Keysight Technologies E4417A Service Manual page 128

No fault found with Channel A Input Zero/CAL
selection. Check user application/implementation.
Figure 6-6 Troubleshooting Guide - TTL Inputs (continued)
Keysight E4416A/E4417A Power Meters Service Guide
meter channels
Apply TTL logic 1 level to RJ45 connector. pin 5 wrt
pin 8. Apply TTL logic 0 pulse to RJ45 connector
pin 6 wrt pin 8. See User's Guide chapter 2 for timing.
Did Channel A
meter single or
Single
dual channel?
Apply TTL logic 1 level to Rmt I/O connector pin 5 wrt pin 8.
Apply TTL logic 0 pulse to Rmt I/O connector pin 6 wrt pin 8.
See User's Guide chapter 2 for timing.
Did Channel B
No fault found with Channel B TTL Input selection.
Check user application/implementation.
A
Did power
zero?
Yes
CAL?
Yes
Is the
Dual
CAL?
Yes
End
Troubleshooting
No
No
No
B
135
6