STEP 7
Repeat steps 4-6 for each corresponding RX IF inputs 2, 3 and 4. Refer to Fig 1.4 and Fig 1.5.
TX1 IF to RX2 IF
TX1 IF to RX 3 IF
TX1 IF to RX 4 IF
Figure 1.4
Figure 1.5
STEP 8
Restore equipment to original configuration.
Page 1: ...lacement of any major equipment in the receive chain LNA downconverter IF Test Panel and or any associated cables in the receive path STEP 1 Set the CS6716 modem to Default Configuration and place Modem to Online state a On the modem front panel keypad select ENT for Main Menu then select ON OFFLINE then select OFFLINE to place the modem in the offline state b From the Main Menu select CONFIG then...
Page 2: ... shown in Fig 1 2 Figure 1 2 STEP 5 On the modem front panel keypad Select ENT for Menu select MONITOR then select RSL to display the Receive Signal Level RSL for all four receive channels STEP 6 On the OAC 170D front panel adjust RCVR 1 potentiometer until a reading of 40 dBm is obtained on the CS6716 modem RSL1 display refer to Fig 1 3 NOTE Clockwise CW Increases the level Figure 1 3 ...
Page 3: ...at steps 4 6 for each corresponding RX IF inputs 2 3 and 4 Refer to Fig 1 4 and Fig 1 5 TX1 IF to RX2 IF TX1 IF to RX 3 IF TX1 IF to RX 4 IF Figure 1 4 Figure 1 5 STEP 8 Restore equipment to original configuration ...
Page 4: ... frequency synthesizer receive frequency at least 200 MHz away from the normal receive frequency and at least 100 MHz from the transmit frequency Make sure the HPA is off STEP 2 Set the CS6716 modem to Default Configuration and place Modem to Online state d On the modem front panel keypad select ENT for Main Menu then select ON OFFLINE then select OFFLINE to place the modem in the offline state e ...
Page 5: ...alue i e 74 is lower than 72 Therefore RCVR 2 and RCVR 3 need to be adjusted from 72 down to 74 in fig 1 2 When adjusting the potentiometers Clockwise CW increases the level and Counter Clockwise CCW decreases the Level Figure 1 2 Properly gain equalized system Figure 1 3 STEP 6 On each Down Converter turn the Noise Test Switch to OFF and tune the receiver amplifier converter and frequency synthes...
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