Table 1
Selected operating mode characteristics for the science instruments nominal CCD modes.
| CCD mode | Readout | Readout | Binning |
| frequency | mode | (Ser. × Par.) | |
|
|
|||
| SM | 833 kHz | Full Frame | 2 × 2 |
| AF1 | 400 kHz | Window | 2 × 1 |
| AF | 103 kHz | Window | 1 × 1, 12 × 1 |
| BP | 164 kHz | Window | 1 × 1, 12 × 1 |
| RP | 164 kHz | Window | 1 × 1, 12 × 1 |
| RVS-HRa | 172kHz | Window | 1 × 1, 10 × 1 |
|
|
|||
| CCD mode | System | Charge | TDI gate |
| gain | injection | activation | |
|
|
|||
| SM | low | no | permanent |
| AF1 | low | yes | yes |
| AF | low | yes | yes |
| BP | low | yes | yes |
| RP | low | yes | yes |
| RVS-HR | high | no | no |
Notes.
It was originally planned to also use a low-resolution RVS mode (RVS-LR) for acquisition of fainter spectra. However, its use was discarded at the end of the commissioning phase owing to some small thermal instabilities introduced into the payload as a result of the constant sky-dependent reconfiguring of the detectors.
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