Product data

6 Installation & Mounting / Front Panel Controls
F1 F2 F5 F6
F3 F4
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.
During operation, the S/N (signal to noise ratios) of the
demodulator input signals are displayed. For 8VSB
inputs, the threshold is about 15 dB. For QAM inputs, the
threshold is about 23 dB for 64QAM and 27 dB for
256QAM. You should maintain a S/N several dB above
these thresholds for reliable operation.
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 down and
up arrow buttons to change the value of a viewed param-
eter 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.
NOTE: The DQT1000 is shown but the MQM1000 has
essentially the same front panel functionality except that
certain menus will not be available for navigation.
INSTALLATION AND MOUNTING NOTES
This equipment is designed to be installed in a standard 19” rack. All models have a built in fan to provide air
movement through the unit. 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.
When connecting an incoming RF signal source to the DQT1000 DEMOD A and DEMOD B (if installed) inputs,
note that the antenna or CATV source must be connected to both the DEMOD A and DEMOD B input connectors.
These inputs are kept separate in case the inputs need to come from different antennas or one antenna and one
CATV source. Connect the AC line cord to an appropriate source of 120 volt, 50/60 Hz AC power. The DQT1000
is always on once the AC power cord is connected to its power source.
ENTER
24.52dB26.88dB
MQM1000 Multiplexing QAM Modulator
ASI A ASI B