34 680 Series Video Distribution Amplifiers Installation and Operation Manual
Chapter 8: Specifications
VDA-683 Differential Input Video Distribution Amplifier Modules
Table 8-10. VDA-683 Input Specifications
Item Specification
Video input level 1 p-p nominal
Maximum input level 2.5 Vp-p
Input impedance 75Ω bridging
Input return loss > 40 dB to 20 MHz
Coupling DC
Common mode rejection ratio > 65 dB to 10 kHz
Common mode signal range 28 Vp-p
Table 8-11. VDA-683 Output Specifications
Item Specification
Number of outputs 8
Output impedance 75Ω
Output return loss > 45 dB to 20 MHz
Output isolation > 35 dB to 10 MHz
Response variation < 0.1 dB, 1 to 8 loads at 10 MHz
Table 8-12. VDA-683 Performance Specifications
Item Specification
Gain range -3 dB to + 3 dB
Frequency response < ±0.05 dB to 10 MHz
+0/-0.5 dB to 40 MHz
-3 dB at 100 MHz typically
Line rate window tilt < 0.20%
Field rate window tilt < 0.20%
Differential gain (10–90% APL) < 0.15%
Differential phase (10–90% APL) < 0.15°
S/N >70 dB by VM700A
Hum 1 mVp-p
Propagation delay 11.5 ± 1.0 ns
Table 8-13. VDA-683 Temperature Specifications
Item Specification
Performance 41°–104° F (5°–40° C)
Operating 32°–122° F (0°–50° C)
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