Designed to to be deployed in co-located AWS & 1900 networks, the Kaelus TMA2123 provide gain in the uplink of both bands using a common LNA for reduced size and performance efficiency. Low loss bypass to 698-960MHz low band antennas is also provided.


  • Improved base station sensitivity through excellent noise figure performance and linearity
  • AISG 2.0 compatible, full software upgradable using AISG “personality” upload
  • DC/AISG passthrough to PCS antenna (port 1)
  • AISG OUT connector disabled when AISG device (SBT equipped antenna) present on Port 1 +R1
  • One AISG subunit per LNA, 2 in total. All fixed gain.
  • Internal duplexing of 698-960MHz signals to be passed to additional ANT ports
  • AWS and 1900 diplexed

technical specifications
Band Name1900AWS
Passband1930 - 1990MHz2110 - 2200MHz
Insertion loss0.7dB typical0.4dB typical
Return loss22dB typical
Maximum input power160W (average) / 1.6kW (PEP)160W (average) / 1.6kW (PEP)
Intermodulation products-155dBc maximum, at antenna port in RX band with 2 x 20W carriers-163dBc maximum, at antenna port in RX band with 2 x 20W carriers
Passband1850 - 1910MHz1710 - 1780MHz
Gain variation±1dB maximum
Return loss22dB typical
Bypass return loss12dB minimum
Bypass loss2.7dB typical2.5dB typical
Noise figure1.4dB typical
Output IP3+28dBm typical
Maximum input power with no damage12dBm
700/850 bypass band
Passband698 - 960MHz
Insertion loss0.1dB typical
Return loss21dB typical
Maximum input power120W (average) / 2kW (PEP)
Intermodulation products-155dBc maximum, at antenna port with 2 x 20W carriers
power supply and alarm (current window alarm mode, default)
Current window alarm mode (CWA) is the default operating mode and can be configured to specific customer requirements. The TMA2123F03V4 is configured so that both channels are independently powered and monitored via their respective BTS port, 5 or 6. The BTS port sinks additional current to indicate an alarm state in its uplink path. Normal operating and alarm current values are configured independently via a field-loadable personality file. Please contact Kaelus for more information.
DC supply voltage7.5 to +18V DC, case is DC ground
DC supplyEach BTS port powered individually
DC supply current, normal mode150mA per port typical
DC supply current, alarm mode220mA per port typical
aisg mode of operation (auto selected on valid aisg 2.0 frames)
AISG signals can be applied to port 5 or port 6. The TMA unit switches to AISG mode when valid frames are detected on either port 5 or 6. All LNAs take DC power from the port with the AISG frames or, if DC is present on both ports, power will be supplied equally between the ports. Each LNA is controlled uniquely by its sub-unit number.
DC supply voltage+7.5V to +30V DC
AISG version2.0 (1.1 optional)
Supply current, AISG mode265mA @ 7.5V, 75mA @ 30V typical
AISG connector, current ratingIEC60130-9, 8-pin female, < 4A peak, 2A continuous, pin 6
Field firmware upgradableYes
AISG pass through to antenna portYes
antenna aisg ook + dc
When DC is applied to the TMA2123F03V4-1 it is quickly switched through to port 1. If an over-current condition is detected, DC & AISG are disconnected from port 1. If DC remains connected to the load at port 1, DC and AISG are disconnected from the AISG OUT 8 pin connector. If DC is disconnected from port 1, DC and AISG are enabled at the AISG OUT 8 pin connector. If a short circuit is detected at the AISG OUT 8 pin connector, DC and AISG are disabled.
Mode of OperationVoltage at
Port 1
Assumption"Autosense + Protection"
Switch Status
AISG or CWA HighDevice present or
open circuit
CloseDC & AISG OOK will be
supplied to port 1.
DC & AISG is removed
from the AISG OUT 8 pin port
AISG or CWA LowDC short circuit or low
DC resistance
OpenDC & AISG OOK will not be
supplied to port 1.
DC & AISG are supplied
to the AISG OUT 8 pin port
For further details of environmental compliance, please contact Kaelus.
Temperature range-40ºC to +65ºC | -40°F to +149°F
Ingress protectionIP67
Altitude2,000m | 6,560ft
Lightning protectionIEC61312-1, RF: ±5kA maximum (8/20us), AISG: ±2kA maximum (8/20us)
MTBF>1,000,000 hours
ComplianceFCC Part 15 subpart B
Dimensions H x D x W300 x 95 x 250mm | 11.8 x 3.7 x 9.8in excluding brackets and connectors
Weight11kg | 24lbs
FinishPainted, light grey (RAL 7035)
ConnectorsDIN 7-16 (F) x 6 long neck, AISG (F) x 1
MountingPole/wall bracket supplied with two metal clamps 45-178mm diameter poles
ordering information
Part NumberConfigurationOptional FeaturesConnectors
TMA2123F03V4-1A TWIN 2 in / 4 outSTANDARDDIN 7-16 (F)
TMA2123F03V4-2A QUAD 4 in / 8 outSTANDARDDIN 7-16 (F)
electrical block diagram
mechanical block diagram