Drake MQM6000L Multiplexing QAM Modulator - Manual (Page 6)

6 Installation & Mounting / Front Panel Controls
INSTALLATION AND MOUNTING NOTES
this equipment is designed to be installed in a standard 19” rack. When the unit is mounted above or below other
rack mounted equipment, a 1U space should be left between the unit and the other equipment to allow ambient
air flow between the units.
Connect the AC line cord to an appropriate source of 120 volt, 50/60 Hz AC power. the mqm6000L is always on
once the AC power cord is connected to its power source.
Front Panel Controls
F1, LCD Display – this display presents the selected menu screen and the parameter settings. the backlight
in the display is on when power is applied. When not in adjust mode the qAm output symbol rate in mbits
per second is displayed. Pressing the down button shows the buffer status as a percentage of its maximum
capacity. the left percentage represents the current buffer status and the right number represents the maximum
percentage of buffer capacity that was reached since the unit was last programmed. if either of these numbers
reaches 100%, it is probable that too much data is being processed which will likely result in missed frames, video
or audio breakup, or other anomalies in the output signal.
Repeatedly pressing the down button will toggle back and forth between the buffer status screen and the qAm
output symbol rate screen. Pressing the up button causes the display to show the firmware version number.
Repeatedly pressing the up button will cause the display to toggle back and forth between the firmware version
number and either the qAm output symbol rate screen or the buffer status screen, which ever one is selected
with the down button.
F2, ENTER button – Use the eNteR button to enter the adjust mode or to save and load a new setting or settings
after adjustment. Hold for 2 seconds until the bottom line of the display starts to flash to enter the adjust mode. After
entering the adjust mode, momentarily pressing the eNteR button again will load and save any settings that may
have been changed using the f5 & f6 buttons.
F3 & F4, Left and Right Buttons – Use the left and right arrow buttons to navigate from screen to screen to view
a parameter setting. these buttons are operational in the view mode or the adjust mode. Using only these buttons
will not change any parameter settings. After a short period of button inactivity, the default display will be returned.
F5 & F6, Up and Down Buttons – Use the up and down arrow buttons to change the value of a viewed parameter
setting. the unit must be in the adjust mode with the display flashing in order for these buttons to become active for
changing a parameter setting. if the unit is not in the adjust mode, pressing the up button will display the firmware
version number or pressing the down button will display the output qAm symbol rate.