
TM 11-6625-1614-15
PRF is the pulse repetition frequency in pulses per
second (pps).
Suppose, for example:
t
1
=
t
2
=
K =
PRF =
10 microseconds
990 microseconds
0.55
1000 pps
To find K, assuming
/
= 2 kilohms and
t
l=10micro-
s e c o n d s :
R
o
/
t
l
= 2 10° = 0.2. Location 0.2 on the
X axis of the graph shown as Figure 3-6, and reading
K where X and Y axes intersect the unmarked curve. If
the ratio of
R
o
/
t
l
were greater than 1, multiply the
X and Y axes by 10, and use the curve marked ”R
o
/
t
1
and K each X10”.
Solving the expression for the multiplying factor,
Model 410C
3-28. NEGATIVE PULSES.
3-29. In the case of a 10 microsecond negative pulse
(
t
2)
and a pulse repetition frequency (PRF) of 1000 pps,
t
l
would be 990 microseconds. Thus
T
o
/
t
1
would be
approximately 0,
and from the graph it is seen that
K is approximately 0. The expression would then
reduce to
3-30. It can be seen that in the case of negative pulses
of short duration much smaller readings will be ob-
tained for an equivalent positive pulse. As a result,
large multiplying factors must be used and unless the
pulse voltage is large, these measurements may be
impractical.
3-31. MEASURING RESISTANCE (Figure 3-7).
3-32. Before making resistance measurements, power
must be removed f rom the circuit to be tested. Also,
make sure capacitors are discharged to eliminate any
residual voltage.
3-33. MEASURING DC NANO-AMPERE CURRENT
(Figure 3-8).
3-34. The Model 410C can be used to measure nano-
ampere leakage current in transistors and diodes. The
three most sensitive DC voltage measurement ranges
are used to measure DC nano-ampere currents.
.
.
3-4
Содержание 410C
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Страница 9: ...Table 1 1 TM 11 6625 1614 15 Section I Table 1 1 Model 410C 01556 2 1 3 ...
Страница 19: ...TM 11 6625 1614 15 Model 410C Section III F i g u r e 3 2 01556 2 Figure 3 2 DC Voltage Measurements 3 5 ...
Страница 20: ...TM 11 6625 1614 15 Section III Model 410C Figure 3 3 Figure 3 3 DC Current Measurements 3 6 01556 3 ...
Страница 21: ...TM 11 6625 1614 15 Model 410C Section III Model 410C Figure 3 4 AC Voltage Measurements 01556 3 3 7 ...
Страница 22: ...Figure 3 5 TM 11 6625 1614 15 Section III Figure 3 5 Model 410C 3 8 0 1 5 5 6 2 ...
Страница 24: ...TM 11 6625 1614 15 Section III Model 410C Figure 3 7 Figure 3 7 Resistance Measurements 3 10 01556 2 ...
Страница 29: ...Figure 4 3 Model 410C TM 11 6625 1614 15 Section IV Figure 4 3 01556 2 4 3 ...
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Страница 50: ...Table 5 9 Paragraph 5 34 Table 5 10 TM 11 6625 1614 15 Model 410C Section V Table 5 9 01566 2 5 1 6 ...
Страница 53: ...Figure 5 6 1 TM 11 6626 1614 15 Change 1 5 16 1 ...
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Страница 55: ...TM 11 6625 1614 15 Section V Figure 5 8 Figure 5 8 Power Supply Schematic 5 19 ...
Страница 56: ...5 20 TM 11 6625 1614 15 Figure 5 9 Typical Amplifier Waveforms ...
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Страница 62: ...THE METRIC SYSTEM AND EQUIVALENTS ...
Страница 63: ...PIN 016288 000 ...