Designed to be used at co-located 700MHz/850MHz and 1900MHz sites, the Kaelus TMA2061 provides gain on the 1900 uplink path while diplexing the 700MHz band to avoid costly external diplexers. Separate feeders are no longer required, resulting in decreased hardware costs, environmental impact and tower licensing fees.


  • Full band 1900 TMA with 698-960MHz bypass path
  • Provides improved base station sensitivity through low noise figure and good linearity
  • High reliability with full lightning protection and a fail-safe bypass mode
  • Small twin unit, ideal for X-Pol dual band systems
  • AISG 2.0 compatible with current window alarm backup mode
  • High power handling

technical specifications
downlink (tx) path
Passband 1930 - 1990MHz
Return loss 18dB minimum (VSWR <1.3:1)
Insertion loss 0.6dB typical
Maximum input power with no damage 300W (average) / 3kW (PEP)
uplink aws (rx) path
Passband 1850 - 1910MHz
Nominal gain 12dB
Gain variation over frequency, temperature ± 1dB maximum
Noise figure 1.3dB typical
Return loss 18dB minimum operating, 14dB minimum in bypass mode
Bypass loss 2.5dB typical
Output IP3 +25dBm minimum
Maximum input power with no damage 12dBm maximum
698 - 960mhz bypass path
Passband 698 - 960MHz
Return loss 18dB minimum (VSWR <1.3:1)
Insertion loss 0.2dB typical
Maximum input power with no damage 500W (average) / 5kW (PEP)
Rejection to 1900MHz TMA bands 80dB typical
Impedance 50ohms
Intermodulation products -153dBc maximum in RX band with 2 x 20W carriers
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 TMA2061F1V1-1 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 cable +8V to +30V DC, case is DC ground
Each BTS port powered individually (programmable)
DC supply current, normal mode 100mA typical, 120mA maximum
DC supply current, alarm mode 200mA typical per LNA
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 port supplying AISG frames.
DC supply voltage +8V to +30V DC, negative ground
AISG version 2.0 (1.1 optional)
Supply current, AISG mode 55mA at 30V, 135mA at 12V
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 -40º to +65ºC | -40º to +149ºF
Ingress protection IP67
Lightning protection IEC61312-1, RF: ±5kA maximum (8/20us), AISG: ±2kA maximum (8/20us)
MTBF >1,000,000 (hours)
Compliance FCC part 15, ETSI EN 300 019 class 4.1, RoHS
Dimensions H x D x W 270 x 200 x 118mm | 10.62 x 7.87 x 4.64in (excluding brackets and connectors)
Weight 9kg | 19.8lbs
Finish Painted, light grey (RAL7035)
Connectors DIN 7-16 (F) x 6 long shank, AISG (F) x 1
Mounting Pole/wall bracket supplied with two metal clamps 45-178mm diameter poles
ordering information
Part Number Description
TMA2061F1V1-1 Twin TMA, 1900 full band, 700-900 bypass
electrical block diagram
mechanical block diagram