jordankersten
Member level 1
oscilloscope problem
If the 7.5 Volt adjust is at exactly 7.5V, the "dashes" produced by the readout scans across the trace. If you bring the 7.5V adjust lower, it scans faster and faster. If you bring the 7.5V up, the "dashes" scan faster and faster disappearing right around 8 volts. All other voltages check out ok. The 15v supply is almost 16v when 7.5v is exactly 7.5. All other voltages are right on.
Added after 20 minutes:
One more thing: if there are two readout displays on (CH1 and time) there are two sets of dashes that scan across the trace. If you add other things to the readout (CH1 CH2, time, etc.) another set of dashes scans across the trace for everything you add to the readout.
Added after 1 hours 1 minutes:
Also, the speed of these dashes can be controlled by the trigger holdoff. When there is no signal, the dashes go away when the holdoff is at MIN, when there is a triggered signal applied, it is opposite, when holdoff is at MIN the dashes scan through the waveform. When it is turned up to about 10-o-clock, the dashes go away as the wave flickers.
If the 7.5 Volt adjust is at exactly 7.5V, the "dashes" produced by the readout scans across the trace. If you bring the 7.5V adjust lower, it scans faster and faster. If you bring the 7.5V up, the "dashes" scan faster and faster disappearing right around 8 volts. All other voltages check out ok. The 15v supply is almost 16v when 7.5v is exactly 7.5. All other voltages are right on.
Added after 20 minutes:
One more thing: if there are two readout displays on (CH1 and time) there are two sets of dashes that scan across the trace. If you add other things to the readout (CH1 CH2, time, etc.) another set of dashes scans across the trace for everything you add to the readout.
Added after 1 hours 1 minutes:
Also, the speed of these dashes can be controlled by the trigger holdoff. When there is no signal, the dashes go away when the holdoff is at MIN, when there is a triggered signal applied, it is opposite, when holdoff is at MIN the dashes scan through the waveform. When it is turned up to about 10-o-clock, the dashes go away as the wave flickers.