Detailed Product Description
Indoor Node
GDRT-4
Function and Features:
1. Includes a forward optical receiver with RF out and a reverse path optical transmitter.
2. Forward path frequency range: 53~1000MHz.
3. Reverse path frequency range: 5~42MHz.
4. SC/APC connector for fiber in (forward) and fiber out (reverse).
5. RF output 25dBmV on 75Ω F-connector.
6. Excellent linearity.
7. Extremely low return losses.
8. Extremely good flatness.
9. Low power consumption.
10. Operating with either internal 120VAC supply or external coax powering of 12~15 VDC.
Technical Indicator
No. | Item | Unit | Condition | Min. | Type | Max. |
Downstream Receiver | ||||||
1 | Optical Wavelength | nm |
| 1290 |
| 1600 |
2 | Monitoring Voltage | V/mW |
|
| 1 |
|
3 | Input Optical Power | dBm | f | -6 | 1 | 3 |
4 | Frequency Range | MHZ |
| 53 |
| 1000 |
5 | Flatness | dB | f=53-1000MHZ | - | ±0.5 |
|
6 | Output Return Loss | dB | f=53-1000MHZ | 16 | 18 | - |
7 | Output Level | dBmv | NOTE2 |
| 25 |
|
8 | Optical Input Return Loss | dB |
| 45 | - | - |
9 | CTB | dB | 99chs flat |
|
| -61 |
10 | CSO | dB | 859.25MHZ |
|
| -60 |
11 | Equivalent Noise Input | pA/hz | 55MHZ | - | - | 7 |
Upstream transmitter | ||||||
12 | Optical Wavelength | nm |
| 1290 | 1310 | 1330 |
13 | Output Optical Power | dBm |
| 0.5 | 1 | 3 |
14 | Voltage Detection | V/mW | 1310 |
| 1 |
|
15 | Input Level | dBmv |
|
| 15 |
|
16 | Frequency Range | MHZ |
| 5 |
| 42 |
17 | Flatness | dB | f=542MHZ | - | ±0.5 |
|
18 | Input Return Loss | dB | F=542MHZ | 16 | 18 | - |
19 | Optical Output Return Loss | dB |
| 45 | - | - |
NOTE2:Three frequency modulation testeach laser with 40% modulation index.
Fp=326.25MHz Pp=0.33mW
Fp333.25MHz Pp=0.33mW
Fr=335.25MHz Pr=0.33mW
Measurementfq+fp-fr=324.25MHz
