DRAKE TMQAMasi Руководство - Страница 2

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REAR PANEL CONNECTIONS

44 MHz

IF OUTPUT

POWER

+12 V

GND

+5 V

Figure 2

R1 - 44 MHz IF OUTPUT Connector

This is the modulator output. The level is

+30 dBmV.

R2 - 25 Pin SPI LVDS INPUT Connector

This is the MPEG2 transport stream input -

DVB Synchronous Parallel Interface. The levels

comply with low voltage differential signalling

specifications.

R3 - DC Power Connector

This is the power input connector. Connect to a

Drake PS8 or equivalent power supply,

(12 V @ 0 mA, 5 V @ 380 mA for the SPI

input version).

44 MHz

IF OUTPUT

Figure 3

R4 - 44 MHz IF OUTPUT Connector

This is the modulator output. The level is

+30 dBmV.

R5 - 75 Ohm, Type BNC Connector

This is the MPEG2 transport stream input; ASI

input, asynchronous serial interface.

R6 - DC Power Connector

This is the power input connector. Connect to a

Drake PS8 or equivalent power supply,

(12 V @ 0 mA, 5 V @ 500 mA for the ASI

input version).

CONNECTIONS AND CONTROLS

All connections to and from each modulator are

made through the rear panel. Refer to Figure 4

for correct cable and wiring connections.

ASI TRANSPORT

STREAM INPUT

POWER

SUPPLY

+12 V

GND

+5 V

90-260 VAC

DC OUTPUTS X 8

AC POWER

CORD

TMQAM OPERATION AND SETUP

The TMQAM provides user access to many

parameters of the modulator so that it can be

setup to precisely match the requirements of

the system.

1) To VIEW parameter settings only – no

adjustment:

Press either the left or right arrow buttons to

scroll through each parameter page. The

parameter is listed on the first line of the display

and the present setting will be displayed on the

second line. After viewing, press the left or right

arrow button again to advance to the next

parameter. After viewing, the display will

time-out and return to the output baud (BD)

rate/symbol rate page.

RACK MOUNTING

Adequate ventilation is very important in

multichannel installations. Units should be

spaced apart by at least one panel height

wherever possible, and some air movement is

mandatory in enclosed rack cabinets.

Excessive heat will shorten component life and

modulator performance will be degraded

without proper cooling.

QAM MODULATOR

UNITS

IF IN

44 MHz

IF OUTPUT

POWER

12V GND 5V

RF OUT

TO QAM

DISTRIBUTION

Figure 4

2) To ADJUST or change parameter settings

or for initial set up, follow these steps:

Press and hold the enter button for 2 to 3

seconds until the display begins to flash. Press

the left or right arrow button to scroll to the

desired parameter. Now press the up or down

arrow button to adjust the parameter value.

Note that no change is made at this point until

the new value is loaded and saved. When the

value is adjusted to the value required, press

the enter button again. This will load and save

the new value until this procedure is repeated.

INSTALLATION

DUC550 OR DUC860

UPCONVERTERS

IF IN

44 MHz

IF OUTPUT

POWER

RF OUT

FROM SATELLITE

DEMODULATOR OR

OTHER LVDS DATA

STREAM