TMA2148 | MI-120


Designed to be deployed with 2600MHz systems, this Tower Mounted Amplifier provides gain in the 2600MHz band and improves system noise figure, thereby saving operational and capital expenditure.

Microdata Telecom rebranding to Kaelus!
Microdata Telecom and Kaelus have had combined operations since Oct 2019 when Microdata acquired Kaelus. We strongly believe that by operating under one global brand we will clarify our strengthened position in the telecom market and from January 18th 2021, we are unifying the brands to Kaelus. The MI-120 and the TMA2148 are the same product but to ease the transition for our customers both Kaelus and Microdata part numbers will be maintained.

MI-120: part number under Microdata brand
TMA2148: part number under Kaelus brand


  • Improved base station sensitivity through gain in the 2600MHz uplink bands
  • Full AISG operation and RET (Remote Electrical Tilt) antenna support
  • Excellent noise figure performance
  • AISG2.0 compatible
  • Compact, low weight

technical specifications
Band Name 2600
Passband 2620 - 2690MHz
Insertion loss 0.4dB typical
Return loss 20dB typical, 18dB minimum
Maximum input power 200W (average) / 2000W (PEP)
Intermodulation products -165dBc typical in RX band at ANT
Passband 2500 - 2570MHz
Gain 12dB
Gain variation ±1dB maximum
Return loss 16dB minimum
Bypass return loss 12dB minimum
Bypass loss 2.0dB typical
Noise figure 1.4dB typical
Output IP3 +25dBm typical
Maximum input power with no damage +12dBm
Impedance 50Ohms
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.
DC supply voltage 9V to 30V DC
AISG version 2.0
Power consumption, AISG mode < 2W
For further details of environmental compliance, please contact Kaelus.
Temperature range -40ºC to +65ºC | -40°F to +149°F
Ingress protection IP67
Lightning protection IEC61312-1, RF: ±5kA (8/20us), AISG: ±2.5kA common mode (8/20us)
MTBF >12000,000 hours
Compliance EMC: EN 301 489-8
Safety: EN 62368-1
Operation: ETSI EN 300 019 class 4.1E
Storage: ETS 300 019-1-1 class 1.2
Dimensions H x D x W 176 x 54 x 154mm | 6.9 x 2.1 x 6in (excluding brackets and connectors)
Weight 2.4kg | 5.29lbs
Finish Powder coated, NCS 1502-R
Connectors DIN 7-16 (F) long neck or 4.3-10 (F) long neck (see ordering information)
Mounting Pole/wall bracket using two metal clamps, suits 40-140mm diameter poles
shipping information
Carton size 330 x 235 x 170mm
Gross weight (including packaging) 2.9kg
Carton Qty / Pallet 72
ordering information
Part Number Configuration Optional Features Connectors AISG Mode
TMA2148F01V1-1 TWIN, 2 in / 2 out BASE MODEL - KAELUS BRAND 4.3-10 (F) Refer to AISG MODE OF OPERATION section
TMA2148F01V2-1 TWIN, 2 in / 2 out BASE MODEL - KAELUS BRAND 7-16 (F) Refer to AISG MODE OF OPERATION section
MI-12001 TWIN, 2 in / 2 out BASE MODEL - MICRODATA BRAND 7-16 (F) Refer to AISG MODE OF OPERATION section
MI-12031 TWIN, 2 in / 2 out BASE MODEL - MICRODATA BRAND 4.3-10 (F) Refer to AISG MODE OF OPERATION section
electrical block diagram
mechanical block diagram