Setup and Programming, continued 9
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
CW
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
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
