Epcom EP20-TB-2600 Посібник користувача - Сторінка 7
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Figure 9
f. ISO, Self-oscillation Cancellation and Auto Shut-off
Device can detect the real time isolation. If isolation between outdoor and indoor
antennas is insufficient, the "I.S.O" at the middle bottom of the screen will light up and ALC
inside the device will work and automatically attenuate the gain to make it work normally(as
Figure 11).
When severe self-oscillation occurs(isolation between outdoor and indoor antenna is
lower than gain value of 15dB), signal output will automatically shut off to avoid self-oscillation
and causing interference to the BTS. Meanwhile, "I.S.O" at the middle bottom of the screen
will be flashing and Run indicator will be red color(as Figure 12).
In this case, users should turn off device, change the direction and height of the antennas
so that there is enough isolation for the device to run normally, then restart the signal amplifier.
Technical Specification
Items
850 Band 5
Frequency
1700/2100 Band 4
Range
2600 Band 7
Output Power
Gain
Gain Flatness
VSWR
Figure 10
Figure 11
Figure 12
Uplink
824~849
1710~1785
2500~2570
15±2 dBm
65 ± 3dB
8 - 10 dB
≤2.5
6
Downlink
869~894
1805~1880
2620~2690
20±2 dBm
70 ± 3dB