Andrew Type 960 Class I & II Manual de usuario descargar pdf (Pagina 21)

4. If any unit is extracted then display shows as Hardware degraded, if put in then

there will be no alarm on display.

5. If VSWR out then LED on TRE , red LED on SUMA card flashes and warning

alarm of VSWR appears on OMC.

Check BTS status in OMC as OK, Check Add/ delete / Modify BTS from OMC.

Limits of BTS Power and VSWR. - LUCENT

Sl No Where? In Watt In dBm

1 RT O/P 36 45.5 ± 0.5

2 Bay Top – If 2H

Combiner used.

18 42.5

( Loss 3 dB )

3 - If 4H

Combiner used.

9 39.5

( Loss 6 dB )

VSWR: - 1.3 Feeder cable loss: - 4.2 dB / 100 meter at 890 MHz

4.5 dB / 100 meter at 960 MHz

N.B. Please read VSWR in M/W system, Meters are different.

Limits for ALCATEL.

Sr. No Where? In Watt In dBm

1 TRE O/P 40 – 63 46.02 – 47.99

2 Bay Top 13 - 22 41.13 – 43.42

3 ANC Loss 4 -5 dB

4 ANY Loss 3.3 dB

VSWR: - 1.3

ANC (Antenna Network Combiner):-

- For duple Xing the Transmit and Receive path towards common

Antenna.

- Combines O/P of Transmitters.

- It supervises VSWR.

ANY (Antenna Network Unit) :-

- Combines up to four Transmitters into two outputs. Both ANC +ANY

- Normally used when six TREs are installed.

3-1.9 Meters required for Power and VSWR measurement:-

1. Through Watt Meter(Analogue and only for power),

2. Bird antenna tester ( only for VSWR )

3. Site Master ( Digital and for both power & VSWR )

1. Through Watt Meter: - It is a Analogue meter to be operated with 50 Ω Heat sink

Termination and 50 Watt element Type: - 3551with 12048 Directional Watt Meter.

Sl no 2806 Through Watt Meter.VXL Technologies Ltd Faridabad.

400 – 1000 MHz 50 W.

- Bird through Watt Meter Model no APM-16 with 25, 50,100 W

Elements to read the required scale on meter.

- Both will read RT/ TRE power in Watt directly.

1 2 ... 16 17 18 19 20 21 22 23 24 25 26 ... 39 40

Tie Beam 31
Antenna 37

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Andrew Type 960 Class I & II Manual de usuario Pagina 21

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