DRAKE DTD1000 Gebruiksaanwijzing - Pagina 7

Blader online of download pdf Gebruiksaanwijzing voor {categorie_naam} DRAKE DTD1000. DRAKE DTD1000 19 pagina's. Hybrid qam modulator; digital tuner and demodulator module; encoder module; asi input module

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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. A built in fan provides air movement through

the unit.

When connecting an incoming RF signal source to two DTD1000 modules, note that the antenna or CATV

source must be connected to both the A and 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 MEQ1000 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 thresh-

old 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

ENTER

QAM OUTPUT

0.000 Mbits/S

MEQ1000 Multiplexing Edge QAM Modulator

SELECT

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

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.

F7 & F8,

Select

Buttons - Use the left or right

Select arrow buttons to select which section of the unit to

control. Select one of the input modules or the QAM

modulator / up converter section.