WISCO International (Decibel Products DB4398)

Hybrid Combiners 851 -869 MHz
DB4398 For 800/900 SMR Trunking

Compact and adaptable, Decibel Products' DB4398 hybrid combiners offer both high performance and the ultimate in packaging flexibility.

Employing dual-junction isolators to typically yield greater than 75 dB transmitter-to transmitter isolation, the convertible design permits variable combining for narrow frequency separations.

The isolators feed into a Wilkinson combiner, followed by a harmonic filter to generate an integrated multi-port hybrid system. An economical and reliable printed circuit board construction supplies rock-solid performance.

State of the art substrate design ensures a low insertion loss.

Compact and Convenient - Available in two styles: bracket-mountable or 2-rack unit tray.

Low Loss - Efficient design for maximum power output.

Fan Option - Available for cooling when needed.

Electrical Data
Model Number (s) (Tray w/Fans)	DB-4398-41CNN (Single, -48 VDC) DB-4398-41CPN (Single, +12 VDC)
Model Number (s) (Bracket Mounted)	DB-4398-41CBN (Single)
Application	Convertible 4 port or dual 2-port hybrid combiner for 800 MHz Trunking Trasmitters
Frequency Range	851-869
Max. Input Power	70 Watts (avg.)/350 Watts (peak) 110 Watts with air cooling
Insertion Loss (Max.) - dB	380-512 MHz
Isolation - dB Tx to Tx Antenna-to-Tx	71 55
Input Return Loss	19
3rd Order IM (Max.)	-85 dBc @ 2 x 70 Watts input
2nd Harmonic Attn (Max.)- dB	55 dB
2nd Harmonic Output (Max.)	-70 dBc @ 70 Watts input
Fan DC input (Max.)	-48 VDC @ 0.4 Amps +12 VDC @ 1.2 Amps

Mechanical Data
Mounting	19" Rack, Tray (Horiz.) or Brackets (Vert.) Mount
Temperature Range	-30� to +50� C
Connectors RF: DC:	Type N-Female 4 Pin Mate-N-Lock
Finish Tray: Combiner:	Black powder coat Clear Anodyne
Dimensions - (W x H x D) Rack Mount Unit: Bracket Mount Unit:	19 (482.6) Rack 15 (381)
Weight - lbs (kg)	98 (44.5)