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WFM 601A, WFM 601E & WFM 601M User Manual
Figure 1–8 shows the Eye Pattern with a good return loss terminator. Figure 1–9
shows the distorted Eye Pattern of a terminator having only 13 dB return loss
(capacitive) at 100 MHz. Terminations with aberrations under 10% are accept-
able.
Figure 1–8: Eye Pattern display of a termination with good return loss
Figure 1–9: Eye Pattern display of a termination with poor return loss
Compatibility of BNC Center Pins. Most video equipment BNC connectors,
whether 50 or 75 W, use a 50 W standard center pin. Some laboratory 75 W BNC
connectors use a smaller diameter center pin. The BNC connectors on the
WFM 601M are designed to work with the 50 W standard (large diameter) center
pins.
Do not use connectors or terminators with the smaller center pins. They could
cause intermittent connections.