| IOC-MIPS_125a | 10150C | |||||||
| Title: | MIPS Transfer Function Test | |||||||
| Objective: | Determination the optimum DC offset to use at the A-to-D Converter | |||||||
| Description: | ||||||||
| including flow / state diagram | At each of 5 DC offset settings (use same as in thermal-vac test), take these dark data: | |||||||
| Put 24um array in dark. | ||||||||
| Take 30 30-second exposures. | ||||||||
| Put 70um array in one one of the dark positions. | ||||||||
| Take 30 10-second exposures. | ||||||||
| Put 160um array in dark. | ||||||||
| Take 30 10-second exposures. | ||||||||
| Place in Schedule: | After aperture door is opened. | |||||||
| (relative to water shed events) | ||||||||
| Required Conditions: | MIPS Scattered light monitor must indicate that MIPS dark levels | |||||||
| are low enough ( <10,000 electrons/sec). | ||||||||
| Assume T=5.5K for now. | ||||||||
| Resources: | ||||||||
| duration (best estimate) | 3 hrs | |||||||
| real time downlink (Y / N) | no | |||||||
| special post event actions (Y / N) | no | |||||||
| Generates 450 DCEs. | ||||||||
| Outcome: | ||||||||
| description | Optimum DC offset level for each array will be known. | |||||||
| can proceed in parallel with other activity | yes so long as high sky background regions are not pointed at. | |||||||
| must outcome be confirmed before next event / test /activity | no | |||||||
| method of confirmation (sensor TLM, data analysis, etc.) | sensor TLM and data analysis | |||||||
| estimate of data turn around if required for confirmation | N/A | |||||||
| Unique or included in planned AOT? | Unique. | |||||||
| Contingency Plan: | ||||||||
| "What if..." | If test fails to execute it must be repeated. If DC offset cannot be changed, circuit analysis will | |||||||
| be needed to understand the fault. | ||||||||
| IOC Critical | Y | |||||||
| References: | ||||||||
| Template last updated: | 9/10/99 | |||||||
| M. Rieke | ||||||||