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PT-8000 A·B·C User Manual
C–49
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O T C H
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O I S E R E D U C T I O N
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O I S E B L A N K E R
14.1 Notch Filter Functions
Two Notch filter of different type are available in the PT-8000. One is working
at 1
st
IF 70.7 MHz – it´s the classical type of manual notch filtering using a
Xtal bridge – the IF-NOTCH. The other one is part of the DSP – it´s an
Automatic Notch Filter (ANF) – here called the DSP NOTCH.
DSP NOTCH and IF-NOTCH may be engaged simultaneously.
Notch filtering is not available in AM and FM. In case NOTCH filtering is active
and modes are changed to AM/FM both NOTCHs will cease operation.
After power on both NOTCH filters are off (Default value).
14.1.1 IF-NOTCH
The IF-NOTCH will be activated by pushing the control IF-
NOTCH which is located as depicted. On the display it is
outlined as NOTCH 2.
•
The display will show NOTCH 2
•
Turning IF-NOTCH will adjust the varable notch
through the passband hence the interference will
be almost nullified.
14.1.2 DSP-NOTCH
Pushing the button NOTCH located in the cluster DSP will activte the
automatic notch filtering. On the display the DSP NOTCH is outlined as
NOTCH 1.
The DSP will now detect even multiple interferences and will cancel them
effectively.
•
DSP NOTCH-LED will be on
•
The display will show NOTCH 1
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Содержание PT-8000
Страница 1: ...HF VHF Transceiver PT 8000 A B C Operating Manual Version 1 0...
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Страница 10: ...A 4 Part A Introduction 1 5 Operating Limitations TBD...
Страница 22: ...C 12 Part C Installation And Operation This page is intentionally blank Part C Installation And Operation...
Страница 46: ...C 36 Part C Installation And Operation...
Страница 80: ...C 70 Part C Installation And Operation Part D Annex 23 SOFTWARE UPDATE TBD...
Страница 81: ...PT 8000A B C User Manual C 71 This page is intentionally blank...
Страница 82: ...C 72 Part C Installation And Operation...