| Description
OPCA-8200(C), OPCA-8200 Field Bidirectional Amplifiers are mainly used for Bidirectional trunk transmission for CATV television image signal, digital TV signal, telephone voice signals and data (or compressed data) signal.
Product feature
1. PHILIPS or MOTOROL a low noise push pull amplifier modules are used as forestage of forward path. PHILIPS or NEC Power-Double gallium arsenide modules are used as output stage. Output level is high and nonlinear index is good.
2. PHILIPS or MOTOROLA return amplifier modules are used as backward path. Its distortion is little and SNR is high.
3. It is more convenient to debug, because of plug-in duplex filters, plug-in fixed (or continuously adjustable) equalizers, plug-in output splitters and scientific and rational on-line detection ports.
4. Optimal high performance Automatic Gain Control (AGC) circuit in OPCA-8200C, OPCA-7200C cause precise control and steady link signal.
5. Optimal high performance Automatic Temperature Compensation (ATC) circuit in OPCA-8200, OPCA-7200 cause precise control and steady link signal.6. The equipment can work steadily outdoor under bad environmental condition, because of waterproof aluminum case, high reliability switching power supply and lightning protection system.
Technical data
|
Item |
Unit |
Parameter OPCA-XXXX-X-XX |
|
8227-C-XX |
8230-C-XX |
8227-XX |
8230-XX |
|
Forward Path |
|
Frequency Range |
MHz |
47/87~860 |
|
Rated Gain |
dB |
27 |
30 |
27 |
30 |
|
Minimum Full Gain |
dB |
≥27 |
≥30 |
≥27 |
≥30 |
|
Rated Input Level |
dBμV |
72 |
|
Rated Output Level |
dBμV |
99 |
102 |
99 |
102 |
|
Flatness in Band |
dB |
±0.75 |
|
Noise Figure |
dB |
≤10 |
|
Return Loss |
dB |
≥16 |
|
C/CTB |
dB |
≥67 |
≥61 |
≥67 |
≥61 |
|
C/CSO |
dB |
≥64 |
≥60 |
≥64 |
≥60 |
|
AGC Pilot Carrier Frequency |
MHz |
168.25 (or user order) |
Without AGC |
|
AGC Characteristic |
dB |
±3 (Input/±0.3Output) |
|
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 ~ 30/65 |
|
Rated Gain |
dB |
12 |
20 |
|
Minimum Full Gain |
dB |
≥12 |
≥20 |
|
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 |
|
Group Delay |
ns |
≤ 20 (57MHz/59MHz) |
|
Signal to Hum Ratio |
% |
<2% |
|
General Characteristic |
|
Characteristic Impedance |
Ω |
75 |
|
Supply Voltage |
V |
A: AC (135 ~ 250) V or B: AC (35 ~ 90) V |
|
Impulse Withstand Voltage(10/700μs) |
kV |
> 5 |
|
Power Consumption |
W |
30 |
|
Dimensions |
mm |
340 (L) x 220 (W) x 160 (H) |
Testing Environment:
1. There should be 93 ways PAL-D television signals in the frequency of 862MHz (112.25～855.25MHz) when test the C/CTB and C/CSO.
2. There should be 3 frequencies as f1=65MHz, f2=63MHz and f3=57MHz when test the "Maximum Output Level" of uplink transmission paths. 3. There should be 3 frequencies as f1=10MHz, f2=60MHz and f3 =50MHzwhen test the of "Carrier to Second-order Inter-modulation ratio" uplink transmission paths in the level of 110 dBμV.
Block Diagram
OPCA-8200C
OPCA-8200
|
