Yaesu Musen 20581X50 HF/50 MHz Transceiver User Manual FTDX1200 Operating Manual

Yaesu Musen Co., Ltd. HF/50 MHz Transceiver FTDX1200 Operating Manual

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Users Manual 4 HTML Version

Users Manual 4

Page 44 FT DX 1200 OPERATING MANUAL

CONVENIENCE FEATURES

RECEIVER OPERATION (FRONT END BLOCK DIAGRAM)

The FTDX1200 includes a wide range of special features to suppress the many types of interference that may be encoun-

WHUHGRQWKH+)EDQGV+RZHYHUUHDOZRUOGLQWHUIHUHQFHFRQGLWLRQVDUHFRQVWDQWO\FKDQJLQJVRRSWLPXPVHWWLQJRIWKH

FRQWUROVLVVRPHZKDWRIDQDUWUHTXLULQJIDPLOLDULW\ZLWKWKHW\SHVRILQWHUIHUHQFHDQGWKHVXEWOHHIIHFWVRIVRPHRIWKH

FRQWUROV7KHUHIRUHWKH IROORZLQJLQIRUPDWLRQ LVSURYLGHG DVD JHQHUDOJXLGHOLQH IRUW\SLFDO VLWXDWLRQVDQG DVWDUWLQJ

point for your own experimentation.

The FTDX1200LQWHUIHUHQFH¿JKWLQJ FLUFXLWU\EHJLQV LQ LWV ³5)´VWDJHV DQG FRQWLQXHVWKURXJKRXW WKH HQWLUHUHFHLYHU

section. FTDX1200DOORZVFRQ¿JXUDWLRQRIWKHIHDWXUHVGHVFULEHGEHORZ

R. FLT ()

7KUHH5RRILQJILOWHUVRIN+]N+]DQGN+]

EDQGZLGWKVDUH SURYLGHGLQ WKH)LUVW ,)ULJKWDIWHU WKH

first mixer. These filters are automatically selected to

provide narrow-band selectivity to protect the following

,)DQG'63VWDJHV7KHDXWRPDWLFDOO\VHOHFWHG¿OWHUPD\

EHPDQXDOO\FKDQJHGE\WKHRSHUDWRULIGHVLUHGIRUVSH-

cial operating circumstances.

CONTOUR Filter

7KH'63 &RQWRXUILOWHUKDVWKHXQLTXHDELOLW\ WRSUR-

vide either a null or a peak in tunable segments of the

receiver passband. You may suppress interference and

H[FHVVLYHIUHTXHQF\FRPSRQHQWVRQDQLQFRPLQJVLJQDO

RU\RXPD\SHDNWKRVHWXQDEOHIUHTXHQF\VHJPHQWV7KH

OHYHORIWKHQXOORUSHDNDQGWKHEDQGZLGWKRYHUZKLFK

LWLVDSSOLHGDUHDGMXVWDEOHYLDWKH0HQX

IF SHIFT

7KHSDVVEDQGFHQWHUIUHTXHQF\RIWKH,)'63¿OWHUPD\

be moved up or down by adjusting this control.

IF WIDTH

7KHZLGWKRIWKH,)'63¿OWHULQJPD\EHDGMXVWHGXVLQJ

this control.

IF NOTCH

7KH,)1RWFK¿OWHULVDKLJK4QRWFK¿OWHUWKDWFDQHOLP-

LQDWHRUVLJQL¿FDQWO\UHGXFHDQLQWHUIHULQJFDUULHU

DNF ()

When multiple interfering carriers are encountered dur-

LQJUHFHSWLRQ WKH'LJLWDO 1RWFK)LOWHU FDQVLJQL¿FDQWO\

reduce the level of these signals.

DNR (Digital Noise Reduction)

7KH'63¶V'LJLWDO 1RLVH5HGXFWLRQ '15IHDWXUHXWL-

OL]HVGLIIHUHQW PDWKHPDWLFDODOJRULWKPVWRDQDO\]H

DQGVXSSUHVVGLIIHUHQWQRLVHSUR¿OHVHQFRXQWHUHGRQWKH

+) 0+] EDQGV &KRRVH WKH VHOHFWLRQ WKDW SURYLGHV

WKHEHVWQRLVHVXSSUHVVLRQDQGDOORZVWKHVLJQDOWRULVH

up out of the noise.

AGC

7KH$*&V\VWHPLVKLJKO\DGDSWDEOHWRFKDQJLQJVLJQDO

DQGIDGLQJFKDUDFWHULVWLFVPDNLQJUHFHSWLRQSRVVLEOH

XQGHUWKHPRVWGLI¿FXOWFRQGLWLRQV

40.455 455

3rd IF

3rd

FRONT END BLOCK DIAGRAM

Page 45FT DX 1200 OPERATING MANUAL

INTERFERENCE REJECTION

ATT

:KHQH[WUHPHO\VWURQJORFDOVLJQDOVRUKLJKQRLVHGHJUDGHVUHFHSWLRQ\RXFDQXVHWKH[ATT]EXWWRQWRLQVHUWRU

G%RI5)DWWHQXDWLRQLQIURQWRIWKH5)DPSOL¿HU

 3UHVV WKH [ATT] button several times to set the de-

VLUHGDWWHQXDWLRQOHYHOSHUWKHFKDUWEHORZ

OFF $WWHQXDWRULV2II

-6dB 7KHLQFRPLQJVLJQDOSRZHULVUHGXFHGE\

G%6LJQDOYROWDJHUHGXFHGE\

-12dB7KHLQFRPLQJVLJQDOSRZHULVUHGXFHGE\

G%6LJQDOYROWDJHUHGXFHGWR

-18dB7KHLQFRPLQJVLJQDOSRZHULVUHGXFHGE\

G%6LJQDOYROWDJHUHGXFHGWR

The selected attenuation level will be indicated in the

$77 FROXPQ RI WKH %ORFN 'LDJUDP 'LVSOD\ RQ WKH

TFT display.

 7R UHVWRUH IXOO VLJQDO VWUHQJWK WKURXJK WKH$WWHQXD-

WRUFLUFXLWDUHDSUHVVWKH[ATT] button to restore the

$77GLVSOD\WRWKH³2))´SRVLWLRQ

ADVICE:

 ,IEDFNJURXQGQRLVHFDXVHVDKLJK6PHWHULQGLFDWLRQRQFOHDUIUHTXHQFLHVSUHVVWKH[ATT] button until the S-meter

GURSVWRDERXW³6´7KLVVHWWLQJRSWLPL]HVWKHWUDGHRIIEHWZHHQVHQVLWLYLW\QRLVHDQGLQWHUIHUHQFHLPPXQLW\$OVR

RQFH\RXKDYHWXQHGLQDVWDWLRQ\RXZDQWWRZRUN\RXPD\ZDQWWRUHGXFHVHQVLWLYLW\IXUWKHUDGGPRUHDWWHQXD-

tion) by pressing the [ATT]EXWWRQWRDKLJKHUVHWWLQJ7KLVUHGXFHVWKHVWUHQJWKRIDOOVLJQDOVDQGQRLVHDQGFDQ

PDNHUHFHSWLRQPRUHFRPIRUWDEOHLPSRUWDQWHVSHFLDOO\GXULQJORQJ462V:KHQORRNLQJIRUZHDNVLJQDOVRQDTXLHW

EDQG\RXZLOOZDQWPD[LPXPVHQVLWLYLW\VRWKH,32VKRXOGEHGLVDEOHGDQGWKH[ATT]EXWWRQVKRXOGEHVHWWR³2))´

7KLVVLWXDWLRQLVW\SLFDOGXULQJTXLHWWLPHVRQIUHTXHQFLHVDERYH0+]DQGZKHQXVLQJDVPDOORUQHJDWLYHJDLQ

receiving antenna on other bands.

[ATT] Button

Page 46 FT DX 1200 OPERATING MANUAL

μ-TUNE FILTER (REQUIRES THE OPTIONAL RF μ TUNING KIT)

7KH5)7XQLQJ.LWSURYLGHVXOWUDVKDUS5)VHOHFWLYLW\IRUWKHIURQWHQGRIWKHWUDQVFHLYHU9HU\KLJK4LVPDGHSRV-

VLEOHE\WKHQDUURZEDQGGHVLJQ7KUHH5)7XQLQJ.LWVDUHDYDLODEOH7KHMTU-160FRYHUVWKH0+]EDQG7KH

MTU-80/40FRYHUVWKHDQG0+]EDQGV7KHMTU-30/20FRYHUVDQG0+]EDQGV

:KHQDQ\RUDOORIWKHWKUHHRSWLRQDOXQLWVDUHFRQQHFWHGWKH\ZLOOEHDXWRPDWLFDOO\DGMXVWHGWRFHQWHURQ\RXURSHUDW-

LQJIUHTXHQF\

7KHQDUURZEDQGZLGWKLVHVSHFLDOO\XVHIXORQWKHORZEDQGVZKHQPDQ\VWURQJ VLJQDOVDUHEHLQJUHFHLYHGYLD19,6

SURSDJDWLRQ1HDU9HUWLFDO,QFLGHQFH6LJQDOVZLWKLQDQDUURZEDQGZLGWK7KHDGGHGSURWHFWLRQIRUWKH5)VWDJHLVHV-

SHFLDOO\KHOSIXOLQSUHYHQWLQJ,0'DQGEORFNLQJ

μ-Tune Operation

 3UHVVDQGKROGLQWKH[MHz/μT] button for one sec-

RQGWRDFWLYDWHWKH7XQH¿OWHU7KH³μ-Tune´ZLOO

appear on the TFT display. The [VFO-B/CLAR]

NQREZRUNVDVWKH781,1*NQRE

ADVICE:

 7KH7XQHFLUFXLWZLOODXWRPDWLFDOO\DOLJQLWVHOI

WRWKHRSHUDWLQJIUHTXHQF\

 5HPHPEHU WKDW 7XQH RQO\ RSHUDWHV RQ WKH 

0+]DQGORZHUEDQGV

 5RWDWHWKH[VFO-B/CLAR] knob to peak the re-

VSRQVHEDFNJURXQGQRLVHRUUHGXFHLQWHUIHUHQFH

ADVICE:

 You may observe the relative peak point of the

7XQH ILOWHULQWKH7XQLQJ2IIVHW,QGLFDWRURQ

WKH9)2% IUHTXHQF\ GLVSOD\ ZKLOH WXQLQJ WKH

[VFO-B/CLAR] knob.

 7KHDPRXQWRIFKDQJHLQWKHFHQWHUIUHTXHQF\

RI WKH 7XQHILOWHUZKHQURWDWLQJWKH [VFO-

B/CLAR] NQRE FDQ EH FRQ¿JXUHG XVLQJ 0HQX

LWHP³045 uTUNE DIAL STEP´

 ,I WKH ȝ7XQH ILOWHU KDV EHHQ PDQXDOO\ DGMXVWHG

DZD\IURPWKHFHQWHUIUHTXHQF\\RXPD\SUHVV

the [CLEAR] button to re-center the filter re-

VSRQVHRQWKHFXUUHQWRSHUDWLQJIUHTXHQF\

 3UHVVDQGKROGLQWKH[MHz/μT] button for one sec-

RQGWRGLVHQJDJHWKH7XQH¿OWHU

ADVICE:

 $OWHUQDWHSUHVVHVRIWKH[MHz/μT] button will switch

WKH7XQH¿OWHUEHWZHHQRQRURII

ADVICE:

<RXPD\FKDQJHWKHLQGLFDWLRQRIWKH7XQLQJ2IIVHW

,QGLFDWRUWRGLVSOD\ WKH7XQHILOWHUFRQWLQXRXVO\

ZKLOHWKH7XQHILOWHULVDFWLYDWHG7KLV LV0HQX

LWHP³010 BAR DISPLAY SELECT´6HHWKH%R[RQ

the next page for details of the setting.

 7KH 7XQH ¿OWHUV DUH WKH PRVW DGYDQFHG VHOHFWLYH

5)SUHVHOHFWRU¿OWHUVHYHULQFRUSRUDWHGLQWRDQ$PD-

WHXU 5DGLR WUDQVFHLYHU 7KH 5) VHOHFWLYLW\ SURYLGHG

INTERFERENCE REJECTION

[MHz/μT] Button

[VFO-B/CLAR] Button

E\7XQHFDQEHRIWUHPHQGRXVYDOXHLQHQVXU-

LQJ TXLHW LQWHUPRGIUHH UHFHSWLRQ HYHQ LQ WKH PRVW

FURZGHG EDQGV RQ D FRQWHVW ZHHNHQG 7KH 7XQH

¿OWHUV SURYLGH 5) VHOHFWLYLW\ RQ WKH RUGHU RI D IHZ

GR]HQN+] DW G% DWWKH H[SHQVHRI DIHZ G% RI

V\VWHP JDLQ RQ EDQGV ZKHUH QRLVH ¿JXUH LV VHOGRP

DQLVVXH<RXZLOOQRWLFHWKDWWKH6PHWHUGHÀHFWLRQ

ZKHQ7XQHLVHQJDJHGLV VOLJKWO\OHVV WKDQZKHQ

LWLVRXWRIWKHFLUFXLWWKLVLVQRUPDO,I\RXUDQWHQQD

system gain is so low that you cannot hear the band

QRLVHZKHQ7XQHLVHQJDJHGKLJKO\XQOLNHO\MXVW

VZLWFKLWRXWWRHOLPLQDWHWKHVOLJKWLQVHUWLRQORVV

TUNING OFFSET INDICATOR

Page 47FT DX 1200 OPERATING MANUAL

INTERFERENCE REJECTION

-TUNE FILTER (REQUIRES THE OPTIONAL RF  TUNING KIT)

 $V\RXWXQHDURXQGRQDQDPDWHXUEDQGZLWKȝ7XQHHQJDJHGWKHPLFURSURFHVVRUDXWRPDWLFDOO\FRPPDQGVWKHVWHS-

SHUPRWRUGULYLQJWKHWRURLGFRUHWRFHQWHUWKH¿OWHURQWKHFXUUHQWRSHUDWLQJIUHTXHQF\+RZHYHU\RXPD\XVHWKH

[VFO-B/CLAR]NQREWRVNHZWKH¿OWHUUHVSRQVHWRRQHVLGHRUWKHRWKHURIWKHRSHUDWLQJIUHTXHQF\WRGHDOZLWK

KHDY\LQWHUIHUHQFHRQRQHVLGH7RUHFHQWHUWKH7XQH¿OWHURQWKHRSHUDWLQJIUHTXHQF\DQGHOLPLQDWHDQ\RIIVHW

press the [CLEAR] button.

Changing the Tuning Offset Indicator

 3UHVVWKH[MENU] EXWWRQWRHQJDJHWKH0HQX

mode.

 5RWDWH WKH[VFO-B/CLAR]NQRERU SUHVVWKH

STEXWWRQWRVHOHFW0HQXLWHP³010 BAR DIS-

PLAY SELECT´

 3UHVVWKH[SELECT] button.

 5RWDWH WKH[VFO-B/CLAR]NQRERU SUHVVWKH

STEXWWRQWRVHOHFW³µTUNE7XQH´UH-

SODFLQJ WKH GHIDXOW ³CW TUNE &:781,1*´

selection).

 3UHVV WKH [SELECT]EXWWRQWKHQSUHVVWKH

[MENU] button to lock in the new setting and

exit to normal operation.

[MENU] Button

[VFO-B/CLAR] Knob

Page 48 FT DX 1200 OPERATING MANUAL

IPO (INTERCEPT POINT OPTIMIZATION)

7KH,32IHDWXUHDOORZVWKHRSHUDWRUWRRSWLPL]HWKHFKDUDFWHULVWLFVRIWKHUHFHLYHUIURQWHQGGHSHQGLQJRQWKHFXUUHQW

noise level and the strength of incoming signals.

3UHVV WKH [IPO]EXWWRQUHSHDWHGO\WRVHWWKHGHVLUHG

FKDUDFWHULVWLFRIWKHUHFHLYHUIURQWHQGDFFRUGLQJWRWKH

chart below.

AMP1$PSOL¿HVWKHLQFRPLQJVLJQDOVXVLQJDORZ

GLVWRUWLRQ5) SUHDPSOL¿HUJDLQ DSSUR[

dB).

AMP2$PSOLILHVWKHLQFRPLQJVLJQDOVXVLQJD

VWDJHORZGLVWRUWLRQ5)SUHDPSOL¿HUWRWDO

JDLQDSSUR[G%

IPO %\SDVVHVWKH5)SUHDPSOL¿HU\LHOGLQJGLUHFW

IHHGWRWKH¿UVWPL[HU

7KHVHOHFWHGUHFHLYHU5)SUHDPSOL¿HUZLOOEHLQGLFDWHG

LQWKH,32FROXPQRIWKH%ORFN'LDJUDP'LVSOD\RQWKH

TFT display.

ADVICE:

 2QWKH0+]DQGORZHUEDQGVLWJHQHUDOO\LVQRW

QHFHVVDU\WRXVHDQ\SUHDPSOL¿HUDWDOOVHOHFWLQJWKH

³,32´SRVLWLRQDV GHVFULEHGDERYHZLOOLQFUHDVH WKH

VWURQJVLJQDOKDQGOLQJFDSDELOLW\RIWKHUHFHLYHUDQG

generally will result in more pleasant reception due

to reduced noise. If you can hear band noise with the

SUHDPSOL¿HUVGLVHQJDJHGWKHQDSUHDPSOL¿HULVJHQ-

erally not needed.

NOTE:

7KH,32IHDWXUH LVDOZD\VRQ³,32´ 1R5)SUHDPSOL-

¿HUEHWZHHQN+]DQG0+]

INTERFERENCE REJECTION

[IPO] Button

Page 49FT DX 1200 OPERATING MANUAL

INTERFERENCE REJECTION

R.FLT (ROOFING FILTERS)

1DUURZEDQG5RR¿QJ)LOWHUVRIN+]N+]N+]EDQGZLGWKVDUHSURYLGHGLQWKH¿UVW,)ULJKWDIWHUWKH¿UVWPL[HU

7KHVH¿OWHUVSURYLGHSURWHFWLRQIRU WKHQGPL[HU'63DQG RWKHUFLUFXLWU\WKDWIROORZDQGFDQGUDPDWLFDOO\LPSURYH

UHFHSWLRQRQDYHU\FURZGHGEDQGGXULQJDFRQWHVWHWF7\SLFDOO\WKH$872VHOHFWLRQPRGHLVVDWLVIDFWRU\IRUPRVW

operating situations.

3UHVV WKH [R.FLT] EXWWRQWRWRJJOH WKH5RRILQJ )LOWHU

selection.

AUTO*1 Æ 3 kHz Æ 6 kHz Æ 15 kHz Æ AUTO .....

 7KH ³$872´ VHOHFWLRQ PRGH VHOHFWV WKH RSWLPXP EDQGZLGWK RI

WKH5RR¿QJ¿OWHUIRUWKHUHFHSWLRQPRGH

 ,Q WKLV FDVH WKH VHOHFWHG EDQGZLGWK LQ WKH 5)/7 FROXPQ RI WKH

%ORFN'LDJUDP'LVSOD\JORZV\HOORZ1RUPDOO\JORZV%OXH

ADVICE:

 ,QWKH$0)0PRGHRQO\WKHN+]5RR¿QJ)LOWHU

LVXWLOL]HG

 $V\RXUHSHDWHGO\SUHVVWKH[R.FLT]EXWWRQWKH

VHOHFWHG5RR¿QJ)LOWHU EDQGZLGWKZLOOEH GLVSOD\HG

LQWKH5)/7FROXPQRIWKH%ORFN'LDJUDP'LVSOD\

RQWKH7)7GLVSOD\GHQRWLQJWKH5RR¿QJ)LOWHUFXU-

rently in use.

 7\SLFDOO\WKLVVHOHFWLRQZLOOEHVHWWR³$872´

QUICK POINT:

7KH³$872´VHOHFWLRQRIWKH5RR¿QJ)LOWHULVEDVHGRQ

WKHRSHUDWLQJPRGH+RZHYHU\RXPD\RYHUULGHWKHDX-

WRPDWLFVHOHFWLRQLIEDQGFRQGLWLons warrant a different

XVXDOO\DWLJKWHUVHOHFWLRQ

[R.FLT] Button

TERMINOLOGY:

$³5RR¿QJ)LOWHU´DVLWVQDPHLPSOLHVSODFHVD³5RRI´

over the receiver IF system bandwidth. Starting at the

¿UVWPL[HUWKH5RR¿QJ¿OWHUSURWHFWVWKHFLUFXLWU\GRZQ-

VWUHDPIURPVWURQJVLJQDOVMXVWDVDURRIRQDKRXVH

protects the contents from rain and snow.

Page 50 FT DX 1200 OPERATING MANUAL

IF NOISE BLANKER (NB) OPERATION

The FTDX1200LQFOXGHVDQHIIHFWLYH,)1RLVH%ODQNHUZKLFKFDQVLJQL¿FDQWO\UHGXFHQRLVHFDXVHGE\DXWRPRWLYHLJQL-

tion systems.

 3UHVVWKH [NB]EXWWRQEULHÀ\ WRUHGXFH short dura-

tion pulse noise VXFK DV IURP VZLWFKLQJ WUDQVLHQWV

DXWRPRELOHLJQLWLRQVDQGSRZHUOLQHV7KH³NB ON´

ZLOODSSHDULQWKHGLVSOD\WRFRQ¿UPWKDWWKH1DUURZ

1%LVRSHUDWLQJ

 3UHVVWKH[NB] button again to reduce longer-dura-

tion man-made pulse noise 7KH ³NBW ON´ ZLOO

DSSHDULQWKHGLVSOD\WRFRQ¿UPWKDWWKH:LGH1%LV

operating.

 ,I GHVLUHG \RX PD\ DGMXVW WKH 1RLVH %ODQNHU OHYHO

YLD 0HQX LWHP ³033 NB LEVEL´ WR WKH SRLQW ZKHUH

the offending noise is best reduced or eliminated.

See box below for details.

 7RHQG1RLVH%ODQNHURSHUDWLRQSUHVVWKH[NB] but-

WRQ RQFH PRUH 7KH ³NB OFF´ ZLOO DSSHDU LQ WKH

GLVSOD\FRQ¿UPLQJWKDWWKH1RLVH%ODQNHULVQRORQ-

ger in operation.

ADVICE:

7KH1RLVH%ODQNHU OHYHOLVWKHVDPH IRUERWK9)2$

DQG9)2%

Adjusting the Noise Blanker Level

 3UHVVWKH[MENU] EXWWRQWRHQJDJHWKH0HQX

mode.

 5RWDWH WKH[VFO-B/CLAR]NQRERU SUHVVWKH

STEXWWRQWRVHOHFW0HQXLWHP³033 NB LEV-

EL´

 3UHVVWKH[SELECT] button

 5RWDWH WKH[VFO-B/CLAR]NQRERU SUHVVWKH

ST button) to the point where the offending

noise is best reduced or eliminated.

 3UHVV WKH [SELECT]EXWWRQWKHQSUHVVWKH

[MENU] button to lock in the new setting and

exit to normal operation.

INTERFERENCE REJECTION

[NB] Button

[MENU] Button

[VFO-B/CLAR] Knob

Page 51FT DX 1200 OPERATING MANUAL

INTERFERENCE REJECTION

CONTOUR CONTROL OPERATION

7KH&RQWRXU¿OWHUV\VWHPSURYLGHVDJHQWOHSHUWXUEDWLRQRIWKH,)¿OWHUSDVVEDQG7KH&RQWRXULVVHWWRHLWKHUVXSSUHVV

RUERRVWVSHFL¿FIUHTXHQF\FRPSRQHQWVDQGWKXVHQKDQFHVWKHVRXQGDQGUHDGDELOLW\RIDUHFHLYHGVLJQDO

 3UHVVWKH [CONT/APF] button to activate the Con-

WRXU ¿OWHU 7KH '63 JUDSKLF GLVSOD\ ZLOO LOOXPLQDWH

DQGWKH FXUUHQW³QXOO´ RU³SHDN´ SRVLWLRQRI WKH

&RQWRXU¿OWHUZLOODSSHDULQWKH&217285LQGLFD

tor on the display.

 5RWDWH WKH [CONT/APF] knob to achieve the most

natural-sounding audio reproduction on the incom-

ing signal.

ADVICE:

 7KH GLVSOD\ ZLOO VKRZ WKH &RQWRXU IUHTXHQF\ IRU 

seconds whenever the [CONT/APF] knob is turned.

 7R FDQFHO &RQWRXU WXQLQJ SUHVV WKH [CONT/APF]

button momentarily.

ADVICE:

 $OWHUQDWHSUHVVHVRI WKH[CONT/APF] button will

VZLWFKWKH&RQWRXU¿OWHUEHWZHHQRQDQGRII

ADVICE:

 7KH&RQWRXU¿OWHUOHYHOHLWKHUDQXOORUDSHDNPD\

EH DGMXVWHG XVLQJ 0HQX LWHP ³107 CONTOUR LEV-

EL´7KH IDFWRU\GHIDXOW VHWWLQJ LV IRUD QXOO RI±

G%

 7KH EDQGZLGWK RYHU ZKLFK WKH &RQWRXU ¿OWHU HIIHFW

LVDSSOLHGPD\ EHDGMXVWHGXVLQJ 0HQXLWHP³108

CONTOUR WIDTH´7KHIDFWRU\GHIDXOWVHWWLQJLV

5HIHUWR)LJXUH³B´ WKLVLOOXVWUDWHVDQ³LQGHQ

WDWLRQ´RIWKH&RQWRXUILOWHULQWKHFHQWHURI

the passband. The Contour filter places a low-

4³QRWFK´ LQ WKHSDVVEDQGSHUWKHVHWWLQJVRI

0HQXLWHPV³107 CONTOUR LEVEL´ DQG ³108

CONTOUR WIDTH´UHIHUHQFHGDERYH&RXQWHU

FORFNZLVHURWDWLRQWRWKHOHIWRIWKH[CONT/

APF] knob causes the notch to move toware

D ORZHUIUHTXHQF\ZLWKLQWKHSDVVEDQGZKLOH

FORFNZLVHURWDWLRQWRWKHULJKWFDXVHVWKHQRWFK

WRPRYH WRZDUGD KLJKHUIUHTXHQF\ ZLWKLQWKH

passband. By removing interference or unwanted

IUHTXHQF\FRPSRQHQWVRIWKHLQFRPLQJVLJQDO

it is possible to make the desired signal rise out

RI WKH EDFNJURXQG QRLVHLQWHUIHUHQFH HQKDQFLQJ

intelligibility.

QUICK POINT:

%\MXGLFLRXVXVHRIWKH&RQWRXU¿OWHUWKH³VKRXOGHU´RIWKHSDVVEDQGUHVSRQVHPD\EHDOWHUHGRUFRPSRQHQWVPD\EH

UHPRYHGIURPZLWKLQWKHSDVVEDQGDOORZLQJWKHGHVLUHGVLJQDOWRULVHDERYHWKHEDFNJURXQGQRLVHDQGLQWHUIHUHQFHLQD

PDQQHUQRWREWDLQDEOHZLWKRWKHU¿OWHULQJV\VWHPV

[CONT/APF] Button

IF BANDWIDTH IF BANDWIDTH IF BANDWIDTH

CONT/APF CONT/APF CONT/APF

[CONT/APF] Knob

A B C

CONTOUR INDICATOR

Page 52 FT DX 1200 OPERATING MANUAL

IF BANDWIDTH

Desired Signal Desired Signal Desired Signal

QRMQRM

IF BANDWIDTH IF BANDWIDTH

SHIFT SHIFT SHIFT

INTERFERENCE REJECTION

IF SHIFT OPERATION (SSB/CW/RTTY/PKT/AM MODES)

,)6+,)7DOORZV\RXWRPRYHWKH'63¿OWHUSDVVEDQGKLJKHURUORZHUZLWKRXWFKDQJLQJWKHSLWFKRIWKHLQFRPLQJVLJ

QDODQGWKXVUHGXFHVRUHOLPLQDWHVLQWHUIHUHQFH%HFDXVHWKHFDUULHUWXQLQJIUHTXHQF\LVQRWYDULHGWKHUHLVQRQHHGWR

UHWXQHWKHRSHUDWLQJIUHTXHQF\WRHOLPLQDWHWKHLQWHUIHUHQFH7KHWRWDOSDVVEDQGWXQLQJUDQJHIRUWKH,)6+,)7V\VWHP

LVN+]

 5RWDWH WKH [SHIFT] knob to the left or right to re-

duce the interference.

ADVICE:

The display will show the shift value of the IF

SHIFT for 3 seconds whenever the [SHIFT] knob is

turned.

ADVICE:

The center position of the IF passband will be memo-

UL]HGLQGHSHQGHQWO\ RQ HDFK9)2VWDFNRI9)2$ DQG

9)2%

5HIHUULQJWR)LJXUH³A´QRWHWKHGHSLFWLRQRIWKH

,)'63¿OWHUDVWKHWKLFNOLQHZLWKWKH[SHIFT]

NQRELQWKHR¶FORFNSRVLWLRQ,Q)LJXUH³B´DQ

interfering signal has appeared inside the original

SDVVEDQG ,Q )LJXUH ³C´ \RX FDQ VHH WKH HIIHFW

of rotating the [SHIFT] knob. The interference

OHYHOLVUHGXFHGE\PRYLQJWKH¿OWHUSDVVEDQGVR

that the interference is outside of the passband.

[SHIFT] Knob

A B C

SHIFT INDICATOR

Page 53FT DX 1200 OPERATING MANUAL

A B C

INTERFERENCE REJECTION

WIDTH (IF DSP BANDWIDTH) TUNING (SSB/CW/RTTY/DATA MODES)

7KH,):,'7+WXQLQJV\VWHPDOORZV\RXWRYDU\WKHZLGWKRIWKH'63,)SDVVEDQGWRUHGXFHRUHOLPLQDWHLQWHUIHUHQFH

0RUHRYHUWKHEDQGZLGWKPD\DFWXDOO\EHexpandedIURPLWVGHIDXOWVHWWLQJVKRXOG\RXZLVKWRHQKDQFHLQFRPLQJVLJ

QDO¿GHOLW\ZKHQLQWHUIHUHQFHRQWKHEDQGLVORZ

 5RWDWHWKH [WIDTH] knob to the left or right to re-

duce the interference.

ADVICE:

 7KH IUHTXHQF\ GLVSOD\ ZLOO VKRZ WKH EDQGZLGWK RI

the IF passband for 3 seconds whenever the [WIDTH]

knob is turned.

[WIDTH] Knob

5HIHUULQJWR)LJXUH³B´\RXFDQVHHWKHGHIDXOW

bandwidth on the SSB mode.

By rotating the [WIDTH]NQREWRWKHOHIW WKH

EDQGZLGWKZLOO QDUURZVHH)LJXUH ³A´ZKLOH

rotation of the [WIDTH] NQRE WRWKHULJKW DV

GHSLFWHG LQ )LJXUH ³C´ ZLOO LQFUHDVH WKH EDQG

width.

A B C

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&:0RGH+]aN+]GHIDXOWN+]

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+]

Using IF SHIFT and WIDTH Together

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interference has appeared both on the high

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[WIDTH]NQREWKHLQWHUIHUHQFHIURP RQHVLGH

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[SHIFT]NQREWRUHSRVLWLRQWKHSDVVEDQG)LJXUH

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ADVICE:

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SHIFT features are the primary tools you should

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additional signal-enhancement benefits on

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VLJQL¿FDQWDGYDQWDJH

WIDTH INDICATOR

IF BANDWIDTH IF BANDWIDTH IF BANDWIDTH

SHIFT SHIFT SHIFT Desired Signal Desired Signal Desired Signal

QRM

IF BANDWIDTH IF BANDWIDTH IF BANDWIDTH

Yaesu Musen 20581X50 HF/50 MHz Transceiver User Manual FTDX1200 Operating Manual

Yaesu Musen Co., Ltd. HF/50 MHz Transceiver FTDX1200 Operating Manual

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