A 10.24-GHz-wide digital spectrometer array system for LMT-FINER: system design and laboratory performance verification
Fuente:
arXiv
Enregistré dans:
| Auteurs principaux: | , , , , , , , , , , , , |
|---|---|
| Format: | Preprint |
| Publié: |
2024
|
| Sujets: | |
| Accès en ligne: | |
| Tags: |
Ajouter un tag
Pas de tags, Soyez le premier à ajouter un tag!
|
| _version_ | 1866911914285596672 |
|---|---|
| author | Hagimoto, Masato Taniguchi, Akio Tamura, Yoichi Okauchi, Norika Kawamoto, Hiroaki Nakajima, Taku Hikosaka, Takumi Harada, Kenichi Taniguchi, Toru Kamazaki, Takeshi Sakai, Takeshi Tanaka, Kunihiko Kawabe, Ryohei |
| author_facet | Hagimoto, Masato Taniguchi, Akio Tamura, Yoichi Okauchi, Norika Kawamoto, Hiroaki Nakajima, Taku Hikosaka, Takumi Harada, Kenichi Taniguchi, Toru Kamazaki, Takeshi Sakai, Takeshi Tanaka, Kunihiko Kawabe, Ryohei |
| contents | For efficient spectroscopic redshift identification of early galaxies in the northern hemisphere, we aim to combine the Large Millimeter Telescope (LMT) with a wide-band heterodyne receiver, FINER, which will cover radio frequencies of 120--360 GHz and offer a 3--21 GHz intermediate frequency (IF) per sideband and polarization. To take full advantage of such wide IFs, we present a novel 10.24-GHz-wide digital spectrometer, DRS4 (Elecs Industry Co., Ltd.). It incorporates 20.48 Gsps samplers with an FPGA-based digital signal processing module. To mitigate the noise contamination from the image sideband, it is equipped with a digital sideband separation function to improve the sideband rejection up to 25 dB. Laboratory performance evaluations show that it exhibits an Allan time of at least ~100 s and a total power dynamic range of at least 7 dB. These results demonstrate its capability of instantaneously wide-band spectroscopy toward high-redshift galaxies with position-switching observations. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2406_07978 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | A 10.24-GHz-wide digital spectrometer array system for LMT-FINER: system design and laboratory performance verification Hagimoto, Masato Taniguchi, Akio Tamura, Yoichi Okauchi, Norika Kawamoto, Hiroaki Nakajima, Taku Hikosaka, Takumi Harada, Kenichi Taniguchi, Toru Kamazaki, Takeshi Sakai, Takeshi Tanaka, Kunihiko Kawabe, Ryohei Instrumentation and Methods for Astrophysics For efficient spectroscopic redshift identification of early galaxies in the northern hemisphere, we aim to combine the Large Millimeter Telescope (LMT) with a wide-band heterodyne receiver, FINER, which will cover radio frequencies of 120--360 GHz and offer a 3--21 GHz intermediate frequency (IF) per sideband and polarization. To take full advantage of such wide IFs, we present a novel 10.24-GHz-wide digital spectrometer, DRS4 (Elecs Industry Co., Ltd.). It incorporates 20.48 Gsps samplers with an FPGA-based digital signal processing module. To mitigate the noise contamination from the image sideband, it is equipped with a digital sideband separation function to improve the sideband rejection up to 25 dB. Laboratory performance evaluations show that it exhibits an Allan time of at least ~100 s and a total power dynamic range of at least 7 dB. These results demonstrate its capability of instantaneously wide-band spectroscopy toward high-redshift galaxies with position-switching observations. |
| title | A 10.24-GHz-wide digital spectrometer array system for LMT-FINER: system design and laboratory performance verification |
| topic | Instrumentation and Methods for Astrophysics |
| url | https://arxiv.org/abs/2406.07978 |