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Description
2-37
1
2
3
4
5
2.4.5.3
Radio coupling function (duplexer)
The radio function is composed of:
• the LNA function to amplify the RX signal,
• the duplexer function (RX and TX filters),
• the insulator function to protect the PA against reverse inter-modulation,
• the Swrmeter function that provides an alarm during a fault on the antenna, with the
instruction:
- alarm if SWR > 4
- end of alarm if SWR < 2
Figure 2.12
RADIO COUPLING FUNCTION BLOCK DIAGRAM
RADIO COUPLING FUNCTION
CTL
RX out
ANT
TX in
LNA
RX
TX
30dB
50
Ω
Swrmeter
IDR-
IDO
_MC2_
F
O
NC_
RADIO
_S
Y
NO
P_
01_0
1
Содержание CASSIDIAN IDR IDO 3G
Страница 5: ...DEFENDING WORLD SECURITY IDR IDO 3G Technical Manual TMO PS11209BENAB01 07 2012...
Страница 150: ...IDR IDO 3G_MC9_IDR IDO_FAV_PRES_01_01 3 1 2 4 5 7 6 8 9 10 11 15 14 13 12 18 17 16 Plate 6 II IDR IDO 3G FRONT PANEL...
Страница 152: ...1 7 2 3 4 5 IDR IDO 3G_MC9_IDR IDO_3 4 AR OUVERT_PRES_01_01 6 Plate 6 III IDR IDO 3G INTERNAL VIEW...
Страница 154: ...1 2 3 4 5 6 7 8 9 10 11 RIP IDO 3G_MC2_LED_ALIMENTATION_FAV_01_01 Plate 6 IV IDR IDO 3G PRIMARY MAINS OR DC CONVERTERS...
Страница 163: ......
Страница 164: ...MC2 RR APP 00033 02 02 EN...