TMA2143 | MI-192

TWIN TMA 1800/2100/2600 with Low-band BYPASS

Designed to be deployed in co-located 1800, 2100 and 2600MHz systems with wideband antennas, this Tower Mounted Amplifier provides gain in all of the high bands plus antenna port diplexing of the 1800 and 2100 bands..

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-192 and the TMA2143 are the same product but to ease the transition for our customers both Kaelus and Microdata part numbers will be maintained.

MI-192: part number under Microdata brand
TMA2143: part number under Kaelus brand


  • Improved base station sensitivity in the 1800, 2100 and 2600 uplink bands
  • 694-960MHz antenna ports
  • 2600 antenna ports
  • AISG2.0 compatible
  • Compact, low weight
  • Excellent noise figure performance

technical specifications
Band Name 1800 2100 2600
Passband 1805 - 1880MHz 2110 - 2170MHz 2620 - 2690MHz
Insertion loss 0.5dB typical 0.4dB typical 0.4dB typical
Return loss 18dB minimum
Maximum input power 200W average* 200W average* 200W average*
Intermodulation products -160dBc in RX band at ANT
Passband 1710 - 1785MHz 1920 - 1980MHz 2500 - 2570MHz
Gain 12dB
Return loss 16dB minimum
Bypass return loss 12dB minimum
Bypass loss 2.0dB typical 2.2dB typical 2.0dB typical
Noise figure 1.4dB typical 1.4dB typical 1.4dB typical
Output IP3 +25dBm typical
Maximum input power with no damage +10dBm
low band bypass path
Passband 694 - 960MHz
Return loss 18dB minimum
Insertion loss 0.2dB typical
Maximum input power with no damage 200W(*)
(*) Versions with 4.3-10 (F) connectors are limited to 500W (average) combined power.
Impedance 50Ohms
aisg mode of operation (auto selected on valid aisg 2.0 frames)
AISG signals can be applied to the BTS ports. The TMA unit switches to AISG mode when valid frames are detected on either port. Each LNA is controlled uniquely by its sub-unit number.
DC supply voltage +9.0V to +30V DC
AISG version 2.0
Power consumption, AISG mode < 4W
AISG connector, current rating IEC60130-9, 8-pin female
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 (8/20us), AISG: ±2kA (8/20us)
MTBF >1,000,000 hours
Compliance EMC: EN 301 489-50
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 309 x 123 x 1231mm | 12.16 x 4.8 x 9.1in (excluding brackets and connectors)
Weight 12kg | 26.46lbs
Finish Powder coated, NCS 1502-R
Connectors DIN 7-16 (F) long neck or 4.3-10 (F) long neck, AISG (F)
Mounting Pole/wall bracket using two metal clamps, suits 40-140mm diameter poles
ordering information
Part Number Configuration Optional Features Connectors AISG Mode
TMA2143F01V1-1 TWIN, 2 in / 6 out BASE MODEL 4.3-10 (F) COMMON MODE
TMA2143F01V2-1 TWIN, 2 in / 6 out BASE MODEL 7-16 (F) COMMON MODE
MI-19201 TWIN, 2 in / 6 out BASE MODEL 7/16 (F), 1xAISG COMMON MODE
MI-19202 TWIN, 2 in / 6 out BASE MODEL 7-16 (F), 1xAISG COMMON MODE
MI-19206 TWIN, 2 in / 6 out BASE MODEL 7-16 (F), 2xAISG INDEPENDENT MODE
MI-19231 TWIN, 2 in / 6 out BASE MODEL 4.3-10(F), 1xAISG COMMON MODE
MI-19232 TWIN, 2 in / 6 out BASE MODEL 4.3-10 (F), 1xAISG COMMON MODE
MI-19236 TWIN, 2 in / 6 out BASE MODEL 4.3-10 (F), 2xAISG INDEPENDENT MODE
(*) TWOTWO: the TMA is identified as 2 logic units with 2 subunits each
(**) TRITWO: the TMA is identified as 3 logic unit with 2 subunits each
electrical block diagram
mechanical block diagram