Adjusti Ng Table H.f. Oscillator - Philips PM5324 Instruction Manual

36
Table 1 Adjusting table h.f. oscillator
Pointer a t
Button M H z
( 802/. . ) mark
pressed ( i ndicated
scale)
1
. 1 - . 3
3
. 3 - 1
- 1
1 3
1 0 3
3
1
1 0 30
30 - 80 30
- 1 1 0 7 5
75
. 4
. 4 - . 5
1 0. 3 - 1 1 . 1 1 0. 3
. 3 3
. 1 -
. 3 - 1 1 0
1 3 3
3 - 1 0 1 0
3
1 0 - 30
30 80 80
1 1 0
7 5 - 1 1 0
F i rst check the values in the th i rd row of tabl e 1 in vertical sequence. If the tolerances i n som e ranges are not
met, the begin- and end-val ues of these ranges have to be corrected by mutual adj ustment of L and C - row 4
and 7 - so that the to lerance val ues of the rows 5 and 8 are obtai ned or even l ower than these v a l u es; the
adjustment of every range should end wi th the correction of the capac itor.
Check the compl iance of the frequency response with the marking of the correspond ing scal e at app rox imately
% %
40 and 60 of the range. Compare deviations with the permissib l e tol era nces o f the tech n ical data.
3.5.6.3. HF Amplitude response
- Check the ampl itude accordi ng to 3 . 5 . 6 . 1 .
- Press range button 30-80; rel ease a l l other buttons
- Set the sca l e pointer to mark 80
- Measure the voltage at output H F O U T : 50 m V ± 1 mV
If necessary, adjust with trimmer 538 on u n it 1 to nom i n a l value
- Tu ne the com p l ete range 30 - 80 M H z . Check, that the deviation i s sma l l e r than 3 dB ( m inimum about 3 5 m V )
- Press range button 7 5 - 1 1 0
- Tune the complete range 7 5
3.5.6.4. H F-attenuation
- Press range button 7 5 - 1 1 0
- The sca l e poi nter may be in arbitrary position
- Termi nate output H F O U T with 75
Perm issible Adjusti ng Adjusting
tolerance
tol erance element
..;;; k H z
..;;; k H z
1 . 5 7 6 1
4.5 762
1 5 763
764
45
1 50 765
450 766
750 767
2 768
769
20.6
4.5
1 5
4 5
1 50
450
1 200
1 1 00
761
cp
501
©
- 1 1 0 M H z ; frequency response 35.4
n
Poi nter at
mark
( i nd icated
sca l e )
3
0 . 1
1 0
0.3
1 3
1 0
3
3
1 0
80
30
1 1 0
1 5
0. 1 2
5
51 6
608 �
0
607
609
0
0
769
�� I
(l)
762
C9-@
C
7 6 7
76 5
763 764
C C C
505 507 51 0 51 2
< 50 < 70 m V .
Adjusting Adjusting
element tol!!rance
..;;; k H z
0.3
50 1
503 1
505 3
507 1 0
5 1 0 30
5 1 2 80
5 1 4 20
1 , 6
I
�+�
i
t}' 5
I
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