HP4402.book : chapter2.fm 50 Fri Feb 12 15:32:45 1999
Power Meter Operation
Setting Measurement Limits
2-50 HP E4419B User’s Guide
To set the TTL Output:
1. Press , , . The current settings for the
TTL Output are displayed under the , and
softkeys.
2. To select whether the TTL output reflects an overlimit condition,
under limit condition or both, press . Use any of the four
arrow keys to make a selection between , , and
on the pop up menu that appears.
3. To select whether a high or low level TTL output represents a
limits failure, use the softkey to toggle between
and
TTL Outputs can be disabled and re-enabled simply by pressing
.
Checking for Limit Failures
Limit failures are displayed in the appropriate field in the measurement
window on the power meter’s display as shown in Figure 2-14.
Note The same limit fail field is used by both channel and window
limits.
Meas
Setup
Limits TTL Output
TTL Output Limits
Fail O/P
Limits
OVER UNDER
EITHER
Fail O/P High
Low
TTL Output Off On
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