VHF BIII DTV COMBINER

Lebih Lengkap Mengenai VHF BIII DTV COMBINER

Frequency Range: 174 ÷ 240 MHz
Bandwith: 6 to 8 MHz
Temperature Stability: ≤ 2 kHz/K
Operating Temperature: -10 to + 50°C
Over Temperature*: 30K at 20 kW DTV (NB)
Weight (approx): 175 Kg


Connectors                        INPUTS / OUTPUT DTV (ATV) POWER *
NB WB OUT                           NB                    WB                   OUT
E     E      E                      20kW (30kW) 30kW (45kW) 30kW (45kW)

* referred to DVB-T 7 MHz standard, recommended: [AmbientTemp. + OverTemp.] ≤60°C
• A=Nf B=7/16f C= 7/8”unfl D=1-5/8”unfl E=3-1/8”unfl F=4-1/2”unfl
G=6-1/8”unfl H=RL-120


-Electrical Data

Typical Tuning: 7 MHz MASK

**NB InsertionLoss (Typical): ≤ 0.23 dB at C.F.
                                                 ≤ 0.54 dB at C.F. ±3.325 MHz

WB Insertion Loss: ≤ 0.05 dB

Selectivity:
≥ 4 dB at C.F.±3.675 MHz
≥ 16 dB at C.F.±5.25 MHz
≥ 42 dB at C.F.±10.5 MHz

Return Loss:
NB ≥ 26 dB
WB ≥ 26 dB on specifi ed channel or
WB ≥ 23 dB

De-Coupling: ≥ 30 dB
Group Delay Variation: ≤ 300 ns (Typical)



Typical Tuning: 6 MHz  MASK

**NB InsertionLoss (Typical):  ≤ 0.28 dB at C.F.
                                                  ≤ 0.44 dB at C.F. ±2.7 MHz

WB Insertion Loss: ≤ 0.05 dB

Selectivity:
≥ 3 dB at C.F.±3.5 MHz
≥ 29 dB at C.F.±6 MHz
≥ 38 dB at C.F.±9 MHz

Return Loss:
NB ≥ 26 dB
WB ≥ 26 dB on specifi ed channel or
WB ≥ 23 dB

De-Coupling: ≥ 30 dB
Group Delay Variation: ≤ 350 ns (Typical)