Wave BDA-ESMR-2/2W-80-AN89R Скачать руководство пользователя страница 4 | Manualshive

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Wave BDA-ESMR-2/2W-80-AN89R Скачать руководство пользователя страница 4

Figure 1

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BDA BLOCK DIAGRAM

BDA-ESMR-2/2W-80-AN89R

1.

Uplink SMR Quadruplexer - has low bandpass insertion loss and high
selectivity.

2.

Downlink Pre-amp - is a low noise amplifier that drives the Downlink MPA
and offers 45dB Gain.

3.

Downlink MPA – is a high power amplifier with an ALC circuit which offers 43dB
Gain.

4.

Uplink MPA – is a medium power amplifier with an ALC circuit which offers
43dB Gain.

5.

Re-Banding Duplexer - is used for when re-banding of the ESMR800 frequency
band occurs, by selecting its switch position.

6.

Uplink Pre-amp - is a low noise amplifier that drives the Uplink MPA and offers
45dB Gain.

7.

Downlink SMR Quadruplexer - has low bandpass insertion loss and high
selectivity.

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Содержание BDA-ESMR-2/2W-80-AN89R

Страница 1: ...INSTALLATION AND OPERATING MANUAL FOR BDA ESMR 2 2W 80 AN89R DUAL BAND BI DIRECTIONAL AMPLIFIER ...

Страница 2: ... 4 ELECTRICAL SPECIFICATIONS 5 MECHANICAL SPECIFICATIONS 6 ENVIRONMENTAL CONDITIONS 6 BDA CONNECTIONS 6 RF EXPOSURE WARNING 6 MECHANICAL OUTLINE DRAWING Figure 2 7 BDA INSTALLATION 8 BDA OPERATION 9 INSIDE LAYOUT AMPLIFIER LOCATION Figure 4 10 CONTROL PANEL ATTENUATOR ADJUSTMENT Figure 5 11 DIAGNOSTICS GUIDE 12 Page 2 ...

Страница 3: ...criber and amplifies and transmits them to the base station For SMR distinct frequency bands ESMR 800 frequency bands are as follows 806 824 MHz for the Uplink and 851 869 MHz for the Downlink SMR 900 frequency bands are as follows 896 901 MHz for the Uplink and 935 940 MHz for the Downlink A quadruplexer isolates the Uplink and Downlink paths in the SMR chain plus a switched internal duplexer wil...

Страница 4: ...A is a high power amplifier with an ALC circuit which offers 43dB Gain 4 Uplink MPA is a medium power amplifier with an ALC circuit which offers 43dB Gain 5 Re Banding Duplexer is used for when re banding of the ESMR800 frequency band occurs by selecting its switch position 6 Uplink Pre amp is a low noise amplifier that drives the Uplink MPA and offers 45dB Gain 7 Downlink SMR Quadruplexer has low...

Страница 5: ...n 34 dBm typical Isolation between Up Down Link 80 dB min Input Output Impedance 50 Ohms VSWR Input Output 1 5 1 max Power Supply 110VAC 0 9 Amp 240VAC 0 45 Amp 50 to 60 Hz The Manufacturer s rated output power of this equipment is for single carrier operation For situations when multiple carrier signals are present the rating would have to be reduced by 3 5 dB especially where the output signal i...

Страница 6: ...to be covered by the BDA The RF connections must be made through cables with characteristic impedance of 50 ohms The isolation between the base station antenna and the mobile antenna should be at least 12 dB higher than the BDA gain Isolation less than this value can cause gain ripple across the band Isolation equal to or less than the BDA gain will give rise to oscillations which will saturate th...

Страница 7: ...IN BUILDING REPEATER ESMR 800 900 G Wave Figure 2 BDA Mechanical Outline Page 7 ...

Страница 8: ... the donor antenna to the BDA connector labeled BASE and the cable from the service antennas to the BDA connector labeled MOBILE 4 Open the access door on the BDA Verify that both of the attenuators are positioned to their maximum setting 30 dB Close the panel 5 Connect the AC power cord to the BDA and then to the power source Verify that the Power ON lamp is illuminated Installation of the BDA is...

Страница 9: ...00 band from uplink 806 824 MHz and downlink 851 869 MHz to uplink 817 824 MHz and downlink 862 869 MHz There is no tuning require just select the narrow SMR position when re banding occurs See Figure 5 ALC Automatic Level Control To minimize intermodulation products each amplifier in the BDA contains an ALC feedback loop The ALC circuit senses the output power and limits both Uplink and Downlink ...

Страница 10: ...Figure 4 Inside Layout Page 10 SMR 800 Uplink MPA ALC circuit inside SMR 900 Uplink MPA ALC circuit inside Control Panel See Figure 5 ...

Страница 11: ...0 30 UPLINK 0 30 DOWNLINK Figure 5 Control Panel Page 11 ESMR Power Switch Re banding Switch Is used to narrow the SMR 800 frequency band at the sites where re banding occurs ...

Страница 12: ...n by the equation Isolation 92 5 20 Log F x D Gt Gr Where F frequency GHz D separation Km Gt transmit antenna gain in the direction of the receive antenna Gr receive antenna gain in the direction of the transmit antenna For example at the SMR frequencies the antenna isolation at 100 m separation is about 71 dB for omni directional antennas 0 dB gain To increase isolation the antennas should have h...

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