DRAKE MQM1000 Manuel d'instruction - Page 9

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QAM Mode:

QAM-16A

QAM-32A

QAM-64A

QAM-128A

QAM-256A

QAM-512A

QAM-1024A

QAM-64B

QAM-256B

QAM-1024B

Gray Encoding:

DVB (Only if ITU-A selected)

DAVIC

QAM Sym Rate:

Preset (If Preset, Sym Rate is...

DQT, MQM

5.0000 for all ITU-A,

5.0570 for QAM-64B

5.3606 for QAM-256B

5.3606 for QAM-1024B)

Manual

QAM Sym Rate:

x.xxxx M Sym/Sec (Only if Manual)

DQT, MQM

Interleaver:

I128,J1 (Only if ITU-B selected...

I128,J2 fixed at I12,J17 if ITU-A)

I64,J2

I128,J3

I32,J4

I128,J4

I16,J8

I128,J5

I8,J16

I128,J6

I4,J32

I128,J7

I2,J64

I128,J8

I1,J128

Output Format:

Normal

STANDBY

PRBS 15

PRBS 15M

PRBS 23

PRBS 23M

Output ChanMap:

CATV

IRC

HRC

Broadcast

OUTPUT CHANNEL:

RF OUT:

xx.x dBmV (45.0 to 62.0 dBmV)

UNIT ID:

# (0 thru 63)

RS232 Baud Rate:

2400

4800

9600

19,200

Setup and Programming, continued

DEMOD A CHANMAP: Select the setting corresponding to

source of the input to DEMOD A. Choices are BROADCAST,

CATV, IRC, HRC.

DEMOD A CHANNEL: Select the desired channel number.

DEMOD A MODE: Select the modulation type of DEMOD A

input signal. Choices are VSB-8, VSB-16, QAM-256B, QAM-

64B, QAM-256A, QAM-128A, QAM-64A, QAM-32A, QAM16A.

Off air broadcast signals will be VSB-8. In the QAM

choices, the B suffix is DigiCipher II (used by most major

MSOs) and the A suffix is DVB.

DEMOD A SYMRATE: This is the symbol rate or baud rate of

the desired input signal on the DEMOD A input. The

choices are PRESET or MANUAL. If PRESET is selected, the

most commonly used rates are set and can be viewed in the

screen following this screen after exiting the 'adjust'

mode. If MANUAL is selected, use the right arrow to go on

to the continuation of this screen and then use the up and

down arrows to set the desired symbol rate. Use PRESET

for off-air VSB-8, signals.

MULTIPLEX: This setting determines whether the DEMOD

A input is to be multiplexed with a second input (if in-

stalled). Select DEMOD B to activate the B channel

demodulator and to turn on the multiplex function. Select

ASI if the second input is present at the ASI input connector

and it is desired to multiplex this ASI input stream with the

stream from DEMOD A. DEMOD B (if also installed) will be

turned off in the ASI setting. When DEMOD B is chosen,

any data at the ASI input is ignored. If the DQT1000 is

being used as a processor of only one input at DEMOD A,

select DISABLED. If DISABLED is selected, the next menu

will be the QAM MODE menu, you may skip to that para-

graph, below.

MPEG PROGRAMS: This menu provides selections to

determine which programs are multiplexed to form the

new multiprogram transport stream output that will be

supplied to the QAM modulator section. Choose the

SELECT ALL PROGS setting to multiplex all programs

from inputs A and B.

It is the operator's responsibility to be sure that the total

data rate of these programs does not exceed the maxi-

mum data rate for the output QAM mode that will be used.

If the total input rate is too large, some programs will have

to be dropped from the multiplex.

Choose the SELECT PROGRAMS setting to allow the

operator to pick which programs from the A and B inputs

are to be included in the output multiplex.

NOTE: At this point you may proceed through the remain-

ing menus, below, before pressing the ENTER button to

load the selected data OR you may press ENTER now and

then come back to the rest of the menus. In any case,

when the ENTER button is pressed, one of the following

two actions will occur:

A) If SELECT ALL PROGS has been selected, the

DQT1000 will now read PAT tables from the two input

streams and