Radyne ComStream DM240-DVB, Инструкция по установке и эксплуатации

Страница: 25 / 113

User Interfaces DM240-DVB High-Speed Digital Modulator
4-6 TM083 - Rev. 3.0
RFSWITCH {PRIME, BACKUP}
{OFFLINE, ONLINE}
This menu is available only when RF Switch support
hardware is installed. The first status line indicates the
side of the RF switch that the DM240 is attached (prime
or backup). The second status line indicates if the output
of the DM240 is the active output of the RF switch
(online) or inactive (offline).
MONITOR
ALARMS
SYSTEM
TEST
4.2.2 Modulator Menu Options and Parameters
NETWORK SPEC:
{DVB-S, DPC, DVB-S2-BS-NBC, DVB-S2-BS-BC}
Indicates the network specification to which the unit
configuration adheres.
FREQUENCY ( MHz):
IF Carrier Frequency:
Enter in 100 Hz increments within the following ranges:
50 MHz to 90 MHz
100 MHz to 180 MHz
950 MHz to 2050 MHz
POWER (dBm):
Transmitter output power:
Enter in 0.1 dBm increments from:
-25.0 to 0.0 dBm
CARRIER:
{ON, OFF}
Transmitter Power On/Off Control.
MODULATION:
{BPSK, QPSK, 8PSK, 16QAM}
Modulation Type.
INNER FEC RATE:
1/4, 1/3, 2/5/, 1/2, 3/5, 2/3, 3/4, 4/5, 5/6, 6/7, 7/8, 8/9,
9/10
DATA RATE (BPS):
Terrestrial Data Rate:
Enter in 1 Bps increments from 1,000,000 to
238,000,000 BPS.
SYMB RATE (SPS):
Output Symbol Rate:
Enter in 1 SPS increments from 1,000,000 to 68,000,000
Sps.
SPECTRUM:
{NORMAL, INVERTED}
ROLL OFF:
{0.35, 0.25, 0.20}
Changes the Spectrum Roll Off