VB-1BB 75 Ω composite video isolator
The Iso•Max VB-1BB is a single-channel 75 Ω video isolator for composite (baseband) video that is used to prevent 60 cycle ‘hum bars’ even where ground voltage differences are very large such as in surveillance video systems, night clubs, video walls, broadcast stations, and industrial plants.
- Eliminates hum bars caused by ground loops
- Exceptional performance, will not deteriorate picture quality
- Very high ground isolation: 120 dB CMMR typ at 60 Hz
- Precise impedance matching ensures minimal reflection
Designed for use with standard RG59 type coaxial cable, the VB-1BB combines true 75 Ω BNC connectors with a custom wound transformer to minimize reflection. The unique design delivers an exceptionally linear bandwidth from 10 Hz to 10 MHz with virtually zero insertion loss. Plug and play easy to use, the VB-1BB features a flanged, electrically isolated housing that is easily mounted on standard 19” rack rails or inside a NEMA enclosure. One simply connects the passive device in series and problems such as ground loops are eliminated, reducing noise by as much as 120 dB.
The VB-1BB is a tremendous time saver as it eliminates excessive trouble-shooting when hunting down sporadic problems. Once installed, it often eliminates future service calls that can be attributed to non-related voltage fluctuations caused by cycling refrigeration systems, power transformers or nearby industrial facilities that may be causing power disruptions.
The Jensen Iso•Max VB-1BB delivers remarkable video quality without noise, contamination or artifact.
SPECIFICATIONS
| PARAMETER |
CONDITIONS |
MINIMUM |
TYPICAL |
MAXIMUM |
| Insertion loss |
10 kHz, test circuit 1 |
-0.50 dB |
-0.72 dB |
-1.00 dB |
| Differential gain, 3.58 MHz |
FCC/NTC-7 composite, Tektronix VM700A test set, pk-pk |
|
< 0.02% |
0.05% |
| Differential phase, 3.58 MHz |
FCC/NTC-7 composite, Tektronix VM700A test set, pk-pk |
|
< 0.02° |
0.05° |
| Luminance non-linearity |
FCC/NTC-7 composite, Tektronix VM700A test set, pk-pk |
|
< 0.01% |
0.02% |
| Bandwidth |
LF -3 dB re 10 kHz, test circuit 1 |
|
10 Hz |
12 Hz |
| Bandwidth |
HF -3 dB re 10 kHz, test circuit 1 |
15 MHz |
20 MHz |
|
| Input VSWR |
1 kHz to 8 MHz, HP 3577A Analyzer & 35676A R/T test kit |
|
1.20 |
1.30 |
| Input VSWR |
3.58 MHz, HP 3577A Analyzer & 35676A R/T test kit |
|
1.10 |
1.20 |
| Common-mode rejection ratio (CMRR) |
60 Hz, test circuit 2 |
100 dB |
120 dB |
|
| Alloable DC bias at input |
(none allowed at autput, which has 2.6 Ω DC resistance) |
-1 V |
±0 |
+16 V |
| Capacitances |
input to output, 1 kHz |
|
1.94 nF |
|
| Capacitances |
input or output to case, 1 kHz |
|
35 pF |
|
| Temperature range |
operation or storage |
0°C |
|
70°C |
| Input to output voltage difference |
input to output shield or either shield to chassis, 60 Hz |
|
|
24 V RMS 34 V peak |
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