ASTi AI-Bravo Manual

Advanced Simulation Technology inc.
500A Huntmar Park Drive
Herndon, Virginia 20170 USA
Tel. [phone] • Fax. [phone]
asti-usa.com
Advanced Simulation Technology inc.
500A Huntmar Park Drive, Herndon, Virginia 20170 USA
Revision B, Version 0 (January, 2020)
AI-BravoTechnical User Guide
Document: DOC-HW-BRV-UG-B-0

Product Name: AI-Bravo
AI-BravoTechnical User Guide
© Copyright ASTi 2020
Restricted Rights: Use, duplication, or disclosure by the Government is subject to restrictions as
set forth in subparagraph (c)(1)(ii) of the Rights in Technical Data and Computer Software
clause at DFARS 252.227-7013.
This material may be reproduced by or for the U.S. Government pursuant to the copyright
license under the clause at DFARS 252.227-7013 (1994).
ASTi
500A Huntmar Park Drive
Herndon, Virginia 20170 USA

iii
Revision history
Date Revision Version Comments
11/18/2019 A 0 Baseline version.
1/27/2020 B 0 Updated figure labels in "I/O interface pinout." Added
diagram of mounting plate and instructions for
installing the mounting plate.

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Contents
1.0 ASTi Interface-Bravo (AI-Bravo) 1
2.0 Specifications 3
3.0 Audio input and output 5
3.1 Audio interface pinout 6
3.2 I/O interface pinout 7
3.3 Status indicator lights 7
4.0 Control inputs and digital outputs 9
4.1 Control inputs 9
4.1.1 Control input as digital input 9
4.1.2 Control input as analog input 10
4.2 Digital output 10
5.0 Memory devices 11
6.0 Environmental ranges 12
7.0 Typical headset settings 13
8.0 Mounting plate 14
8.1 Install the AI-Bravo's mounting plate 15
Appendix 3: Warranty information 16
3-1 Repairs and returns 16

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1.0 ASTi Interface-Bravo (AI-Bravo)
The AI-Bravo is a compact audio and I/O distribution device that connects local or remote oper-
ator headsets, speakers, control panels, and other peripherals to the network via Ethernet. The
ASTi server routes audio, control, and I/O data to and from each AI-Bravo over a local area net-
work (LAN) or wide area network (WAN). Depending on the user's or program's needs, the AI-
Bravo can connect to a variety of endpoints:
lSimulated radio panels
lLive radios
lPress-to-talk (PTT) devices and headsets
lMicrophones
lPowered speakers
Figure 1, "AI-Bravo hardware diagram" below shows an example of an AI-Bravo network con-
figuration:
Figure 1: AI-Bravo hardware diagram
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The AI-Bravo includes the following features:
lStereo support: supports stereo operation (i.e., independent left and right output) on a
single connector, reducing cabling complexity.
lReduced footprint: takes up little space and fits easily on a desktop.
lSoftware-configurable: includes adjustable preamplifier gains and sidetone for easy, direct
connection to a variety of audio or communications systems and peripherals.
lRoutable: supports IPv4 and IPv6 LAN and WAN topologies.
lIntegrated I/O: includes configurable digital and analog I/O for direct connection of PTT
units, volume controls, switch detection, radio PTT activation, and other control applic-
ations.
lDual USB ports: provides ability to connect USB peripherals based on need (e.g., USB
headset and foot switch).
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AI-BravoTechnical User Guide (Rev. B, Ver. 0)

2.0 Specifications
The AI-Bravo has the following specifications:
Compatible With Voisus
Weight 1 lb., 3 oz.
Power Source Ethernet port via Power over Ethernet (PoE) IEEE 802.3af
Power Consumption <12.5 w @ 56 VDC
Figure 2: AI-Bravo specifications
On the front panel, the AI-Bravo has four DB-15 connectors (i.e., two for audio and two for
I/O):
Figure 3: AI-Bravo front panel
On the rear panel, the AI-Bravo has two USB ports, two additional DB-15 connectors for I/O,
and a Power over Ethernet (PoE) port:
Figure 4: AI-Bravo rear panel
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The AI-Bravo's dimensions are 6.63" L × 4" W × 2.13" H, as shown in Figure 5, "AI-Bravo
dimensions" below:
Figure 5: AI-Bravo dimensions
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3.0 Audio input and output
The AI-Bravo supports two types of audio I/O:
l2 USB ports
l2 DB-15 connectors (i.e., Channel A and Channel B)
Table 1, "Audio input values" below shows the audio input values for Channels A and B:
Characteristic Value
Input impedance 1.65 kΩ
Input level 4.5 Vpp max (2.2 VPP differential)
Input gain 0 dB, +10 dB to +65 dB, software configurable (go to note below)
Table 1: Audio input values
Note: The AI-Bravo gain covers a total range of 65 dB. You can set the range of 10–65 dB in
1 dB steps; however, you cannot choose the range of 1–9 dB as a function of design.
Table 2, "Audio output values" below shows the audio output values for Channels A and B:
Characteristic Value
Impedance 10 Ω
Max. power 150 mW at 32 Ω
Max. output signal 3.75 VPP at 150 Ω
2.4 VPP at 8 Ω
Frequency response 20 Hz to 20 kHz
Table 2: Audio output values
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3.1 Audio interface pinout
Figure 6, "Channels A and B pinout" below shows the audio interface pinout for Channels A
and B:
Figure 6: Channels A and B pinout
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AI-BravoTechnical User Guide (Rev. B, Ver. 0)

3.2 I/O interface pinout
Figure 7, "AI-Bravo I/O interface pinout" below shows the DB-15 connector pinout for the AI-
Bravo:
Figure 7: AI-Bravo I/O interface pinout
Note: Pins 9 and 15 are fused to 150 ma MAX.
3.3 Status indicator lights
The LED status indicator light displays the AI-Bravo's status:
Figure 8: AI-Bravo status indicator lights
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Table 3, "AI-Bravo status indicator lights" below defines each status indicator light for the AI-
Bravo:
LEDLight Status
White solid This LED represents the AI-Bravo's default “Power On” state.
Yellow flash The AI-Bravo is updating. Do not turn off the device.
Red solid Hardware Error #1: failed to find audio device; remove and reapply power, or
contact [e-mail].
Red flash Hardware Error #2: analog-to-digital converter (ADC) chip not found; remove
and reapply power, or contact [e-mail].
Purple flash This LED displays when Find Me is enabled. This feature can identify an AI-
Bravo during setup.
Blue solid No network link exists.
Blue flash 5x/second The AI-Bravo cannot find any Voisus server(s) on the network.
Blue flash 1x/second The AI-Bravo has detected Voisus server(s) on the network, but a server is
not actively using it.
Green flash A Voisus server is actively using the AI-Bravo.
Teal solid Firmware Error #1: remove and reapply power, or contact support@asti-usa.-
com.
Off Firmware Error #2: remove and reapply power, or contact support@asti-usa.-
com.
Table 3: AI-Bravo status indicator lights
8 Copyright © 2020 Advanced Simulation Technology inc.
AI-BravoTechnical User Guide (Rev. B, Ver. 0)

4.0 Control inputs and digital outputs
The AI-Bravo's DB-15 connectors (i.e., Channels A and B) also function as control inputs. The
following sections describe the AI-Bravo's control inputs and digital outputs, explaining how to
use the control input as a digital input, an analog input, or a digital output.
4.1 Control inputs
The control inputs are contact-sensing; no voltage is required. Simply connect the control input
and control input ground lines together using a switch or other suitable device, such as a press-
to-talk (PTT) device. The control input can logically function as either a digital or an analog
input.
Figure 9: Control input circuitry
4.1.1 Control input as digital input
To use the control input as a digital input, simply short or open the required pins. For example, if
you short Pins 9 and 10, Control Input 1 is True. If the pins are open, Control Input 1 is False. In
this example, the control input acts like an on and off switch.
Figure 10: Digital In
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4.1.2 Control input as analog input
To use the control input as an analog input, insert a resistance between the control input and con-
trol input ground pins. The four-channel selector knob, for example, contains a switch that
changes the resistance between the control input and control input ground pins.
Figure 11: Analog In
4.2 Digital output
The digital output circuitry consists of an opto-isolated, solid-state relay for switching power to
external loads. Table 4, "Digital output rating and dissipation" below summarizes the AI-Bravo's
digital output opto-isolated field effect transistor (FET) values:
Type Opto-isolated FET
Maximum continuous current rating 120 mA
Maximum power dissipation 300 mW
Table 4: Digital output rating and dissipation
Figure 12, "Digital output circuitry" below shows the AI-Bravo's digital output circuitry:
Figure 12: Digital output circuitry
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5.0 Memory devices
Table 5, "AI-Bravo memory" below summarizes AI-Bravo devices with volatile and nonvolatile
memory. Volatile memory is erased when you unplug the device, while nonvolatile memory is
retained.
Type Size User Modifiable Function Process to Clear
Volatile
CPU internal cache 512 KB No Internal cache for
CPU
Remove
Power
Count to 30
Restore
Power
Internal cache 128 KB No Internal cache Remove
Power
Count to 30
Restore
Power
RAM 1 GB No RAM Remove
Power
Count to 30
Restore
Power
Nonvolatile
eMMC 4 GB Yes Application Contact ASTi for more
information.
EEPROM 2 x 32 KB No Device identification None
Table 5: AI-Bravo memory
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AI-BravoTechnical User Guide (Rev. B, Ver. 0)

6.0 Environmental ranges
Table 6, "AI-Bravo environmental ranges" below summarizes the AI-Bravo's environmental
ranges:
Range Type Suggested Range
Operating temperature 0°C to +32°C (32°F to 90°F)
Operating max. temperature gradi-
ent
20°C (68°F) per hour
Operating humidity 10–70 percent noncondensing
Storage temperature -10°C to 55°C (14°F to 135°F)
Storage max temperature gradient 30°C (86°F) per hour
Storage humidity 5–95 percent
Max altitude 2,000 meters
Table 6: AI-Bravo environmental ranges
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AI-BravoTechnical User Guide (Rev. B, Ver. 0)

7.0 Typical headset settings
The AI-Bravo supports a mono or stereo headset connection for the DB-15 connector (i.e.,
Channels A and B). Figure 13, "Mono headset connection" below shows a typical mono head-
set connection for the AI-Bravo:
Figure 13: Mono headset connection
Figure 14, "Stereo headset connection" below shows a typical stereo headset connection for the
AI-Bravo:
Figure 14: Stereo headset connection
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AI-BravoTechnical User Guide (Rev. B, Ver. 0)
8.0 Mounting plate
Figure 15, "AI-Bravo mounting plate diagram" below shows AI-Bravo mounting dimensions:
Figure 15: AI-Bravo mounting plate diagram