This is a low noise amplifier for the relay station of ISDB-T Digital Terrestrial Broadcasting. It achieves a low noise by using GaAs FET.
Main body (LA20SR) mounting type
External size: 214.6(W) x 49(H) x 235(D)mm (Excluding protrusions.)
Mass: 6kg or less
| Bandwidth | Specified bandwidth in the following band | |
| (1) 470MHz to 590MHz | ||
| (2) 550MHz to 690MHz | ||
| (3) 650MHz to 770MHz | ||
| Input level | Rating: -47dBm±20dB/CH | |
| Maximum: -13dBm (All of input) | ||
| Input impedance | 50Ω/TNC type (Non-balance) | |
| Power gain | 27dB | |
| Output level | Rating: -20dBm±20dB/CH | |
| Maximum: +14dBm (All of output) | ||
| Output impedance | 50Ω/TNC type (Non-balance) | |
| Monitor output impedance | 50Ω/BNC type (Non-balance) | |
| Power supply voltage | DC +48V±15% or less | |
| Power consumption | 10W or less | |
| Environmental requirements | Temperature | -10℃ to +45℃ (Range for in-spec) |
| -20℃ to +60℃ (Range for spec restorable) | ||
| Humidity | 45% to 90%RH (Without dew.) | |
| Use conditions | Continuous use | |
| Gain flatness | 1dBp-p or less(Range of specified bandwidth) | |
| 0.5dBp-p or less (Range of channel) | ||
| Noise factor | 2.5dB or less | |
| IM | -55dB or less | |
| Output return loss | 20dB or more | |
| Monitor output level | -20dB±1dB or less(To the output) | |
| Alarm monitoring item | Power failure | The PhotoMOS-relay is closed and outputted, when the internal voltage (+12V) is failed. |
| Alarm interface (At mounting on LA20SR) |
Non-voltage contact outputContact ratingDC24V, 0.1A or less(ALARM)D-sub 15S M2.6 type | |
This is a low noise amplifier to amplify the received power from the antenna in relay station. This two amplifier can be mounted on main body (LA20SR) , and it is possible to correspond to the relay station of dual line (operation and standby) system.
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