Remote Gain Control
When the JP18 is set to “R”, it means Remote Gain Control is selected and the gain is controlled by the digital signal of connector CN3 bit D4, D5, D6. The bit pattern and related gain is illustrated as:
CN3
D6 | D5 | D4 | Gain |
0 | 0 | 0 | 0.5 |
0 | 0 | 1 | 1 |
0 | 1 | 0 | 5 |
0 | 1 | 1 | 10 |
1 | 0 | 0 | 50 |
1 | 0 | 1 | 100 |
1 | 1 | 0 | 500 |
1 | 1 | 1 | 1000 |
Local Gain Control
Sw1
1 | 2 | 3 | 4 | Gain |
ON | ON | ON | OFF | 0.5 |
ON | ON | OFF | OFF | 1 |
ON | OFF | ON | OFF | 5 |
ON | OFF | OFF | OFF | 10 |
OFF | ON | ON | OFF | 50 |
OFF | ON | OFF | OFF | 100 |
OFF | OFF | ON | OFF | 500 |
OFF | OFF | OFF | OFF | 1000 |
| 7 |
