| Description
OPCA-8238C Field Bidirectional AGC Trunk Amplifier is a new high gain amplifier. Adopt mature and optimized circuit design, scientific and rational internal process, high quality materials, and built-in high performance AGC control circuit to ensure the stable gain and low distortion. It's the best choice for large and medium-sized bidirectional CATV transmission network.
Product feature
1. The forward preceding stage adopts the newest high index imported low noise push pull amplifier modules or GaAs push pull modules, output stage adopts high index imported power-double amplifier modules or GaAs amplifier modules. The output level is high and the nonlinear index is good. The backward adopts the newest high index imported return dedicated amplifier modules. The distortion is low and signal to noise ratio is high.
2. It is more convenient to debug, because of plug-in duplex filter, plug-in fixed (or adjustable) equalizer and attenuator, plug-in output splitter and scientific and rational on-line detection ports.
3. Built-in optimized high performance AGC control circuit; make the control more accurate and the link signal working more stable. 4. The equipment can work steadily outdoor under bad environmental condition, because of waterproof aluminium case, high reliability switching power supply and lightning protection system.
Technical data
|
Item |
Unit |
Parameter |
|
Forward Path |
|
Frequency Range |
MHz |
47/85 ~860/1000 |
|
Rated Gain (@FZ110) |
dB |
30 |
34 |
36 |
38 |
|
Min Full Gain(@FZ110) |
dB |
≥30 |
≥34 |
≥36 |
≥38 |
|
Rated Input Level |
dBμV |
72 |
|
Rated Output Level |
dBμV |
106/108 |
|
Flatness in Band |
dB |
±0.75 |
|
Noise Figure |
dB |
≤ 10 |
|
Return Loss |
dB |
≥ 16 |
|
Attenuation |
dB |
1-18 (Fixed insert,1dB stepping, specify by user) |
|
Equilibrium |
dB |
1-15 (Fixed insert,1dB stepping, specify by user) |
|
C/CTB |
dB |
≥69 |
Test condition: 79 channels signal, output level: 53MHz/550MHz/750MHz. |
|
C/CSO |
dB |
≥67 |
99dBuV/105dBuV/108dBuV |
|
AGC Pilot Carrier Frequency |
MHz |
168.25 (or up to users) |
|
AGC Characteristic |
dB |
±4 (Input) /±0.5 (Output) |
|
Group Delay |
ns |
≤ 10 (112.25 MHz/116.68 MHz) |
|
Signal to Hum Ratio |
% |
< 2 |
|
Gain Stability |
dB |
-1.0 ~ +1.0 |
|
Return Path |
|
Frequency Range |
MHz |
5 ~ 42/65 |
|
Rated Gain (@FZ110) |
dB |
12 |
16 |
20 |
24 |
|
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 is 110dBuV, test points: F1=10MHz, f2=60MHz, f3=f2-f1=50MHz |
|
Group Delay |
ns |
≤ 20 (57MHz/59MHz) |
|
Signal to Hum Ratio |
% |
< 2 |
|
General Characteristic |
|
Characteristic Impedance |
Ω |
75 |
|
Test Interface |
dB |
-20±1 |
|
Supply Voltage |
V |
A:AC (135 ~ 250) V, B: AC (35 ~ 90) V |
|
Impulse Withstand Voltage (10/700μs) |
kV |
> 5 |
|
Power Consumption |
W |
22 |
|
Dimensions |
mm |
247*205*123 |
Block Diagram
|
