Grass Valley 8901 User Manual
8901/8902/8906
ANALOG VIDEO DISTRIBUTION AMPLIFIERS
Instruction Manual
SOFTWARE VERSION 1.0.0
071827100
FEBRUARY 2004
Contacting Grass Valley
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Copyright © Thomson Broadcast and Media Solutions All rights reserved.
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Support: (530) 478-3181
+852-2802-2996
Grass Valley
P.O. Box 599000
Nevada City, CA 959597900 USA
www.thomsongrassvalley.com
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2 8901/8902/8906 Instruction Manual
Contents
Preface
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
About This Manual . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
8901/8902/8906
Analog Video DA Modules
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
8901 Video DA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
8902 Video DA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
8906 Video DA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
On-board Jumper Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Equalization – J2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
DC Restore/AC or DC Coupling – J4 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Clamp – J5 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
White Clip – JP3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Module Placement In Frame . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Gecko 8900 Frame . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
8500 Frames. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
8800 Frames. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Cabling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Loop-Through Input . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Outputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Power Up . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Operation Indicator LEDs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Module Adjustments . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Gain Adjustment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Equalization Adjustment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
White Clip Adjustment. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Remote Monitoring. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Links and Web Pages. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Status Web Page. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Video Input Status Web Page. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Slot Config Web Page . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Software Update Web Page . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
Functional Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
Input Amplifier . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
Equalizing Amplifier. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
Output Driver. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
Microprocessor. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
Power Supply. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
Service. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
Status Monitoring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
8901/8902/8906 Instruction Manual 3
Contents
LEDs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
Frame Alarm . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
Web Browser Interface. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
SNMP Reporting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
Index
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
4 8901/8902/8906 Instruction Manual
Preface
About This Manual
This manual describes the features of a specific module of the Gecko 8900
Signal Processing System. As part of this module family, it is subject to
Safety and Regulatory Compliance described in the Gecko 8900 Series
frame and power supply documentation (see the
Frames Instruction Manual
8900TX/8900TF/8900TFN
).
8901/8902/8906 Instruction Manual 5
Preface
6 8901/8902/8906 Instruction Manual
8901/8902/8906 Analog Video DA Modules
Introduction
The 8901, 8902 and 8906 Analog Video Distribution Amplifier modules are
a series of precision DAs for distributing analog video. All modules offer
excellent differential gain and phase and common mode rejection specifications.
Each 8900 DA module features:
• Passive differential loop-through input for excellent common mode
hum rejection even when cable runs are adjacent to AC Mains cables,
•Distribution of NTSC, PAL, SECAM, RGB, YUV, and Tri-level Sync
video,
• Installs in the 8900, 8800, and 8500 Grass Valley frames with:
• Eight outputs in 8900 and 8800 Series frames,
• Six outputs in 8500 Series frames, and
•Card edge gain control.
A comparison of module functions for the 8900 Analog Video DA Series is
given in Table 1.
Table 1. 8900 Analog Video DA Comparison
Function 8901 8902 8906
Card edge gain adjustment X X X
DC/AC coupling X X X
DC restoration – X X
Card-edge adjust equalization – X X
Fast or slow clamping – – X
White clip threshold adjustment – – X
Remote monitoring – – X
8901/8902/8906 Instruction Manual 7
Introduction
8901 Video DA
8902 Video DA
The 8901 is a utility DA ideal for short cable runs of high quality signals. A
flat frequency response and impressive signal-to-noise ratio enable high
quality copies of the input signal to all eight outputs.
The 8902 Equalizing DA offers the same features as the 8901 Utility DA as
well as input cable equalization which accurately compensates for attenuation and phase errors induced in long cable runs. The cable equalization
is custom-designed for each specific cable type. In addition to the DC and
AC coupling modes is a DC restoration mode which smoothly restores the
blanking level DC component to zero volts.
8906 Video DA
The 8906 Clamping DA with input presence detection offers the same features as the 8901 and 8902 modules plus a dual speed clamp which provides flexibility with clamp-induced noise versus single-ended hum
rejection. A white clip control can be enabled to eliminate positive-going
pulses above a user-selected threshold.
Also included on the 8906 module is a video presence detection circuit that
generates SNMP traps when video is not present. Control of SNMP
reporting can be enabled and disabled by the user with the available
remote controls in 8900 video frames.
8 8901/8902/8906 Instruction Manual
Installation
On-board Jumper Settings
1.
3.
Installation of the 8900 Analog Video DA modules is a process of:
Setting on-board module jumper settings for desired operation
(page 9),
2.
Placing the module in the proper video frame slot (page 12), and
Cabling and terminating signal ports (page 15).
The DA module can be plugged in and removed from the frame with
power on. When power is applied to the module, LED indicators reflect the
initialization process (see Power Up on page 16).
Installation
Each 8900 Analog Video DA module requires jumper settings to determine
the desired operating modes as outlined in Table 2 and shown in Figure 1.
Table 2. On-board Jumper Settings
Jumper/Function 8901 8902 8906
J2 – Equalization N/A
J4 – Coupling
J5 – Clamp (8906) N/A N/A
JP3– White Clip (8906) N/A N/A On or Off
Figure 1 on page 10 illustrates each of the on-board jumpers on the circuit
board. Note that depending on the model, some components may not be
present. For details on setting each jumper, refer to the specific jumper
headings given in this section.
DC or AC
Coupling
0 – 500’ or 500 – 1000’
(0 – 150 m or 150 – 300 m)
DC Restore, DC, or AC coupling DC Restore, DC, or AC coupling
0 – 500’ or 500 – 1000’
(0 – 150 m or 150 – 300 m)
Clamp On or Off,
Fast or Slow clamp
8901/8902/8906 Instruction Manual 9
Installation
GAIN
EQ
Figure 1. On-board Jumpers
GRASS VALLEY 8901 ANALOG VIDEO DA
8902
8906
Equalizer for specific cable
type should be installed
in J3 for 8902 and 8906.
J3
J2
EQUALIZATION
(8902 and 8906)
0' – 500' (1-2 and 3-4)
WHITE CLIP
(8906 only)
OFF (1-2)
ON (2-3)
J4
J5
J5
COUPLING
J4
DC RESTORE (1-2)
DC COUPLED (3-4)
AC COUPLED (5-6)
CLAMP
(8906 only)
ON (1-2)
ON (3-4)
FAST (5-6)
JP3
JP3
8271_06
1
J2
500' – 1000' (2-3 and 4-5)
Equalization – J2
On the 8902 and 8906 modules, an equalizer for the specific cable type
being used with this module is installed in location J3.
Set jumper J2 to match your maximum cable length as follows:
•0 to 500 ft. (150 m) – set J2 to pins 1-2 and 3-4.
• 500 ft. (150 m) to 1000 ft. (300 m) – set J2 to pins 2-3 and 4-5.
Use the front edge EQ adjustment, R2, to fine tune the equalization as
described in
Equalization Adjustment
on page 17.
10 8901/8902/8906 Instruction Manual
DC Restore/AC or DC Coupling – J4
On all of these modules, set jumper J4 for the type of coupling desired:
• DC Restore (8902 and 8906) – set J4 to pins 1-2 for DC restoration. DC
restoration smoothly restores the blanking level DC components to
zero volts. This DC restoration circuit functions with or without synchronization pulses and can therefore be used with GBR or YUV signals.
• DC Coupled – set J4 to pins 3-4 for DC Coupled mode. The DC Coupled
mode is recommended when distributing color difference signals (B-Y,
R-Y) or for simple non-reclocking fanout distribution of AES/EBU
1 V p-p coaxial digital audio signals.
• AC Coupled – set J4 to pins 5-6 for AC Coupled mode. Use the AC
Coupled mode when the incoming video signal has its blanking level
at anything other than zero volts.
Installation
Clamp – J5
The 8906 module has a clamp control that can be enabled or disabled and
the clamp speed set to fast or slow. When enabled, the clamping function
will override the coupling mode set with jumper J4.
On the 8906 module, set jumper J5 to enable and disable clamping and set
clamping speed as follows:
•Clamp Off – remove the shorting jacks on J5 on pins 1-2 and 3-4. You
may store the shorting jacks on pin 1 and pin 3. The clamp speed
shorting jack on pins 5-6 can be left in any position.
• Fast Clamp On – set the shorting jacks on J5 to pins 1-2, 3-4, and 5-6.
Also set jumper J4 for AC Coupled, pins 5-6. Use a fast clamp for applications where greater hum rejection is required.
• Slow Clamp On – set the shorting jacks on J5 to pins 1-2, and 3-4.
Remove the shorting jack from pins 5-6. Store the jack on pin 5. Also set
jumper J4 for AC Coupled, pins 5-6. Slow clamping is useful in applications where noise suppression is required.
White Clip – JP3
The 8906 module has a White Clip control that can be enabled to eliminate
positive-going pulses above a user-selected threshold set by the White Clip
Level potentiometer, R95.
On the 8906 module, set jumper JP3 to enable or disable the White Clip control:
•White Clip Off – set JP3 to pins 1-2.
•White Clip On – set JP3 to pins 2-3.
8901/8902/8906 Instruction Manual 11
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