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Kramer VM-1021 1:20 Composite/SDI Video Distribution Amplifier

The VM-1021 is a high-performance distribution amplifier for composite or SDI video signals.

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Kramer Electronics

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The Kramer VM-1021 is a Video Distribution Amplifier accepting 1 input and outputting 20 composite video signals; it has the ability to output four groups of five separately controlled composite signals. The grouping allows for gain and EQ adjustments for different cable lengths.

Key Features:

High bandwidth - 350MHz (- 3dB)

Grouped level (Gain) and EQ (Peaking) controls

Looping input

Selectable input signal termination

Clamping - black or sync tip selectable

Video AC/DC coupling selection

Standard 19 inch rack mount size - 1U

Broadcast, production, and editing facilities

Any professional system requiring high quality signal distribution

Retail stores and other point-of-sale systems

Computer RGB or component video distribution using multiple VM-1021s in parallel


1 composite video or a single component, looping, 1Vpp/75 ohms on BNC connectors with termination switch


20 composite/component video, 1 Vpp/75 ohms on BNC connectors

Video Bandwidth(-3dB)

350 MHz

Differential Gain

0.1 %

Differential Phase

0.07 degree


0.05 %

Video S/N Ratio

74 dB

Level Control

-1.1dB to + 2.7dB with 4 trimmers accessible via the front panel

Eq. Control

0 to 2.9dB @ 4.4MHz, with 4 trimmers accessible via the front panel


0.1 %


AC, DC, and clamped - user selectable with front panel switches

Dc Clamp

0 VDC black level, or sync bottom TIP

Power Source

230VAC 50/60 Hz (115V U.S.A.), 6.7 VA


Power cord


19 in


1U rack mountable


7 in

Maximum load protection

5.7 lbs (2.6 kg Approximately)