Sencore SC61 - Page 5

Secondary user controls ......•.•....•....•.•....•....•....•.......... 28
ASTIGMATISM .............•....•....•.•....•...•••.••••••....... 29
TRACE ROTATOR ...............•....•.•....•...••...••••........ 29
TRACE SAL. __ • __ ..•. ......•....•.......... 29
INVERT SAL .....••..•••••...••..••...••.•........ 29
Rear panel fuses and connectors .....•....•.•....•....•....•.•........ 30
Fuse replacement ...............•....•................•........•. 30
ZAXISINPUT . . _ 3D
Accessory (output) jack ...........................•....•.......... 30
The digital readout. ..................................•....•.......... 30
Digital readout not affected by CRT controls ......•....•.......... 30
Measuring DC volts ..................................•....•.......... 30
Accuracy between channels ....................••....•.......... 31
DC loading ...........................•.•....•....•....•.......... 31
Peaking or nulling signals .............•........................... 31
Measuring over 2000 volts DC ......................•....•.......... 31
Measuring peak·to--peak volts ..........................•...••...•...... 32
Using VPP withoutthe CRT 33
Using the VPP function to set the CRT display 33
Frequency measurements .....................................•...... 33
Frequency accuracy versus resolution 33
Signal levels needed for a stable reading 33
Frequencies below 10 Hz require longer counting time ......•...... 34
Some video frequencies read low .........................•...... 34
The first frequency reading takes from 1 to 3 seconds 34
Removing signal causes last reading to freeze 34
The Delta measurements ......................................•...... 35
Delta peak·to--peak ...........................................•....... 36
Slow sweep speeds require longer l1 PP time ........•....•....... 36
Delta peak·to-peak and video signals ...............•....•.......... 36
Delta TIme measurements ............................•.•••••..•...•.. 37
Measuring duty cycle ................................•.•.......... 37
Measuring the delay between two signals 37
Adjusting a circuit for a desired time 38
Slower sweep speeds produce slower readings ......••.•...•...... 39
Measuring rise time or fall time .......................•............ 39
Using the Delta functions to measure frequency ............••............ 39
Measuring phase shift ..........................•....•............ 40
Frequency ratio tests ............................•...........•....... 41
MAINTENANCE
Service and Calibration .....................................•....... 42
Circuli DescrIption and Calibration Instructions ...............•....... 42
Converting the SC61 from 120 VAC to 220 VAC operation 42
SERVICE AND WARRANTy ..........•....•....•.......... Inside Back Cover