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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[phone]

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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

Installation

Module Placement In Frame

8901, 8902, and 8906 Analog Video DA modules can be installed in Gecko
8900 frames and also older version (legacy) 8500 or 8800 Grass Valley
frames.

Remote monitoring is available only with an 8906 module installed in a
Gecko 8900TFN-V or 8900TFN video frame (with an 8900NET module
installed).

Note

8900 Analog Video DA modules installed in 8500 frames require a trace cut
as shown in Figure 4 on page 14.

Gecko 8900 Frame

There are ten cell locations in the 8900 video frame to accommodate mod­ules. These are the left ten locations (Figure 2).

The two cells on the right are allocated for the power supplies. For addi­tional information concerning the Power Supply module, refer to the 8900
Power Supply manual.

The third cell from the right is allocated for the Frame Monitor or 8900NET
Network Interface module. These modules provide health monitoring and
control options for modules with remote monitoring and control capability.

Figure 2. Gecko 8900 Series Frame

Any 8900 Module

Frame Controller or

8900NET Network

Interface Module

12 8901/8902/8906 Instruction Manual

Power

Supplies

(only)

8271_04

1.

2.

3.

Installation

8900 Frame Capacity

These modules can be installed in all Gecko 8900 video frames but with
varying maximum quantities determined by frame cooling capacity.

Table 3 provides the power capacity, cooling capacity, and maximum

module count for each frame type.

Table 3. Video Frame Power Capacity

Capacity Calculated 8900TX Frame 8900TF Frame 8900TFN Frame

Power (W) 100 100 100
Recommended Module Cooling (W) 30 90 90
8900 DA Modules 10 10 10

DA10

J1 J2

O

J3 J4

U

T

J5 J6

DA9

J1 J2

J2

O

J3 J4

J4

U

T

J5 J6

J6

Note

Module capacity figures assume no other modules are in the frame.

To install a module in the frame:

Insert the module, connector end first, with the component side of the
module facing to the right and the ejector tab to the top.

Verify that the module connector seats properly against the backplane.

Press in the ejector tab to seat the module.

Note

Figure 3. Gecko 8900 Series Video Frame Rear Connector

J1 J2

J3 J4

J5 J6

8900 module slots are interchangeable within the frame. There are 10 BNCs
in each slot’s I/O group. The functional assignment of each connector in a
group is determined by the module that is placed in that slot. The maximum
number of modules a Gecko 8900 video frame can accept is ten. Figure 3
illustrates the rear connector plate for a Gecko 8900 video frame.

DA8

O
U
T

DA7

J1 J2

J2

O

J3 J4

J4

U

T

J5 J6

J6

DA6

J1 J2

O

J3 J4

U
T

J5 J6

DA5

J1 J2

J2

O

J3 J4

J4

U
T

J5 J6

J6

DA4

J1 J2

O

J3 J4

U
T

J5 J6

DA3

J2

J1 J2

O

J4

J3 J4

U

T

J6

J5 J6

DA2

J1 J2

O

J3 J4

U

T

J5 J6

J1 J2

J3 J4

J5 J6

DA1

O
U

T

J7 J8

J9 J10

IN

J7 J8

J8

J9 J10

IN

J7 J8

J9 J10

IN

J7 J8

J8

J9 J10

IN

J7 J8

J9 J10

IN

J7 J8

J8

J9 J10

IN

J7 J8

J9 J10

IN

J8

J7 J8

J9 J10

IN

J7 J8

J9 J10

IN

J7 J8

J9 J10

IN

8271_03

8901/8902/8906 Instruction Manual 13

Installation

8500 Frames

Modules installed in an 8500 frame must first be modified with a trace cut
in order to work properly. Cut the trace in the place indicated by the silk­screen on the module as illustrated in Figure 4.

GAIN

EQ

Note

Figure 4. Module Trace Cut for 8500 Frame Operation

GRASS VALLEY 8901 ANALOG VIDEO DA
8902
8906

J2

Cutting the trace will disable the module for use in an 8800 or 8900 frame. If
the module is needed in a newer frame type, the cut trace may be bridged.

J4

J5

JP3

8271_10

DA10

J1

O
U

J3

T

J5

IN

J9 J10

DA9

J2

J1

O
U

J3

J4

T

J6

J6

J5

IN

J9 J10

The 8500 frame provides the same looping BNC analog input with six
outputs as shown in Figure 5. Remote control with the 8900NET module is
not available in the 8500 frame.

Figure 5. 8500 Frame Rear BNCs

DA8

J2

J1

O
U

J3

J4

J6

J6

J5

IN

J9 J10

T

DA7

J2

J1

O
U

J3

J4

T

J6

J6

J5

IN

J9

DA6

J2

J1

O
U

J3

J4

T

J6

J6

J5

IN

J10

J9

J2

J1

J3

J4

J6

J6

J5

J10

J9 J10

DA5

O
U

T

IN

DA4

J2

J1

J3

J4

J6

J6

J5

J9 J10

O
U
T

IN

DA3

J2

J1

J3

J4

J6

J6

J5

J9 J10

O
U
T

IN

DA2

J2

J1

J3

J4

J6

J6

J5

J9 J10

O
U

T

IN

J2

J1

J3

J4

J6

J5

J9 J10

DA1

J2

O
U

J4

T

J6

8271_08

IN

14 8901/8902/8906 Instruction Manual

8800 Frames

Cabling

Installation

The 8800 frame provides the same looping BNC analog input with eight
outputs (Figure 3 on page 13). Remote control with the 8900NET module is
not available in the 8800 frame.

Refer to Figure 6 for cabling the 8900 Analog Video DA module in an
8900/8800 frame. Only the first six outputs are available when a module is
installed in the 8500 frame. Cabling to and from the module is done at the
back of the video frame as described below.

Note

At the back of every hardcover manual are overlay cards that can be placed
on the rear connector BNCs to identify the specific connector functions.

Loop-Through Input

One analog video input is provided at loop-through BNCs J9 and J10. If the
unused input is not looped to another device, it should be terminated in
75

Ω .

Outputs

There are eight outputs from each 8900 Analog Video DA module at BNCs
J1 through J8. Output destination equipment should have an input imped­ance of 75
loop-through inputs must be terminated into 75

Figure 6. 8900 DA Rear Input/Output Connectors

Analog output

Analog output

Analog output

Ω unless it has loop-through inputs, in which case the

Ω .

J3

DAx

O

U
T

J2

J4

J2J1

J4

Analog output

Analog output

Analog output

J6

J8

J6

Analog output

J8

8271_01

Analog output

Loop-through

Analog Video Input

J5

J7

J9 J10

IN

8901/8902/8906 Instruction Manual 15

Power Up

Power Up

The front LED indicators and configuration switches are illustrated in

Figure 7. Upon power-up, the green PWR LED present on all module types

should light.

Figure 7. LEDs and Configuration Switches

GRASS VALLEY 8901 ANALOG VIDEO DA
8902

FAULT

8906

COMM

PWR

GAIN

EQ

Operation Indicator LEDs

Refer to Figure 7 and Table 4 for the name and meaning of each of the board
edge operating indicators on the module circuit board.

Table 4. Board Edge LED Names and Meaning

LED Indication Condition

FAULT

(red)

8906 only

COMM

(yellow)

8906 only

PWR

(green)

Off Normal operation.

On continuously 8906 module has detected an internal fault.

Long Flash Input missing and report loss of signal function is enabled.

Off No activity on frame communication bus.

Short flash

Off No power to module or module’s DC/DC converter failed.

On continuously Normal operation, module is powered.

Activity present on the frame communication bus or Locate Module command received by the
module from a remote control system.

8271_02

16 8901/8902/8906 Instruction Manual

Module Adjustments

The following adjustments can be made from front edge and on-board con­trols on the module circuit board. There are no remote control adjustments.

Gain Adjustment

Overall gain of the outputs on these modules can be adjusted ± 2 dB with
the front edge GAIN potentiometer R1. To adjust gain:

1.

Connect one of the output BNCs to a waveform monitor.

2.

Adjust the input signal to the desired amplitude with the GAIN
potentiometer.

Module Adjustments

Equalization Adjustment

On the 8902 and 8906 modules, equalization can be fine tuned with the
front edge EQ potentiometer, R2.

To fine turn equalization:

Connect a test signal such as Multiburst (up to 20 MHz) to the module

1.

input and terminate the unused loop-through input.

Use the front edge EQ potentiometer to adjust for equal frequency

2.

response on the multiburst signal while monitoring an output from the
module.

White Clip Adjustment

The white clip level of the signal can be set with the White Clip Level
adjustment, R95. The adjustment range is from 500 mV to 1200 mV.

To adjust the white clip:

Set jumper JP3 to On (pins 2-3) and place the module on an extender if

1.

possible.

Connect an output BNC to a waveform monitor.

2.

Connect 100% Color Bars to the input. Use one of the following

3.

methods to make the adjustment:

a.

Unterminate the output you are monitoring and adjust the white
portion of the signal to be below 1 V.

Leave the output terminated and adjust the white portion to clip

b.

where desired for your application.

8901/8902/8906 Instruction Manual 17

Remote Monitoring

Remote Monitoring

8906 module monitoring can be performed using a web browser GUI inter­face when the 8900NET Network Interface module is present in the Gecko
8900TFN-V frame. Remote monitoring is not possible with the 8500 or 8800
frames. This section describes the GUI access to the available module func­tions.

Refer to the 8900NET Network Interface Module Instruction Manual for infor­mation on the 8900NET Network Interface module and setting up and
operating the Gecko 8900 frame network.

Note For optimal performance and access to the latest features, it is recommended

Refer to the Frame Status page shown in Figure 8 on page 19. The 8900
modules can be addressed by clicking either on a specific module icon in
the frame status display or on a module name or slot number in the link list
on the left.

that the 8900NET module be updated to the latest software release. Check the
Grass Valley web site for the current 8900NET software.

Note The physical appearance of the menu displays on the web pages shown in

this manual represent the use of a particular platform, browser and version
of 8900NET module software. They are provided for reference only. Displays
will differ depending on the type of platform and browser you are using and
the version of the 8900NET software installed in your system.

Use the Refresh button to update the display (available with 8900NET soft­ware version 3.2.0 and later).

The

Online Manual Link button can be set up to link to the documentation in

pdf format. Link configuration is done on the Frame Configuration page.

For information on status and fault monitoring and reporting shown on the
Status page, refer to Status Monitoring on page 30.

18 8901/8902/8906 Instruction Manual

Figure 8. Frame Status Page

8270_04

The Links section lists the frame and its current modules. The selected link's Status
page is first displayed and the sub-list of links for the selection is opened. The sub-list
allows you to select a particular information page for the selected device.

Content display section displays the information page
for the selected frame or module (frame slot icons are also
active links).

Online Manual Link

Refresh button for manual
update of page

Remote Monitoring

8901/8902/8906 Instruction Manual 19

Remote Monitoring

Links and Web Pages

The 8900 GUI provides the following links and web pages for the 8906
module (Figure 9):

• Status – reports input and frame bus status and module information
(page 21),

•Video Input Status – status reporting for the video input can be enabled
or disabled (page 22),

• Slot Config – provides a Locate Module function and Slot Memory
(page 23), and

• Software Update – gives information about software updating
(page 25).

Figure 9. 8906 Web Page Links

20 8901/8902/8906 Instruction Manual

Status Web Page

Remote Monitoring

Use
this
link

The Status web page (Figure 10) shows the signal status of the analog video
input and frame bus communication. Color coding of the display indicates
the signal status. Refer to Status Monitoring on page 30 for an explanation
of the color coding.

Information about the module, such as part number, serial number, hard­ware revision and software versions are given in a read-only section at the
bottom of the display.

Figure 10. 8906 Status Web Page

8901/8902/8906 Instruction Manual 21

Remote Monitoring

Video Input Status Web Page

Use
this
link

The Video Input Status web page (Figure 10) allows enabling or disabling
reporting of signal loss.

To enable loss of signal reporting, select
reporting of signal loss, select

Disabling this control will gray out the Input signal on the Status web page
graphic shown in Figure 10 on page 21.

No.

Yes from the pulldown. To disable

Press the

Figure 11. 8906 Video Input Status Web Page

Apply button to enter the selection.

22 8901/8902/8906 Instruction Manual

Slot Config Web Page

Use the Slot Config web page (Figure 12 on page 24) to perform the fol­lowing functions on the 8906 module:

Remote Monitoring

Use
this
link

•

Locate Module – selecting the Flash radio button flashes the COMM and

FAULT LEDs on the front of the module so it can be located in the
frame.

•

Slot Identification – You may identify the module by typing a specific

name in the
module and travels with the 8900NET module if it is moved to another
frame. Select

•

Slot Memory – the slot configuration for each media module is automati-

cally saved periodically (once an hour) to the 8900NET module in that
frame. You may also select the
save the current configuration for this slot. The configuration is saved
on the 8900NET module. If the 8900NET module is removed or
powered down, the stored configurations are not saved.

When the
ration saved to this slot is saved as slot memory. When the current
module is removed and another module of the same type is installed,
the configuration saved to the 8900NET module will be downloaded to
the new module. The box must be checked before the current module
with the saved configuration is removed.

•

Hardware Switch Controls – a read-only status report of 8900NET module

switch settings for Module Status Reporting and Asynchronous Status
Reporting. These functions must be enabled for the following Slot
SNMP Trap Reports to function.

Name field. The assigned name is stored on the 8900NET

Default to enter the factory default module name.

Learn Module Config button at any time to

Restore upon Install box has been checked, the current configu-

•

Slot SNMP Trap Reports – displayed only when the SNMP Agent software

has been installed on the 8900NET module. Slot SNMP traps can be
enabled only when the hardware switches for Module Fault reporting
and Asynchronous Status reporting are in enabled on the 8900NET
module (dipswitch S1 segment 7 and dipswitch S2 segment 1).

The enabled SNMP traps will be reported to any SNMP manager that
is identified as an SNMP Report Destination in 8900NET configuration.
Trap severity is read-only hard-coded information that is interpreted
and responded to by the SNMP Manager software configuration.

SNMP reporting can be also be disabled for the video input on the
Video Input Status web page (page 22).

8901/8902/8906 Instruction Manual 23

Remote Monitoring

Figure 12. 8937 Slot Config Page

24 8901/8902/8906 Instruction Manual

Use
this
link

Remote Monitoring

Software Update Web Page

The Software Update web page (Figure 13) indicates that module software
updates via the web or using the NetConfig networking application are not
supported.

For complete software updating instructions for the 8906, refer to the
release notes included with the software upgrade.

Figure 13. 8906DA Software Update Web Page

8901/8902/8906 Instruction Manual 25

Specifications

Specifications

Table 5. 8901, 8902, 8906 Analog Video DA Module Specifications

Parameter Value
Analog Video Input

Number of inputs 1 (BNC loop-through)
Impedance Passive high impedance differential loop-through
Input format Analog video: NTSC, PAL, SECAM, RGB, YUV, Tri-level sync
Input level Video 1 V p-p, Subcarrier up to 2 V p-p
Return loss > 40 dB up to 5 MHz
CMRR > 66 dB 50/60 Hz
Common mode input range ± 10 V

Analog Video Outputs

Number of outputs 8 in 8900/8800 frame, 6 in the 8500 frame
Output impedance 75 Ω
Signal level 1 V p-p ± 2 dB
Return loss > 40 dB up to 5 MHz
Output DC < 50 mV

Performance

Frequency Response 8901 and 8902:

± 0.025 dB to 5 MHz
± 0.05 dB to 8 MHz
–1 dB at 16 MHz
8906:
± 0.05 dB to 5 MHz
± 0.1 dB to 8 MHz
–1 dB at 16 MHz

Cable Equalization Dual range supported by on-board jumper on 8902 and 890 6only:

0-500 ft. (150 m) J2: pins 1-2 and 3-4

500-1000 ft. (150-300 m) J2: pins 2-3 and 4-5
Differential gain < 0.1%
Differential phase < 0.1 degree
Gain adjustment range ± 2 dB
Tilt < 0.5%
Coupling AC/DC, DC restore and Dual speed clamp on 8906
Clamp hum rejection (8906) Slow: > 34 dB, Fast: > 46 dB
Electrical length 8901 and 8902: 20 ns, 8906: 22 ns

Environmental

Operating temperature range See operating specifications for frame type
Operating humidity range 0 to 90% non-condensing
Non-operating temperature –10 to 70 degrees C

Mechanical

Frame type Gecko 8900 Video, 8800, 8500 (with trace cut on module)

Power

Power consumption < 2.3 W

26 8901/8902/8906 Instruction Manual

Functional Description

Refer to the block diagram in Figure 14 for the following functional
description.

Note Feature functionality depends on the module type. Refer to Table 1 on page 7

for a feature comparison between module types.

Input Amplifier

The 8900 Analog Video DA module buffers the incoming video before it is
fed to the equalizer section. The common mode rejection ratio (CMRR) is
set at the factory by balancing the input bias between the differential
inputs. The AC/DC restorer and clamp circuit correction voltage is fed
back to the buffer for the final stage of DC restoration.

Figure 14. 8900 DA Functional Block Diagram

Functional Description

Input

Buffer

Factory

calibrated

CMRR

DC Restore/Clamp

correction voltage

Remote control/monitoring

Gain

Adjust

Equalizer (8902 and 8906)

EQ

Adjust

DC Restore/

Clamp (8906)

Microcontroller

(8906)

8906

White

Clip

Adjust

Output
Drivers

Analog

Outputs

8271_09

Equalizing Amplifier

The equalizing amplifier is formed by two video op-amp circuits working
in parallel. Equalization is accomplished by balancing between the two
amplifier’s values with a front edge EQ adjustment. On-board jumpers
must be set to select the cable length EQ range from either 0–500 ft. or
500–1000 ft.

8901/8902/8906 Instruction Manual 27

Functional Description

Output Driver

Microprocessor

Power Supply

The output driver is formed by a buffer after the equalization amplifier and
four video op-amps that drive eight 75 Ω loads, each amplifier driving two
loads.

The microprocessor present on the 8906 module, monitors module health
and video presence and standard. This information is reported to the frame
via the Frame bus and can be accessed from the web GUI or a control panel
when an 8900NET module is installed in the 8900TFN-V frame.

The ± 5 volts needed by the module is generated from the ± 12 volt input.
Both inputs are fused and noise suppressed. Two linear regulators form the
± 5 volts.

28 8901/8902/8906 Instruction Manual

Service

Service

The 8900 Analog Video DA modules make extensive use of surface-mount
technology and programmed parts to achieve compact size and adherence
to demanding technical specifications. Circuit modules should not be ser­viced in the field unless directed otherwise by Customer Service.

If your module is not operating correctly, proceed as follows:

•Check frame and module power LEDs.

•Verify power at the voltage testpoints (see Figure 15) and check fuses if
no voltage is detected.

•Check for presence and quality of input signals.

•Verify that source equipment is operating correctly.

•Check cable connections.

Refer to Figure 7 on page 16 for the location of PWR LED and Table 4 on

page 16 for proper LED indications.

If the module is still not operating correctly, replace it with a known good
spare and return the faulty module to a designated Grass Valley repair
depot. Call your Grass Valley representative for depot location.

Refer to the Contacting Grass Valley at the front of this document for the
Grass Valley Customer Service Information number.

Figure 15. 8900 DA Fuse and Voltage Testpoint Locations

GRASS VALLEY 8901 ANALOG VIDEO DA
8902
8906

J1

Voltages

+12V

+5V

GND

–5V

–12V

J1

1

2

Fuses: 2 A Slow

125 V

F1

F2

F2A 125V

F2A 125V

8271_07

8901/8902/8906 Instruction Manual 29

Status Monitoring

Status Monitoring

This section provides a summary of status monitoring and reporting for a
Gecko 8900 Series system. It also summarizes what status items are
reported and how to enable/disable reporting of each item. There are a
number of ways to monitor status of modules, power supplies, fans and
other status items depending on the method of monitoring being used.

8900 Frame status will report the following items:

• Power supply health,

• Status of fans in the frame front cover,

•Temperature,

•Module health, and

• Frame bus status.

Module health status will report the following items:

• Internal module state (and state of submodule or options enabled)
including configuration errors (warning), internal faults, and normal
operation (Pass).

LEDs

• Signal input states including valid/present (pass), not present or
invalid (warning), not monitored, and not available (no signal inputs).

•Reference input states including locked/valid (pass), not
locked/invalid (warning), and not monitored.

• Signal output states with reporting functionality (reference output).

LEDs on modules in the frame and on the front of the 8900TF/TFN frames
indicate status of the frame and the installed power supplies, fans in the
front covers, and modules. (The 8900TX-V/A frames have no LED indica­tors on the front cover.)

When a red FAULT LED is lit on a frame front cover, the fault will also be
reported on the 8900NET or Frame Monitor module. The LEDs on the front
of these modules can then be read to determine the following fault condi­tions:

• Power Supply 1 and 2 health,

• Fan rotation status,

• Frame over-temperature condition,

• Frame Bus fault (8900NET only), and

•Module health bus.

30 8901/8902/8906 Instruction Manual

Frame Alarm

Status Monitoring

In general, LED colors used on the frame and modules indicate:

•Green – normal operation, (Pass) or signal present, module locked.

•Red – On continuously = fault condition, flashing = configuration error.

•Yellow – On continuously = active condition (configuration mode or

communication), flashing in sequence = module locator function.

Status LEDs for this module are described in Operation Indicator LEDs on

page 16. LEDs for the 8900NET module are described in the 8900NET

Network Interface Instruction Manual.

A Frame Alarm connection is available on pins 8 and 9 of the RS-232 con­nector on the rear of the 8900 frame (Frame Monitor or 8900NET Network
Interface module required). This will report any of the status items enabled
with the 8900NET or Frame Monitor module configuration DIP switch.
Connection and use of the Frame Alarm is covered in detail in the 8900NET

Network Interface Instruction Manual.

Web Browser Interface

When the 8900NET module is installed in the frame, a web browser GUI
can indicate frame and module status on the following web pages:

• Frame Status page – reports overall frame and module status in graph-

ical and text formats.

•Module Status page – shows specific input and reference signal status

to the module along with enabled options and module versions.

•A Status LED icon on each web page to report communication status

for the frame slot and acts as a link to the Status page where warnings
and faults are displayed (8900NET version 3.2.0 or later).

In general, graphics and text colors used indicate the following:

•Green = Pass – signal or reference present, no problems detected.

•Red = Fault – fault condition.

•Yellow = Warning – signal is absent, has errors, or is mis-configured.

•Gray = Not monitored (older 8900 module).

•White = Not present.

Status reporting for the frame is enabled or disabled with the configuration
DIP switches on the 8900NET module. Most module status reporting items
can be enabled or disabled on individual configuration web pages.

8901/8902/8906 Instruction Manual 31

Status Monitoring

SNMP Reporting

The Gecko 8900 Series system uses the Simple Network Monitoring Pro­tocol (SNMP) internet standard for reporting status information to remote
monitoring stations. When SNMP Agent software is activated on the
8900NET module, enabled status reports are sent to an SNMP Manager
such as the Grass Valley’s NetCentral application.

There are both hardware and software report enable switches for each
report. Both must be enabled for the report to be sent. Software report
switches are set on the 8900NET Configuration page for the Frame, the
8900NET module, and each module slot. Refer to the 8900NET Network
Interface Instruction Manual for installation instructions.

Signal loss reporting for the module can be enabled or disabled on the
Video Input Status web page (page 22).

32 8901/8902/8906 Instruction Manual

Index

Numerics

8500 frames 14
8800 frames 15
8900 frame

frame alarm
module capacity 13
status reporting 30

8900NET module

for remote monitoring
installation 12

8901 module

summary

8901, 8902, 8906 modules

adjustments
block diagram 27
feature comparison 7
features 7
functional description 27

8902 module

summary

8906 module

remote control
summary 8

8

8

A

AC/DC coupling

jumper

11

B

31

17

20

18

connectors 13
controller module 12

D

DC Restore

jumper

documentation online 2, 18

11

E

enable SNMP 32
environmental 26
equalization

front edge adjustment
jumper 10

17

F

FAQ database 2
fast clamp 11

jumper 11

FAULT LED

states

16

troubleshooting 30
Frame Controller module 12
Frame Status page 31
frequently asked questions 2
functional description 27
fuses 29

backplane 13

G

C

cabling 15
clamp

jumper
COMM LED 16
configuration

Remote, GUI

8901/8902/8906 Instruction Manual 33

11

18

Gain adjustment 17
Gecko frame 12, 26
graphical user interface (GUI) 20
Grass Valley web site 2

I

input

Index

cabling 15
specifications 26

installation 9

J

jumpers

AC/DC coupling
DC Restore 11
equalization 10
settings table 9
White Clip enable 11

11

L

LEDs

front edge
Names and Meanings table 16

locate module 23

16

M

module

controller
installation 12
power supply 12

slots 13
module health status 30
Module Status web page 31

12

R

rear connectors 13
Refresh button 18
repair depot 29
report enable switches 32

S

signal loss

reporting
Slot Config web page 23
slot memory 23
slow clamp 11

jumper 11
SNMP reporting

enabling

overview 32
software download from web 2
Software Update web page 25
status monitoring 30
Status web page 21

22, 32

23

T

testpoints 29
trace cut for 8500 frame 14
troubleshooting 29

O

online documentation 2

Online Manual Link 18
Online Manual Link 18
outputs

cabling

specifications 26

15

P

power 26
power supply 12
power up 16
PWR LED 16

34 8901/8902/8906 Instruction Manual

V

Video Input Status web page 22
voltage tespoints 29

W

web site documentation 2
web site FAQ database 2
web site Grass Valley 2
web site software download 2
White Clip

jumper

White Clip adjustment 17

11