... This talk will cover everything inside the dewar and everything downstairs to the backend. ... Standard 300 MHz centered at 1.275 GHz. ... 14 couplers provide calibration . ... There will be a RFI out-of-band bandpass filter. ... Approximate for backends: -10 to -5 dBm over 300 MH, 150-450 MHz. Bob B. To deal with narrow band RFI from, e.g., radars, what possibilities are there for using notched filters? ... What about putting in a filter to block the range below 1300 MHz. ...

... 2.3 Data acquisition Spectra generated by the Multibeam correlator contain the usual structure seen in spectra from other H i instruments: a bandpass spectrum which is the sum of the sky , ground and receiver temperatures multiplied by the product of the filters in the receiver chain; superimposed on this is a noise ... Note also that sources extended much beyond ,40 arcmin can be imaged poorly in HIPASS images because of the bandpass sidelobe effect described in Section 3.3. ...