If Filter - Kenwood TS-590SG Service Manual
Hf / 50mhz transceiver
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Also See for TS-590SG:
- Instruction manual (96 pages) ,
- Manual (76 pages) ,
- Setting manual (28 pages)
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TS-590SG
IF Filter
In order to thoroughly remove the interference frequen-
cy and components of the image frequency, analog fi lters
corresponding to multiple bandwidths have been placed in
the IF stage in addition to the BPF placed in the front stage.
Crystal fi lters (XF474, XF475) for the fi rst IF (11.374MHz)
are inserted in the RX-1 path where the anti-adjacent in-
terference characteristic is enhanced. MCF (XF301) is
Item
Nominal center frequency
Pass bandwidth
Attenuation bandwidth
Ripple
Insertion loss
Guaranteed attenuation
Center frequency devia-
tion
Terminating impedance
Item
Nominal center frequency
Pass bandwidth
Attenuation bandwidth
Ripple
Insertion loss
Guaranteed attenuation
Center frequency devia-
tion
Terminating impedance
Item
Nominal center frequency
Pass bandwidth
Attenuation bandwidth
Ripple
Insertion loss
Guaranteed attenuation
Center frequency devia-
tion
Terminating impedance
14
CIRCUIT DESCRIPTION
XF301: L71-0656-15
XF474: L71-0657-05
11.374MHz
11.374MHz
±3kHz or more at 6dB
±1.35kHz or more at 6dB
±17.5kHz or less at 60dB
±4kHz or less at 60dB
1dB or less
2dB or less
3dB or less
6dB or less
70dB or more at fo±1MHz
80dB or more at fo±1MHz
±500Hz at 6dB
±150Hz at 6dB
1k // 6pF
900 // 9pF
XF371: L71-0605-05
XF472: L71-0230-15
73.095MHz
10.695MHz
±7.5kHz or more at 3dB
±7.5kHz or more at 3dB
±35kHz or less at 40dB
±25kHz or less at 18dB
1dB or less
0.5dB or less
3dB or less
2dB or less
70dB or more at
fo+(500~1000kHz)
30dB or more at fo±1MHz
70dB or more at
fo–(200~1000kHz)
±1.5kHz at 3dB
-
2.5k // –0.5pF
3k // 2pF
CF591: L72-0998-05
455kHz
±6kHz or less at 6dB
±12.5kHz or less at 50dB
2dB or less
6dB or less
35dB or more at
fo±100kHz
±1.0kHz
2k
Table 6 IF fi lter
inserted for bandwidth capping and delay when NB func-
tion is operating. In the RX-2 path, the following fi lters are
inserted: MCF (XF371) for the fi rst IF (73.095MHz), crystal
fi lter (XF473) for the second IF (10.695MHz) and ceramic
fi lter (CF591) for the third IF (455kHz for FM only).
XF475: L7B-0002-00
11.374MHz
±250Hz or more at 6dB
±0.75kHz or less at 60dB
2dB or less
Within 5±2dB
80dB or more at fo±1MHz
±150Hz at 6dB
100 // 90pF
XF471: L71-0664-05
10.695MHz
±3kHz or more at 6dB
±40kHz or less at 60dB
2dB or less
3dB or less
60dB or more at fo±1MHz
±1kHz at 6dB
1.2k // 6pF
XF473: L71-0569-15
10.695MHz
±1.35kHz or more at 6dB
±300kHz or less at 60dB
2dB or less
6dB or less
60dB or more at
fo±300kHz
±150Hz or less at 6dB
1.2k // 7pF
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