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EMS
Wireless
EMS
Wireless
EkoMini Manual
33
roll-off point of the filter on specific AMPS channels as shown in Table 8 below. The
units are factory set at switch position B
1
.
Table 8: Cellular B Band Bandpass Filter Switch Positions
Band
Selection for
“B” Band
3-dB Roll-off Begins on AMPS
Channel
Switch 3
Position
Switch 4 Position
B
1
Channel 338 – 880.140 MHz
On
On
B
2
Channel 342 – 880.260 MHz
On
Off
B
3
Channel 346 – 880.380 MHz
Off
On
B
4
Channel 350 – 880.500 MHz
Off
Off
0
-10
-20
-30
-40
Filter Response
879.9
880.0
880.1
880.2 880.3
880.4
880.5
880.6
880.7
880.8 880.9
881.0
Ch. 334
(880.020
MHz)
Ch. 338
(880.140
MHz)
Ch. 342
(880.260
MHz)
Ch. 346
(880.380
MHz)
Ch. 350
(880.500
MHz)
-3 dB
Cellular B Band (lower
portion)
Switch
Position "B1"
Switch
Position "B2"
Switch
Position "B3"
Switch
Position "B4"
Frequency, MHz
Cellular A Band (upper
portion)
Figure 10: Cellular B Band Filter Switch Characteristics