IBM 5500 Operational, Installation, And Maintenance Manual page 121

7.8 × 0.2 = 1.56 µs
1.56 × 99 = 154 m or
1.56 × 324.7 = 507 ft
0.5 V
A=20 µs
B=0.2 µs
0
Figure 52: Shorted Cable
Figure 53 is the same as Figure 52 but with a higher vertical gain (0.2V/div).
The 0 points to start. Notice the two wrinkles 1.3 and 2.5 divisions from the
start. They represent very small mismatches at the workstation connectors.
These mismatches are at a distance of 26 m (85 ft) and 50 m (164 ft) from the
start.
0.2 V
A=20 µs
B=0.2 µs
0
Figure 53: Shorted Cable (Higher Vertical Gain)
Figure 54 is the same as Figure 52 but with an open end. This is an effective
way to measure the length of a cable.
1.3 2.5
7.8
Short
55E1I029
Short
55E1I030
121