Table 5-7 Gate Terminal According To Probe Test - Keysight U1401B User's And Service Manual

Table 5-7 Gate terminal according to probe test
Pins
1-2
1-3
2-3
You can identify the channel type of a JFET by measuring its drain-source
resistance (R
channel types will switch on under a gate-source voltage (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 kΩ
If R
other hand, if R
JFET.
Keysight U1401B User's and Service Guide
Red/Black
<1 kΩ
<1 kΩ
<1 kΩ
) when it is biased with a constant voltage source. Usually, both
DS
resistor, and connect the black output alligator lead to the black input probe
lead.
increases when V
DS
increases when V
DS
Test leads
Black/Red
<1 kΩ
<1 kΩ
<1 kΩ
is a negative value, then it is an n-channel JFET. On the
GS
is a positive value, then it is a p-channel
GS
Application Examples
Gate
3
2
1
) of 0 V.
GS
5
117