JRC JLN-900 Installation And Instruction Manual page 207

4.2.14.18 Menu Vi PHA
Cumulative phase roll compensation in Hz. NOTE: Values beyond 100
Hz are indicated by "++.+" or "--.-". Such large values indicate a
potential hardware problem in the RECEIVER PCB.
VI PHA ±RR.R ±RR.R
±RR.R ±RR.R ±RR.R
9-21