Arbitron 1000-1160 Technical Document

EQUIPMENT MANUAL,
ENCODER: 1000-1160
©2010 Arbitron Inc.
Document #: 1050-1473
Date:
Revision: D
July 2010
For Arbitron Encoder Model:
1000-1160-xx 1U SGE Analog Encoder, RoHS Compliant

Equipment Manual
Document # 1050-1473
Rev. D
Arbitron Encoder Model: 1000-1160-xx
©2010 Arbitron Inc. 2
© 2010 Arbitron Inc. All rights reserved. This document may not be reproduced, in whole or
part, without the express written consent of Arbitron Inc. This document and the information
contained within is intended for Arbitron Inc. employees, customers, or authorized recipients
only; its use, in whole or part, for any other purpose without express written permission from
Arbitron Inc. is prohibited. Arbitron Inc. Encoder Model 1000-1160-xx is covered by one or
more U.S. Patent Numbers and their corresponding international patents, and other patents may
be pending. This document includes proprietary and technical information which is the
intellectual property of Arbitron Inc. ARBITRON and any other Arbitron product or service
name or slogan contained in this document are trademarks of Arbitron Inc., registered in the U.S.
and other countries. Patents: http://www.arbitron.com/home/patents.htm

Equipment Manual
Document # 1050-1473
Rev. D
Arbitron Encoder Model: 1000-1160-xx
©2010 Arbitron Inc. 3
Table of Contents
1. CONTACTS .........................................................................................................................................6
1.1. UNITED STATES .................................................................................................................................6
1.2. OUTSIDE THE UNITED STATES ...........................................................................................................6
1.3. LEGAL................................................................................................................................................6
2. DISCLAIMER AND LIMITATION OF LIABILITY .....................................................................7
3. WARNINGS.........................................................................................................................................8
4. INTRODUCTION/OVERVIEW........................................................................................................9
4.1. SUGGESTED PLACEMENT IN AUDIO CHAIN ........................................................................................9
5. INSTALLATION...............................................................................................................................10
6. OPERATIONS...................................................................................................................................13
6.1. INITIATING ENCODING .....................................................................................................................13
6.2. IMMEDIATELY AFTER PLACING THE ENCODER ON-AIR...................................................................13
6.3. BYPASS FEATURES...........................................................................................................................13
6.4. ALARM STATUS REMOTE MONITORING ...........................................................................................15
6.5. THEORY OF OPERATION FOR THE STATUS AND CONTROL RELAYS ..................................................16
6.6. USING THE LCD MENU....................................................................................................................17
6.7. ENCODER OVERHEAT BEHAVIOR.....................................................................................................18
7. ELECTRICAL SPECIFICATIONS ................................................................................................18
7.1. ANALOG SPECIFICATIONS ................................................................................................................18
7.2. ALARM (RELAY)SPECIFICATIONS ....................................................................................................20
7.3. POWER SPECIFICATIONS...................................................................................................................20
8. GENERAL SPECIFICATIONS.......................................................................................................20
8.1. PHYSICAL SPECIFICATIONS ..............................................................................................................20
8.2. ENVIRONMENTAL SPECIFICATIONS ..................................................................................................21
8.3. DATE/TIME CLOCK ACCURACY .......................................................................................................21
APPENDIX A USING THE OPTIONAL TIME DECODER INPUT....................................................23

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Table of Figures
Figure 1: Front Panel of an Arbitron RoHS Compliant Analog SGE............................................. 9
Figure 2: Placement of Arbitron SGE within the Audio Chain.................................................... 10
Figure 3: Rear Panel of Arbitron RoHS Compliant Analog SGE
(with Time Decoder Option installed)........................................................................... 11
Figure 4: XLR Connection Pinouts............................................................................................... 11
Figure 5: DB9 Pinouts for Remote Bypass Monitoring................................................................ 12
Figure 6: DB9 Pinouts for Remote Bypass Control...................................................................... 15
Figure 7: DB9 Pinouts for Remote Alarm Status Monitoring...................................................... 15
Figure 8: Status and Control Relay Connection Scheme.............................................................. 17
Figure 9: Rear Panel of Arbitron RoHS Compliant Analog SGE with Time Decoder Option.... 26

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Table of Tables
Table 1: DB9 Pinouts for Remote Monitoring of Encode/Bypass Status..................................... 12
Table 2: DB9 Pinouts for Remote Control of Encode/Bypass Status........................................... 14
Table 3: DB9 Pinouts for Remote Monitoring of Alarm Status................................................... 15
Table 4: Encoder Overheat Behavior............................................................................................ 18

Equipment Manual
Document # 1050-1473
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Arbitron Encoder Model: 1000-1160-xx
©2010 Arbitron Inc. 6
1. CONTACTS
If you need assistance or have any questions, please contact or call:
1.1. UNITED STATES
For any questions regarding this manual, please contact Arbitron as indicated below:
For Radio:
•Email: [email protected]
•Call: 410.312.8123
For Other Media:
•Email: [email protected]
•Call: 410.312.8199
For any URGENT Encoding Equipment Issues, please contact our 24/7 Encoding Issues
Hotline: [phone]
Arbitron Inc.
Encoding Operations
9705 Patuxent Woods Drive
Columbia, MD 21046-1572
1.2. OUTSIDE THE UNITED STATES
For any questions regarding this manual, please contact Arbitron as indicated below:
Email: [email protected]
Arbitron Inc.
Products Support Engineering
9705 Patuxent Woods Drive
Columbia, MD 21046-1572
1.3. LEGAL
[email protected]
Arbitron Inc.
c/o James Derry, Sr. Attorney
9705 Patuxent Woods Drive
Columbia MD 21046-1572
Phone inquiries should be directed to [phone]

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2. DISCLAIMER AND LIMITATION OF LIABILITY
By your use, receipt, and/or installation of the Arbitron Inc. encoders, you expressly
acknowledge and agree to the foregoing:
Disclaimer of Warranties. YOU EXPRESSLY ACKNOWLEDGE AND AGREE THAT USE
OF ARBITRON INC. ENCODERS AND THIS EQUIPMENT MANUAL IS AT YOUR SOLE
RISK AND THAT THE ENTIRE RISK AS TO SATISFACTORY QUALITY,
PERFORMANCE, ACCURACY AND EFFORT IS WITH YOU. TO THE MAXIMUM
EXTENT PERMITTED BY APPLICABLE LAW, THE ARBITRON INC. ENCODERS AND
EQUIPMENT MANUALS ARE PROVIDED “AS IS”, WITH ALL FAULTS AND WITHOUT
WARRANTY OF ANY KIND, AND ARBITRON INC. HEREBY DISCLAIMS ALL
WARRANTIES AND CONDITIONS, EITHER EXPRESS, IMPLIED, OR STATUTORY,
INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES AND/OR
CONDITIONS OF MERCHANTABILITY, OF SATISFACTORY QUALITY, OF FITNESS
FOR A PARTICULAR PURPOSE, OF ACCURACY, OF QUIET ENJOYMENT, AND NON-
INFRINGEMENT OF THIRD PARTY PATENT, COPYRIGHT, OR OTHER
INTELLECTUAL PROPERTY RIGHTS.
Limitation of Liability. TO THE EXTENT NOT PROHIBITED BY LAW, IN NO EVENT
SHALL ARBITRON INC. BE LIABLE FOR PERSONAL INJURY, OR ANY INCIDENTAL,
SPECIAL, INDIRECT, OR CONSEQUENTIAL DAMAGES WHATSOEVER, INCLUDING,
WITHOUT LIMITATION, DAMAGES FOR LOSS OF PROFITS, LOSS OF DATA,
BUSINESS INTERRUPTION OR ANY OTHER COMMERCIAL DAMAGES OR LOSSES,
ARISING OUT OF OR RELATED TO YOUR USE OR INABILITY TO USE THE
ARBITRON INC. ENCODER, HOWEVER CAUSED, REGARDLESS OF THE THEORY OF
LIABILITY (CONTRACT, TORT OR OTHERWISE) AND EVEN IF ARBITRON INC. HAS
BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES. IN NO EVENT SHALL
ARBITRON INC.'S TOTAL LIABILITY TO YOU FOR ALL DAMAGES (OTHER THAN AS
MAY BE REQUIRED BY APPLICABLE LAW IN CASES INVOLVING PERSONAL
INJURY) EXCEED THE AMOUNT OF ONE HUNDRED DOLLARS ($100.00) IN THE
AGGREGATE.

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3. WARNINGS
To reduce the risk of personal injury, electrical shock, fire, or damage to the Studio Grade
Encoder, DO NOT expose this unit to rain or moisture. Due to the danger of personal injury,
electrical shock, or damage to the instrument, ONLY Arbitron authorized service personnel shall
gain access to the inside of the Studio Grade Encoder. DO NOT disconnect the earth ground
from the power cord since this is a very important safety feature. The Studio Grade Encoder
should be mounted securely in a rack. The sides must be free of obstructions to provide adequate
air- flow through the instrument.
CAUTION: FAILURE TO INSTALL THE ENCODER IN ACCORDANCE WITH THE
SPECIFICATION IN THIS MANUAL AND/OR FAILURE TO MAINTAIN
BROADCAST SIGNALS IN ACCORDANCE WITH GENERAL INDUSTRY
STANDARDS AND SPECIFICATIONS MAY RESULT IN THE ENCODER NOT
OPERATING PROPERLY.
The Studio Grade Encoder contains a lithium battery backup to maintain its internal clock.
Specialized tools are required to replace this part. Under no circumstances should anyone other
than Arbitron authorized service personnel attempt to replace this part.
CAUTION: RISK OF EXPLOSION IF BATTERY IS REPLACED BY AN INCORRECT
TYPE. DISPOSE OF USED BATTERIES ACCORDING TO THE BATTERY
MANUFACTURER'S INSTRUCTIONS.

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4. INTRODUCTION/OVERVIEW
The Studio Grade Encoder (SGE) is a device that inserts inaudible symbols into the audio stream
of broadcasts according to the Critical Band Encoding Technology (CBET) algorithms. The
symbols are easily received and recorded by a Portable People Meter (PPM) when exposed to the
encoded broadcasts.
Arbitron provides a number of different interface models for the SGE. This manual references
models that provide the interface to an analog audio chain using industry standard XLR
connectors.
The Arbitron encoder listed on the title page of this manual has been designed to meet the
requirements of the European Union's directive 2002/95/EC, commonly known as RoHS
(Restriction of Hazardous Substances) Compliance. This directive restricts the use of certain
hazardous substances in electrical and electronic equipment. RoHS seeks to reduce the amount of
hazardous materials entering electronic products.
2 4 5 6 7 831
Figure 1: Front Panel of an Arbitron RoHS Compliant Analog SGE
The front panel of the SGE is pictured in Figure 1, and the front panel features are described
below;
1. LED for power status
2. Smart Media Memory Card Interface dust cover. Behind this cover is the Smart Media
Memory Card Interface, which is used for software upgrades.
3. LED for Smart Media Status (Green indicates a valid card is detected)
4. Service Port
5. LED for Encoding Status
6. Two switch controls (primarily for LCD menu controls)
7. LCD (Displays operation status)
8. Enable/Bypass dual action push button
4.1. SUGGESTED PLACEMENT IN AUDIO CHAIN
Arbitron Inc. has worked closely with numerous broadcast entities, including radio, TV and
cable, and has developed recommendations for the encoder’s optimal operation within your
audio chain. Ultimately, however, decisions regarding placement of the Arbitron encoder within
the audio chain are the responsibility of each individual broadcast facility.

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In AM radio stations, Arbitron recommends that the encoder is installed after the final audio
processor (i.e. Orban Optimod, Telos Systems’ Omnia, or others) to take advantage of the more
consistent audio leveling found at this point in the broadcast chain. In FM stations, Arbitron
recommends that the encoder be installed after a pre-processor and before the final audio
processor (i.e. Orban Optimod, Telos Systems’ Omnia, or others). This is because the encoder
cannot operate on composite audio format output typical of stereo generators. When placing the
Encoder after the audio processor in the signal stream, you should be aware that the signal will
undergo an increase in amplitude roughly equal to 4% modulation. Figure 2 depicts an example
of the encoder placed in the program audio chain.
The encoder operates optimally in an audio stream running a nominal (average) +4 dBu level.
The minimum average input signal level to the encoder is 0 dBu. The encoder accommodates
20 dBu headroom.
Figure 2: Placement of Arbitron SGE within the Audio Chain
5. INSTALLATION
Follow these steps to add the SGE to your equipment chain. Throughout the installation process,
ensure that all plugs are firmly attached to their corresponding sockets.
1. Place the SGE into a 19” rack in an indoor climate controlled environment. Arbitron
recommends allowing ½” of rack space above and below the encoder to allow for adequate
ventilation and reduce the chances of overheating. DO NOT block or otherwise impede
airflow through the sides of the instrument.
2. Secure the SGE using screws in each of the four front panel corners.

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3. Confirm that the Enable/Bypass push button on the front panel is in the ‘out’ position to put
the encoder into bypass mode. (See Figure 1.)
4. If 600 ohm input termination is desired, slide switch S1 on the back of the encoder to 600.
If a 10k ohm input (bridging) impedance is desired, slide switch S1 to H1.
5. Inputs on the SGE are female; thus, the mating XLR cable is required to be male. The
gender for output connections is the reverse of input, as shown in Figure 3.
Figure 3: Rear Panel of Arbitron RoHS Compliant Analog SGE (with Time Decoder Option installed)
Balanced XLR pinouts for the Arbitron SGE are as follows (See Figure 4):
•Pin 1- Shell or ground
•Pin 2- High
•Pin 3- Low
Figure 4: XLR Connection Pinouts
6. FOR STEREO INSTALLATION:
1. Connect the male ends of two XLR cables to the connectors marked A IN and B IN on
the back of the SGE. Connect the female ends of these same two cables to the output
connectors on the device currently outputting the program material to be encoded.
2. Connect the female ends of two XLR cables to the connectors marked A OUT and B
OUT on the back of the SGE. Connect the male ends of these same two cables to the
input connectors on the device to receive the encoded program material.
7. FOR MONO INSTALLATION:
1. Connect the male end of an XLR cable to the connector marked A IN on the back of the
SGE. Connect the female end of this same cable to the output connector on the device
currently outputting the program material to be encoded.

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2. Connect the female end of an XLR cable to the connector marked A OUT on the back of
the SGE. Connect the male end of this same cable to the input connector on the device to
receive the encoded program material.
3. When using the encoder for a mono signal, do not use an A input and a B output—use
the A input and output connectors only. The B output will not be encoded even though
the B output may have audio present.
8. Optional: To allow remote monitoring of this encoder’s bypass and encode modes, use a
DB9 cable to connect a remote bypass device to the male DB9 connector at the back of the
encoder labeled BYPASS MONITOR. The pinouts on this connector are detailed below:
Pin 3 – Common connection
Pin 4 – Bypass mode (pins 3+4 shorted, 3+7 open)
Pin 7 – Encode mode (pins 3+7 shorted, 3+4 open)
Table 1: DB9 Pinouts for Remote Monitoring of Encode/Bypass Status
Status = ENCODE Status = BYPASS
Pin 4 Open to pin 3 Shorted to pin 3
Pin 7 Shorted to pin 3 Open to pin 3
Figure 5: DB9 Pinouts for Remote Bypass Monitoring
The pins are connected to an internal relay of the encoder. The relay contacts are rated at
0.3A max, 24VDC.
This outlet also provides access to a bypass mode remote control functionality and an alarm
status remote monitoring functionality. For more information on these features, see Section
6.3.4 and Section 6.4.
9. If the optional Time Decoder Input is enabled: To ensure that the encoder will
synchronize to the station clock upon boot-up, one of the supported time code sources must
be properly connected to the SGE time code input. For more information, see Appendix A,
“Using the Optional Time Decoder .”

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10. Connect the power cord to the SGE to the same plug strip that supplies power to the
instruments that will be connected to the input and output connectors of the SGE. The SGE
will turn on when power is supplied via the power cord.
11. The SGE is shipped with the Enable/Bypass push button on the front panel set in the ‘out’
position to put the encoder into bypass mode. At initial power-on, the LCD will display
“Bypass Mode Encoder Disabled”. When in bypass mode, the encoder does not encode
incoming signals, but allows them to pass through to the output unchanged. For more
information, see Section 6.3.2, “Master Bypass.”
12. To start encoding, see the instructions in Section 6.1.
6. OPERATIONS
6.1. INITIATING ENCODING
Once the encoder is connected as described in Section 5, follow these instructions to begin
encoding:
1. Push the Enable/Bypass push button on the front panel to the ‘in’ position to enable
Encoding mode.
2. The LCD will then display “Encoding:” and a station specific message (station
information).
3. The Encoding Status LED will display an unblinking green light to indicate normal
operation, and the relays will switch from bypass mode to encoding mode. An audible click
may be heard.
The SGE can be removed from the signal path and put into Bypass mode by pushing the
Enable/Bypass push button on the front panel to the ‘out’ position. This connects the input
connectors directly to their respective output connectors. See Section 6.3 for more information.
6.2. IMMEDIATELY AFTER PLACING THE ENCODER ON-AIR
IMPORTANT: Before the installation of this encoder is considered complete, Arbitron requires
that a quality analysis check be performed on the encoded audio. The time required per encoder
is minimal. Please call your Arbitron contact to arrange this test.
6.3. BYPASS FEATURES
In bypass mode, signals input to the SGE pass through the device unchanged. The SGE provides
bypass features described in the four sections below.
6.3.1. Power Off Bypass
If there is no power applied to the SGE, an internal relay automatically routes the audio input
connectors directly to their respective output connectors, and all input signals pass through the
SGE unchanged.

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6.3.2. Master Bypass
While the SGE is powered, pushing the front panel Bypass/Enable push button to the ‘out’
position causes the SGE to bypass encoding. This effectively routes the audio input connectors to
their corresponding output connectors.
Certain software diagnostic fault detections (including a high temperature warning) can cause the
unit to place itself in bypass mode automatically. In this case, the LCD displays a message
describing the nature of the problem, and the Encoding Status LED on the front panel will
change depending on the nature of the problem.
When the SGE is in bypass mode with no errors, the Encoding Status LED on the front panel
remains dark, and the LCD displays “Bypass Mode Encoder Disabled.”
6.3.3. Bypass Mode Remote Monitor
In addition to providing status information via the front panel LCD display and encoding status
LED indicator, the encoder provides a means to enable remote monitoring of its status. It is
provided via the DB9 connector on the rear panel of the encoder. The 3-wire connection will
allow another device to monitor both bypass mode conditions (power off, Enable/Bypass push
button position, error condition) and encoding conditions (normal power-up, bypass mode,
enable mode). See Step 8in Section 5for pin-out information.
6.3.4. Bypass Mode Remote Control
The encoder provides the means to remotely control whether it is in bypass or enable mode. This
is provided via the DB9 connector on the rear panel labeled BYPASS MONITOR—the same
connector that provides the remote monitor capability. (See Step Error! Reference source not
found. in Section Error! Reference source not found..) To use this feature, connect a 5-20V
DC positive terminal to pin 1 and a negative terminal to pin 6 of the rear panel DB9 connector.
Do not exceed 24V across pins 1 and 6.
The pinouts that support the bypass remote control are detailed below.
Table 2: DB9 Pinouts for Remote Control of Encode/Bypass Status
BYPASS ENABLE
Pin 1 DC (5-20V) positive DC (0 V) positive
Pin 6 DC negative DC negative

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Figure 6: DB9 Pinouts for Remote Bypass Control
6.4. ALARM STATUS REMOTE MONITORING
The encoder provides the means to remotely monitor its error status. This is provided via the
DB9 connector on the rear panel labeled BYPASS MONITOR—the same connector that
provides the remote monitor capability. (See Step Error! Reference source not found. in
Section Error! Reference source not found..)
The pinouts that support remote alarm status monitoring are detailed below.
Table 3: DB9 Pinouts for Remote Monitoring of Alarm Status
Status = NORMAL Status = ALARM
Pin 5 Open to pin 8 Shorted to pin 8
Pin 9 Shorted to pin 8 Open to pin 8
Figure 7: DB9 Pinouts for Remote Alarm Status Monitoring

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The pins are connected to an internal relay of the encoder. The relay contacts are rated at 0.3A
max, 24VDC.
The alarm/status relay connections are set by the following conditions:
•Encoder bypassed (from power loss, front panel switch, or remote control)
•Encoder over-temp
•Encoder license expired
•Time Board Error
•Encoder fatal system error (e.g. boot failure, DSP failure, FPGA failure, etc.)
•Other conditions as set by updated software features
6.5. THEORY OF OPERATION FOR THE STATUS AND CONTROL RELAYS
The SGE remote status and control relays all operate as described below and illustrated in Figure
8. This includes:
•The remote bypass monitoring relay (See Step 8in Section 5)
•The remote bypass control relay (Section 6.3.4)
•The remote alarm/status monitoring relay (Section 6.4)
Within the encoder, the alarm and encoding relays receive signals from the microcontroller and
the contacts close or open, indicating appropriate condition at the pins of the DB9 interface.
The voltage applied at the remote control interface pins (1 and 6) is sent to an optically isolated
translator which is fed to the encoder controller input similar to the front panel switch signal.
The encoder begins to encode only if the remote bypass control pins AND the front panel bypass
switch are in enable modes. Otherwise, the encoder remains in bypass mode.
The encoder controller de-energizes the bypass relays and connects the corresponding input and
output connector through the Normally Closed (NC) path of the relay.

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Figure 8: Status and Control Relay Connection Scheme
6.6. USING THE LCD MENU
The SGE displays status and error messages on the front panel LCD.
Whenever the encoder displays a message and remains in encode mode, pushing the Step and
Enter buttons simultaneously will clear the LCD message.
When the encoder is in enable mode and is operating normally, it displays a default message of
“Encoding:” and a station specific message (station information).
Whenever an error occurs, a message describing the problem appears on the LCD.
When the encoder is in push-button bypass mode, it displays “Bypass Mode Encoder Disabled.”
At this time pressing the front panel STEP button repeatedly will display the following series of
status messages:
1. Host firmware version and build number, displayed as “Host: V:XXXX B:XXXX”
2. DSP firmware version and build number, displayed as “DSP: V:XXXX B:XXXX”
3. FPGA firmware version and build number, displayed as “FPGA: V:XXXX B:XXXX”
4. Amps information, provided for Arbitron internal use only.
5. Time board status message (e.g., “No Time Board Expected”).
6. Two numbers displayed as “XXXXXXXXXX XXXXXX” The first number is provided
for Arbitron internal use only. The second number is the encoder serial number.
7. Internal temperature of the unit in degrees Celsius, displayed as “Temperature XX C”
8. Sample rate information, not applicable for analog encoders.
9. Configuration information, for example: “ON Modes: STEREO OE W P NETTS” For
Arbitron internal use only.

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10. Alarm level information, for Arbitron internal use only.
11. Alarm minutes information, for Arbitron internal use only.
At any stage in the sequence of messages above, pressing the Enter button will cause the LCD to
redisplay the default bypass message, “Bypass Mode Encoder Disabled.”
6.7. ENCODER OVERHEAT BEHAVIOR
Arbitron encoders are designed to withstand heat at tolerances similar to those of other studio-
grade broadcasting equipment. When properly installed in a climate-controlled environment as
described in Section 5, the encoder should experience no overheat issues. Should your encoder
LCD display an “Over Temp” alarm message, check that the encoder has been properly installed.
The table below provides an overview of encoder response to conditions of excessive heat.
Table 4: Encoder Overheat Behavior
Operational
Ambient
Temperature
Range
Temperature
Stage Internal Temperature Display Message LED Status
Alarm
Relay
Status
Encoding
Status
How is the
error
cleared?
0°C-45°C Normal 60°C or
Below
“Encoding” Solid
Green
N/A Encoding N/A
Over
Temperature
Overtemp
alarm is
triggered:
•If internal
temperature
is 61°C at
initial boot.
•Once the
encoder
reaches
65°C steady
state.
"Over
Temp
Encoder
Disabled"
Solid
Red
For
RoHS
Units,
Asserted.
For non-
RoHS
Units,
N/A.
Not
Encoding
(Bypass)
Automatic.
Error will
clear as
soon as the
internal
temperature
drops
below 61°C
7. ELECTRICAL SPECIFICATIONS
7.1. ANALOG SPECIFICATIONS
7.1.1. Frequency Response
20Hz-20kHz, +- 0.2dB

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7.1.2. Signal to Noise Ratio
Typically -80 dBu over a 20Hz-20kHz bandwidth
7.1.3. Gain
+0.4dB over 20Hz-20kHz
7.1.4. Input Impedance User Selectable
600Ω, balanced terminated (“600”) or
10kΩ, balanced bridging (“HI”)
7.1.5. Total Harmonic Distortion + Noise
Better than 0.01% over 20Hz-20kHz
7.1.6. Output Impedance
50Ωbalanced
7.1.7. Differential Phase
Less than +-1 degrees over 20Hz-20kHz
7.1.8. Cross-Talk
Better than –90 dB over 20Hz-20kHz
7.1.9. Maximum Analog Input Level
20dBu (21.9V p-p) over 20Hz-20kHz
7.1.10. Headroom
20dB, referenced to 0dBu
7.1.11. Common Mode Rejection Ratio
Better than –70dB referenced to a 20dBu
Common mode input at 60Hz
7.1.12. Maximum XLR Cable Length:
10 meters

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7.2. ALARM (RELAY)SPECIFICATIONS
7.2.1. Absolute Maximum Voltage Input
24VDC or 24VAC
7.2.2. Absolute Maximum Current Input
300 mA
7.3. POWER SPECIFICATIONS
7.3.1. Voltage
100 – 240 VAC
7.3.2. Current
1.4 Amps maximum
7.3.3. Frequency
50/60Hz
7.3.4. Connector Type
IEC
8. GENERAL SPECIFICATIONS
8.1. PHYSICAL SPECIFICATIONS
8.1.1. Dimensions
48 x 19 x 4.5 cm (L x D X H)
8.1.2. Weight
3.5 kg
8.1.3. BTU Output
40.12 BTUs/hour, assuming operatingat 120V, 11.8 W.