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 11 (19) 29 Mar 00
3.4.6 Total Feeder DC Resistance and Maximum Feeder Length
Maximum length: 250 m (833 ft)
Maximum feeder DC resistance: 2Ω
Measured between the inner and outer connector with the other feeder end short circuited.
**Note: Only valid when using feeder cable for DC-feed.
3.4.7 Intermodulation Distorsion
The measurements are made on both ports with the TTPA operating at its nominal rated output
power and with:
Two interfering signals in the PCS-RX band at a power level of -40 dBm at ANT port.
One interfering signals in the PCS-TX band at a power level of +13 dBm at ANT port.
Maximum IMD level:
Band ANT port BTS port Meas BW
RX -128 dBm -114 dBm 100 kHz
TX -70 dBc -70 dBc 100 kHz
3.5 T
RANSMIT
P
ATH
P
ARAMETERS
3.5.1 TX Operating Frequency
-
See section 2.1
3.5.2 TX Nominal Output Power
Measured at the ANT port, within the tuned TX band.
Min: +43 dBm (20W)
3.5.3 TX Overload Supervision
When the average Output Power exceeds 43 dBm with:
> 1.0 dB an TX-OP Minor Alarm (TX Over Power) alarm is issued
> 2.0 dB the TX power is soft limited by the AGC circuitry not to exceed this value.
and a TX-OP Major Alarm is issued.
3.5.4 TX Two Tone Linearity
Measured with two CW signals of 37dBm each (43dBm Peak Power) out from the unit in TX
band, giving 40dBm total average output power. Max 1MHz spacing between tones.
Level of IM-tones Max: -30dBc
3.5.5 TX Nominal Gain
Nominal Gain is defined as [MaxGain(inband) + MinGain(inband)] / 2
7dB