HP 8517B manual Sample Diagnostics, Test Results for Path 1 through Path

Troubleshooting the Test Set

Troubleshooting Procedures

Finding the Faulty Compare the results recorded in Table 5-6with the matrix in Table 5-7.Assembly There are 32 possible combinations, twelve of which point to probable

failures. These are shown in Table 5-7.

Table 5-6 Test Results for Path 1 through Path 6

a1	a2	b1	b2	b1 thru	b2 thru
Path1	Path2	Path 3	Path 4	Path5	Path6

Sample Diagnostics

Suppose you have determined that paths 3 and 5 are bad. Paths 1, 2, 4, and 6 are good. Refer to Table 5-7.Notice that the most likely cause for the failure is the b1 sampler.

Table 5-7 Most Probable Failures (B indicates Bad; — indicates Good)

			Path				Most Probable Failure
a1	a2	b1	b2	b1 thru	b2 thru		Assembly, or Description of Condition
Path1	Path2	Path 3	Path 4	Path5	Path6
—	—	—	—	—	—	The HP	8517B test set is not the problem
B	B	B	B	B	B	The source, source cable, VTO, cables from rear
						panel to switch splitter
—	B	—	B	B	—	The switch splitter
B	—	B	—	—	B	The switch splitter
—	—	B	—	B	—	b1 sampler
B	—	—	—	—	—	a1 sampler
—	B	—	—	—	—	a2 sampler
—	—	—	B	—	B	b2 sampler
—	—	B	—	B	B	Port 1 connector or directional coupler
—	—	B	—	B	B	A1, T1
—	—	—	B	B	—	A2, T2
—	—	—	B	B	B	Port 2 connector or directional coupler

HP 8517B S-Parameter Test Set Manual 5-23