. hp :: 3000 :: lan3000 :: 30242-90003 LAN3000 V Diagnostic and Troubleshooting Guide Aug1987 . IC Test #16 is used on coaxial cable LAN connections, and helps identify the faultyunits associated with an external loopback (Test #14) failure. This sectioncontains the following information: • Required Hardware • Functional Description • Using Test 16 Required Hardware For isolating faults with Test 16, the following hardware is required: Part Number Description 30241A Known good MAU or ThinMAU, for ThickLAN or 28641A ThinLAN connections, respectively. 92257B Terminated loopback hoods for ThickLA
. hp :: 3000 :: lan3000 :: 30242-90003 LAN3000 V Diagnostic and Troubleshooting Guide Aug1987 . IC Test #16 is used on coaxial cable LAN connections, and helps identify the faultyunits associated with an external loopback (Test #14) failure. This sectioncontains the following information: • Required Hardware • Functional Description • Using Test 16 Required Hardware For isolating faults with Test 16, the following hardware is required: Part Number Description 30241A Known good MAU or ThinMAU, for ThickLAN or 28641A ThinLAN connections, respectively. 92257B Terminated loopback hoods for ThickLAN or ThinLAN 92227Q connections, respectively. See Figures 4-6 and 4-7. 30241-60009 Known good AUI cable for connecting the MAU/loopback hood. 30241-60002 For Series 39/40/42/52, known good Internal Cable, LANIC card to Junction panel. (Used to distinguishLANIC card faults from internal cable faults.) 30241-60003 For Series 44/48/58/6X/70, known good Internal Cable, LANIC card to Junction panel. (Used to distinguishLANIC card faults from internal cable faults.) LAN Node Diagnostic4-52. Figure 4-6. Loopback Hood on MAU ThinLAN Loopback Hood InstallLoopback Hood ThinMAU Figure 4-7. Loopback Hood on ThinMAU LAN Node Diagnostic4-53 LAN Node Diagnostic4-54 Functional Description Test 16 is an interactive test with its own user interface. After Test 16 isspecified, and the GO command is issued, the following menu is displayed,followed by the Test 16 prompt: HOOD LOOPBACK TEST 1. Test LANIC interface and AUI (25 ohm termination) 2. Test for collision detection (50 ohm termination) 3. Test coax interface (MAU on coaxial cable) 4. Hood Test done, return to main menu Please select test format by number TEST 16 > A test or action is selected by entering its identification number at the Test 16prompt. For example, TEST 16 > ^ will select the LANIC interface and AUI (25 ohm termination) test The tests listed above are described briefly in the following paragraphs. 1. Test LANIC
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