
UNIDEN 2020
Sid 16 (26)
3-5.
Bandpass Filter Adjustment.
(
1
) Connect test equipments as show in Fig 3-5-1
Fig 3-5-1
Oscilloscope
TP101
Sweep
Generator
J104 (1)
H
V
(
2
) Select BAND SWITCH in order, starting from 15.0 MHZ according to the
chart 3-5-1 and adjust each coil (3-5-1-C) so as to get the assigned wave from on
oscilloscope (3-5-1-B) respectively.
(
3
) After completion of these adjustments, remo ve sweep generator and
oscilloscope. Then, connect RF voltage meter to Pin 1 of J104 and confirm that
meter readings on each band show 0.7 – 1.3V r.m.s.
Chart 3-5-1
A
B
C
BAND
WAVE FORM
COIL
15.0
Fig. 3-5-2
L123, L130
3.5
3-5-3
L124, L131
7.0
3-5-4
L125, L132
14.0
3-5-5
L126, L133
21.0
3-5-6
L127, L134
28.0
3-5-7
L128, L135
28,5
3-5-8
L129, L136
Содержание 2020
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