Fluke 125 User Manual page 60

Fluke 125
Users Manual
Figure 4-3 shows the bust health indicator boundaries.
Example:
the high level voltage of a bus must be between +3.0 V
(MIN) and +15.0 V (MAX). Depending on the
measurement result the displayed indicator will be:
If the result is between 4.2 and 13.8V. (10% of
12 V = 1.2 V)
If the result is between 3 V and 4.2 V, or between
13.8 V and 15 V.
If the result is < 3 V or >15 V.
MIN
BAD WEAK
10 %
Figure 4-3. Bus Health Indicator Boundaries
4-6
MAX
GOOD WEAK BAD
80 % 10 %
Table 4-4. F1...F4 Key Functions
Select the Limit Setup function, see page 4-8.
Depending on the bus type select the following
to be displayed:
High-Bias (High, default) or Bias-Low (Low)
voltage.
Low level voltage (L), high level voltage (H), or
high to low level voltage (H-L, default).
High-Bias (High), Bias-Low (Low) , or peak-
peak voltage (Pk-Pk, default).
Bit width ( ) or baud rate (Baud)
Select the distortion aspect to be tested:
jitter (Jitter), overshoot and undershoot
(Overshoot),
amplitude distortion (Amplitude) for AS-i.
Select the Eye-pattern screen mode, see
Viewing the Bus Waveform Screen on page
4-7.