Service Guide 10-23
8719ET/20ET/22ET Service Key Menus and Error Messages
8719ES/20ES/22ES Analog Bus on OFF
RF Network Analyzers
A11 Phase Lock
5. A11 Gnd (Ground reference)
6. A11 Gnd (Ground reference)
7. A11 Gnd (Ground reference)
8. Swp Err (Phase error voltage)
This node measures the voltage at the output of the phase comparator on the A11 phase
lock assembly. This error voltage corresponds to the difference in frequency between the
divided IF and the 1 MHz reference frequency from the A12 assembly. See Figure 10-4
for a typical display.
Figure 10-4 Node 8: Swp Err, Phase Error Voltage
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