HP 6038A, Service Manual

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Table 3-7. Front Panel RPG Latches and Input Port
(A8U6 = P/N 5080-2160 REV A.00.00, A.00.01 A.00.02, and A.00.04)
Inputs:
Node
Measurement
U11-1 1ABC
U11-2 U12-4,10 Toggling (unstable)
U16-10 9H84
Procedure:
Node
S1 LCL
released U11-13 Lo U11-7, U16-9 Lo U16-8 Hi
S1 LCL depressed U11-13 Hi U11-7, U16-8,9 Toggling
S2 OUTPUT ADJUST released U11-14 Lo U11-7, U16-9 Lo U16-8 Hi
S2 OUTPUT ADJUST depressed U11-14 Hi U11-7, U16-8,9 Toggling
S3 DISPLAY OVP released U11-3 Lo U11-7, U16-9 Lo U16-8 Hi
S3 DISPLAY OVP depressed U11-3 Hi U11-7, U16-8,9 Toggling
S4 DISPLAY SETTINGS released U11-4 Lo U11-7, U16-9 Lo U16-8 Hi
S4 DISPLAY SETTINGS depressed U11-4 Hi U11-7, U16-8,9 Toggling
S5 FOLDBACK released U11-5 Lo U11-7, U16-9 Lo U16-8 Hi
S5 FOLDBACK depressed U11-5 Hi U11-7, U16-8,9 Toggling
U12-5 Node toggles when RPG is rotated clockwise
U12-9 Node toggles when RPG is rotated in either direction
Set scope for dual trace operation, 2V/div, 10 ms/div, normal triggering, and positive edge on channel A.
Connect channel A to U12-3 and channel B to U12-2.
U12-3 Rotate RPG CW
U12-2 Rotate RPG CW
U12-3 Rotate RPG CCW
U12-2 Rotate RPG CCW