TWIN TMA 1800/2100

Designed to be deployed in co-located 1800 & 2100MHz systems with wideband antennas, the Kaelus TMA2053 provides internal diplexing and gain in both bands, thereby saving hardware costs.


  • Improved base station sensitivity through gain in the 1800 and 2100 uplink bands
  • Hardware & software configuration using AISG “personality” upload
  • Excellent noise figure performance
  • Internal diplexing of 1800 and 2100MHz bands
  • AISG2.0 compatible
  • Compact, low weight

technical specifications
Band Name 1800 2100
Passband 1805 - 1880MHz 2110 - 2170MHz
Insertion loss 0.6dB typical 0.4dB typical
Return loss 18dB minimum (VSWR <1.3:1) 18dB minimum
Maximum input power 200W (average) / 2kW (PEP) 120W (average) / 2kW (PEP)
Intermodulation products -153dBc maximum (3rd order) in RX band with 2 x 20W carriers -163dBc maximum, (7th order) in RX band with 2 x 20W carriers
Passband 1710 - 1785MHz 1920 - 1980MHz
Gain 12dB
Gain variation ±1dB maximum
Return loss 18dB minimum
Bypass return loss 12dB
Bypass loss 2.5dB typical 2.9dB typical
Noise figure 1.25dB typical 1.35dB typical
Output IP3 +24dBm minimum +30dBm typical
Maximum input power with no damage +12dBm
Impedance 50Ohms
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 (F03V3) personality is configured so that when DC power is applied to either BTS port, all LNAs are switched on. Power can also be applied to both BTS ports however current will only be drawn from the BTS1 port in this instance. 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 7.5V to 30V DC, case is DC ground via BTS-RF cable
DC supply voltage via BTS-RF cable DC power can be applied to either port
DC power to be drawn from one BTS port only
DC applied to both BTS ports power will only be drawn from BTS1
DC supply current, normal mode 250 ± 15mA per port
DC supply current, alarm mode 300 ± 20mA per port
power consumption
CWA Operating Mode BTS1 BTS2
Normal (all LNAs OK) 10-18VDC @ 250mA 0V
Normal (all LNAs OK) 0V 10-18VDC @ 250mA
Normal (all LNAs OK) 10-18VDC @ 250mA 10-18VDC @ <10mA
Alarm (any LNA fault) 10-18VDC @ 300mA 0V
Alarm (any LNA fault) 0V 10-18VDC @ 300mA
Alarm (any LNA fault) 10-18VDC @ 300mA 10-18VDC @ <10mA
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 BTS ports. Both LNAs take DC power from the port with AISG frames or, if DC is present on both ports, both channels supply equal power to the TMA.
DC supply voltage 10V to 30V DC
AISG version 2.0 (1.1 optional)
Supply current, AISG mode 210mA @ 10V, 75mA @ 30V typical
Voltage drop, BTS to AISG port 1.5V maximum at 2A
AISG connector, current rating IEC60130-9, 8-pin female ,< 4A peak, 2A continuous, pin 6
Field firmware upgradable Yes
For further details of environmental compliance, please contact Kaelus.
Temperature range -40ºC to +65ºC | -40°F to +155°F
Ingress protection IP67
Lightning protection IEC61312-1, RF: ±5kA maximum (8/20us), AISG: ±2kA maximum (8/20us)
MTBF >1,000,000 hours
Compliance EMC:EN301 489, ingress ETSI EN 300 019 class 4.1, RoHS
Dimensions H x D x W 168 x 300 x 93mm | 6.61 x 11.81 x 3.66in (excluding brackets and connectors)
Weight 7.9kg | 17.4lbs
Finish Powder coated, light grey (RAL7035)
Connectors DIN 7-16 (F) x 4 long neck or 4.3-10 (F) x 4 long neck
Mounting Pole/wall bracket supplied with two metal clamps 45-178mm diameter poles
ordering information
Part Number Configuration Optional Features Connectors
Kaelus TMAs can be uploaded with customer specific CWA configuration, customer specific firmware (FW) and a custom bracket (BKT). Please contact Kaelus for more information.
TMA2053F00V1-1 TWIN 2 in / 2 out Configured with generic personality DIN 7-16 (F)
TMA2053F03V2-4 TWIN 2 in / 2 out CUSTOM CWA, BKT DIN 7-16 (F)
TMA2053F03V3-4C TWIN 2 in / 2 out CUSTOM CWA, BKT, FW DIN 7-16 (F)
electrical block diagram
mechanical block diagram