminaire to continue obeying the last DMX values it received. This is the
default setting.
• Blackout sets the luminaire to black out whenever it is not receiving a DMX signal.
• Stand-Alone sets the luminaire to play its stored stand-alone scene (see DMX Shot
below) when the luminaire is not receiving a DMX signal. If no stand-alone scene is
stored in memory, the luminaire will black out.
• DMX Shot takes a snapshot of the DMX values that are currently being received and
stores them in the luminaire's memory as its stand-alone scene. The luminaire will
display this stand-alone scene if it is set to Stand-Alone (see above) and is not
receiving a DMX signal.
You can select one of the above four settings using the control panel or the
Control/Settings DMX channel.
Zoom
The impression FR1 TM has a 10:1 zoom range. You can narrow the beam angle from
35° in flood mode to 3.7° in spot mode.
Zoom can be inverted from flood  spot to spot  flood using the control panel and
the Control/Settings DMX channel. The default setting for zoom inversion is OFF.
Control panel
The control panel on the side of the yoke has a backlit graphic LCD display for setting
up the luminaire and changing luminaire settings. See 'Control menu layout' on page
22 for a table showing the control menu structure and options available.
PWM frequency
You can change the LED dimming PWM frequency using either a DMX command or a
control panel setting in order to avoid flicker and beat frequencies in video images.
The default PWM setting is 582 Hz. You can adjust the PWM frequency continuously
from 582 to 618 Hz, or you can set it to either 1200, 2400, 4800 or 9600 Hz. Note that a
higher PWM frequency may affect dimming performance.
The PWM frequency setting is stored in the luminaire and is not affected by cycling
power off and on. However, it will be affected if you use the Factory default command
in the control menus.
You should set all the luminaires in an installation to the same PWM frequency in order
to ensure the same performance. As described above, you can do this using the PWM
frequency selection or Factory default commands in the control menus or using the
PWM frequency DMX channel.
14 impression® FR1 TM
User Manual