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Available spectroscopic modes are listed in the table below.
| Name | Wavelength range (um) | Resolving power | Note |
| N | 7.0-13.5 | 170 | |
| Q | 16.5-26.0 | 110 |
Saturation limits depend on wavelength as shown in the figures below, and the typical levels are summarized in the following table.
 | &ref(): File not found: "saturation_dia_qband.jpg" at page "Observing/mirs_spectroscopy_20230101"; |
| Saturation limit of the N band mode. | Saturation limit of the Q band mode. |
| Name | Saturation limit |
| N | 5 kJy |
| Q |
1-sigma 1-sec sensitivity is shown in the figures below. Since the sensitivity is limited by readout noise (assumed 4000e-/read), it improves with longer 1-frame exposure times.
| &ref(): File not found: "sensitivity_dia_KL_PWV0.3.jpg" at page "Observing/mirs_spectroscopy_20230101"; | &ref(): File not found: "sensitivity_dia_KL_PWV0.7.jpg" at page "Observing/mirs_spectroscopy_20230101"; | &ref(): File not found: "sensitivity_dia_KL_PWV1.2.jpg" at page "Observing/mirs_spectroscopy_20230101"; |
| KL-mode sensitivity at PWV=0.3 mm. | KL-mode sensitivity at PWV=0.7 mm. | KL-mode sensitivity at PWV=1.2 mm. |
| &ref(): File not found: "sensitivity_dia_2.7um_PWV0.3.jpg" at page "Observing/mirs_spectroscopy_20230101"; | &ref(): File not found: "sensitivity_dia_2.7um_PWV0.7.jpg" at page "Observing/mirs_spectroscopy_20230101"; | &ref(): File not found: "sensitivity_dia_2.7um_PWV1.2.jpg" at page "Observing/mirs_spectroscopy_20230101"; |
| 2.7um-mode sensitivity at PWV=0.3 mm. | 2.7umL-mode sensitivity at PWV=0.7 mm. | 2.7um-mode sensitivity at PWV=1.2 mm. |
