DRAKE MQM1000 Instruction Manual - Page 6

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Installation & Mounting / Front Panel Controls

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.

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

ENTER

ASI A

ASI B

26.88dB

24.52dB

MQM1000 Multiplexing QAM Modulator

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

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.

Down Buttons – Use the down and