GRASS VALLEY 8910ADA-M - User manual

8910ADA-M/ST/SR
ANALOG AUDIO DISTRIBUTION AMPLIFIER
Instruction Manual
SOFTWARE VERSION 1.0.0
071815605
NOVEMBER 2008

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8910ADA-M/ST/SR
ANALOG AUDIO DISTRIBUTION AMPLIFIER
Instruction Manual
SOFTWARE VERSION 1.0.0
071815605
NOVEMBER 2008

4 8910ADA-M/ST/SR — Instruction Manual
Contacting Grass Valley
Copyright © Thomson. All rights reserved.
This product may be covered by one or more U.S. and foreign patents.
Grass Valley Web Site
The www.thomsongrassvalley.com web site offers the following:
Online User Documentation — Current versions of product catalogs, brochures,
data sheets, ordering guides, planning guides, manuals, and release notes
in .pdf format can be downloaded.
FAQ Database — Solutions to problems and troubleshooting efforts can be
found by searching our Frequently Asked Questions (FAQ) database.
Software Downloads — Download software updates, drivers, and patches.
International
Support Centers
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(available
during normal
business hours)
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8910ADA-M/ST/SR — Instruction Manual 5
Contents
Preface. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
About This Manual . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
8910ADA-M, -ST, -SR Analog Audio Distribution Amplifier . . . . . . . . . . . 9
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Gecko 8900 Frame . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Frame Capacity. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Module Placement in the 8900 Frame. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
GeckoFlex Frame . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Module Installation Precautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Rear Module Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Front Module Installation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Cabling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Inputs. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Outputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Hard-wired Potentiometers (8910ADA-SR Only). . . . . . . . . . . . . . . . . . . . . . . 16
Hard-wired Fine Gain/Balance Potentiometer Control . . . . . . . . . . . . . . . . . 18
Power Up . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Operation Indicator LEDs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Module Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Onboard 8910ADA-M and -ST Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Monaural or Stereo Mode (-ST Module Only). . . . . . . . . . . . . . . . . . . . . . . . . . 22
Output Gain Select. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Fine Gain Potentiometers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Onboard 8910ADA-SR Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Local or Remote Control. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Output Mode Select. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Phase Inversion . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Gain and Balance Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
Power Cycle and Control Settings. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
Remote Configuration and Monitoring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
8910ADA-M/ST Remote Configuration and Monitoring . . . . . . . . . . . . . . . . 27
8910ADA-SR Remote Configuration and Monitoring . . . . . . . . . . . . . . . . . . . 27
8900NET Module Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
Newton Control Panel Configuration. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
Web Browser Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
8910ADA-SR Links and Web Pages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
Status Web Page. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
Audio Status/Controls Web Page. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
Recall/Save User Settings Web Page . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
Slot Config Web Page . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
Software Updating . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
Equipment Required. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41

6 8910ADA-M/ST/SR — Instruction Manual
Contents
Acquiring Software Updates. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
Specifications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
Status Monitoring. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
LEDs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
Frame Alarm . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
Web Browser Interface. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
SNMP Reporting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
Service . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46
Functional Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48
8910ADA-M/-ST. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48
Analog Circuitry . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49
Microprocessor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50
Power Supply. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50
8910ADA-SR . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51
Inputs and Outputs. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52
Processor Section. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52
Analog Audio Path . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52
Power Supplies . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53
Input Level Detectors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53
Hard-wired Fine Gain and Balance Potentiometers . . . . . . . . . . . . . . . . . . . . 53
Index. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55

8910ADA-M/ST/SR — Instruction Manual 7
Preface
About This Manual
This manual describes the features of a specific 8900 module in the Gecko
and GeckoFlex Signal Processing System families. As part of this module
family, it is subject to Safety and Regulatory Compliance described in the
Gecko 8900 and GeckoFlex Series frame and power supply documentation.
See the Gecko 8900 Frame Instruction Manual and the GeckoFlex Frames
8900FX/FF/FFN Instruction Manual that can be found on-line in PDF format
at this link:
www.thomsongrassvalley.com/docs/modular

8 8910ADA-M/ST/SR — Instruction Manual
Preface

8910ADA-M/ST/SR — Instruction Manual 9
8910ADA-M, -ST, -SR Analog
Audio Distribution Amplifier
Introduction
The 8910ADA modules are low cost, high-density analog audio distribu-
tion amplifiers (DAs) available in eight output monaural (-M) or four
output stereo (-ST) versions, and four stereo remote (-SR). All versions are
designed for use in the 8900 Audio frames that provide input and output
miniature screw-down audio connectors or in the GeckoFlex frame using
an 8900A-R rear module. Each channel of the stereo has its own gain and
threshold controls.
The monaural DA has eight balanced outputs and the stereo DA has four
balanced outputs for each channel. Onboard jumpers on the -M and -ST
modules provide stepped gain control in 6 dB increments while a front
edge onboard potentiometer provides fine adjustment.
The -SR version is stereo with remote control ability using the web browser
or Newton Control Panel or it can be used in Local control mode using front
edge paddle switches for setting overall gain and balance and two
hard-wired gain and balance potentiometers for fine adjustment.
The 8910ADA features:
• Hot swappable modules,
• Overall gain adjustment using the front edge paddle switches (plus fine
gain and balance adjustment ± 6 dB with hard-wired pots on the -SR)
• Jumper selectable 6 dB gain steps from -12 dB to +30 dB on -M and -ST
modules,
• AC coupled audio path reducing DC offsets at output,
• Balanced low impedance outputs to drive bridging inputs,
• Maximum differential output level +24 dBu (12.28 V RMS) for -M and
-ST modules, and
• Maximum differential output level +28 dBu (19.47 V RMS) for
-SR modules.

10 8910ADA-M/ST/SR — Instruction Manual
Installation
Installation
The 8910ADA can be installed in either an 8900 Gecko or GeckoFlex frame.
An 8900A-R rear module is required for use in the GeckoFlex frame.
Gecko 8900 Frame
Installation of the 8910ADA module in an 8900 Gecko frame is a process of:
1. Setting local onboard jumper settings if using Local controls,
2. Placing the module in the proper frame slot, and
3. Cabling signal ports.
The 8910ADA module can be plugged in and removed from an 8900 Series
Audio frame with power on. When power is applied to the module, LED
indicators reflect the initialization process (see Power Up on page 19).
Frame Capacity
The maximum number of 8910ADA-M/ST modules can be installed in all
8900 Series Audio frames since the maximum power consumption and heat
generation is below frame cooling capacity. A maximum of six
8910ADA-SR modules can be used in a 30 Watt frame. Table 1 provides the
power capacity, cooling capacity, and maximum module count for each
frame type.
Note Module capacity figures assume no other modules are in the frame.
Table 1. Power, Cooling, and Module Capacity of 8900 Audio Frames
Capacity Calculated
8900TX-A
Frame
(no fan)
8900TF-A
Frame
8900TFN-A
Frame
Power (W) 100 100 100
Recommended Module Cooling (W) 30 90 90
8910ADA-M Modules 10 10 10
8910ADA-ST Modules 10 10 10
8910ADA-SR Modules 6 10 10

8910ADA-M/ST/SR — Instruction Manual 11
Installation
Module Placement in the 8900 Frame
There are ten slot locations in the frame to accommodate either analog or
digital modules. These are the left ten locations. Refer to Figure 1.
The two slots on the right are allocated for the power supplies. For addi-
tional information concerning the Power Supply module, refer to the Gecko
8900 Frames Instruction Manual.
The third slot from the right is allocated for the controller module—either
a Frame Monitor Module or a 8900NET Network Interface Module. For
additional information concerning the controller module options, refer to
the 8900NET Network Interface Module Instruction Manual.
Figure 1. 8900 Series Audio Frame Slots
Frame Controller or
8900NET Module (only)
Power
Supplies
(only)
8156_04r1
8900 Audio Media Module

12 8910ADA-M/ST/SR — Instruction Manual
Installation
8900 module slots are interchangeable within the frame. There are 10
three-terminal connectors and 4 BNC connectors 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 an
8900 frame can accept is ten. Figure 2 illustrates the rear connector plate for
an 8900 Series Audio frame.
Figure 2. 8900 Series Audio Frame Rear Connectors
To install a module in Gecko frame:
1. If using local onboard controls, set jumpers on the module circuit
board. Refer to Onboard 8910ADA-M and -ST Configuration on page 22
or Onboard 8910ADA-SR Configuration on page 24 before installing the
front module.
2. Insert the module, connector end first, with the component side of the
module facing to the right and the ejector tab to the top.
3. Verify that the module connector seats properly against the backplane.
4. Press in the ejector tab to seat the module.
8156_02
J1
J3
J5
J7
J9
J2
J4
J6
J8
J10
J11
J13
J12
J14
IN
1
J1
J3
J5
J7
J9
J2
J4
J6
J8
J10
J11
J13
J12
J14
IN
2
J1
J3
J5
J7
J9
J2
J4
J6
J8
J10
J11
J13
J12
J14
IN
3
J1
J3
J5
J7
J9
J2
J4
J6
J8
J10
J11
J13
J12
J14
IN
4
J1
J3
J5
J7
J9
J2
J4
J6
J8
J10
J11
J13
J12
J14
IN
5
J1
J3
J5
J7
J9
J2
J4
J6
J8
J10
J11
J13
J12
J14
IN
6
J1
J3
J5
J7
J9
J2
J4
J6
J8
J10
J11
J13
J12
J14
IN
7
J1
J3
J5
J7
J9
J2
J4
J6
J8
J10
J11
J13
J12
J14
IN
8
J1
J3
J5
J7
J9
J2
J4
J6
J8
J10
J11
J13
J12
J14
IN
9
J1
J3
J5
J7
J9
J2
J4
J6
J8
J10
J11
J13
J12
J14
IN
10

8910ADA-M/ST/SR — Instruction Manual 13
Installation
GeckoFlex Frame
Installation of the 8910ADA module in a GeckoFlex frame is a process of:
1. Installing the 8900A-R rear module into the rear of the frame,
1. Setting jumpers on the module circuit board if using local onboard
controls,
2. Placing the 8910ADA module in the corresponding front frame slot,
and
3. Cabling and terminating signal ports.
Module Installation Precautions
Please read and follow the precautions listed below before installing the
front and rear modules:
• Use standard anti-static procedures during installation. As modules
can be installed or removed when the GeckoFlex frame is powered up,
before removing the cover, please use an anti-static bracelet tied to a
metal part of the frame.
• Install the rear module first, then the front module, then the optical sub-
module option (if used).
• When installing or removing a rear module, loosen or tighten the
screws holding the retainer clips to the frame manually with the
retainer clip tool provided inside the front cover of the frame (751-
version frames only). For 650- version frames without the tool, use a
2 mm (5/64”) hex screwdriver. Please do not use an electric screw-
driver.
• Make every effort to leave the screws holding the retainer clips in place
(do not remove them completely). They are very small and can easily
drop into other equipment causing a shorting hazard. (Two turns of the
screw should be enough to loosen the screws, 3 turns or more will
remove it.)
• When installing a rear module, tighten the screws on the retainer clips
just until snug. Do not apply more force than is necessary to seat the
rear module. Refer to the Mechanical specification for the 8900A-R rear
retainer clip screw torque in Table 6 on page 42.

14 8910ADA-M/ST/SR — Instruction Manual
Installation
Rear Module Installation
To install a rear module into GeckoFlex frame, follow these steps:
Note Please read Module Installation Precautions on page 13 before installing the
rear module.
1. Each 8900A-R rear module or blank rear adapter cover is held in place
by two retainer clips as shown in Figure 3. Loosen (but do not remove
completely) the two screws holding each retainer clip to the frame with
a 2 mm (5/64”) hex screwdriver. Pull up on the retainer to remove it,
leaving the screws in place.
CAUTION Be careful to leave the screws in place as they can be easily lost or fall into
equipment below the frame creating a shorting hazard.
2. Remove the blank rear adapter cover by inserting needlenose pliers
into the slots in the top and bottom of the blank and pulling it off.
Note To remove a rear module already installed, follow the same steps. It is helpful
to first remove the front module so the rear can be pulled out more easily.
3. Insert the rear module into the empty slot.
4. Replace each retainer clip over the two screws on both sides of the
module and push down to seat the retainer.
5. Tighten the screws for each retainer clip just until they are snug. Do not
force or torque the screws too tightly. The rear retainer clip screw torque
specification is 4-5-inch-lb./0.45-0.60Nm.
Figure 3. Installing Rear Module
Use needlenose pliers
to pull out blank after
removing retainers.

8910ADA-M/ST/SR — Instruction Manual 15
Installation
Front Module Installation
After installing the rear module, install the front module as follows:
1. If using local onboard controls, set jumpers on the module circuit board
as required. Refer to Onboard 8910ADA-M and -ST Configuration on
page 22 or Onboard 8910ADA-SR Configuration on page 24 before
installing the front module.
2. Remove the front cover of the frame.
3. Locate the corresponding front slot.
4. Insert the front module so that the plastic card guides on the module
top and bottom edges go over the upper and lower raised rail guides on
the right of the top and bottom of the slot(Figure 4).
5. Carefully slide the module into the rear connector.
6. Lock the front module ejector tab into the locking pin.
7. Reinstall the front cover of the frame during normal operation.
Figure 4. Front Module Installation
Slide top and bottom card carriers on module
over top and bottom guides on right of slot.
Module installed
Locking Pin
Front Module Side View
0642_10r0

16 8910ADA-M/ST/SR — Instruction Manual
Installation
Cabling
Cabling for the module in the Gecko frame is shown in Figure 5 on page 17.
For the GeckoFlex frame, refer to the 8900A-R rear module illustration in
Figure 6 on page 17.
Inputs
Unbalanced input loop-through input connectors, J13 or J14 are not used
for 8910ADA modules. A balanced input connects to connector J9 for the
8910ADA-M. The stereo 8910 ADA-ST accepts inputs from connectors J9
(Channel 1) and J10 (Channel 2).
Outputs
The 8910ADA-M has eight balanced outputs using connectors J1 through
J8. The 8910ADA-ST and SR have four balanced outputs per channel using
connectors J1, J3, J5, and J7 for Channel 1 and J2, J4, J6, and J8 for Channel 2.
Note The input mode to the Ch 1 and Ch 2 outputs can be chosen from Ch 1, Ch 2,
or the sum of both channels with local or remote controls.
8900-A-CBL Option
An audio breakout cable assembly consisting of four three-terminal to dual
BNCs can be purchased as an option for unbalanced outputs.
Hard-wired Potentiometers (8910ADA-SR Only)
For hard-wiring the fine Gain and Balance potentiometers to BNC J11 and
J12, refer to Hard-wired Fine Gain/Balance Potentiometer Control on page 18.

8910ADA-M/ST/SR — Instruction Manual 17
Installation
Figure 5. 8910ADA Cabling in Gecko Frame
Figure 6. 8910ADA Cabling in GeckoFlex Frame – 8900A-R Rear
J2
J1
J3
J5
J7
J9
J2
J4
J6
J8
J10
J11
J13
J12
J14
IN
1
J2
J1
J3
J5
J7
J9
J2
J4
J6
J8
J10
J11
J13
J12
J14
IN
1
+ - G
8156_03
Eight Outputs
(J1-J8)
Stereo
Four Ch 1
Outputs
Four Ch 2
Outputs
Not Used
Used only on
-SR module
for remote
Gain control
Ch 1 Input
Used only on
-SR module
for remote
Balance control
Ch 2 Input
Monaural
Not Used
Not Used
Ch 1 Input
Not Used
Not Used
8900A-R 8900A-R
Eight Outputs
(J1-J8)
Monaural
Not Used
Not Used
Ch 1 Input
Not Used
Not Used
Pin3
Pin2
Pin1
Pin1
Pin2
Pin3
+
_
G
Pin3
Pin2
Pin1
+
_
G
G
_
+
Pin1
Pin2
Pin3
G
_
+
8156_14r0
Stereo
Four Ch 1
Outputs
(J1, J3, J5, J7)
Four Ch 2
Outputs
(J2, J4, J6, J8)
Not Used
Used only on
-SR module
forhard-wired
fine Gaincontrol
Ch 1 Input
Used only on
-SR module
forhard-wired
fine Balance control
Ch 2 Input

18 8910ADA-M/ST/SR — Instruction Manual
Installation
Hard-wired Fine Gain/Balance Potentiometer Control
On the 8910ADA-SR module only, BNCs J11 and J12 can be connected to
external hard-wired customer-supplied potentiometers for fine (± 6 dB)
gain and balance adjustment respectively. Overall gain and balance (-12 dB
to +30 dB) are set with the front edge paddle switches as explained below.
Note The hardwired potentiometer controls are active only when the module is
jumpered for LOC/POT control. The Local/Remote position disables these
ports. Refer to Figure 11 on page 24.
When both local paddle switch adjustments and hard-wired potentiometer
adjustments are made, the following input gain relationships exist:
• Input 1 gain = hard-wired potentiometer gain + paddle switch gain -
paddle switch balance - hard-wired potentiometer balance
• Input 2 gain = hard-wired potentiometer gain + paddle switch gain +
paddle switch balance + hard-wired potentiometer balance
These relationships will be reported on the Audio Status/Control web page
in read-only mode similar to the one shown in Figure 16 on page 33. When
the gain or balance is changed using a paddle switch or one of the potenti-
ometers, the web page will update when the user manually refreshes it.
Figure 7 provides a schematic diagram for constructing a user-supplied
hard-wired control circuit to connect to these BNCs.
Figure 7. User-supplied Hard-wired Fine Gain and Balance Control Circuits
Connect to J11 for
potentiometer fine gain adjust
Connect to J12 for
potentiometer fine balance adjust
10 k
CW*
* Clockwise rotation increases gain for gain pot and
increases gain for channel 2 while decreasing gain
for channel 1 for balance pot.
8156_10r1

8910ADA-M/ST/SR — Instruction Manual 19
Power Up
Power Up
The front LED indicators for the -M and -ST versions of the module are
illustrated in Figure 8 and the -SR version is illustrated in Figure 9. Upon
power-up, the green PWR LED should light and the red FAULT LED should
illuminate briefly for the duration of processor initialization.
Operation Indicator LEDs
With proper microprocessor supply voltage present (+5 V), the green PWR
LED will be illuminated. The yellow COMM ED should illuminate when
communication to or from the module processor is detected.
A red FAULT LED indicates a processor error situation.
Figure 8. -M and -ST LEDs
Figure 9. 8910ADA-SR LEDs
8156_05r1
R5
R6
FAULT (red)
COMM (yellow)
PWR (green)
OVR (yellow)
8156_08r1
FAULT (red)
COMM (yellow)
CONF (yellow)
PWR (green)
SW2
SW1
Channel 1 Present (green)
Channel 2 Present (green)

20 8910ADA-M/ST/SR — Instruction Manual
Power Up
Note The yellow COMM and CONF LEDs are used for the module location function
that is enabled using the GUI. The module location function causes these
LEDs to flash concurrently three times followed by an off state of 900 ms
duration. The locate mode can be turned off by toggling the paddle switch on
the module.
Table 2 (-M and -ST modules) and Table 3 (-SR module) show the possible
LED indications and conditions they indicate.
Table 2. 8910ADA-M/ST Indicator LEDs and Conditions Indicated
Version LED Indication Condition
-M & ST
FAULT
(red)
Off Normal operation.
On continuously Module has detected an internal fault.
Long flash Configuration problems. Check inputs and settings.
COMM
(yellow)
Off No activity on frame communication bus.
Short flash Activity present on the frame communication bus.
PWR
(green)
Off No power to module or module’s DC/DC converter failed.
On continuously Normal operation, module is powered.
Table 3. 8910ADA-SR Indicator LEDs and Conditions Indicated
Version LED Indication Condition
-SR
FAULT
(red)
Off Normal operation.
On continuously Module has detected an internal fault.
Long flash Configuration problems. Check inputs and settings.
COMM
(yellow)
Off No activity on frame communication bus.
3 short on, 1 long off in
sync with CONF LED Location Command received by the module from a remote control system.
Short flash Activity present on the frame communication bus.
CONF
(yellow)
Off Module is in normal operating mode.
3 short on, 1 long off in
sync with COMM LED Location Command received by the module from a remote control system.
On continuously Module is initializing, changing operating modes or updating firmware.
PWR
(green)
Off No power to module or module’s DC/DC converter failed.
On continuously Normal operation, module is powered.
PRESENT 1
(green)
Off Input 1 signal is less than selected threshold setting (-20, -40 or -60 dBu).
On continuously Input 1 signal is greater than selected threshold setting (-20, -40 or -60 dBu).
PRESENT 2
(green)
Off Input 2 signal is less than selected threshold setting (-20, -40 or -60 dBu).
On continuously Input 2 signal is greater than selected threshold setting (-20, -40 or -60 dBu).
OVR
(yellow)
Off In Local/Remote mode, remote settings match local jumper settings on module.
On continuously In Local/Remote mode, remote settings are overriding local jumper settings.