Epcom EP-TB-4G Manuel de l'utilisateur - Page 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

1900 Band 2

Output Power

Gain

Gain Flatness

VSWR

Figure 10

Figure 11

Figure 12

Uplink

824~849

1710~1785

1920~1980

15±2 dBm

65 ± 3dB

6 - 8 dB

≤2.5

Downlink

869~894

1805~1880

2110~2170

20±2 dBm

70 ± 3dB