Peninsula Engineering Solutions RF-8000E, Руководство по эксплуатации, Страница: 19 / 78

R
R
F
F
-
-
8
8
0
0
0
0
0
0
E
E
M
M
i
i
c
c
r
r
o
o
w
w
a
a
v
v
e
e
R
R
F
F
R
R
e
e
p
p
e
e
a
a
t
t
e
e
r
r
RF-8000E Operations Manual Chapter 1. Overview — 11
Table 4, Transmit Power Backoff
13
per Modulation Type
Modulation Type
14
Backoff
15
Level 2 PA Output
Without Radio FEC With Radio FEC
FM Analog, 24 ~ 96 FDM 0.0 dB 30.0 dBm 30.0 dBm
FM Analog, 120 ~ 300 FDM 0.0 30.0 30.0
FM Analog, 420 ~ 2400 FDM 0.0 30.0 30.0
FM Analog, Color Video 0.0 30.0 30.0
FSK, MSK 0.0 30.0 30.0
BPSK 1.0 29.0 29.0
QPSK, OQPSK, 4PSK, 4QAM 2.0 28.0 28.0
8PSK 4.0 26.0 26.0
16QAM 6.0 24.0 24.0
32QAM 8.0 22.0 24.0
64QAM 10.0 20.0 24.0
128QAM 12.0 18.0 23.0
256QAM 13.0 17.0 22.0
512QAM 14.0 16.0 21.0
1024QAM 15.0 N/A 20.0
2048QAM 16.0 N/A 19.0
32TCM 9.0 21.0 24.0
64TCM 10.0 20.0 24.0
128TCM 12.0 18.0 23.0
256TCM 14.0 16.0 21.0
OFDM QPSK 11.0 19.0 20.0
OFDM 16QAM 15.0 15.0 18.0
OFDM 64QAM 18.0 12.0 16.0
COFDM QPSK 6.0 24.0 26.0
COFDM 16QAM 9.0 21.0 25.0
COFDM 64QAM 13.0 17.0 21.0
9QPRS/QPR3 5.0 25.0 25.0
25QPRS/QPR5 5.5 24.5 24.5
49QPRS/QPR7 6.0 24.0 24.0
81QPRS/QPR9 7.0 23.0 23.0
225QPRS/QPR15 9.0 21.0 21.0
Note: Peninsula Engineering Solutions may change performance specifications where necessary to
meet industry requirements.
13
Transmit power set point is reduced as the modulation becomes more complex.
This power “backoff” provides adequate linearity as required by the system performance objectives.
The ALC adjustment on each amplifier is used to set the output power level. To calculate the repeater’s
output power at the antenna port flange, take the amplifier power output without backoff, reduce that level by
the backoff listed in this table, then subtract the transmit branch loss for the specific configuration from
Tables 2 or 3.
For Example: Level 2 Amplifier Power Output = +30 dBm without backoff reduction;
Modulation is 256QAM, therefore backoff = 13.0 dB, RF-8000E-041 Tx Branch Loss = 2.6 dB;
Output power at antenna port flange = +30.0 – 13.0 – 2.6 = +14.4 dBm.
14
Modulations listed are the most popular types. List is not exclusive. If a modulation is not listed, contact the
company for specific details.
15
Backoff values without considering radio forward error correction (FEC). Radio FEC can correct for a modest
amount of added in-band distortion products resulting in greater amplifier output power permissible.