Some more details on the build of h1sush12 IO Chassis Mon 15Dec2025.
Card layout:
| Adnaco Slot | Card | Interface | Notes |
| A1-1 | Timing Card | None | Firmware upgraded in place |
| A1-2 | empty | ||
| A1-3 | ADC0 [100723-09] | NA | Original h2a ADC0, not changed |
| A1-4 | LIGO-DAC0 [S2500460] | [S2500449] | Tested in x7sush12 |
| A2-1 | ADC1 [170619-23] | NA | Original h2a ADC1, not changed |
| A2-2 | LIGO-DAC1 [S2500461] | [SN001] | Tested in x7sush12 |
| A2-3 | LIGO-DAC2 [S2500450] | [SN002] | Tested in x7sush12 |
| A2-4 | ADC2 [110201-08] | [S1102351] | ADC+ribbon+IF were ADC0 in h2b |
| A3-1 | ADC3 [230509-54] | [S1102574] | ADC+ribbon+IF are new, were tested in x7sush12 |
| A3-2 | empty | ||
| A3-3 | empty | ||
| A3-4 | empty | ||
| A4-1 | BIO0 | None | Original h2a BIO0, not changed |
| A4-2 | BIO1 | None | Original h2a BIO1, not changed |
| A4-3 | BIO2 | None | Original h2a BIO2, not changed |
| A4-4 | empty |
h1sush2a's IO Chassis was rebuilt to be h1sush12.
The original ADC0, ADC1, BIO0, BIO1 and BIO2 cards were left in place, including the ADC ribbon cables and interface cards. The BIO field cables had enough slack that they did not need to be disconnected to pull the chassis out from the rack. All the other field cabling was disconnected for the upgrade.
The 7 18bit-DAC cards were removed, along with their ribbon cables and interface cards.
The one ADC from h1sush2b was removed from its chassis and installed as ADC2 (inc. ribbon and IF).
A new ADC was installed for the 4th ADC (JAC), it had been tested in x7sush12.
Following the hardware upgrade we remembered that the LIGO Timing Card needed a Firmware upgrade to run the LIGO-DACs. Marc upgraded h1sush12 Timing Card inplace using the JTAG port connected to his laptop. While he was there, he also upgraded h1susauxh2's Timing Card.
List of the 7 18bit-DACs removed from h1sush2a (in their bus order, DAC0-DAC7):
| 101208-06 |
| 110425-16 |
| 110425-13 |
| 110425-24 |
| 110425-17 |
| 101208-38 |
| 101208-72 |
h1sush2b's 2 18bit-DACs and 16bit-DAC were left in place and the chassis remains powered down, as does the MSR computer.