HP 5300A - Page 45

Model 5300A
Maintenance
Figure 5-4B. A1U3 Counter, AlU4 Time Base, and A1U5 Control Checks (Continued)
INSERT
TEST 6
OISPLAY SHOULD BE 000007
AT TURN-ON AND 000008 APPROX.
1 SECOND LATER. BY ADJUSTING
THE 5300A SAMPLE RATE TO
%e CW A DISPLAY OF 000009 _
SHOULD BE EVIDENT IN APPROX
10 SECONDS.
INSERT
TEST?
5-40. Test No. 11. Fixed program tests the .1-second
Time Base output. Display should accumulate one
count every second in digit 1 (second from the right).
“C” lamp on.
5-41. Test No. 12. Fixed program tests the 10 msec
Time Base output. Display should accumulate one
count every second in digit 2 (third from the right).
“C” lamp on.
5-42. Diagnostic Test Card “D”
5-43. Insert Test 13 through 16. To use Diagnostic
Test Card “D,” connect the card through the interface
card, HP Part No. 05300-60004, to 5300A mainframe
AlJ! connector. Prior to each test, press RESET.
These tests check U3 and U4 by programming the
time base input codes to,provide Time Base output
signals in decade steps.
| 5-10
CHANGE
US
5-44. Test No. 13. Fixed program tests the 1 msec
Time Base output. Display should accumulate one
count every second in digit 3 (fourth from the right).
“C” Jamp on.
5-45. Test No. 14. Fixed program tests the .1 msec
Time Base output. Display should accumulate one
count every second in digit 4 (fifth from the right).
“C” lamp on.
5-46. Test No. 15. Fixed program tests the 10 ysec
Time Base output. Display should accumulate one
count every second in digit 5 (sixth from the right).
“C” lamp on. * = overflow lamp on after 10 seconds.
5-47. Test No. 16. Fixed program tests the 1 psec
Time Base output. Overflow lamp should light and
remain on after 1 second. “C’’ lamp on.