38 680 Series Video Distribution Amplifiers Installation and Operation Manual
Chapter 8: Specifications
VPD-683-CLP Programmable Video Distribution Amplifiers
Table 8-28. VPD-683-CLP Input Specifications
Item Specification
Video input level 1 Vp-p nominal
Maximum video input level 2.5 Vp-p centered at 0V
Input impedance 75Ω bridging
Coupling DC and AC jumper selectable
Input return loss > 40 dB to 20 MHz
Max. common mode signal range 28 Vp-p
Common mode rejection ratio > 65 dB to 10 kHz
Table 8-29. VPD-683-CLP Output Specifications
Item Specification
Number of outputs 8
Level 1Vp-p nominal
Output impedance 75Ω
Output return loss > 45 dB to 5 MHz
> 40 dB to 10 MHz
Output isolation > 35 dB to 10 MHz
Response variation < 0.1 dB, 1 to 8 loads at 10 MHz
Table 8-30. VPD-683-CLP Performance Specifications
Item Specification
Gain range –3 dB to + 3 dB
Line rate window tilt < 0.25%
Field rate window tilt < 0.25%
S/N > 70 dB measured by VM700A
Hum < 1 mVp-p
Main EQ range 0–984 ft (0–300 m) Belden 8281 cable
0–656 ft (0–200 m) Belden 8241 cable
0–820 ft (0–250 m) Belden 1505A cable
0–984 ft (0–300 m) Belden 1694A cable
0–656 ft (0–200 m) PSF 1/3 cable
Main EQ response < ±0.05 to 5 MHz
< ±0.15 dB to 10 MHz
Hard clip knee 125 IRE
Soft clip knee 110 IRE
Response < ±0.1 dB DC-8 MHz
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