Burst F2B, VMF-2, VM-2 Users Guide

F2B, VMF-2,

Video Mixers and Faders

VM-2

Manual Version 2.11

BURST ELECTRONICS INC
ALBUQUERQUE, NM 87109 USA
[phone] VOICE

Made in USA

[phone] TECH SUPPORT
[phone] FAX
www.burstelectronics.com

Hardware, software and manual copyright by Burst Electronics. All rights reserved. No part
of this publication may be reproduced or distributed in any form or by any means without the
written permission of Burst Electronics.

Video Mixers and Faders

Introduction

Burst Electronics manufactures a series of Mixers
and Faders. They include a single input Fade-to­Black unit, a 2 channel A to B Mixer, and a 2
channel A to B Mixer/Fader.

Model F2B Fade to Black
The F2B Fade to Black module is a single input

device. The video
input fades to
black (7.5 IRE)
through the action
of a fader bar. The
active portion of
video is stripped
away leaving
sync, color burst
and black. The
output is dc
clamped to zero
volts. The F2B is
12 Vdc powered
with a wall module
that is provided.

Options Available: PAL

Video Mixers & Faders 1

Model VMF-2 Mixer/Fader
The VMF-2 Video Mixer/Fader will accept two

synchronous
(genlocked) inputs
and smoothly fade
between th em.
Another feature is
the ability of the
VMF-2 to fade the
“A” channel to
Black. These
actions are controlled by the fader bar.

Connections

Interconnect the VMF-2 Head End unit with the
Remote Control Unit (RCU) using the RJ11 cable
attached to the RCU. Burst Electronics supplies a
3’ (1 meter) cable. This cable may be lengthened to
a maximum of 25’ (8 meters).

Connect the two video sources to the two inputs, A
& B. The sources must be synchronous (genlocked)
for a smooth transition from A to B. The output is fed
to a monitor, VTR, etc. If the application is for
Channel A Fade to Black only, then no B input is
required.

There are internal 75 Ohm terminations for each
input channel. If you want the input unterminated
(HiZ), first remove the two screws holding the front
panel on the Head End unit. Remove the front panel
and slide the top cover forward about two inches.
Remove the jumper from the appropriate input
(labeled W2 for channel “A”, W1 for channel “B”).
Replace the top cover and front panel.

Video Mixers & Faders 2

Power is supplied by a 12 Vdc 500 mA wall module
(included). Any 12 Vdc source may be used
(camera battery pack or equivalent). The center pin
for the power supply is negative.

VMF-2 Operation

The VMF-2 will fade from A to B, B to A, or A to
Black. The operation can be done manually via the
RCU’s fader bar or automatically via the TAKE
pushbutton or remote GPI trigger.

A to B, B to A Fade

Preset the fader bar to A. Select MANUAL Mode with
the top pushbutton of the RCU, the Red LED will be
on, indicatin g manual operation. Also, select A TO B
on the MODE switch of the RCU, the Green LED will
be on. Sliding the fader bar will now fade from
channel A to channel B, and from channel B to
channel A.

A to Black

Preset the fader bar to A. Select A TO BLK on th e
MODE switch, the Red LED is on. Operation of the

fader bar will now fade channel A to Black, and from
Black to A. This operation strips the active video
from the signal leaving behind the sync, color burst
and black. No B input is required for A to Black
operation.

Take Mode

Select AUTO on the MODE switch. The speed of the
TAKE is now controlled by the position of the fader

Video Mixers & Faders 3

bar. The range is from about 0.15 seconds to 5
seconds. Select the speed you desire by adjusting
the position of the fader bar. Upon hitting the TAKE
pushbutton (or activating a GPI), the action (be it A
to B, B to A, or A to Black) will occur at your preset
speed.

Options Available: PAL, Y/C (S-VHS, Hi8)
Model VM -2 Video Mixer
As with the VMF-2, this unit requires both inputs (A

& B) be
synchronous
(genlocked). This
unit fades between
channel A and
channel B. The fade
speed ranges from

0.15 seconds to 5
seconds. The adjustment for this timing is set by the
Control knob on the front panel. Turn the knob
clockwise for a faster fade rate, counter-clockwise
for a slower fade rate. The TAKE switch controls the
fade from either channel A to B, or from channel B
to A. Flip the TAKE switch towards the channel you
wish to fade to. The LED will indicate which channel
is currently being displayed.

The 3.5mm rear panel connector is for remote
control. To select channel A, connect RING to TIP;

channel B is RING to SLEEVE.
Options Available: PAL, Y/C (S-VHS, Hi8)

Video Mixers & Faders 4

Specifications (All Models)

Input/Output 1 Volt Standard Video
Input Termination 75 Ohms 1% (jumper selected)
Output Impedance 75 Ohms 1%
Video Connector BNC (4 pin MiniDIN
on VMF-2Y/C & VM-2Y/C)
Output Protection Open or Short, infinite duration
Black Output Sync, Color Burst &

7.5 IRE Setup (0 IRE for PAL)
DC Powered 11 to 14 Vdc
Power 120 VAC 60 Hz, 12 Vdc
500 mA UL Listed Wall Module
(included, center negative)

Model F2B

Bandwidth: 10 MHz @ 0.5 dB
Differential Gain: 0.1%
Differential Phase: 0.1°
S/N: 60 dB
Size: 2.5W x 6.0D x 1.8H inches
Power: 12 Vdc @ 125 mA (center negative)

Model VMF -2

Bandwidth: 10 MHz @ 0.5 dB
Differential Gain: 0.1%
Differential Phase: 0.1°
S/N: 60 dB
Cross talk: 60 dB
GPI Connector: RCA
Size (Head End): 4.1W x 5.5D x 1.5H inches
Size (RCU): 2.5W x 6.0D x 1.8H inches
Power: 12 Vdc @ 200 mA (center negative)

Model VM-2

Bandwidth: 10 MHz @ 0.5 dB
Differential Gain: 0.1%
Differential Phase: 0.1°
S/N: 60 dB
Cross talk: 60 dB
Remote Connector: 3.5 mm 3 conductor Female
(3.5 mm 3 conductor Male
included)
Size: 4.1W x 5.5D x 1.5H inches
Power: 12 Vdc @ 130 mA
(center negative)

Video Mixers & Faders 5

Video Mixers & Faders 6