DRAKE SCT4860 Manuale di istruzioni - Pagina 8

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Setup and Programming (continued)

To adjust /set a parameter(s), enter the adjust mode by

pressing the center "ENTER" button for several seconds

until the display begins to flash. You are now in the adjust

mode and the up and down buttons will take you through

the various parameters. Find the desired setting and then

use the right arrow to progress to the next menu. After

setting all parameters in all menus, press the "ENTER"

button once. This will load the settings and save them in

memory.

Pressing the left or right UNIT SELECT button will also

load the settings and save them in memory , just as would

pressing the "ENTER" button, in addition to moving to an

adjacent transcoder.

Note that many of the parameters will not be changed

until the "ENTER" button is pressed. These include:

MODE related settings, LNB type, IF FREQ, BD RATE,

ENCODER, MODULATE, and INTERLV. If you need to

see the result of a change right away for these

parameters, press the "ENTER" button to load and store

the new parameter setting and then you can reenter the

adjust mode by pressing the "ENTER" button again for

several seconds. The RACK ID, RS232, OUTPUT, RF

OUT level, and CHANNEL (output) settings will all change

immediately as soon as they are adjusted.

PRESETS FOR HITS

The SCT4860 provides factory loaded presets for HITS.

When a preset is selected and entered, all of the

operating parameters for the satellite tuner, demodulator

and for the QAM modulator are set to the preset settings.

You will then need to set only the output channel and

level and LNB related parameters. Note that selecting

and entering the HITS options in the mode menu,

changes any other parameters that might have been

adjusted previously to the preset values. If you do not

wish to use presets, be sure that you have chosen the

DCII selection before pressing the enter button to load

and save the values.

SCT4860 QUICK START for HITS - Front Panel Control

1)Connect cables from LNB, to output combiner, and to

PS151 power supply.

2)Plug PS151 AC line cord into power source.

3)Use the Unit Select

(Left) and

tos select the PS151 power supply.

4) Push ENTER button on PS151 for 2 seconds until

display flashes to enter adjust mode.

5)Use the Unit Select

(Left) or

select RS232.

6) Use

(Up) or

(Down) buttons to set to 4800

unless another rate is indicated when setting up a modem

interface. Press ENTER to save this setting.

7)Use the Unit Select

(Left) and

select the desired SCT4860.

8) Push ENTER button on PS151 for 2 seconds until

display flashes to enter adjust mode.

(Left) arrow - CHANNEL menu - Use the

(Down) arrow buttons to select the desired EIA

CATV output channel for this program multiplex.

to select HITS.

to select the desired multiplex corresponding to the EIA

output channel that you set in step 9. This correlation is

determined by the channel map used for your installation.

STACKED or DUAL POL - Set to the type you are using.

settings.

By selecting the HITS mode in step 10, instead of the

generic DCII setting, many of the other adjustable param-

eters have been preset to the values required for these

networks, determined by the preset programming in the

SCT4860. If you reenter the adjust mode later and make

changes to the preset parameters or if you altered any of

the parameters that were preset during the steps above

such that the values do not match the preset values, the

display in the mode menu will revert to DCII.

If the dish has been aimed, you should now see a SN

readout on the display. If it is less than 7 dB, the transcoder

will not stay locked to the satellite signal. If the SN reading

is showing only around 2 dB, you likely are not pointed at

the correct satellite or the dish is not peaked. For reliable

operation, the SN level should be above 10 dB and prefer-

ably even higher. The better the margin above the approxi-

mately 7 dB threshold, the less likely you will encounter

drop outs due to thunderstorms or snow storms.

NOTE: If you are using the RS232 remote control program,

all of the above adjustments may be made via the PC,

except the RACK ID assignment for the PS151 module.

(Right) buttons

(Right) buttons to

(Up)

10)

(Right) arrow - MODE menu - Up or Down arrows

11)

(Right) arrow - HITS menu. Up or Down arrows

12)

(Right) arrow - LNB menu - Up or Down arrows -

13) ENTER - Push once to store and load all of the above

DISH NETWORK AUTO SET

When the using the SCT4860 for DISH Network, select

DISHScan from the MODE menu. Next, in the IF FREQ

menu, select the IF frequency that corresponds to the DISH

Network transponder that is desired. You will then ad-

vance all the way to the OUTPUT menu as the SCT4860

will automatically search for and set the satellite symbol

rate and FEC. Based on what is found, the SCT4860 will

then automatically select the proper QAM encoding, QAM

modulation level, Interleave, etc. Finally, set the desired

output level and EIA channel in the appropriate menus.

If the modulation on a particular transponder is changed by

DISH in the future, the SCT4860 will automatically

reacquire the new signal, assuming it's on the same

frequency, and automatically set the various satellite

demodulator and QAM modulator parameters.

Using the presets will significantly shorten the set up time

for a new headend. These preset settings can be altered at

any time if the required parameters change in the future.

Whenever DISHScan is selected, the rain fade logic is

automatically enabled.

TURBO FEC

Some advanced satellite FEC modes may be selected

under the TURBO menu.