RDL RACK-UP Series User manual

RACK-UP®SERIES
Model RU-VSQ4
Sequencing Video Switcher
Loop-Through Output from each Input
Vertical Interval Switching
Front-Panel Manual Override
10 MHz Bandwidth, NTSC or PAL
Open-Collector Outputs
All Solid-State Switching
APPLICATION: The RU-VSQ4 is the ideal choice in most applications where up to four video signals
need to be sequenced to a single output. The RU-VSQ4 has two rear-panel jacks for each of the four
video bridging input stages. One jack is for the input signal; the other is a loop-through output of the
source signal. If 75 termination of the input signal is required, the terminator (provided) is plugged onto
the LOOP OUT jack. The output video signal is 75 back-terminated to provide unity gain into a 75 
terminated input.
The front panel features four high-reliability, keyboard-style pushbuttons with LED indicators
corresponding to each video input. The LED indicators show which video source is active. When power is
initially applied, the RU-VSQ4 sequences between the video inputs at the interval set on the recessed
front-panel RATE control. If the button for an active source is pushed, the sequencing stops and the
output displays that input. While the unit is holding at that video source, the HOLD LED indicator flashes.
When the operator again pushes the button for that channel, the sequencing resumes. At any time during
the sequence, the operator may manually select any of the four sources. The RU-VSQ4 immediately
switches to that source and remains there until the operator resumes sequencing by pushing that input
button again.
When a video source is requested, either from the front panel or by automatic sequencing, the RU-VSQ4
waits until the next vertical interval to switch to the requested video source. This feature avoids the screen
roll typically associated with unsynced video switchers. When a video source is selected, an
open-collector output on the rear panel is provided to control other equipment. If fewer than four video
sources are being used, a rear-panel jumper may be installed to program the module to use two or three
sources.
Wherever a video switcher is needed to provide automatic wide-band video source sequencing, reliability,
compactness and unsurpassed versatility, the RU-VSQ4 is the ideal choice. Use the RU-RA3 rack-mount
adapter to mount multiple RU-VSQ4s, or to combine related products (such as audio mixing, video
distribution, video detection, audio distribution, or audio metering) into a single rack unit!
RDL 659 6th St. Prescott, AZ., USA 86301 [phone] FAX [phone] www.rdlnet.com

RACK-UP®SERIES
Model RU-VSQ4
Sequencing Video Switcher
TYPICAL PERFORMANCE
Input Impedance: 5 kBridging
Gain: Unity, 75 terminated
Load Impedance: 75 
Outputs (5): 4 LOOP OUT from Input Signals;
1 Amplified Output
Operating Signal Level: 0.5 to 1 V p-p
Frequency Response: 10 Hz to 10 MHz (+/- 0.35 dB)
Noise: < -70 dB (below 1 V p-p)
Crosstalk: < -55 dB
Off Attenuation: > 65 dB
Differential Gain: 0.1%
Differential Phase: 0.3 degree
Connector Type: BNC, gold plated
External Control Outputs (4): 50 mA, Open-collector to Ground
Sequencing Rate: Adjustable 1 to 15 seconds
Power Requirement: 24 Vdc @ 110 mA,
Ground-referenced
Installation/Operation
EN55103-1 E1-E5; EN55103-2 E1-E4
Typical Performance reflects product at publication time
exclusive of EMC data, if any, supplied with product.
Specifications are subject to change without notice.
891-3065J
Radio Design Labs Technical Support Centers
U.S.A. [phone], [phone]; Fax: [phone]
Europe [NH Amsterdam] (++31) 20-6238 983; Fax: (++31) 20-6225-287
NOTE: This equipment has been tested and found to
comply with the limits for a Class B digital device, pursuant
to part 15 of the FCC Rule. These limits are designed to
provide reasonable protection against harmful interference
in a residential installation. The equipment generates,
uses and can radiate radio frequency energy and, if not
installed and used in accordance with the instructions,
may cause harmful interference to radio communications.
However, there is no guarantee that interference will not
occur in a particular installation. If this equipment does
cause harmful interference to radio or television reception,
which can be determined by turning the equipment off an
on, the user is encouraged to try to correct the
interference by one or more of the following measures:
Reorient or relocate the receiving antenna
Increase the separation between the equipment
and receiver
Connect the equipment into an outlet on a circuit
different from that which the receiver is
connected.
Consult the dealer or an experienced radio/TV
technician for help.