Kenwood TS-990S Service Manual

TS-990S
9
CIRCUIT DESCRIPTION
●
IFA=73M
Frequency: 0.03 ~ 60MHz
SUB RX IFA
SLO1
AD9951 (SDEN1)
USB USB-DATA LSB LSB-DATA CW CW-R PKS PKS-R FSK FSK-R AM
FM
(FM-DATA)
Filter offset 1 +(SDSPFC) +(SDSHIFT ) -(SDSPFC) -(SDSHIFT) +(CW SHIFT) - (CW SHIFT) 00 -(FSK SHIFT/2) -(FSK SHIFT/2) 00
RIT (

SRIT) (

SRIT) (

SRIT) (

SRIT) (

SRIT) (

SRIT) (

SRIT) (

SRIT) (

SRIT) (

SRIT) (

SRIT) (

SRIT)
SUB CAR
IF10M_2.7k +(SCAR1) +(SCAR1) +(SCAR1) +(SCAR1) +(SCAR1) +(SCAR1) +(SCAR1) +(SCAR1) +(SCAR1) +(SCAR1) - -
●
IFB=11M
Frequency: 0.03 ~ 21.5MHz
SUB RX IFB
SLO1
AD9951 (SDEN1)
USB USB-DATA LSB LSB-DATA CW CW-R PKS PKS-R FSK FSK-R
Filter offset 1
+(SDSPFC) +(SDSHIFT) -(SDSPFC) -(SDSHIFT) +(CW SHIFT) - (CW SHIFT) 00 -(FSK SHIFT/2) -(FSK SHIFT/2)
RIT (

SRIT) (

SRIT) (

SRIT) (

SRIT) (

SRIT) (

SRIT) (

SRIT) (

SRIT) (

SRIT) (

SRIT)
SUB CAR
IF11M_2.7k +(SCAR2) +(SCAR2) +(SCAR2) +(SCAR2) +(SCAR2) +(SCAR2) +(SCAR2) +(SCAR2) +(SCAR2) +(SCAR2)
IF11M_500 +(SCAR3) +(SCAR3) +(SCAR3) +(SCAR3) +(SCAR3) +(SCAR3) +(SCAR3) +(SCAR3) +(SCAR3) +(SCAR3)
SLO3
AD9835 (SDEN2)
USB USB-DATA LSB LSB-DATA CW CW-R PKS PKS-R FSK FSK-R AM
FM
(FM-DATA)
Filter offset 1 +(SDSPFC) +(SDSHIFT) -(SDSPFC) -(SDSHIFT) +(CW SHIFT) - (CW SHIFT) 000000
SUB CAR
IF10M_2.7k +(SCAR1) +(SCAR1) +(SCAR1) +(SCAR1) +(SCAR1) +(SCAR1) +(SCAR1) +(SCAR1) +(SCAR1) +(SCAR1) - -
IF11M_2.7k +(SCAR2) +(SCAR2) +(SCAR2) +(SCAR2) +(SCAR2) +(SCAR2) +(SCAR2) +(SCAR2) +(SCAR2) +(SCAR2) - -
IF11M_500 +(SCAR3) +(SCAR3) +(SCAR3) +(SCAR3) +(SCAR3) +(SCAR3) +(SCAR3) +(SCAR3) +(SCAR3) +(SCAR3) - -
(

SRIT): Sub RIT frequency variable amount (–9.99~+9.99kHz)
(FSK SHIFT): FSK shift width frequency (170Hz, 200Hz, 425Hz, 850Hz, and initial value: 170Hz)
(CW SHIFT): CW shift amount
CAR correction: SSB IF-Filter adjustment range
(SCAR1): IF 10.695MHz SSB IF fi lter (2.7kHz) correction value
(SCAR2): IF 11.374MHz, IF fi lter (2.7kHz) correction value
(SCAR3): IF 11.374MHz, IF fi lter (500Hz) correction value
(SDSPFC): Varied with the DSP fi lter set value
(SDSHIFT): DATA mode shift width frequency set value
Table 2 SLO1/SLO3 (When receiving) frequency shift data
●
IF=73M
Frequency: 0.03 ~ 60MHz
TX
TLO1
DDS AD9835 (SDEN3)
USB USB-DATA LSB LSB-DATA CW CW-R PKS PKS-R FSK FSK-R AM
FM (FM-
DATA)
Filter offset 1 +1.5k +1.5k -1.5k -1.5k 0000 -(FSK SHIFT/2) -(FSK SHIFT/2) 00
XIT (

XIT) (

XIT) (

XIT) (

XIT) (

XIT) (

XIT) (

XIT) (

XIT) (

XIT) (

XIT) (

XIT) (

XIT)
CAR *1
IF10M_2.7k +(SCAR1) +(SCAR1) +(SCAR1) +(SCAR1) +(SCAR1) +(SCAR1) +(SCAR1) +(SCAR1) +(SCAR1) +(SCAR1) - -
SLO3
DDS AD9835 (SDEN2)
USB USB-DATA LSB LSB-DATA CW CW-R PKS PKS-R FSK FSK-R AM
FM (FM-
DATA)
Filter offset 1 +1.5k +1.5k -1.5k -1.5k 00000000
CAR
IF10M_2.7k +(SCAR1) +(SCAR1) +(SCAR1) +(SCAR1) +(SCAR1) +(SCAR1) +(SCAR1) +(SCAR1) +(SCAR1) +(SCAR1) - -
(

XIT): XIT frequency variable amount (–9.99~+9.99kHz)
(FSK SHIFT): FSK shift width frequency (170Hz, 200Hz, 425Hz, 850Hz, and initial value: 170Hz)
CAR correction: SSB IF-Filter adjustment range
(CAR1): IF10.695MHz SSB Normal Filter correction value
Table 3 TLO1/SLO3 (When transmitting) frequency shift data

Kenwood TS-990S Specifications

General

Receiver Type	Triple Conversion Superheterodyne
Antenna Tuner	Built-in automatic antenna tuner
DSP	Yes
IF DSP	Yes
Modes	SSB, CW, AM, FM
Display	7-inch TFT color LCD
Weight	25 kg (55.1 lbs)
Antenna Connectors	SO-239
Power Supply	13.8V DC