AMT-70/AMT-73/AMT-75 Installation and Operation
DESCRIPTION SPECIFICATION
21
RF Input Power (See
for Input Power versus Symbol Rate)
BER shall not change with the following:
Desired Carrier: -45 dBm - 10log (40000/R) dBm
(where R = Symbol Rate in kSymbols)
AGC Range: +
20 dB
Max. Composite Input Power: Sum of all carriers +20 dBm; within 10 MHz
30 dBc; +40 dBc
Input Overload: No damage by continuous IF input of 25 dBm
Receive Phase Perturbation Linear phase: <20
o
in 0.2 seconds under following conditions:
Temperature: Rate of change shall be 22
o
/Hr
Vibration: Between 50-2,000 Hz with constant input acceleration of 1.5 gf/Hr.
Shock: Impact of test hammer of 1 lb. attached to 8” arm through vertical plane;
striking face covered with ½” open cell sponge rubber with the following:
Density: 0.027 lbs/cubic inch
Compression Deflection: 7-14 lb/sq in for 25% deflection
Swing: Free swing through 90
o
arc – impact enclosure at bottom of swing
Data Rate (mandatory)
BPSK
QPSK/OQPSK
8PSK/TCM
8PSK/16QAM
64 Kbps to 8472 kbps
64 kbps to 20,000 kbps
1,544 kbps to 51,840 kbps
Up to 52 Mbps using eTPC and HSSI interface
Up to 110Mbps in optional 16QAM Turbo mode
Data Rate Options 16kbps to 10Mbps, 20Mbps, 52Mbps and 140Mbps
Symbol Rate 32 KSymbol to 30 MSymbol
Acquisition Range
Data Rate Max. Initial Acquisition Max. Reacquisition
Acquisition Time (BER of 10
-3
Viterbi with +30
kHz frequency uncertainty)
16 kbps
64 kbps
128 kbps
1.544 Mbps
< 50 seconds
< 25 seconds
< 15 seconds
< 1.5 seconds
< 30 seconds
< 15 seconds
< 10 seconds
< 1 second
Timing (10
-3
BER Viterbi) Bit Count Integrity (BCI): No false additions/deletions in 7 days with up to 50
consecutive 1’s or 0’s without data scrambling.
Synchronization Retention: Per MIL-STD-188-165A
Timing Jitter: +5% with modulated jitter 3%
Doppler Parameter L Band
Doppler (Min. Requirements)
Shift in Hz
Rate of Change (Hz/sec)
Acceleration (Hz/sec
2
)
+
1,200
+
110
+120
½ QPSK
Viterbi
¾ QPSK
Viterbi
7/8 QPSK
Viterbi
2/3 TCM 8PSK
Viterbi
Uncoded
(No FEC)
BER Performance (with scrambler/differential
encoder enabled), in dB
Viterbi BER
10
-3
10
-5
10
-6
10
-7
Viterbi w / RS
10
-5
10
-6
10
-7
eTPC (Optional)
4.0
5.5
6.1
6.7
4.4
4.5
4.6
5.5
6.9
7.5
8.1
5.7
5.8
6.1
6.5
7.8
8.5
9.1
6.6
6.8
6.9
6.6
8.0
9.6
10.4
6.5
6.8
7.0
8.5
10.9
11.9
12.8
Two like carriers each 10 dB above wanted carrier (range dependant on Es/No)
Symmetrical (channel Spacing) Asymmetrical (channel spacing)
1.2 x Data Rate 1.4 x Data rate 1.2 x Data Rate 1.4 x Data rate
BER Degradation with Adjacent Channel Carriers
(subtract from Eb/No values, above)
0.36 to 0.99 dB 0.41 to 1.21 dB 0.38 to 1.01 dB 0.43 to 1.23 dB
Demodulator-to-Demodulator Isolation < 0.2 dB with Eb/No @ BER = 10
-5
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