NSG 8R1G是一个高密度哈雷公司NSG™9000通用边缘QAM平台中采用的QAM RF模块 。该模块有两个RF端口，每个端口能够 输出1到8 QAMs的（ITU-T J.83 ANEX B / C）或6 QAMs（ITU-T J.83 ANEX A）。配置RF输出端口是高度灵活的，允许最大数的QAMs，并将QAMs的频率位置为每个端口进行设置在一个48MHz块之内。
NSG 8R1G可用于多种应用，包括视频点播（VOD），交换式数字视频（SDV），广播和DOCSIS兼容 模块化CMTS（M-CMTS）。作为NSG 9000平台，8R1G QAM RF模块可以很容易地有效地被管理和配置：使用独立的Web GUI，集群配置工具（MCT），哈雷公司NMX™数字服务管理器或任何其他的SNMP兼容的管理平台。
【技术参数】
RF PERFORMANCE
RF Frequency Range 50 MHz to 1002 MHz
RF Frequency Step Size 62.5 kHz
Carrier’s Frequency Offset ± 3 KHz
QAM Constellations over temp and time
Annex A,C 16, 32 ,64, 128, 256
Annex B 64, 256
QAM Density
Annex B/C 1-8 flexibly located QAM channels per RF port
Annex A 1-6 flexibly located QAM channels per RF port
RF Output Power per Channel Annex A Annex B
N=1 62 dBmV 62 dBmV
N=2 59 dBmV 59 dBmV
N=3 57.2 dBmV 57.2 dBmV
N=4 56 dBmV 56 dBmV
N=6 53 dBmV 54.2 dBmV
N=8 N.A. 52 dBmV
RF OUTPUT
Power Adjustment 8-dB in 0.1-dB steps
Range Amplitude Response < 0.25 dB (per QAM)
Unequalized MER
Annex B > 37 dB (typical > 41 dB)
Annex A > 35 dB (typical > 37dB)
Equalized MER
Annex B > 45 dB (typical > 47dB)
Annex A > 43 dB (typical > 45 dB)
Phase Noise (double sided)
1KHz - 10KHz < -35 dBc (typical <- 40 dBc)
10KHz – 50KHz < -54 dBc (typical <- 57 dBc)
50KHz – 3MHz < -57 dBc (typical <- 60 dBc)
Output Return Loss 14-dB within any channel from
50 MHz to 1002 MHz (typical > 16 dB)
Port to Port Isolation 80 dB (all Annexes)
BER 1 x 10¯12
Group Delay < 10 ns peak to peak
COMPLIANCE (TESTED WITHIN THE NSG 9000 PLATFORM)
Electromagnetic Interference FCC Part 15 subpart B, Class A
EN 55022/CISPR 22 Class A
EN 61000-3-2:1995 +A1:1997 + A2:1998
EN 61000-3-3:1995
Immunity: EN50082-1:1997
Safety Low Voltage directive 73/23/EEC,
50083-1 standard
EN/IEC60529
UL 60950-1:2003
CAN.CSA-C22.2 No. 60950-1-03
CE Compliant with R&TTE 1999/5/EC,
89/336/EEC, Article 7(1)., 73/23/EEC,
Article 5., FCC 47 CFR part 15, subpart B.,
ICES-003:1997 Council Directives
ESD EN 61000-4-2; EN 55024, Section 4.2.1
ENVIRONMENTAL
Storage Temperature Range -4°F to 176°F (-20°C to +80°C)
Operating Temperature Range 32°F to 122°F (0°C to +50°C)
Relative Humidity 0 to 95% non-condensing
PHYSICA L
Dimensions (WxHxD) 4.52” x 0.74” x 18.7”
11.5cm x 1.88cm x 47.5cm
Weight 2.31 lbs
1.050 kg
Typical Power Consumption 40 Watt
Output Connectors 2 x ANSI/SCTE 02 2006 Type-F RF connectors,
75Ω output impedance
ORDERING INFORMATION
8R1G RF module part number NSG-8R1G-01