Fluke 93 - Page 103

CALIBRATfON
ADJUSTMENT PROCEDURE 5-7
Procddure:
A
•
Apply
a square wave with a frequency of 1 kHz, amplitude
3V peak-to-peak (between OV and
+3V)
to
both
channels A and B. Use 500 terminations.
B
•
Turn trimmer
C2207 on the analog A2 PCB to get the best channel
A pulse response on the LCD
(least distorted
waveform). The position ot trimmer
C2207car> be found in section 10: figure 10.3
(A2 PCB layout SMD).
C
•
Turn trimmer C21 07 on the analog A2 PCB
to get the best channel B pulse response on the
LCD, The
positicm of trimmer C2107 can be found In section 10: figure
10.3 (A2 PCB layout
SMD).
D
•
Press the READY
softkey.
H3. Hardware
pulse response of the
*100
attenuation
Purpose: optimal pulse
response of the OO attenuation circuit.
Calibration equipment:
Tektronix PG
506 Square Wave Calibration Generator
Calibration
setup:
Procedure:
A
•
Apply a square wave with a trequency of
1 kHz, amplitude 20V peak-to-peak (between OV and
+20
V)
to tx)th channels
A
and
B. Set the generator to the position 'STD AMPL".
B
•
Turn trimmer
C221 4 on
the analog
A2
PCB
to the best channel A pulse response on
the LCD
(least distorted waveform). The position of trimmer C2214can be found in
section 1 0: figure 1 0.3
(A2 PCB layout SMD).
C
-
Turn trimmer C21 14 on the analog
A2
PCB
to getthe best channel B pulse response
on
the
LCD.
The position
of trimmer C2114 can be found
in section 10: figure 10.3 (A2 PCB layout SMD).
D
-
Press
the READY softkey.