Check Sweep Linearity; Check Internal Trigger - Tektronix 213 DMM Instruction Manual

TABLE 6-4
Sweep Timing Accuracy
Time-Mark
SEC/DIV
VOL TS-mA/DIV
Generator
Setting
Setting
Setting
(black scale)
2
µs 2µ
.1
5
µs
5µ
.2
10µs
10µ
.5
20
µs
20µ
.5
50
µs
50µ
.5
0.1 ms .1 m
.5
0.2 ms
.2m .5
0.5 ms
.5 m .5
1 ms 1 m
.5
2 ms 2m
.5
5 ms 5m
.5
3. CHECK SWEEP LINEARITY
a. Set the Time-Mark Generato·r, SEC/DIV, VOL TS-
mA/DIV, and HOR IZ MGF VAR as shown in Table
6-5.
b. CHECK-Linearity over any two divisions of the
center eight divisions is within 0.1 division
(5%)
exclud-
ing the first 1
µs
of the sweep.
c. Return HOR IZ MGF VAR to the CAL detent.
d. Disconnect the Generator.
4. CHECK INTERNAL TRIGGER
a. Set: VOL TS-mA/D IV
SEC/DIV
INPUT COUPLING
TRIGGER
HORIZ MGF
REV. A, JUNE, 1976
1 (black scale)
.5m
DC
INTL AC AUTO
CAL detent
Calibration-213 Service
SEC/DIV
2µ
.5m
5µ
.5m
TABLE 6-5
Sweep Linearity
Time-Mark VOLTS-mA/
Generator DIV Setting
Setting (black scale)
1
µs
.1
0.2 ms .5
1 µs
. 1
0.1 ms .5
HORIZ MG~ VAR
Setting
CAL detent
CAL detent
Set fully clockwise .
Then adjust coun-
terclockwise to 1
marker/division.
Set fully clockwise.
Then adjust coun-
terclockwise to 1
marker/division.
1
The horizontal POS control may need adjustment to align a
timing mark with a vertical graticule line.
b. Connect the probe to the Sine-Wave Generator with
a dual banana plug to BNC adapter and a probe adapter.
Set the Generator frequency to 1 kHz and adjust the
output amplitude for a 0.5 division display.
c. CHECK-Sweep triggers at some point on both the
positive and negative slope of the LEVEL-SLOPE con-
trol, and free-runs when not triggered.
d. Set TRIGGER to INTL AC NORM.
e. CHECK-Sweep triggers at some point on both the
positive and negative slope of the LEVEL-SLOPE con-
trol, and there is no sweep when not triggered.
f. Set TRIGGER to INTL AC AUTO and SEC/DIV to
2µ_
g. Set the Generator to 1 MHz with an output ampli-
tude of 0.5 division.
h. Repeat steps c through e.
i. Disconnect the Generator.
6-11