HP (Hewlett-Packard) HP 8568B TV Converter Box User Manual


 
3. Sweep Time Accuracy Test (220 ms)
‘Ihble
2-6.
Sweep Time Accuracy, Sweep Times
220
s
[SWEEP TIME)
Marker A Time
Min Measured Max
20 s 3.6 s
4.4 s
200 s
32 s 48 s
Sweep Times 220 ms
14. Sweep times
220
ms are tested without external test equipment
(Alternate Procedure)
by the following procedure.
15. Press
~NSTR PRESET).
Start-Up Time
16. Set @WEEP TIME] according to
Table
2-7. Press MARKER
(j-1.
Measurement
Rotate the DATA knob to place the marker on the left edge of the
CRT display. Key in
CSHIFT)
[my.
17. Press
[SHIFT)
[REsy
three times. The Active Function Block
reads SWEEP GEN followed by a measured sweep time. This is
the start-up time. Record it in
‘Ihble
2-7. The start-up time must
be subtracted from the SWEEP GEN time measured in step 19.
(Adding the start-up time to the
[SWEEP TIME] setting effectively
subtracts it from the SWEEP GEN time.)
18. Press MARKER (OFF).
Sweep Time
19. Press
@?i]
(REST
three times and note the SWEEP GEN
Measurement
reading. The limits for the SWEEP GEN reading are listed in
Table
2-7. (For example, assume the start-up time measured in
step 17 was 700
,US
for a [SWEEP TIME) of 20 ms. The limits for the
SWEEP GEN readings would be 19.3 to 22.7 ms.)
20. Repeat steps 16 to 19 for each sweep time shown in Table 2-7.
SWEEP
-rIME_)
20 ms
50 ms
100 ms
500 ms
1s
10 s
50 s
100 s
150 s
lhble
2-7.
Sweep Time Accuracy, Sweep Times
220
ms
(Alternate Procedure)
Sweep Gen Readout
Min Measured
Max
18.0 ms 22.0 ms
45.0 ms 55.0 ms
90.0 ms
110
ms
450ms
550
ms
900
ms
1.10 ms
9.00 ms 11.0 ms
45.0
ms 55.0 ms
90.0 ms 10.0 ms
20.0 s 80.0 ms
2-12 Performance Tests