evertz 7700DA‑DS3 User manual

evertz
Brand
evertz
Model
7700DA‑DS3
Category
Video line amplifiers
Type
User manual
7700 MultiFrame Manual
7700DA-DS3 DS3 Distribution Amplifier
Revision 1.2
TABLE OF CONTENTS
1. OVERVIEW.......................................................................................................................................... 1
2. INSTALLATION................................................................................................................................... 2
3. SPECIFICATIONS............................................................................................................................... 3
3.1. INPUTS....................................................................................................................................... 3
3.2. OUTPUTS................................................................................................................................... 3
3.3. ELECTRICAL ............................................................................................................................. 3
3.4. PHYSICAL.................................................................................................................................. 3
4. STATUS LEDS.................................................................................................................................... 4
5. JUMPERS AND USER ADJUSTMENTS............................................................................................ 5
5.1. SELECTING WHETHER LOCAL FAULTS WILL BE MONITORED
BY THE GLOBAL FRAME STATUS .......................................................................................... 5
5.2. SELECTING THE OUTPUT MODE.............................................................................................. 5
5.3. SELECTING THE INPUT ISOLATION MODE............................................................................ 6
5.4. SETTING THE TRANSMIT LEVEL............................................................................................. 6
Figures
Figure 1-1: 7700DA-DS3 Block Diagram..............................................................................................................1
Figure 2-1: 7700DA-DS3 Rear Panels..................................................................................................................2
Figure 5-1: Jumper Locations for 7700DA-DS3 Cards .........................................................................................5
7700 MultiFrame Manual
7700DA-DS3 DS3 Distribution Amplifier
Revision 1.2
REVISION HISTORY
REVISION DESCRIPTION DATE
1.0 Preliminary Version May 01
1.1 First revision for DS3 only product Oct 01
1.2 General format clean up. Updated features & block diagram. Sept 09
7700 MultiFrame Manual
7700DA-DS3 DS3 Distribution Amplifier
Revision 1.2 Page - 1
1. OVERVIEW
The 7700DA-DS3 Distribution Amplifier provides automatic coaxial cable equalization, reclocking and
signal distribution of DS3 (44.736 Mb/s) telecommunications signals. The 7700DA-DS3 accepts a B3ZS-
encoded Alternate Mark Inversion (AMI) input signal and provides four reclocked G.703 compliant output
signals.
The 7700DA-DS3 occupies one card slot and can be housed in a 1RU frame which will hold up to 3
modules, a 3RU frame which will hold up to 15 modules, a 350FR portable frame which will hold up to 7
modules or a standalone enclosure which will hold 1 module.
Features:
• Supports DS3 (44.736Mb/s)
• Accepts B3ZS-encoded AMI input signals
• Automatic cable equalization for up to 1000ft of high quality 75Ω cable
• Signal reclocking and optional jitter attenuator
• Output wave shaping for DS3 standards compliance
• High/Low output amplitude setting for long/short cable lengths
• Loss of signal (LOS) detection/indication
• Outputs 1’s pattern generation upon loss of input signal
• Electrical output drive level control for enhanced distance
• Transformer coupled inputs/outputs
• Input/output transient protection
Line
Decoding Jitter
Attenuation
Adaptive
Equalizer
Cable
Drivers
Line
Encoding
Drive Level
Controls
Control/
Indication
Module
Health
Signal
Valid
Output
Status
Jitter Control
Clock
Recovery
4 Serial DS3
Ouptuts
Serial DS3
Input
Output Pattern
Figure 1-1: 7700DA-DS3 Block Diagram
7700 MultiFrame Manual
7700DA-DS3 DS3 Distribution Amplifier
Page - 2 Revision 1.2
2. INSTALLATION
The 7700DA-DS3 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 2-1: 7700DA-DS3 Rear Panels
INPUT: Isolated input BNC for DS3 (44.736 Mb/s) signals. This input is also transformer coupled to
meet G.703 requirements. A jumper is available on the main board, to allow the isolated BNC
shield to be connected to DC ground or AC ground.
OUTPUT: There are four BNC connectors with transformer coupled, reclocked outputs.
7700 MultiFrame Manual
7700DA-DS3 DS3 Distribution Amplifier
Revision 1.2 Page - 3
3. SPECIFICATIONS
3.1. INPUTS
Standards: G.703 @ 44.736 Mb/s
Connector: Isolated BNC per IEC 61169-8 Annex A
Equalization: Automatic 300m with Belden 8281 or equivalent cable
Return Loss: > 20 dB up to 44 Mb/s
3.2. OUTPUTS
Number of Outputs: 4 Per Card-Reclocked
Connector: BNC per IEC 61169-8 Annex A
Waveform: Conforms to G.703 compliant masks
Return Loss: > 18 dB up to 44.736 Mb/s
3.3. ELECTRICAL
Voltage: + 12VDC
Power: 6 Watts
EMI/RFI: Complies with FCC regulations for class A devices
Complies with EU EMC directive
3.4. PHYSICAL
Number of slots: 1
7700 MultiFrame Manual
7700DA-DS3 DS3 Distribution Amplifier
Page - 4 Revision 1.2
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 the Signal Valid is Off, or Output Fault is On or when
there is a fault in the module power supply.
SIGNAL VALID: This Green LED will be On when the input signal satisfies amplitude requirements.
OUTPUT FAULT: This Red LED will be On when an output fault or output connection error exists.
7700 MultiFrame Manual
7700DA-DS3 DS3 Distribution Amplifier
Revision 1.2 Page - 5
5. JUMPERS AND USER ADJUSTMENTS
LOCAL FAULT / MODULE OK
SIGNAL VALID
OUTPUT FAULT
OUTPUT
RCLK/BYP/PRBS
SFF POWER
+12V
FRAME STATUS
EVERTZ (1) 7700DA-DS3
ON / OFF COUPLING
FLOAT / GND
J30
LEVEL 1
HI / LOW
J17
LEVEL 2
HI / LOW
LEVEL 3
HI / LOW
LEVEL 4
HI / LOW
J19
J21
J22
J14
J7
Figure 5-1: Jumper Locations for 7700DA-DS3 Cards
5.1. SELECTING WHETHER LOCAL FAULTS WILL BE MONITORED
BY THE GLOBAL FRAME STATUS
The FRAME STATUS jumper J7, located at the top 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: To monitor faults on this module with the frame status indicators (on the Power
Supply FRAME STATUS LEDs 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.
5.2. SELECTING THE OUTPUT MODE
The OUTPUT jumper J14, located on the center front of the module, is a three position jumper that sets
the output mode of the DA.
OUTPUT: To select the normal reclocking mode set the jumper to the RCLK position (default). This
provides signal reclocking for the DS3 signal. The output defaults to a ‘1010…’ pattern on loss
of input signal.
To bypass signal reclocking set the jumper to the BYP position. This position is useful for
performing system diagnostics.
Set the jumper to the PRBS position to output a ‘1010…’ test pattern for additional diagnostics
testing.
7700 MultiFrame Manual
7700DA-DS3 DS3 Distribution Amplifier
Page - 6 Revision 1.2
5.3. SELECTING THE INPUT ISOLATION MODE
The COUPLING jumper J30, located at the rear of the module beside the input BNC, is a two position
jumper that sets whether the shield of the input BNC connector will be AC or DC coupled to ground.
COUPLING: When set to the GND position, the shield of the input BNC will be connected directly to the
logic ground of the DA.
When set to the FLOAT position, the shield of the input BNC will be AC coupled to the logic
ground of the DA.
5.4. SETTING THE TRANSMIT LEVEL
The four LEVEL jumpers, J17, J19, J21 and J22 located at the rear of the module beside the four output
BNCs, set the transmit level for the signal on the adjacent BNC output connector.
LEVEL: When the cable length connected to the output is less than 225 feet (68.5 meters) set the
jumper to the LOW position in order to meet the DSX-3 pulse specification.
When the cable length connected to the output is greater than 225 feet (68.5 meters) set the
jumper to the HIGH position in order to meet the DSX-3 pulse specification.
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evertz 7700DA‑DS3 User manual

evertz
Brand
evertz
Model
7700DA‑DS3
Category
Video line amplifiers
Type
User manual
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