16 Installation Note N5222-90131
Description of the Upgrade
Installation Procedure for the Upgrade
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“Step 21. Install the A72 and A73 Bias Tee Combiner Assemblies.”
“Step 22. Assemble the A29 - A32 Test Port Coupler Assemblies.”
“Step 23. Install the LED Boards and Test Port Coupler Assemblies On the
4-Port Test Set Front Plate.”
“Step 24. Install the Bulkhead Connectors in the Test Set Front Plate.”
“Step 25. Install the 4-Port Coupler Plate Assembly to the Deck.”
“Step 26. Remove the Old A11 (x2) Direct Digital Synthesizer (DDS) Assembly
and Cables.”
“Step 27. Assemble the A5 and A8 26.5 GHz Source 1 and 2 Assemblies.”
“Step 28. Install the A8 26.5 GHz Source 2 Assembly.”
“Step 29. Install the *NEW* A11 (x4) Direct Digital Synthesizer (DDS)
Assembly and Cables.”
“Step 30. Connect New Cables to A20 IF Multiplexer (IF MUX) Board.”
“Step 31. Reinstall A70 Low Frequency Extension (LFE) Board Bracket.”
“Step 32. Install the New Mixer Brick (MXB) Cables and Route Cables.”
“Step 33. Reconnect/Connect and Route Low Frequency Extension (LFE)
Cables (8120-5014 (x2) and 8120-5017 (x3)) and the Other Ends of the
Cables Connected to the IF Multiplexer (IF MUX) Board.”
“Step 34. Install the New A70 Low Frequency Extension (LFE) Board.”
“Step 35. Connect/Reconnect A71–A74 Bias-Tee Combiner’s Cables to A70
Low Frequency Extension (LFE) Board and the Other Ends of the New Cables
Connected to the IF Multiplier (IF MUX) Board.”
“Step 36. Install the Test Set Cables and Install Cable Clamps on Ferrite
Beads.”
“Step 37. Secure the Front Panel Bulkhead Connectors.”
“Step 38. Reinstall the A19 Test Set Motherboard.”
“Step 39. Install Cables on the A19 Test Set Motherboard.”
“Step 40. Install/Reinstall the A71–74 Bias-Tee combiner’s Gray Low
Frequency Extension (LFE) DC Bias Cables and Route Cables.”
“Step 41. Install the Other End of the A70 LFE Board Cables to the A11 Direct
Digital Synthesizer (DDS) Assembly Gray Cables.”
“Step 42. Replace the Front Panel’s Lower Dress Panel.”
“Step 43. Reinstall Front Panel Assembly.”
“Step 44. Install the New Lower Front Panel Overlay.”
“Step 45. Install the Front Panel Jumper Cables.”
“Step 46. DC Continuity Test the LFE Board and Test Ports.”