| Tx Gain Setting | DL-200V | DL-300V | DL-500V |
| 0 | 42 | 64 | 103 |
| 1 | 57 | 85 | 141 |
| 2 | 71 | 107 | 180 |
| 3 | 88 | 131 | 224 |
| 4 | 123 | 182 | 320 |
| 5 | 147 | 218 | 387 |
| 6 | 219 | 323 | 585 |
| 7 | 270 | 408 | (!) |
Important details follow – please click read more to see the full post here.
- Be careful with “Tx Gain” settings and note that what the transducer (XD) sees might be different – see also: https://oshablue.com/doc/flagship-dl01-pulse-voltage/.
- Gain settings above 4 require using the override command in standard firmware and may not function in continuous acquisition (until FW update).
- Voltages are maybe +/- 5VDC or more, depending on circumstances. These are nominal values.
- The voltage that is actually pulsed onto the cable or sent to the XD depends on other board factors, like the output transistors that are installed – and those can vary with supply chain issues and substitutions, even if they are close.
- For example the 200V board assembly, due to supply chain issues, most likely (depending on assembly choices as it turns out) also has output transistors that are adequate generally but for the same voltage have a slightly reduced output.
- GXN500 is configured such that its output is around -323VDC.
- HDL-0108-RSCPT (“RS8”) rapid scan USB board, -200V stock build range almost linearly from about -107V@TxG6 to -200V@TxG26. Below TxG6 output is mostly off, and if TxG was previously higher, there is decay over a few seconds. Above TxG26 the output on the HIVDC module basically tops out at the -200V.