| Sefram7851 DVB-T/S |
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| SEFRAM 7850 系列提供所有DVB-T,DVB-C, DVB-S 所需的测量功能, 拥有6.5英寸高解析的显示器可以显示所选频道的所有参数. 内建超快速的频谱分析, NIT, Cell-ID, checksat以及自动设置功能, 大幅节省了您调适天线所需的时间. 整机含电池重量仅为2.1kg, 加上小巧的外型使的7850系列产品成为野外测试的*佳选择. |
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 6.5英寸彩色液晶显示器 |
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重量仅2.1公斤 |
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可显示电视节目图象 |
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支持DVB-T，DVB-C，DVB-S及DVB-S2 |
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超高速高质量频谱分析 |
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OSD，PID支持 |
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支持GPS |
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超高灵敏度 |
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| Technical Specifications |
-- |
Terrestrial Band |
Satellite Band |
| Frequency |
Range |
45-865MHZ |
950-2150MHZ |
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Resolution |
measure 25KHZ,display 1KH |
measure 25KHZ,display 1KH |
| Level measurements |
Dynamic range |
20-120dBuv |
30-110dBuv |
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Noise floor level |
5dBuV typical |
-- |
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Units |
dBuV,dBmV,dBm,V |
dBuV,dBmV,dBm,V |
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Accuracy |
±2dB±0.05dB/℃ |
±3dB±0.05dB/℃ |
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Resolution |
0,1dB |
0,1dB |
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Filters |
automatic with selected 1 |
-- |
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Input |
BNC 75ohm |
BNC 75ohm |
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Max.permissible voltage |
80VDC,80Vrms/50HZ |
80VDC,80Vrms/50HZ |
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Standards |
B,G,D,K,I,L,M,N,FM,carrie |
PAL,SECAM,NTSC,DVB-S,DVB- |
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Measurements |
V,C/N,V/A1,V/A2according |
RF,C/N |
| Uitra fast spectrum analy |
Sweep time |
100ms typ.(10 times/s) |
100ms typ.(10 times/s) |
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Filters |
automatic with selected s |
1MHZ |
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Attenuator |
automatic with selected f |
automatic 0to60dB/5dBstep |
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Dynamic |
60dB(10dB/div),30dB(5dB/d |
60dB(10dB/div),30dB(5dB/d |
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Span |
10MHZ to full span with 1 |
50MHZ to full span with 1 |
| Measurement map |
Capacity |
scrolling of 12 programs |
-- |
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Display |
graphical or text |
-- |
| Checksat mode |
1 |
-- |
fast search of satellite, |
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2 |
-- |
30 satellites typical,wit |
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3 |
-- |
4 transponders/satellite, |
| Memory |
saving |
internal,non,volatile mem |
internal,non,volatile mem |
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Data |
place,measure(level,BER/M |
place,measure(level,BER/M |
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Capacity |
512Ko(max.1000files or fl |
512Ko(max.1000files or fl |
| Auxiliary inputs and outp |
USB interface |
mini USB connector |
mini USB connector |
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Power supply |
jack 5.5mm,15Vmax,5Amax |
jack 5.5mm,15Vmax,5Amax |
| Remote supply and control |
Voltage |
5/13/18V,500mA max |
13/18V,500mA max |
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Diseqc |
-- |
Diseqc1.2 |
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22KHZ |
-- |
22KHZ,Minidiseqc.toneburs |
| Digital measurements |
1 |
C-OFDM |
DVB-S,DVB-S2 |
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Bit error ratio |
CBER(before viterbi)VBER( |
CBER,VBER,UNC,LDPC,BCH,PE |
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Modulation Error Ratio(ME |
5-35dB |
0-20dB |
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Symbol rate(1) |
-- |
1-45Ms/s |
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Bandwidth |
6MHZ,7MHZ,8MHZ |
-- |
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Constellation |
automatic |
QPSK and 8PSK |
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Viternbi rate |
automatic |
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automatic |
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1/2,2/3,3/4,5/6,7/8,8/9,9 |
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Standards(1) |
EN 300-744 |
EN 300-421 EN302 307 |
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2 |
NICAM |
-- |
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Frequency |
45-865MHZ |
-- |
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Standard |
B,G,D,K,I,L |
-- |
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Error measurement |
BER(parity) |
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