Horizontal System; Check Sweep Timing Accuracy; Check Sweep Magnifier Range; Check Sweep Linearity - Tektronix 213 DMM Instruction Manual

Performance Check-213 Service
C. HORIZONTAL SYSTEM
Equipment Required
1. Time-Mark Generator
2. Sine-Wave Generator
3. Screwdriver
4.
Adapter, Probe
5. Adapter, Banana Plug (2 required)
6. Attenuator, 5X
7.
Termination, Feedthrough
8.
Cable
9. T-Connector
Control Settings
POWER
DMM
VOLTS
VOLTS-mA/DIV
SEC/DIV
INPUT COUPLING
INTENSITY
TRIGGER
LEVEL-SLOPE
VOL TS-mA/DIV VAR
HORl2 MGF VAR
POS
ON
Button out
Button in
.5 (black scale)
.1 m
DC
Minimum for a visible
display
INTL AC AUTO
As desired for a stable
sweep
Cal detent
Cal detent
As required for a visible
display
1. CHECK SWEEP TIMING ACCURACY
a. Connect the probe to the Time-Mark Generator (trig-
ger output jack) with a probe adapter, set the Generator
for a 10
µs
marker output, and adjust the LEVEL-SLOPE
control for a stable display of the markers.
b. Set the Time-Mark Generator and SEC/DIV control
as shown in Table 5-2. The horizontal POS control may
REV. A, JUNE, 1976
need adjustment to align a timing mark with a vertical
graticule line.
c. CHECK-Sweep timing accuracy is 1 marker/division
within 0.4 division over the center 8 divisions.
d. Disconnect the Generator.
TABLE 5-2
Sweep Timing Accuracy
Time-Mark
SEC/DIV Setting
Generator Setting
10
µs 10µ
50
µs
50µ
0.1 ms .1 m
0.2 ms .2 m
1 ms
1m
2 ms
2m
2. CHECK SWEEP MAGNIFIER RANGE
a. Set SEC/DIV at 1 m and the Time-Mark Generator
for 1 ms.
b. Rotate HOR 12 MGF VAR toward fully clockwise.
c. CHECK-HORl2 MGF VAR range for at least 5:1
ratio (1 marker/5 divisions).
d. Return HOR 12 MGF VAR to CAL detent.
3. CHECK SWEEP LINEARITY
a. Set the Time-Mark Generator, SEC/DIV, VOL TS-
mA/DIV, and HORl2 MGF VAR as shown in Table 5-3.
b. CHECK-Linearity over any 2 divisions of the center
8 divisions is within 0 .1 division (5%) excluding the first
1
µs
of the sweep.
5-5