The Kaelus twin 850MHz TMA has been designed to operate in any 850MHz cellular network and provides excellent noise figure performance.


  • Dual duplex twin TMA providing improved base station sensitivity through excellent noise performance, high linearity and variable gain
  • Hardware and software configuration using AISG “personality” upload
  • High reliability with full lightning protection and a fail-safe bypass mode
  • AISG and current dump compatible
  • Small light weight and easy to install

technical specifications
downlink (tx) path
Passband869 - 894MHz
Return loss18dB minimum
Insertion loss0.3dB typical
EVM3% maximum
Group delay variation20ns maximum (4MHz)
Maximum input power with no damage200W (average) / 2kW (PEP)
uplink (rx) path
Passband824 - 849MHz
Nominal gainVariable 8dB to 16dB (selected via AISG, default 16dB)
Gain variation over frequency, temperature±1dB maximum
Noise figure1.0dB typical @ 12dB gain
Return loss18dB minimum, 12dB minimum in bypass mode
Insertion loss2.0dB typical in bypass mode
Group delay variation40ns maximum (4MHz)
Maximum input power with no damage+12dBm maximum
Input intercept point +8dBm minimum
Intermodulation products-153dBc maximum at antenna ports, 2 x 43dBm TX carriers
50 - 750MHz46dB minimum
1000 - 2200MHz46dB minimum
power supply and alarm (current window alarm mode, default)
Current Window Alarm Mode (CWA) is the default TMA operating mode and can be configured to specific customer requirements. The Generic personality (F00V1) is configured so that both channels are independently powered and monitored via the respective BTS port. The BTS port sinks additional current to indicate an alarm state in its uplink path. Normal operating and alarm current values are configured independently and are alterable via a field-loadable personality file, contact Kaelus for more information.
DC supply voltage8.5V to 30V DC
DC supply voltage via BTS-RF cableEach BTS port powered individually (programmable)
DC supply current, normal mode100mA typical, 120mA maximum (programmable with two BTS ports powered)
DC supply current, alarm mode180mA typical
aisg mode of operation (auto selected on valid aisg 2.0 frames)
AISG signals can be applied to either BTS port. The TMA unit switches to AISG mode when valid frames are detected on one of the ports. The TMA unit is DC powered only from the BTS port supplying the AISG frames.
DC supply voltage+8.5V to +30V DC
AISG version2.0 (1.1 optional)
Supply current, AISG mode55mA at 30V, 135mA at 12V
Voltage drop, BTS to AISG port 1.5V maximum at 2A
AISG connector, current ratingIEC60130-9, < 4A peak, 2A continuous, pin 6
Field firmware upgradableYes
For further details of environmental compliance, please contact Kaelus.
Temperature range-40º to +65ºC | -40º to +149ºF
Ingress protectionIP67
Altitude2,000m | 6,561ft
Lightning protectionIEC61312-1, RF: ±2kA maximum (10/350us)
AISG: ±2kA maximum (8/20us)
MTBF>1,000,000 (hours)
ComplianceEMC:EN301 489, ETSI EN 300 019 class 4.1, RoHS
Dimensions H x D x W217 x 239 x 86mm | 8.54 x 9.41 x 3.38in
Weight7.5kg | 16.53lbs
FinishPainted, light grey (RAL7035)
ConnectorsDIN 7-16 (F) x 4 long shank
MountingPole/wall bracket supplied with two metal clamps 45-178mm diameter poles
ordering information
Part NumberDescription
xx Denotes customized CWA configuration
TMA2040F00V1-1Twin TMA, 850MHz full band, with AISG configured with generic CWA configuration
TMA2040FxxV1-1Twin TMA, 850MHz full band, with AISG
TMA2040F02V1-1Twin TMA, 850MHz full band, Kaelus TMA0004 replacement personality
electrical block diagram
mechanical block diagram