Product feature
(1) The forward path preceding stage adopts the newest high index imported low noise push-pull amplifier module or GaAs push-pull module, output stage adopts the newest high index imported power doubly amplifier module or GaAs amplifier module. The nonlinear index is good and output level is more stable. The return path adopts the newest high index imported return dedicated amplifier module. The distortion is low and the signal to noise ratio is high.
(2) It is more convenient to debug because of the plug-in duplex filter, plug-in fixed (or adjustable) equalizer and attenuator, and the scientific and reasonable on-line detection ports.
(3) The equipment can long time continuous work steadily under outdoor bad environmental condition. Because of the aluminum waterproof housing, high reliability switching power supply and strict lightning protection system.
(4) The shell adopts embedded modular design; equipment maintenance, replacement, and debugging are convenient.
Technical data
|
Item |
Unit |
Technical Parameters |
|
Forward Path |
|
Frequency range |
MHz |
47/54/85-862/1003 |
|
Rated gain |
dB |
30 |
34 |
36 |
38 |
40 |
|
Minimum full gain |
dB |
≥30 |
≥34 |
≥36 |
≥38 |
≥40 |
|
Rated input level |
dBμV |
72 |
|
Rated output level |
dBμV |
108 |
|
Flatness in band |
dB |
±0.75 |
|
Noise figure |
dB |
≤10 |
|
Return loss |
dB |
≥16 |
|
Attenuation |
dB |
1-18 (Fixed insert,1dB stepping) (Specify to user) |
|
Equilibrium |
dB |
1-15 (Fixed insert,1dB stepping) (Specify to user) |
|
C/CTB |
dB |
65 (Test: 79 channels, output level: 85/550/860MHz) |
|
C/CSO |
dB |
63 |
99/105/108 dBuV |
|
Group delay |
ns |
≤10 (112.25 MHz/116.68 MHz) |
|
AC hum modulation |
% |
< 2% |
|
Gain stability |
dB |
-1.0 ~ +1.0 |
|
Return Path |
|
Frequency range |
MHz |
5 ~ 30/42/65 |
|
Rated gain |
dB |
≥20 |
|
Minimum full gain |
dB |
≥22 |
|
Maximum output level |
dBμV |
≥ 110 |
|
Flatness in band |
dB |
±0.75 |
|
Noise figure |
dB |
≤ 12 |
|
Return loss |
dB |
≥ 16 |
|
Carrier to second-order inter-modulation ratio |
dB |
≥ 52 |
Test Condition: Output level 110dBuV, test points: F1=10MHz,f2=60MHz,f3=f2-f1=50MHz |
|
Group delay |
ns |
≤ 20 (57MHz/59MHz) |
|
AC hum modulation |
% |
< 2% |
|
General Performance |
|
Characteristic impedance |
Ω |
75 |
|
Test port |
dB |
-20±1 |
|
Power supply voltage |
V |
A:AC (135 ~ 250) V; or B:AC(35 ~ 90) V |
|
Impulse withstand voltage(10/700μs) |
kV |
> 5 |
|
Power consumption |
W |
29 |
|
Dimension |
mm |
295 (L) × 210 (W) × 150 (H) |
Note: Different modules, different parameters.
Block Diagram
