AMT-70/AMT-73/AMT-75 Installation and Operation
DESCRIPTION SPECIFICATION
26
IF Input (Option) 2 x BNC, (F) for 70 MHz / 140 MHz
Impedance: 50
Return Loss: ≥10 dB
RF Input (See A.2.7 for Input Power versus
Symbol Rate)
2 x F-type, (F) for 950MHz to 2150MHz
Impedance: 75
Return Loss: ≥9 dB
Input Level: 10Log (Symbol Rate) -100 dBm, +
12 dB
Maximum Composite Input Power: -20dBm
BER Performance and Channel Spacing Refer to
Figure 6 for Viterbi and Viterbi with Reed Solomon FEC.
Refer to Chapter 16 for DVB-S2 Theoretical Performance
Refer to Chapter 9 for eTPC FEC and Chapter 15.
Typical Eb/No Performance against theory
DVB-S
DVB-DSNG
DVB-S2
QPSK
<0.5dB margin
<0.5dB margin
<0.5dB margin
8PSK
N/A
<0.7dB margin
<0.7dB margin
16QAM/16APSK
N/A
<1dB margin
<1dB margin
LNB Supply Voltage 13V or 18V switchable
450 mA maximum
LNB Signals 22 kHz switching tone available
10 MHz reference output (nominal 0.5V p-p)
DATA & MANAGEMENT INTERFACES
Monitoring & Control (M&C) Front Panel: as standard
External M&C Interface: 10/100Base-T, RS-232, RS-485, SNMP (future
option)
Configuration Parameter Storage: NVRAM
Data Interfaces RS 530 / V35 (standard)
ASI (optional)
Single HSSI interface (standard)
Triple HSSI interface (optional)
Ethernet 10/100 Base-T (optional)
G.703 (optional)
Nx T1/E1(optional)
Receiver ASI Interface Encoded Line Rate: 270 MSymbol ± 100 ppm
Min Sensitivity (D21.5 idle pattern): 200 mV
Max Input Voltage: 880 mV p-p
Discrete Connector Return Loss: ≥15 dB
Max. Distance: 150 m
PHYSICAL SPECIFICATIONS
Physical Dimensions The AMT-70 is a rack-mountable 1RU EIA chassis.
Height: 4.4 cm (1.75")
Width: 43.2 cm (17") without ears and 48.26cm (19”) with ears
Depth: 40.6 cm (16")
Weight: 11 lb (5 kg) maximum
Power AC (DC Optional) AC: Auto sensing 95-265 VAC, 50/60 Hz
DC: 48 VDC (+32 to +72 VDC)
Typical Power Dissipation:
50 W without LNB/BUC power supply
65 W when powering LNB/BDC
150 W when powering BUC and LNB/BDC
Environmental
Operating Temperature: 0°C to 45°C (32°F to 122°F)
Storage Temperature: -25
o
C to 85
o
C (-13
o
F to 185
o
F)
Relative Humidity: up to 90% non-condensing, operating; up to 95% non-
condensing, storage
Altitude: Up to 10,000 ft (3,045 m) operating; to 40,000 ft
(12,180 m) during transit
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General