Application Examples
5
U1401B User’s and Service Guide
105
You can identify the channel type of a JFET by measuring
its drain- source resistance (R
DS
) when it is biased with a
constant voltage source. Usually, both channel types will
switch on under a gate- source voltage (V
GS
) of 0 V.
5
Connect the red input probe lead to the drain.
6
Connect the black input probe lead to the source.
7
Connect the red output alligator lead to the gate terminal
through a 100 k
Ω
resistor, and connect the black output
alligator lead to the black input probe lead.
If R
DS
increases when V
GS
is a negative value, then it is an
n- channel JFET. On the other hand, if R
DS
increases when
V
GS
is a positive value, then it is a p- channel JFET.
Table 5-7
Gate terminal according to probe test
Pins
Test leads
Gate
Red/Black
Black/Red
1-2
<1 k
Ω
<1 k
Ω
3
1-3
<1 k
Ω
<1 k
Ω
2
2-3
<1 k
Ω
<1 k
Ω
1
Содержание U1401B
Страница 1: ...Agilent Technologies U1401B Handheld Multi Function Calibrator Meter User s and Service Guide ...
Страница 16: ...XVI U1401B User s and Service Guide Contents ...
Страница 39: ...Getting Started 1 U1401B User s and Service Guide 19 The rear panel at a glance Figure 1 8 The rear panel ...
Страница 46: ...26 U1401B User s and Service Guide 1 Getting Started ...
Страница 64: ...44 U1401B User s and Service Guide 2 Calibrator Output Operations ...
Страница 67: ...Making Measurements 3 U1401B User s and Service Guide 47 Figure 3 1 DC voltage measurement ...
Страница 73: ...Making Measurements 3 U1401B User s and Service Guide 53 Figure 3 4 Surface temperature measurement ...
Страница 104: ...84 U1401B User s and Service Guide 4 Changing the Default Settings ...
Страница 115: ...Application Examples 5 U1401B User s and Service Guide 95 Figure 5 5 Zener diode test ...
Страница 134: ...114 U1401B User s and Service Guide 5 Application Examples Figure 5 16 Verifying a two wire transmitter Red Black ...
Страница 136: ...116 U1401B User s and Service Guide 5 Application Examples Figure 5 17 Verifying a frequency transmitter ...
Страница 146: ...126 U1401B User s and Service Guide 6 Maintenance ...