PROSEDURE PENGUKURAN PCS 1900 BERDASAR PADA PM 30

TAHAPAN PENGUKURAN

Tujuan pembagian ini untuk meminimisasi error pengukuran SPA yang dipengaruhi oleh dynamic range SPA.

METODA PENGUKURAN

1. Over the air (daily operational BALMON)*.

1.1 In band PCS 1900 over the air

1.2 Out band PCS 1900 over the air

2. Di dalam shelter (sesuai dengan PM30)**.

2.1 In band PCS 1900 in shelter

2.2 Out band PCS 1900 in shelter

Note :

*Hasil pengukuran 79 dBc.

**Hasil pengukuran 79 dBc untuk 20 Watt & -47 dBm untuk > 20 watt.

1.1 PENGUKURAN IN BAND OVER THE AIR

Perangkat Connector Spesifikasi Jumlah

Antenna YAGI N - Female Min 15 dB 1

Flexible cable N – Male / N - Male 3 meter 2

Adapter connector N – Female to N - Female 1

SPA (incl pre amp) N - Female 1

1.1 CONTOH HASIL PENGUKURAN IN BAND

Setting Keterangan

Frequency center 1980 MHz

Span 20 MHz

RBW 100 KHz

Internal ATT 0

Reference level -10 dBm

Meas set up Average - trace

Result in Band : peak search marker- 23.85 dBm

1.2 PENGUKURAN OUT BAND OVER THE AIR

Perangkat Connector Spesifikasi Jumlah

Antenna YAGI N - Female Min 15 dB 1

Flexible cable N – Male / N - Male 3 meter 2

Filter UMTS 2100 N – Female to N - Female 1

SPA (incl pre amp) N - Female 1

1.2 RESPONSE FILTER UNTUK PENGUKURAN OUT BAND

Insertion loss pada frequncy 1980 MHz = -3.6 dB

1.2 CONTOH HASIL PENGUKURAN OUT BAND

Setting Keterangan

Frequency center 1980 MHz

Span 20 MHz

RBW 100 KHz

Internal ATT 0

Internal pre Amp ON

Reference level -40 dBm

Meas set up Average - trace

Result out Band : Level pada frequency 1980 MHz- 105.43 dBm

ANALISA PENGUKURAN OVER THE AIR

PENGUKURAN HASIL

IN BAND = A -23.85 dBm

OUT BAND = B -105.43 dBm

LOSS FILTER = C 3.6 dB

TOTAL EMISI = A – B - C 78 dBc

PART SPESIFIKASI

Increase level in band

Increase rejection filter Min 50 dB

Reduce Insertion loss filter Max 1 dB

SARAN HASIL PENGUKURAN

2.1 PENGUKURAN IN BAND IN SHELTER

Perangkat Connector Spesifikasi Jumlah

Tapper N - Female 10 dB 1

Flexible cable N – Male / N - Male 3 meter 3

Adapter connector N – Female to N - Female 1

Adapter connector DIN – Male to N - Female 1

Attenuator N – Male to N - Female 40 dB 20 watt 1

Dummy Load N – Male 100 watt 1

SPA (incl pre amp) N - Female 1

2.1 SETTING PENGUKURAN IN BAND IN SHELTER

PART KETERANGAN

Insertion loss tapper & attenuator 56 dB (A)

Frequency center 1980 MHz

Span 20 MHz

RBW 100 KHz

Internal ATT 0 dB (*)

Reference level -10 dBm (*)

Meas set up Max hold - trace

Marker peak search (B)

Analisa in band C = B + A ( ≤ 32 dBm )C > 32 dBm option -47 dBm.

2.2 PENGUKURAN OUT BAND IN SHELTER

Perangkat Connector Spesifikasi Jumlah

Tapper N - Female 10 dB 1

Flexible cable N – Male / N - Male 3 meter 3

FIlter UMTS 2100 N – Female to N - Female IL = 1 dB; Rejection 40 dB 1

Adapter connector DIN – Male to N - Female 1

Attenuator N – Male to N - Female 40 dB 20 watt 1

Dummy Load N – Male 100 watt 1

SPA (incl pre amp) N - Female 1

2.2 SETTING PENGUKURAN OUT BAND IN SHELTER

PART KETERANGAN

Insertion loss tapper & attenuator 56 dB (A)

Frequency center 1980 MHz

Span 20 MHz

RBW 100 KHz

Internal ATT 0 dB (*)

Reference level -50 dBm (*)

Meas set up Max hold - trace

Internal Pre Amp ON

Level result frequency 1980 MHz (D)

Analisa Out band E = D + A

> 20 watt E = -47 dBm

≤ 20 watt ( C – E ) ≥ 79 dBc

ANALISA PENGUKURAN OVER THE AIR

PENGUKURAN HASIL

IN BAND C

OUT BAND D

EMISSION TRESHOLD

OPTION 1

C ≥ 32 dBm Max value D = -47 dBm

OPTION 2

C < 32 dBm C – D ≥ 79 dBc