TWIN TMA 700/850

Designed to be deployed in 700, 850MHz shared antenna systems, the Kaelus TMA2105 provides gain at both the 700MHz and 850MHz uplink bands


  • Improved base station sensitivity
  • Internal diplexing of the 700MHz and 850MHz bands allows for single ANT and BTS ports
  • Fail safe bypass mode with lightning protection
  • Rejection of digital TV broadcast channels
  • High linearity and low noise performance

technical specifications
Band Name700850
Passband768 - 803MHz875 - 890MHz
Insertion loss0.4dB typical0.45dB typical
Return loss18dBminimum
Group delay variation40ns maximum across band30ns maximum across band
Absolute group delay80ns maximum
Maximum input power120W (average) / 1.5kW (PEP)160W (average) / 3.2kW (PEP)
Intermodulation products-150dBc maximum with 2 x 20W carriers (in RX band)-150dBc maximum with 2 x 20W carriers (in RX band)
Nominal propagation delay52ns50ns
Passband713 - 748MHz830 - 845MHz
Gain17dB15.5dB minimum
Gain maximum18dB16.5dB
Gain minimum16dB14.5dB
Gain variation±1dB maximum
Return loss18dB minimum
Bypass return loss12dB minimum
Bypass loss2.6dB typical, 3.6dB maximum3.1dB typical, 3.6dB maximum
Noise figure1.2dB typical, 1.6dB maximum1.5dB typical, 2.0dB maximum
Output IP3+32dBm typical+32dBm typical
Maximum input power with no damage+24dBm maximum+24dBm maximum
Absolute group delay250ns maximum350ns maximum
Group delay variation150ns maximum200ns maximum
Nominal propagation delay139ns216ns
P1dB+16dBm minimum
RX in filter rejection @ 50 - 694MHz (DTV)55dB55dB
RX in filter rejection 820 - 825MHz (Land mobile radio)50dB50dB
RX in filter rejection @ 847.5 - 852MHz (STL)25dB25dB
RX out filter rejection @ 50 - 694MHz (DTV)28dB28dB
System attenuation65dB @ 50 – 694MHz (DTV)
power supply and alarm (current window alarm mode, default)
Current window alarm mode (CWA) is the default operating mode and can be configured to specific customer requirements. The F01V1 personality 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 via a field-loadable personality file. Please contact Kaelus for more information.
DC supply voltage8.5V to 30V DC, case is DC ground
DC supply voltage via BTS-RF cableThrough BTS connectors
DC supply current, normal mode150 ± 20mA per port
1.3W @ 8.5V, 4.5W @ 30V typical
DC supply current, alarm mode programmable range220 ± 20mA per port
3.3W @ 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 ports. The TMA2105F01V1-1 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 TMA2105F01V1-1.
DC supply voltage+8.5V to +30V DC
AISG version2.0 (1.1 optional)
Supply current, AISG mode220mA @ 8.5V, 70mA @ 30V typical
Voltage drop, BTS to AISG port 1.5V maximum at 2A
Power consumption, AISG mode1.9W @ 8.5V, 2.1W @ 30V typical
AISG connector, current rating< 4A peak, 2A continuous, pin 6
Field firmware upgradableYes
antenna aisg ook + dc
When a valid AISG signal is applied to either of the BTS ports, the TMA2105F01V1-1 communicates in AISG mode and applies DC/AISG to the ANT1 port. If a low resistance is detected on ANT1 port, DC/AISG is subsequently disconnected from the ANT1 port. In CWA mode, the autosensing switch is open and no DC will be passed ANT1.
Mode of OperationCurrent Draw on
ANT1 Port
Assumption"Autosense + Protection"
Switch Status
AISG or CWA Current<4ADevice present or
open circuit on ANT1
unit in AISG mode
CloseAISG signal (sub-carrier) will be supplied thru to ANT1
AISG or CWA Current>4ADC short circuit or low
DC resistance present
on ANT1 port
OpenAttempt are made
periodically to re-connect
TMA2105FxxVx-1 will operate in AISG mode.
AISG or CWA ANYUnit in CWA modeOpenNo DC will be passed on to ANT1
For further details of environmental compliance, please contact Kaelus.
Temperature range-10ºC to +55ºC | +14°F to +131°F
Ingress protectionIP67
Altitude2,600m | 8,530ft
Lightning protectionIEC61312-1, RF: ±5kA maximum (8/20us), AISG: ±2kA maximum (8/20us)
MTBF>1,000,000 hours
ComplianceEMC:EN301 489, ETSI EN 300 019 class 4.1, RoHS
Dimensions H x D x W457 x 275 x 208mm | 18 x 10.8 x 8.2in
Weight25kg | 55lbs estimate
FinishPowder coated, light grey (RAL7035)
ConnectorsDIN 7-16 (F) x 4 long neck, AISG (F) x 1
MountingPole/wall bracket supplied with two metal clamps 55-178mm diameter poles
ordering information
Part NumberConfigurationOptional FeaturesConnectors
TMA2105F01V1-1TWIN 2 in / 2 outAISG + DC pass through to ANT1DIN 7-16 (F)
electrical block diagram
mechanical block diagram