Specifications

Benhur Corporation – Multidyne, International Sales
20
The VDA-8505 is an economical high performance distribution
amplifier ideal for applications where clamping and long range
cable equalization are required. The DA is ideal for long range
cable runs of up to 3500 feet to monitors, for the distribution of
color black burst reference signals and for studio to studio
distribution of video signals where ground differences or DC off-
sets may exist.
The clamp circuit in the FAST mode will remove differential mode
hum from the video signal on a line by line basis. The DA will
cancel up to 40 Volts of common- mode hum.
The units is also ideal for field, remote, sporting and ENG field
applications where multiple cable types may be in use.
The equalization feature compensates for up to 3500 feet of
cable losses for two type of cable.
The user can switch select cable equalizers for either 8281 and
RG-59U or any two types of cable.
The equalizer has switch selectable 1000 foot and 2000 foot
fixed equalization stages and a 1000 foot adjustable stage for
fine adjustments.
Please specify the cable type to be used.
The unit includes a differential loop-through input and eight
outputs with a front panel video presence LED.
The full line VDA-200 Distribution Amplifiers support the 75 Ohm
coaxial distribution of AES/EBU digital audio signals.
The modular design is compatible with the MULTIDYNE UTIL-
200 and the Grass 8500/8800/8900 trays.
Specifications
Input
Type: 2 BNC Loop-through.
Impedance: 75 Ohms.
Return Loss: > 40 dB up to 5 MHz.
Output
Type: 8 BNC.
Impedance: 75 Ohms.
Return Loss: > 40 dB up to 5 MHz
Performance
Bandwidth, 3 dB: 22 MHz.
Frequency Response,
10 Hz to 5 MHz: +/-0.025 dB;
5 MHz to 8 MHz: +/-0.05 dB;
8 MHz to 10 MHz: +/-0.2 dB;
18 MHz: -1 dB.
Input Video Level Range: 0.2 to 2 Volts.
Gain Accuracy: +/- 0.05 dB.
Chrominance Burst Amplitude Accuracy:
+/- 0.05 dB.
Clamp type: Back-porch, sampling, feedback.
Equalization Range:
8281 type cable 0 - 3500 Ft with single control
RG-59U type cable 0 - 3000 Ft with single control.
Equalization Accuracy:
10 Hz to 5 MHz: +/- 0.05 dB
5 MHz to 8 MHz: +/- 0.10 dB
8 MHz to 10 MHz: +/- 0.20 dB
Chrominance Adjustment Range: +/- 9 dB Differential
Gain: <0.1 %
Differential Phase: <0.1°
Line or Field Tilt: <0.5 %
Signal to Noise: > 80 dB
Common Mode Rejection (60 Hz): >66 dB Return Loss,
to 5 MHz: >42 dB. Power Consumption, MAX: 2 Watts
VAGC-200
VAGC-200, Video Automatic Gain, 3000 ft Equalizer &
Chroma Distribution Amplifier & Automatic Proc-amp, 1x8, Modular Card
VAGC-200
Distribution Amplifiers, Automatic Gain, EQ