Panasonic MINAS A5 Two-Way Radio User Manual


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5-22
4. Manual Gain Tuning (Basic)
Suppression of Machine Resonance
Notch width and depth
7KHZLGWKRIWKHQRWFKÀOWHULVWKHUDWLRRIWKHZLGWKRI²G%DWWHQXDWLRQIUHTXHQF\EDQG
ZLWK UHVSHFWWR WKH QRWFKIUHTXHQF\ DWLWV FHQWHU ZKHQGHSWK LV DQG WKH YDOXHLV DV
shown in the table below.
7KHQRWFKÀOWHUGHSWKLQGLFDWHV,2UDWLRZKHUHWKHLQSXWDWWKHFHQWHUIUHTXHQF\LVFRP-
SOHWHO\VKXWZLWKVHWXSYDOXHEXWIXOO\UHFHLYHGZLWKVHWXSYDOXH7KHWDEOHEHORZ
VKRZVWKLVYDOXHLQG%RQWKHULJKW
Notch width
Band width/center
frequency
Notch depth I/O ratio [dB]
A4 series
(reference)
A5 series
0 0.41 0.5 0 0 ï
1 0.56 0.59 1 0.01 ï
2 0.71 0.71 2 0.02 ï
3 0.86 0.84 3 0.03 ï
41.011 40.04ï
5 — 1.19 5 0.05 ï
6—1.41 60.06ï
7 — 1.68 7 0.07 ï
8 — 2 8 0.08 ï
9 — 2.38 9 0.09 ï
10 — 2.83 10 0.1 ï
11 — 3.36 15 0.15 ï
12 — 4 20 0.2 ï
13 — 4.76 25 0.25 ï
14 — 5.66 30 0.3 ï
15 — 6.73 35 0.35 ï
16 — 8 40 0.4 ï
17 — 9.51 45 0.45 ï
18 — 11.31 50 0.5 ï
19 — 13.45 60 0.6 ï
20 — 16 70 0.7 ï
80 0.8 ï
90 0.9 ï
100 1 0
Notch filter frequency characteristics
ï30
ï25
ï20
ï15
ï10
ï5
0
5
10
Gain [dB]
10 100 1000
Frequency [Hz]
Depth 0, width 4
Depth 50, width 4
Depth 0, width 8
ï>G%@
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