evertz 7700 Series User manual

7700 Series DTV Frame Manual
7700ADA Analog 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...................................................................................................................................3
5. JUMPERS AND USER ADJUSTMENTS...........................................................................................4
5.1. TERMINATION JUMPER ..........................................................................................................4
5.2. SELECTING WHETHER LOCAL FAULTS WILL BE MONITORED
BY THE GLOBAL FRAME STATUS.........................................................................................5
5.3. GAIN CONTROL .......................................................................................................................5
5.4. DC LEVEL CONTROL...............................................................................................................5
Figures
Figure 1: 7700ADA Block Diagram .....................................................................................................................1
Figure 2: 7700ADA Rear Panel...........................................................................................................................2
Figure 3: Jumper Locations for Rev A 7700ADA Cards .....................................................................................4
Revision 1.2

7700 Series DTV Frame Manual
7700ADA Analog Distribution Amplifier
REVISION HISTORY
REVISION DESCRIPTION DATE
1.0 Original Version Jan 00
1.1 Block diagram, and Jumper location drawing added Mar 00
1.2 Specifications updated Mar 01
Revision 1.2

7700 Series DTV Frame Manual
7700ADA Analog Distribution Amplifier
1. OVERVIEW
The 7700ADA Analog Distribution Amplifier is a general purpose amplifier for distributing analog signals.
The 7700ADA features one balanced input with four outputs. The 7700ADA 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.
Features:
• 75 Ohm or high impedance input (jumper selectable)
• Looping feature with external "T" connector
• Consistent input impedance if card power is lost
• High common mode range and common mode rejection ratio (CMMR)
• Gain and DC level control (non clamping)
Analog
outputs
Analog
Input
Amplifier
75
Ω
Gain DC Level
Buffer
Differential
Input
Figure 1: 7700ADA Block Diagram
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7700 Series DTV Frame Manual
7700ADA Analog Distribution Amplifier
2. INSTALLATION
The 7700ADA comes with a companion rear plate that has 5 BNC connectors. For information on
mounting the rear plate and inserting the module into the frame see the 7700FR chapter section 3.
Figure 2: 7700ADA Rear Panel
ANALOG INPUT Input (isolated) BNC connector for analog video signals. The TERM jumper located
on the module near this BNC connector determines whether the input signal will be
high impedance or terminated with 75 ohms. (See section 5.1)
ANALOG OUTPUT There are four BNC connectors with level and DC adjusted copies of the input
signal.
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7700 Series DTV Frame Manual
7700ADA Analog Distribution Amplifier
3. SPECIFICATIONS
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
Equalization: None
Return Loss: > 25 dB up to 30MHz
Common mode range: 6Vp-p
CMRR: >75dB at 60Hz
>45dB at 100kHz
Return loss: >30dB up to 30MHz
Signal amplitude: 2.5Vp-p max
3.2. ANALOG VIDEO OUTPUTS
Number of Outputs: 4 Per Card
Connector: BNC per IEC 169-8
Signal Level: 1x gain +3.5dB, -2.5dB
DC Offset: settable ±200mV
Freq. Response: TBD (flat to 30MHz)
Differential Gain: TBD
Differential Phase: TBD
3.3. ELECTRICAL
Voltage: + 12VDC
Power: 1.2 Watts.
3.4. PHYSICAL
Number of slots: 1
4. STATUS LEDs
MODULE OK This Green LED will be On when the module is operating properly.
LOCAL FAULT This Red LED will be On when there is a fault in the module power supply.
D5, D6 These Green LEDs will be On when sufficient positive and negative voltages on the
power supply rails is detected.
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7700 Series DTV Frame Manual
7700ADA Analog Distribution Amplifier
5. JUMPERS AND USER ADJUSTMENTS
LOCAL FAULT / MODULE OK
D5
EVERTZ (A) 7700ADA
GAIN
J13
FRAME
STATUS
ON
OFF
D6
J4
TERM
UNTERM
SFF POWER
+12V
DC LEVEL
Figure 3: Jumper Locations for Rev A 7700ADA Cards
5.1. TERMINATION JUMPER
The TERMINATION jumper J4, located at the rear of the module near the input BNC determines whether
the input signal will be terminated with 75 ohms or not.
When set in the "TERM" position, the input impedance is set to 75Ohm. Use this position when the cable
stops at this card. It will provide the proper impedance to eliminate electrical reflections.
If set to "UNTERM", the input will be high impedance. Use this position when the signal does NOT stop at
this card. Install a "T" connector on the ANALOG INPUT BNC to "loop" the signal through this card.
!WARNING: Make sure that the final destination of the signal is terminated into a
75 Ohm load. Otherwise, reflections will occur affecting the signal throughout the
cable.
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7700 Series DTV Frame Manual
7700ADA Analog Distribution Amplifier
5.2. SELECTING WHETHER LOCAL FAULTS WILL BE MONITORED
BY THE GLOBAL FRAME STATUS
The FRAME STATUS jumper J13, located at the front of the module determines whether local faults (as
shown by the Local Fault indicator) will be connected to the 7700FR frame's global status bus.
FRAME STATUS The FRAME STATUS jumper J22 located at the front of the module determines
whether local faults (as shown by the Local Fault indicator) will be connected to the 7700FR
frame's global status bus.
To monitor faults on this module with the frame status indicators (on the PS FRAME STATUS
LED's and on the Frame's Fault Tally output) install this jumper in the On position. (Default)
When this jumper is installed in the Off position, local faults on this module will not be
monitored.
5.3. GAIN CONTROL
Turn the multi-turn GAIN control potentiometer clockwise to increase the gain through the card. The GAIN
control is set at the factory to maintain unity gain through the amplifier.
5.4. DC LEVEL CONTROL
Turn the multi-turn DC LEVEL control potentiometer clockwise to increase the DC level of the signal
through the card. Note that this is NOT a clamping amplifier and thus will handle a wider variety of signals
than if it were clamping. However, it will not remove varying DC levels.
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7700 Series DTV Frame Manual
7700ADA Analog Distribution Amplifier
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7700ADA-6 Revision 1.2