Icom IC-9100 Instruction Manual - Page 67

Twin Peak Filter

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4 RECEIVE AND TRANSMIT D About RTTY reverse mode Received characters are occasionally garbled when the Mark and Space signals are reversed. This reversal can be caused by incorrect TNC connections, setting or commands. To receive reversed RTTY signals correctly, select the RTTY reverse mode. ➥ In the RTTY mode, hold down [CW/RTTY] for 1 second to select the RTTY reverse mode. • "RTTY-R" appears when the RTTY reverse mode is selected. • Hold down [CW/RTTY] for 1 second again to select the normal mode. D Twin Peak Filter The Twin Peak Filter changes the receive frequency response by boosting 2125 and 2295 Hz for better copying of RTTY signals. q In the RTTY mode, push [MENU] to display the "M1" screen (Menu 1). w Push [RTTY](F-4) to display the "RTTY" screen. e P ush [TPF](F-4) to turn the Twin Peak Filter ON or OFF. r Push [MENU] to return to the previous display. NOTE: When the Twin Peak Filter is in use, the received audio output may increase. This is normal; not a malfunction. Normal 170 Hz 2125 Hz Reverse 2125 Hz 170 Hz Space Mark BFO BFO Space Mark RTTY DEC TPF SET Push RTTY RTTY-TPF ON DEC TPF SET Appears when the Twin Peak filter is turned ON. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 58

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58
4
RECEIVE AND TRANSMIT
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
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18
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21
D
About RTTY reverse mode
Received characters are occasionally garbled when
the Mark and Space signals are reversed. This rever-
sal can be caused by incorrect TNC connections, set-
ting or commands.
To receive reversed RTTY signals correctly, select the
RTTY reverse mode.
➥
In the RTTY mode, hold down [CW/RTTY] for 1 sec
-
ond to select the RTTY reverse mode.
•“RTTY-R” appears when the RTTY reverse mode is se
-
lected.
• Hold down [CW/RTTY] for 1 second again to select the
normal mode.
D
Twin Peak Filter
The Twin Peak Filter changes the receive frequency
response by boosting 2125 and 2295 Hz for better
copying of RTTY signals.
q
In the RTTY mode, push [MENU] to display the “M1”
screen (Menu 1).
w
Push [RTTY](F-4) to display the “RTTY” screen.
e
Push [TPF](F-4) to turn the Twin Peak Filter ON or
OFF.
r
Push [MENU] to return to the previous display.
NOTE:
When the Twin Peak Filter is in use, the re-
ceived audio output may increase. This is normal;
not a malfunction.
Normal
Reverse
170
Hz
170
Hz
2125
Hz
2125
Hz
BFO
BFO
Space
Space
Mark
Mark
DEC
TPF
SET
RTTY
RTTY
RTTY–TPF
ON
DEC
TPF
SET
Appears when the Twin Peak
filter is turned ON.
Push