Configure the 18 cm receiver in total power mode through the NCCS ================================================================= MJG revised 2000/11/23 setup.18tp At PC NCCS1, to the right of the rack in the new tables in the control room, type: whoami [verify current user is "dserver"] If not dserver, exit and logon as dserver. Then configure the receiver by typing: Selector_menu hartrao/select/GPRpre [General purpose/18cm mixer input] 4 [to "write", ie. change the GPM RF input connection] 5 [connect the 18 cm receiver to the GPM RF input] 3 [to "read", ie. check GPM RF input connection] 0 [to exit] Selector_menu hartrao/select/GPRfilt [General Purpose/18cm Filter] 4 ["write", ie. CHANGE the GPM RF filter connection] [select ONE of the following according to which frequency is required] 0 [this selects the 1612 MHz filter] 1 [this selects the 1650 MHz filter] 2 [this selects the 1665 MHz filter] 3 [this selects the 1720 MHz filter] 3 [to "read", ie. check current GPM RF filter connection] 0 [to exit] Selector_menu hartrao/select/GPRpost [160MHz NB IF input selector] 4 [to "write", ie. update NB IF input connection] 5 [connect the GPM output to the NB IF] 3 [to "read", ie. check current NB IF input connection] 0 [to exit] Select polarization (only if using old correlator on HP1000) ------------------------------------------------------------ At rack N29, 160 to 60 MHz IF down converter: select LCP or RCP Set up the local oscillator --------------------------- At rack N08, set the HP8662 synthesizer frequency to: 726 MHz [for 1612 MHz] 745 MHz [for 1650 MHz] 753 MHz [for 1666 MHz] 780 MHz [for 1720 MHz] e.g. press: blue button Frequency 7 2 6 MHz Check the IF signal is present ------------------------------ At rack N28, connect the Spectrum Analyser input to: 160 MHz GPR LCP or RCP Check the IF bandpass for the presence of a signal centred on 160 MHz, and for ripple or interference. If the video signal level is too low ------------------------------------ Take out attenuation at rack N28: "160MHz NB IF Distribution"