User Manual

ALLGON SYSTEM AB - Proprietary
Technical Specification for PCS Tower Top Power Amplifier [Allgon 9256]
Preliminary
-
Subjected
to change without notice
Rev.pA0
File: 93651
Page 13 (19) 29 Mar 00
3.5.11 TX Bypass Loss (option 7)
TX bypass function is optional.
Measured from ANT to BTS port
Typ. 2.0 dB
Max: 2.6 dB
3.5.12 TX Redundancy & Bypass Operation
In the event of failure of one of the transistors in the power amplifier the gain will drop by
approx. 6dB. In this condition a TX-minor alarm will be generated. If both transistors fail and the
TX Bypass option is installed, the TX-path will be switched to bypass mode and a TX-major
alarm will be issued. Bypass mode will automatically be initiated if DC power to the PA fails.
3.6 R
ECEIVE
P
ATH
P
ARAMETERS
3.6.1 RX Operating Frequency
-See section 2.1
3.6.2 RX Gain
Nominal Gain is defined as [MaxGain(inband) + MinGain(inband)] / 2
13 dB
Optionally reduced in 1 dB steps from 13 to 7 dB.
3.6.3 RX Gain Tolerance
±0.6 dB
3.6.4 RX Gain Ripple
Ripple is defined as [MaxGain(inband) - MinGain(inband)]
±0.5 dB
3.6.5 RX Noise Figure
Measured at Nominal RX gain.
Typ: 1.9 dB
Max: 2.9 dB
3.6.6 RX Bypass Loss ( option 6 )
RX bypass function is optional.
Measured from ANT to BTS port
Typ. 2.2 dB
Max 2.9 dB
3.6.7 RX Input Intercept Point IIP3
Min: +6dBm