up to greater than 10 V. If the ramp waveform is correct, check the A3A8 ramp converter.
Otherwise check the ramp generator on A16.
Isolate Digital Storage Processor Section If HSWP Stays High (SWEEP LED ON)
With the sweep ramp disconnected from
A3A8Jl
and
A3A8TPl
jumpered
to
A3A8TP2,
check RSHS output for the presence of 60 ns low pulses. (The logic probe of the HP 5005A
Signature Analyzer can be used to detect them.) If present, check
A3Al
Trigger. If not, check
the Digital Storage Processor Section.
See
A3Al
Trigger Troubleshooting Procedure
Note that the
A3Al
Trigger assembly also generates and controls the fast sweep timing
(sweeps less than 10 ms).
12 Overall Troubleshooting