DIPLEXER 600-700/850

The Kaelus DBCT108 is a bi-directional Diplexer designed to combine 600-700 with 850 technologies, the DBCT108 provides excellent insertion loss and passive intermodulation performance. Bidirectional passage of DC/AISG is provided in this outdoor product.


  • Enables antenna/feeder sharing for 600-700 and 850 networks
  • Designed and 100% tested for low passive intermodulation
  • Autosense of DC allows operation at the bottom or the top of the tower
  • Low insertion losses
  • Good return loss

technical specifications
Port Name600-700850
Passband555 - 798MHz824 - 894MHz
Insertion loss0.15dB typical0.2dB typical
Return loss23dB typical
EVM≤0.5% across any 10MHz≤0.5% across any 20MHz
Group delay variation7.5ns typical over any 10MHz10ns typical over any 20MHz
Absolute group delay7.5ns typical17.5ns typical
Maximum input power120W (average) / 1200W (PEP)120W (average) / 1200W (PEP)
Phase linearity over any 10MHz2° typical, 10 °maximum
Intermodulation products-156dBc maximum with 2 x 20W carriers
Isolation50dB typical
dc / aisg
The DC/AISG path is automatically selected. In bottom of the tower applications (combiner mode), each RF channel port is sequentially checked for the presence of DC voltage. If more than one port has voltage, the port that has the highest (programmed) priority is passed to the common port. If a short circuit is detected on the common port DC/AISG is disabled. In top-of-tower applications (splitter mode), DC/AISG is passed to all ports that do not present a short circuit. If a short circuit is detected, the shorted RF port will be disabled for DC/AISG while other RF ports remain connected.
Passband2.076 -2.276MHz
Input voltage range7.5 - 30V DC
DC current rating2.5A continuous
Port priority (combiner mode)1st) 600-700, 2nd) 850
For further details of environmental compliance, please contact Kaelus.
Temperature range-40ºC to +65ºC | -40ºF to +149ºF
Ingress protectionIP67
Altitude3000m/10,000ft maximum
Lightning protectionRF: ±5kA maximum (8/20us), IEC61312-1
MTBF>1,000,000 hours
ComplianceFCC Part 15 subpart B
Dimensions H x D x W (single twin unit)172 x 267 x 89 mm | 6.77 x 10.51 x 3.50 in maximum
Dimensions H x D x W (dual twin unit)172 x 267 x183 mm | 6.77 x 10.51 x 7.20 in maximum
Weight5.5kg / 12lbs (single twin)
10.9kg / 24lbs (dual twin)
FinishPainted, light grey (RAL7035)
Connectors4.3-10 (F) x 6 long neck (single twin)
4.3-10 (F) x 12 long neck (dual twin)
Wind LoadFront 55N, Side 304N (single twin)
Front 140N, Side 339N (dual twin)
At 74m/s (AS/NZS 1170-2-2011 Structural design - Wind actions - Cyclone areas)
MountingPole/wall bracket supplied with two metal clamps for 45-178 mm diameter poles
ordering information
Part NumberConfigurationOptional FeaturesConnectorsDC/AISG Configuration
DBC0108F1V72-1 SINGLE 1 in / 2 outDC AUTOSENSING WITHOUT LED 4.3-10 (F)PRIORITY 600-700/850
DBCT108F1V72-1TWIN 2 in / 4 outDC AUTOSENSING WITHOUT LED 4.3-10 (F)PRIORITY 600-700/850
DBCT108F1V72-2QUAD 4 in / 8 outDC AUTOSENSING WITHOUT LED 4.3-10 (F)PRIORITY 600-700/850
electrical block diagram
mechanical block diagram