Philips pm2521 - Page 10

07
LIST OF FIGURES
Fig. 1. Basic
build-up of PM2521
4
Fig. 2. Block
diagram PIVI2521
4
Fig. 3.
Measurement flow-chart
...
7
Fig. 4. DC attenuator
.1
8
Fig. 5. AC
attenuator 8
Fig. 6.
Basic
1-V
convertor 9
Fig.
7.
measurements
10
Fig.
8.
Thomson bridge 11
Fig.
9.
Block diagram
-
frequency measurements 12
Fig. 10. Normal
trigger mode 13
Fig.
11.
Special trigger mode 13
Fig. 12. Basic V-l
convertor 14
Fig. 13.
Low-pass active filter 15
Fig. 14. Switching part ADC 15
Fig. 15. Basic
functional blocks of
8035
/mP 17
Fig.
16.
Pin allocation
and functions of 8035/xP 19
Fig.
17.
Mode switch
interrupts
21
Fig.
18.
Block diagram of the control section 24
Fig. 19. Measuring
sequence 26
Fig.
20.
Calibration routine 29
Fig.
21.
Flow-chart internal
test and adjust routine
28
Fig. 22.
Flow-chart display output routine 32
Fig.
23.
DC attenuator
details
33
Fig. 24. AC
attenuator details 34
Fig. 25. I -V
convertor 35
Fig.
26.
mesusrements details
37
Fig. 27.
Temperature bridge 38
Fig. 28.
Frequency measurements 39
Fig.
29. R.M.S.
convertor
41
Fig.
30.
Impedance convertor 42
Fig. 31. Active
filter 43
Fig. 32. V-l
convertor 44
Fig. 33.
Interrupt controller 45
Fig.
34.
Counter input control
47
Fig.
35.
Counter 48
Fig.
36.
Switch
decoding 49
Fig.
37.
Relay/FET control 51
Fig.
38.
Address
decoding 54
Fig.
39.
Memory 55
Fig. 40.
Display interface 56
Fig. 41
.
Removing the top cover 60
Fig. 42. Removing the bottom cover and front 60
Fig. 43.
Removing
the
front
60
Fig. 44.
Front assembly
60
Fig. 45. Removing the
thermal fuse
60
Fig.
45a.
Removing the thermal fuse
60
Fig.
46.
Adjusting elements
61
Fig.
47.
Waveforms
V~
part 74
Fig. 48. Waveforms
trigger-level
part 77
Fig.
49.
Waveform, analog part
80
Fig.
50.
Waveform,
ADC
part
81