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Frame Manual

500ADA Analog Video Distribution Amplifier

TABLE OF CONTENTS

1. OVERVIEW......................................................................................................................................... 1

2. INSTALLATION.................................................................................................................................. 2

3. SPECIFICATIONS.............................................................................................................................. 3

3.1. ANALOG VIDEO INPUT............................................................................................................ 3

3.2. ANALOG VIDEO OUTPUTS ..................................................................................................... 3

3.3. ELECTRICAL ............................................................................................................................ 3

3.4. PHYSICAL................................................................................................................................. 3

4. STATUS LEDS ................................................................................................................................... 4

5. CIRCUIT DESCRIPTION.................................................................................................................... 4

6. JUMPERS AND USER ADJUSTMENTS ........................................................................................... 4

6.1. SELECTING WHETHER LOCAL FAULTS WILL BE MONITORED

BY THE GLOBAL FRAME STATUS......................................................................................... 5

6.2. SELECTING THE INPUT TERMINATION................................................................................. 5

6.3. SELECTING THE INPUT AC/DC COUPLING .......................................................................... 5

6.4. GAIN ADJUSTMENT................................................................................................................. 5

Figures

Figure 1: 500ADA Block Diagram ....................................................................................................................... 1

Figure 2: 500ADA Rear Panel Overlay ............................................................................................................... 2

Figure 3: LED and Jumper Locations.................................................................................................................. 4

Revision 1.1

Frame Manual

500ADA Analog Video Distribution Amplifier

REVISION HISTORY

REVISION DESCRIPTION DATE

1.0 Original Version Oct 02

1.1 Spec Updated to Rev A PCB Nov 02

Revision 1.1

Frame Manual

500ADA Analog Video Distribution Amplifier

1. OVERVIEW

The 500ADA Analog Distribution Amplifier is a general purpose amplifier for distributing analog video

signals. The 500ADA features one balanced input with nine outputs. The 500ADA amplifier has been

designed to distribute a wide range of analog video signals. It can also distribute other pulses and signals

that are less than 2Vp-p.

The 500ADA is housed in the 500FR Frame that will hold up to 16 modules.

Features:

• 75 Ohm or high impedance input (jumper selectable)

• High common mode range and common mode rejection ratio (CMMR)

• Gain control

• Jumper selectable AC or DC coupling

• Looping feature with external "T" connector

• Consistent input impedance if card power is lost

9 Analog

Outputs

Impedance

AC/DC

Coupling

Ω

Balanced

Analog Input

Gain

FAULT

Controls/

Indicators

Figure 1: 500ADA Block Diagram

Revision 1.1 500ADA-1

Frame Manual

500ADA Analog Video Distribution Amplifier

2. INSTALLATION

The 500ADA comes with a companion rear panel overlay that can be placed over the rear panel BNC

connectors to identify their function. For information on inserting the module into the frame see the 500FR

chapter section 3.

Figure 2: 500ADA Rear Panel Overlay

IN Input (isolated) BNC connector for analog video signals. The TERM jumper located on the

module near the back determines whether the input signal will be high impedance or

terminated with 75 ohms. (See section 6.2) The INPUT jumper located on the module near

the back determines whether the input signal will be AC or DC coupled. (See section 6.3)

OUT 1 to 9 There are nine BNC connectors with level adjusted copies of the input signal.

500ADA-2 Revision 1.1

Frame Manual

500ADA Analog Video Distribution Amplifier

3. SPECIFICATIONS

Note: At the time of printing, this product has only been qualified for use with standard definition signals. It,

however, has been designed to work with high definition signals. Frequency and phase response will not

be optimized at the upper frequency range of high definition video bandwidths.

All specifications, unless indicated, measured under the following conditions:

• 1 Vp-p video applied

• 75 Ohm card input terminated

• AC coupled

• Gain adjusted for unity operation into 75 Ohm load

3.1. ANALOG VIDEO INPUT

Standards: Any analog video format, up to 2Vp-p and 30MHz bandwidth

Connector: 1 BNC input per IEC 169-8

Common mode range: >6Vp-p

CMRR: > 70dB to 1kHz

Signal amplitude: 2.5Vp-p max

Impedance: 75Ohms terminated, 35kOhms Hi-Z (jumper selectable)

Coupling: AC or DC (jumper selectable)

Return loss: >40dB to 10MHz, >30dB to 30MHz

3.2. ANALOG VIDEO OUTPUTS

Number of Outputs: 9 Per Card

Connector: BNC per IEC 169-8

Output impedance: 75 Ohm

Gain control range: ± 5dB

DC level (DC Coupling active) < +/- 100mV

Freq. Response: <+/-0.05dB (to 5.5MHz)

Differential Gain: <0.17 %

Differential Phase: < 0.19 deg

C/L gain inequality: <+/-0.1%

C/L Delay: <+/-2nsec

Output isolation: 42dB to 10MHz, 32 dB to 30MHz

Output return loss: >40dB to 30MHz

Noise performance: <-78dB RMS NTC7 weighting,

<-70dB RMS 15kHz to 5.5MHz

3.3. ELECTRICAL

Voltage: + 12VDC

Power: 1.2 Watts

3.4. PHYSICAL

Number of slots: 1

Revision 1.1 500ADA-3

Frame Manual

500ADA Analog Video Distribution Amplifier

4. STATUS LEDS

The 500ADA has two LED Status indicators on the front card edge to show operational status of the card

at a glance. Figure 3 shows the location of the LEDs.

Two large LEDs on the front of the board indicate the general health of the module

LOCAL FAULT: This Red LED indicates poor module health and will be On if a local input power

fault exists (i.e.: a blown fuse). The LOCAL FAULT indication can also be reported

to the frame through the FRAME STATUS jumper.

MODULE OK: This Green LED indicates good module health. It will be On when the board power

is good.

5. Circuit Description

The input signal enters the board through a BNC with isolated ground so that balanced input processing

may be done to remove any common mode hum that may have been added to the signal and ground

shield. On-board jumpers allow you to configure the input impedance and input coupling (AC/DC).

An adjustable gain stage feeds three separate OP-Amps drive the nine output BNC's with 75-Ohm output

impedance.

6. JUMPERS AND USER ADJUSTMENTS

FRAME STATUS

OFF

+12V GND

GAIN

MODULE STATUS

(2)500ADA

75R

HI-Z

TERM

INPUT

Figure 3: LED and Jumper Locations

500ADA-4 Revision 1.1

Frame Manual

500ADA Analog Video Distribution Amplifier

6.1. SELECTING WHETHER LOCAL FAULTS WILL BE MONITORED

BY THE GLOBAL FRAME STATUS

The FRAME STATUS jumper J1, located at the front of the module determines whether local faults (as

shown by the Local Fault indicator) will be connected to the 500FR frame's global status bus.

FRAME STATUS: To monitor faults on this module with the frame status indicators (on the power

supply’s FRAME STATUS LED's and on the Frame's Fault Tally output) install this

jumper in the On position.

When this jumper is installed in the Off position local faults on this module will not

be monitored.

6.2. SELECTING THE INPUT TERMINATION

The input termination may be set via card jumper J5 to either 75 Ohms (default) or Hi-Z (34k Ohms). Set it

to Hi-Z when using a "T" connector to loop the signal through several device inputs.

6.3. SELECTING THE INPUT AC/DC COUPLING

The input may be AC or DC (default) coupled into the input-circuitry using jumper J4. Use AC coupling in

applications when the input signal has a large (>2V) DC level. In some non-video applications that do not

have DC information (i.e. digital AES audio), AC coupling can be used to remove any DC level that may

have built up in its transmission.

6.4. GAIN ADJUSTMENT

The GAIN POT on the cards front edge allows you to adjust the input signal level. Turning the POT

clockwise will increase the gain.

There is enough range on this control to counteract the video level error due to a

missing or double terminated coaxial connection. This will hide a frequency

response problem due to the mis-termination.

Revision 1.1 500ADA-5

Frame Manual

500ADA Analog Video Distribution Amplifier

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500ADA-6 Revision 1.1

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