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 10 (19) 29 Mar 00
ELECTRICAL SPECIFICATION
3.3 A
BSOLUTE
M
AXIMUM
R
ATINGS
The Absolute Maximum Rating is defined as the value of applied signal/power etc. that is guaranteed not
to damage the unit permanently. This applies over the full operating temperature range of the unit.
Parameter MAX MIN Unit
3.1.1 Input DC Voltage (low imp. Source) - -70 V
3.1.2 Reverse Input DC Voltage 75 - V
3.1.3 Input Power on BTS port (TX-band) 40 - dBm
3.1.4 Input Power on ANT port (TX-band) 43 - dBm
3.1.5 Input Power on BTS port (RX-band) 20 - dBm
3.1.6 Input Power on ANT port (RX-band) 20 - dBm
3.1.7 Input Power on ANT port (other bands) 43 - dBm
3.1.8 Input Power on BTS port (other bands) 40 - dBm
3.4 G
ENERAL
P
ARAMETERS
3.4.1 Nominal Impedance
Nominal impedance of all ports: 50Ω
3.4.2 Return Loss
Measured over the tuned Rx and Tx band.
Normal operation: Bypass:
BTS port: > 18 dB BTS port > 12 dB
ANT port: > 18 dB Ant port: > 12 dB
3.4.3 Power Consumption
Max: 130W (2.5A @48V)
Primary Fuse: 4 A Slow
3.4.4 Antenna Supervision (VSWR) (option 5)
This optionally feature monitors the Forward and Reflected power at the ANT port. If calculated
VSWR exceeds the VSWR LIMIT, a VSWR-alarm is issued. The VSWR value below is the
default value and is optionally software changeable from 2:1 to 5:1.
VSWR Return Loss
VSWR LIMIT: 2.5:1 ~7.4 dB
The VSWR-alarm is active down to an average output signal power > 20 dBm.
3.4.5 Reflected Output Power Supervision
If the reflected power from the antenna exceeds +38 dBm, the reflected power supervision
function will decrease the TX gain in order to limit the reflected power to a level less than
+38dBm. An RP_Alarm alarm will be issued in this condition .