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RF-7000E Operations Manual
Chapter 1. Overview
— 11
Table 4 Transmit Power Backoff
9
per Modulation Type
Modulation Type
10
Backoff
Level 1 PA Output Level 2 PA Output
FM Analog, 24 ~ 96 FDM
0.0 dB
26.0 dBm
30.0 dBm
FM Analog, 120 ~ 300 FDM
0.0
26.0
30.0
FM Analog, 420 ~ 2400 FDM
0.0
26.0
30.0
FM Analog, Color Video
0.0
26.0
30.0
FSK, MSK
0.0
26.0
30.0
BPSK
1.0
25.0
29.0
QPSK, OQPSK, 4PSK, 4QAM
2.0
24.0
28.0
8PSK
4.0
22.0
26.0
16QAM
6.0
20.0
24.0
32QAM
8.0
18.0
22.0
64QAM
10.0
16.0
20.0
128QAM
12.0
14.0
18.0
256QAM
13.0
13.0
17.0
512QAM
14.0
12.0
16.0
32TCM
9.0
17.0
21.0
64TCM
10.0
16.0
20.0
128TCM
12.0
14.0
18.0
256TCM
14.0
12.0
16.0
OFDM QPSK
11.0
15.0
19.0
OFDM 16QAM
15.0
11.0
15.0
OFDM 64QAM
19.0
7.0
12.0
COFDM QPSK
6.0
20.0
24.0
COFDM 16QAM
9.0
17.0
21.0
COFDM 64QAM
13.0
13.0
17.0
9QPRS/QPR3
5.0
21.0
25.0
25QPRS/QPR5
5.5
20.5
24.5
49QPRS/QPR7
6.0
20.0
24.0
81QPRS/QPR9
7.0
19.0
23.0
225QPRS/QPR15
9.0
18.0
21.0
Note: Peninsula Engineering Solutions may change performance specifications where necessary to
meet industry requirements.
9
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-7000E-41 Tx Branch Loss = 2.6 dB,.
Output power at antenna port flange = +30.0
– 13.0 – 2.6 = +14.4 dBm.
10
Modulations listed are the most popular types. List is not exclusive. If a modulation is not listed, contact the
company for specific details.