Description
OPCA-8338C outdoor bi-directional AGC trunk amplifier is new developed and high gain amplifier. It is adapts optimization circuit design, with scientific and reasonable internal process and very good material and also built-in high performance AGC control circuit, so as to ensure the stability gain and low distortion. It is the first choice of large and medium-sized two-way CATV transmission network equipment.
Product feature
(1) Forward path adapts import PHILPS or NEC low noise push-pull amplify module or GaAs push-pull module, the output adapts two independent PHILPS or NEC double power amplify module or GaAs amplify module that made to excellent nonlinear index and stability output level; Reverse path adapts PHILIPS return amplify module, low distortion and high SNR.
(2) Plug-in diplexer, plug-in fixed (or adjustable) EQ, fixed (or adjustable) ATT, plug-in output tap and with online testing port that made to more convenience project adjusting.
(3) Built-in optimization high performance AGC control circuit to ensure the circuit signal processing stability. (4) Waterproof aluminum housing, high reliability switch power, strictly anti-thunder system that make sure the equipment can long time stability working under field harsh environment.
Technical data
Item |
Unit |
Parameters |
Forward Path |
Frequency Range |
MHz |
53/85 ~ 860 |
Rated Gain |
dB |
OUT1/2≥38 (@FZ110) |
Min Full Gain |
dB |
≥38 (@FZ110) |
Standard Input Level |
dBμV |
72 |
Standard Output Level |
dBμV |
108 |
Flatness In Band |
dB |
±0.75 |
Noise Figure |
dB |
≤ 10 |
Return Loss |
dB |
≥ 16 |
ATT |
dB |
1-18(Fixed plug,1dB step) (Specify by user ) |
EQ |
dB |
1-15(Fixed plug,1dB step) (Specify by user ) |
C/CTB |
dB |
69 |
Test condition: 79 channels. Output level: 53/550/750MHz, 99/105/108 dBμV. |
C/CSO |
dB |
67 |
AGC Pilot Frequency |
MHz |
168.25 (or named by user) |
AGC Characteristic |
dB |
±4 (Input)/±0.5 (Output) |
Group Delay |
ns |
≤ 10 (112.25 MHz/116.68 MHz) |
Signal to Hum Rate |
% |
< 2 |
Gain Stability |
dB |
-1.0 ~ +1.0 |
Return Path |
Frequency Range |
MHz |
5 ~ 42/65 |
Rated Gain(@FZ110) |
dB |
12 |
16 |
20 |
24 |
Max Output Level |
dBμV |
≥ 110 |
Flatness In Band |
dB |
±0.75 |
Noise Figure |
dB |
≤ 12 |
Return Loss |
dB |
≥ 16 |
Carrier to Second Order Intermodulation Ratio |
dB |
≥ 52 |
Test condition: output level 110dBμV,Test point: F1=10MHz,F2=60MHz, F3=F2-F1=50MHz |
Group Delay |
ns |
≤ 20 (57MHz/59MHz) |
Signal to Hum Rate |
% |
< 2 |
General Characteristic |
Characteristic Impedance |
Ω |
75 |
Test Port |
dB |
-20±1 |
Power Voltage |
V |
A: AC (135 ~ 250) V or B: AC(35 ~ 90) V |
Impulse Withstand Voltage(10/700μs) |
kV |
> 5 |
Power Consumption |
W |
30 |
Dimension |
mm |
289*218*123 |
Block Diagram
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