TWIN TMA 850/1900

Designed to be deployed in co-located 850MHz and 1900MHz systems, the Kaelus TMA2071 provides internal diplexing of the different bands saving capital expenditure on costly external diplexers. The TMA2071 has the following features and benefits:


  • Full band 850MHz and 1900 MHz
  • Excellent system performance through high linearity and low noise performance
  • AISG and current dump compatible
  • Compact, low weight and simple to install
  • Fails safe bypass mode with lightning protection
  • Hardware and software configuration using AISG “personality” upload

technical specifications
Band Name8501900
Passband869 - 894MHz1930 - 1990MHz
Insertion loss0.4dB typical mid-band0.6dB typical mid-band
Return loss18dB minimum
Maximum input power300W (average) / 3kW (PEP)200W (average) / 3kW (PEP)
Passband824 - 849MHz1850 - 1910MHz
Gain variation±1dB maximum
Return loss18dB minimum
Bypass return lossTypical 18dB minimum, Guarantied 14 dB minimum
Bypass loss2dB typical2.4dB typical
Noise figure1.2dB typical1.3dB typical
Output IP3+20dBm minimum+25dBm minimum
Maximum input power with no damage+12dBm maximum
Intermodulation products-153dBc maximum, in RX band, IM3, ANT port
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 voltage via BTS-RF cable7.5V to 18V DC, case is DC ground
DC supply current, normal mode250 ± 30mA per port
DC supply current, alarm mode programmable range350 ± 30mA per port
Power consumption, normal operation 1.9W @ 7.5V, 4.5W @ 18V typical
Power Consumption, alarm mode 5.25W @ 15V per port typical
aisg mode of operation (auto selected on valid aisg 2.0 frames)
AISG signals can be applied to either BTS1 or BTS2 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.
AISG version2.0 (1.1 optional)
Supply current, AISG mode420mA @ 7.5V, 110mA @ 30V typical
Voltage drop, BTS to AISG port 1.5V maximum at 2A
Power consumption, AISG mode3.2W @ 7.5V, 3.3W @ 30V typical
AISG connector, current ratingIEC60130-9, 8-pin female ,< 4A peak, 2A continuous, pin 6
For further details of environmental compliance, please contact Kaelus.
Temperature range-40ºC to +65ºC | -40°F to +155°F
Ingress protectionIP67
Lightning protectionIEC61312-1, RF: ±5kA maximum (8/20us), AISG: ±2kA maximum (8/20us)
MTBF>1,000,000 hours
ComplianceFCC Part 15, ETSI EN 300 019 class 4.1, RoHS
Dimensions H x D x W314 x 235 x 148mm | 12.36 x 9.25 x 5.82in (excluding brackets and connectors)
Weight17.2kg | 37.9lbs
FinishPainted, light grey (RAL7035)
ConnectorsRF: DIN 7-16 (F) x 6 long neck
MountingPole/wall bracket supplied with two metal clamps 45-178mm diameter poles
ordering information
Part NumberConfigurationOptional FeaturesConnectors
TMA2071F00V1-1 TWIN 2 in / 4 outConfigured with generic personalityDIN 7-16 (F)
TMA2071FxxV1-1 TWIN 2 in / 4 outxx denotes custom personalityDIN 7-16 (F)
electrical block diagram
mechanical block diagram