![](/images/new-backgrounds/1265633/2656333x1.webp)
2STARLINE
Figure 1 illustrates a block diagram of the SG2-DRT-3X.
Figure 1
SG2-DRT-3X block diagram
LF pilot |
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| Filter and |
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generator |
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| clock driver |
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Frame
synchronization
42 MHz | A/D |
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| LPF | converter |
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| Pin | Gain |
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| attenuator | block |
| Laser | ITU laser |
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| driver |
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| RF |
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| detector |
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| LF pilot |
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| generator |
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42 MHz | A/D | 32:1 | 3.1 GHz |
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| LPF | converter | multi- | xoscillator |
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| plexer |
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| Pin | Gain |
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| attenuator | block |
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| RF |
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| detector |
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| LF pilot |
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| generator |
| Microprocessor |
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42 MHz | A/D |
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| LPF | converter |
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| Pin | Gain | ADC in | DAC out |
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| attenuator | block |
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| RF |
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| detector |
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Figure 2 illustrates a top view of the SG2-DRT-3X.
Figure 2
SG2-DRT-3X transmitter
1 |
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OPTICAL |
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A |
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POWER | U |
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(1 V/mW) | L |
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| N |
ALARM
3 4
Digital Return Optical Transmitter
I | I |
N | N |
P | P |
U | U |
T | T |
A | B |
ITU/CH XX WAV XXXX.XX
XXXXXXXXXXX
5