METRON QA-45, User & Service Manual, Page: 47 / 74

27. Connect a 10V (
±
0.01v) power source to the pacer input. (Last
setting for pacer should be default setting: 500 ohm). Measure
the voltages on pacer module with the multimeter. The follow-
ing values are acceptable:
Test point
- +
Level Maximum
Deviation
TP1 - TP2 +61.04 mV ±
625
µ
V
TP1 - TP3 +244.1 mV
±
2.5 mV
TP1 - TP4 +0.9766 V ±
10 mV
28. Go out of the System Test Menu and choose pacer program
with the slide switch. Go to the SELECT LOAD (F1) and
choose 50 ohm. Connect a ohm meter to the pacer input and
measure the resistance for all load settings. The following val-
ues are acceptable:
Nominal Min. value Max. value
50 ohm 49.5 ohm 50.5 ohm
100 ohm 99 ohm 101 ohm
150 ohm 148.5 ohm 151.5 ohm
200 ohm 198 ohm 202 ohm
300 ohm 297 ohm 303 ohm
400 ohm 396 ohm 404 ohm
500 ohm 495 ohm 505 ohm
600 ohm 594 ohm 606 ohm
700 ohm 693 ohm 707 ohm
800 ohm 792 ohm 808 ohm
900 ohm 892 ohm 909 ohm
1000 ohm 990 ohm 1010 ohm
1100 ohm 1089 ohm 1111 ohm
1200 ohm 1188 ohm 1212 ohm
1300 ohm 1287 ohm 1313 ohm
1400 ohm 1379 ohm 1421 ohm
1500 ohm 1478 ohm 1522 ohm
1600 ohm 1576 ohm 1624 ohm
1700 ohm 1675 ohm 1725 ohm
1800 ohm .1773 ohm 1827 ohm
1900 ohm 1872 ohm 1928 ohm
2000 ohm 1970 ohm 2030 ohm
2100 ohm 2069 ohm 2131 ohm
2200 ohm 2167 ohm 2233 ohm
2300 ohm 2266 ohm 2335 ohm
Open
(43.78 ohm)
43.649 ohm 43.911 ohm
29. Set the pacer load to 50 ohm. Connect a pulse generator to the
pacer input. Check that the measured values: (If the pulse gen-
erator not handle 10V amplitude in 50 ohm, you must scale the
values).
Parameter Value Max. Deviation
Rate: 80 ppm ±
0.5 ppm
Width: 10 ms ±
0.3 ms
Amplitude: 200 mA ±
1.5 mA
Energy: 20.0 mJ
±
2.0 mJ
5