Delay Time Accuracy; Delay Time A C C U Ra C Y; Delay Time Position Range; X-Axis Gain Accuracy - Tektronix 2246 1Y Service Manual

c. Position the intensified dot to the leading edge of
the 10th time marker to display the rising edge on
the B Trace (using the k- OR DELAY control).
d. Set:
Horizontal MODE
B INTEN
e. CHECK—that the jitter on the leading edge does
not exceed one division over a two-second inter­
val. Disregard slow drift.

8. Delay Time Accuracy

a. Set:
Horizontal MODE
B SEC/DIV
TRACE SEP
CH 1 POSITION
b. Position the first time marker on the ALT trace to
first vertical graticule line (left-m ost edg e ).
c. Position the intensified zone to full left position
(counterclockwise rotation of the k- OR DELAY
control).
d. CHECK—that the readout is 70.000 ms.
e. Position the intensified zone to the second time
marker and align the leading edge of the time
marker displayed on the B Trace to the left-m ost
(first) graticule line. Using the Readout Accuracy
Limits given in Table 4 -4 , check the delay time
accuracy.
f. Repeat the procedure for the third through 10th
time markers.
REV OCT 1991
Performance Check Procedure—2246 1Y and 2246 Mod A Service
Time Marker
B
Fully CW
(maximum
intensity)

9. Delay Time Position Range

ALT
a. Set tim e-m ark generator for 0.1 ms.
10 |is
Fully CCW
b. Set:
(maximum
downward
A SEC/DIV
position)
B SEC/DIV
To display both
k- OR DELAY control
the ALT
and the B
c. CHECK—that the intensified zone is positioned at
Delayed Traces
or before the second time mark.
d. Turn the k- OR DELAY control clockwise until the
delay readout stops increasing (largest num ber).
e. CHECK—that the intensified dot is positioned at or
after the 99th time marker (located at a Delay
Time of 9.9 ms).
f. Disconnect the tim e-m ark generator from the
2246 1Y or 2246 Mod A.

10. X-Axis Gain Accuracy

a. Set:
Horizontal MODE
Vertical MODE
CH 1 and CH 2
VOLTS/DIV
CH 1 Input COUPLING
CH 2 Input COUPLING
Table 4-4

Delay Time Accuracy

Readout Accuracy Limits
1st 7 0.000 ms
2nd
0.975 ms to 1.025 ms
3rd
1.970 ms to 2.030 ms
4th
2.965 ms to 3.035 ms
5th 3.960 ms to 4.040 ms
6th
4.955 ms to 5.045 ms
7th 5.950 ms to 6.050 ms
6.945 ms to 7.055 ms
9th
7.940 ms to 8.060 ms
10th
8.935 ms to 9.065 ms
1 ms
( S
5
jl
CCW to 70.000
X-Y
CH 2 (CH 1 off)
10 mV
DC
GND
4-21