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Starter Kit Instruction Manual Maintenance 43
8.4 Calibaration procedures
8.4.1 TPG128 calibration
Generalities
The present section describes procedure to be car-
ried out for particular calibration of the TPG128.
Before beginning
[1] Switch the instrument OFF.
[2] Remove the cover (1).
[3] Switch the instrument ON.
! WARNING ! Keep in mind that dur-
ing the calibration, the instrument is alive
(powered on)
Needed material
• 1 set of screwdriver.
• 1 oscilloscope.
• 1 voltmeter.
Procedure calibration
The generator should be calibrated as followed:
[1] Verify the +5 V supply.
[2] During the first test, set all potentiometers
and adjustable capacitors to their medium val-
ues.
[3] Adjust to the potentiometer 50 ns adj
(3) in order to obtain a 500 ns long pulse on
TP2 (2).
[4] Connect an oscilloscope allowing the mea-
surement of the signal’s period on the output
Trig out.
T
P
G
1
2
8
−
T
T
L
P
u
l
se
G
e
n
e
r
a
t
o
r
O
F
F
O
N
P
o
w
e
r
0
.
2
t
o
2
.
2
m
s
0
.
5
t
o
1
0
.
5
m
s
5
t
o
1
0
5
m
s
0
t
o
2
0
0
n
s
−
−
−
−
−
−
−
−
−
P
e
r
i
o
d
−
−
−
−
−
−
−
−
−
−
D
u
r
a
t
i
o
n
−
G
a
t
e
I
N
T
r
i
g
O
U
T
O
u
t
1
O
u
t
2
5
0
o
h
m
s
5
0
o
h
m
s
1
5
0
o
h
m
s
ma
x
6
0
m
A
+
1
2
V
0
V
Fig.33: Removing the top cover
2
3
Fig.34: TPG128 main board