1.接收制式:
receiving system: tdmb
2.输入阻抗:
input impedance:75ωunbalance
3.中频频率:
dtv intermediate frequency:36mhz
atv intermediate frequency: 38.9mhz
4.带宽:
bandwidth: 8mhz
5.频率覆盖范围:
frequency coverage
band |
frequency(mhz) |
low band |
46 mhz ~ 158 mhz |
mid band |
158 mhz ~ 446 mhz |
high band |
446 mhz ~ 862 mhz |
6.使用和测试条件:
use and test conditions:
|
存储条件 storage conditions |
使用条件 use conditions |
测试条件 test conditions |
温度 temperature |
-20~+80℃ |
0~+60℃ |
25±5℃ |
相对湿度 relative humidity |
45%~65% |
≤95% |
60±15% |
气压 atmosphere |
86~106kpa |
86~106kpa |
86~106kpa |
7. 各端子电压电流:
voltage & current at each terminal:
端子名称 terminal name |
端子电压 terminal voltage |
端子电流 current |
备注 remark |
rf agc |
0.3v~4v |
|
|
vcc |
4.75v~5.25v |
200ma |
ripple≤10mvpp |
if agc |
0v~3.5v |
|
|
8.电气指标
electrical data
s/n |
参数(parameter) |
min. |
typ. |
max. |
unit |
8.1 |
功率增益(power gain) ―vhf low ―vhf high ―uhf |
48 48 48 |
55 50 50 |
— — — |
db |
8.2 |
增益差(gain taper) ―vhf low ―vhf high ―uhf |
— — — |
— — — |
8.0 8.0 8.0 |
db |
8.3 |
agc控制范围 rf agc control range if agc control range total agc control range |
40 50 90 |
60 50
|
|
db |
8.4 |
噪声系数(noise figure) ―vhf low ―vhf high ―uhf |
— — — |
5.5 5.5 6.5 |
8.0 8.0 9.0 |
db |
8.5 |
天线输入端电压驻波比 (antenna input vswr) ―vhf low ―vhf high ―uhf |
— — — |
2.5 2.5 2.5 |
7.0 7.0 7.0 |
|
8.6 |
镜象抑制比(image rejection) ―vhf low (under 300mhz) ―vhf high (under 300mhz) ―uhf |
55 55 50 |
60 60 55 |
— — — |
db |
8.7 |
本振停振电压 (local frequency stop voltage bm) |
|
|
4.0 |
v |
8.8 |
中频抑制比(if rejection) |
60 |
— |
— |
db |
8.9 |
相位噪声(phase noise) 1khz 10khz 100khz |
|
-55 -80 -95 |
-65 -70 -105 |
dbc
|
8.10 |
Zui大输入信号电平 the max input signal level |
95 |
— |
— |
dbμv |
8.11 |
输入端本振干扰电压 osc. voltage at input f≤1000mhz f>1000 mhz |
— — |
— — |
46 52 |
dbμv |
"供应高频头DTMB 9VM-80系列"的加工定制为是,品牌是CDT,型号为CDT-9VM32J-80,种类是调谐器