Rx If Filter Settings - Kenwood TS-990S Service Manual

TS-990S
Item
Nominal center frequency
Pass bandwidth
Attenuation bandwidth
Ripple
Insertion loss
Guaranteed attenuation
Center frequency deviation
Terminating impedance
Item
Nominal center frequency
Pass bandwidth
Attenuation bandwidth
Ripple
Insertion loss
Guaranteed attenuation
Center frequency deviation
Terminating impedance
SSB/FM SSB/PSK*2
at Slope Tune [Hz] at VBT [Hz]
LOW CUT HI CUT WIDTH SHIFT
0 1 0 0 0 5 0 1
5 0 1 2 0 0 8 0 1
100 1400 100 1200
200 1600 150 1300
300 1800 200 1400
400 2000 250 1500
500 2200 300 1600
600 2400 400 1700
700 2600 500*3 1800
800 2800 600 1900
900 3000 1000 2000
1000 3400 1500 2100
4000 2000 2210
5000 2200
2400
2600*4
2800
3000
*1 In CW mode, the DSP fi lter width is displayed as 500Hz; however, the DSP fi lter width is actually 600Hz.
*2 LOW CUT: Low-cut frequency; HI CUT: High-cut frequency; WIDTH: Bandwidth; SHIFT: Center frequency (SSB);
SHIFT (L/H): Amount of change from the center frequency (CW); IFBW: Bandwidth with the roofi ng fi lter set to AUTO (default value).
*3 The initial value of PSK mode is 500 Hz.
*4 The initial value of SSB (WIDTH/SHIFT) mode is 2600 Hz.
16
CIRCUIT DESCRIPTION
XF5: L71-0674-05
8.248MHz
±250Hz or more at 6dB
±1.4kHz or less at 60dB
2dB or less
4dB or less
70dB or more at fo±48kHz
Within fo±100Hz
50Ω
CF1: L72-0376-05
455kHz
±4.5kHz or more at 6dB
±10kHz or less at 50dB
2dB or less
6dB or less
35dB or more at fo±100kHz
-
2kΩ
Table 9 (2/2) IF fi lter specifi cations
AM [Hz]
IFBW LOW CUT HI CUT IFBW
0 0 0 2 7 0 0 2 5 . k 6
1 0 0 2 7 0 1 0 0 3 0 . k 6
270 200 4.0k 15k
270 300 5.0k 15k
270
270
500
500
500
2.7k
2.7k
2.7k
2.7k
2.7k
2.7k
2.7k
6k
6k
Table 10 RX IF fi lter settings
XF6: L71-0673-05
8.248MHz
±135kHz or more at 6dB
±400Hz or less at 60dB
2dB or less
6dB or less
70dB or more at fo±48kHz
Within fo±50Hz
50Ω
CF2: L72-0372-05
455kHz
±6kHz or more at 6dB
±112.5kHz or less at 50dB
3dB or less
6dB or less
35dB or more at fo±100kHz
-
2kΩ
CW [Hz]
WIDTH IFBW SHIFT(L) SHIFT(H) WIDTH
k 5 0 2 7 0 8 - 0 0 0
k 8 0 2 7 0 7 - 5 0 5 0
100 270 -700 100
150 270 -650 150
200 270 -600 200
250 270 -550 250
300 500 -500 300
400 500 -450 350
500*1 500 -400 400
600 2.7k -350 450
1000 2.7k -300 500
1500 2.7k -250 550
2000 2.7k -200 600
2500 2.7k -150 650
-100 700
-50 750
800
FSK FSK
FSK [Hz]
tone shift
IFBW 170Hz
2 5 0 2 7 0 2 0
1275Hz
3 0 0 5 0 0 4 2
400 500 850Hz
500 500 170Hz
1000 2.7k 200Hz
2125Hz
1500 2.7k 425Hz
850Hz
Initial value
Center
frequency
1360Hz
0 H z 1 3 7 5 H z
5 H z 1487.5Hz
1700Hz
2210Hz
2225Hz
2337.5Hz
2550Hz