Bogen NYQUIST NQ-GA20P2 User manual

Integrated Power Amplifier
Configuration Guide
NQ-GA20P2
© 2021 Bogen Communications, Inc.
All rights reserved.
740-00074A
211116

i
Contents
Configuring the Nyquist Integrated Power Amplifier . . . . . . . . . . . . . . . . . . . . . . . . 1
Using the Dashboard . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2
Standalone Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4
Updating Firmware . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4
Network Settings Tab Parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6
Configuration Settings Tab Parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9
Standalone Operation Configuration Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11
Accessing Log Files . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14
Setting DSP Parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .16
Setting the Channel Level. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .19
Adjusting Volume Levels . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .19
Knob Adjustments . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .19
Signal Indicators. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .19
Muting a Channel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .20
Adjusting Compression Settings. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .20
Setting High Pass/Low Pass Parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .22
Adjusting the Limiter. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .25
Adjusting Outputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .27
Adjusting Parametric Equalizer Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .28
Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .30
Signal Present. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .31

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List of Figures
Figure 1. Nyquist Appliance Login. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2
Figure 2. NQ-GA20P2 Dashboard . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2
Figure 3. Firmware Update Page . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5
Figure 4. Network Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7
Figure 5. Appliance Configuration Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9
Figure 6. Appliance Configuration Settings (Standalone enabled) . . . . . . . . . . . . . . . . .11
Figure 7. Logs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15
Figure 8. DSP Page with Channel Drop-Down Menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . .17
Figure 9. Compressor Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .20
Figure 10. High/Low Pass Parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .23
Figure 11. Limiter Settings. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .26
Figure 12. Outputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .27
Figure 13. Parametric Equalizer Settings. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .28
Figure 14. Settings Parameters. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .30
Figure 15. Signal Present Parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .31

iii
List of Tables
Table 1. Appliance Dashboard Fields. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3
Table 2. Appliance Dashboard Buttons . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3
Table 3. Firmware Update settings. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6
Table 4. Network Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7
Table 5. Configuration Settings (Standalone disabled) . . . . . . . . . . . . . . . . . . . . . . . . . .10
Table 6. Configuration Settings (Standalone enabled). . . . . . . . . . . . . . . . . . . . . . . . . . .11
Table 7. Logs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15
Table 8. DSP Page . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .17
Table 9. DSP Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .18
Table 10. Compressor Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .21
Table 11. High/Low Pass Parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .24
Table 12. Limiter Settings. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .27
Table 13. Signal Present Parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .32

1
Configuring the Nyquist Integrated
Power Amplifier
The NQ-GA20P2 is a plenum-rated Nyquist 20-watt integrated power amplifier that
works as a page zone extender to facilitate voice access to a single zone of one-way
paging over the Nyquist network.
It also works in background music applications, leveraging the exhaustive audio manage-
ment and distribution capabilities of Bogen’s Nyquist platform.
The NQ-GA20P2 appliance uses the latest in Class D amplifier technology and provides
unparalleled sonic quality, exceptional reliability, and reduced power consumption to
permit standalone PoE+ operation over the local network.
The Nyquist server or system controller can automatically discover and configure the NQ-
GA20P2, but you can also manage the device, and manually configure some settings,
through the appliance’s web-based user interface (web UI).
A short press of the appliance’s Reset button reboots the device. If you press the Reset
button for 10 seconds, the appliance returns to the factory default configuration settings.
Returning to the default configuration settings does not change the appliance’s firmware.
The following sections describe settings and configurations that can be applied to this device
which are not controlled by the Nyquist server. For information about using Nyquist’s auto-
matic configuration process, refer to the appropriate Nyquist System Administrator Guide.
To access the appliance’s UI:
1Access the appliance’s web UI by doing one of the following:
a) On your web browser, enter the IP address for the appliance as the URL.
b) From the Nyquist web UI navigation bar, select Stations, select Stations Status,
navigate to the device that you want to configure, and then select the Link icon.
Note: Do not use third-party Chrome browser extensions with the Nyquist user interface.

2
2At the Nyquist Appliance Login page, enter username and password, and then select
Login.
The dashboard for the selected appliance appears.
Using the Dashboard
The dashboard displays the following fields:
Figure 1. Nyquist Appliance Login
Figure 2. NQ-GA20P2 Dashboard

3
The following buttons are available at the top of all pages in the application.
Table 1. Appliance Dashboard Fields
Device Type Identifies the model of this device.
Serial Number Identifies the serial number for the device.
MAC Address Specifies the Media Access Control (MAC) address,
which is a unique identifier assigned to network inter-
faces for communications on the physical network seg-
ment.
Firmware Version Provides the firmware version installed on the device.
Standalone Operation Enables or disables Standalone mode.
Table 2. Appliance Dashboard Buttons
Dashboard Displays the dashboard.
Configuration Settings Accesses the Configuration Settings page where you can
view and set various options. If Standalone Operation is
not enabled, you can also receive configuration settings
from a Nyquist server.
Network Settings Accesses the Network Settings page where you can view
and set network settings, such as the static IP address.
Firmware Update Accesses the Firmware Update page where you can view
the current Nyquist version, update firmware to a new
version, restore the configuration to factory defaults,
and reboot the appliance.
Logs Accesses log files, which record either events or mes-
sages that occur when software runs and are used when
troubleshooting the appliance.
DSP Accesses the DSP page where you can view and set
parameters for Digital Signal Processing (DSP).
Help Accesses the appliance’s online help.
Manual Displays this appliance’s configuration guide.
Logout Logs out of the appliance’s dashboard.

4
Standalone Operation
This device can run in Standalone Operation mode, where it will not interact with a
Nyquist server (e.g., E7000 or C4000). This means the device will not:
• Fetch device configuration from Nyquist server
• Register with Nyquist server (via SIP)
• Store backup information to Nyquist server
• Allow access to Nyquist server-based NTP
Standalone Operation mode is ideal for scenarios that do not require the full functionality
provided by an integrated system, such as the Bogen C4000 or E7000 Series, but has the
ability to provide paging, multi-channel audio processing, and a SIP endpoint for a PBX/
VoIP phone system. It can be used to play music, audio, paging, and related functions.
Updating Firmware
When you select Firmware Update from the appliance’s web UI, the Firmware Update
page appears. From this page you can determine which Nyquist firmware version the
appliance is using and if an update is available. You can also load a firmware release,
install the loaded firmware, restore the configuration to factory defaults, and reboot the
appliance.
Note: A Nyquist appliance connected to the Nyquist network receives a configuration
file from the Nyquist server that includes the latest firmware available from the server.
If the firmware is different from the one installed on the appliance, an automatic firm-
ware update occurs unless the Firmware parameter for the station is left blank. Refer to
the Nyquist System Administrator Guide for more information.

5
To use the Firmware Update page:
1On the appliance web UI’s main page, select Firmware Update to view or update the
firmware version.
2If the device is in Standalone mode, selecting the Check for Updates button checks
the Bogen website for the latest firmware version available. If a version newer than
the one currently installed is found, it is downloaded to the appliance.
3If you already have a firmware file you would like to install to the appliance, select
Upload Firmware to upload the firmware file from your computer to the appliance. A
popup screen appears that allows you to select the file that you want to upload. You
can navigate to the file’s location. After you select the file, select Upload.
4The page displays the uploaded firmware version (“New Nyquist Version”) and an
Update Firmware button appears. Select this button if you want to update the appli-
ance’s firmware to the uploaded version.
5If you want to return your appliance to its original factory configuration, select
Restore Factory Settings.
6Select Reboot Appliance to restart your appliance.
Figure 3. Firmware Update Page

6
Network Settings Tab Parameters
Network settings can be configured dynamically by the Nyquist server or manually by
using the appliance’s web UI.
To manually configure network settings:
1On the appliance web UI’s main page, select Network Settings.
Table 3. Firmware Update settings
Current Nyquist Version Shows the version of the appliance’s currently
installed firmware.
New Nyquist Version Shows the version of the firmware that has been
loaded, though not installed, onto the appliance.
Update Firmware Available only when a new firmware version has
been loaded onto the appliance (as specified in
New Nyquist Version).
Installs the loaded firmware. A reboot may be
required after installation.
Upload Firmware Prompts the user to specify a firmware file, which
will then be loaded (though not installed) onto the
appliance.
Note: To obtain the firmware file for a specific ver-
sion, please contact Bogen Customer Service.
Check for Updates Available only when the appliance is configured
for Standalone mode.
Checks the Bogen website for the latest firmware
version available and, if it finds a version newer
than what is currently installed, downloads it to
the appliance.
Restore Factory Settings Returns the appliance to its original factory con-
figuration.
Note: This does not install the original appliance
firmware. The firmware will not be changed.
Reboot Appliance Restarts the appliance.

7
2Select your desired network settings.
3Select Save.
Network settings are described in the following table:
Figure 4. Network Settings
Table 4. Network Settings
IP Address Identifies the IP address assigned to the appliance.
Netmask Identifies the subnetwork subdivision of an IP net-
work.
Gateway Identifies the address, or route, for the default gate-
way.
VLAN ID Identifies the Virtual Local Area Network (VLAN) for
this appliance. Values range from 0 to 4094.
VLAN Priority Identifies the priority of the network traffic on the
VLAN. Priority can range from 0 through 7.

8
NTP Server Identifies the IP address or the domain name of the
Network Time Protocol (NTP) Server.
Note: This field is only editable when Standalone
Operation is enabled.
TFTP Server Identifies the host name or IP address of the Trivial
File Transfer Protocol (TFTP) server.
The specified TFTP server can be used to automati-
cally set this device’s Configuration settings via the
Get Configuration from Server button.
If TFTP Server from DHCP (see below) is set to “Yes”,
this value will be auto-configured via DHCP option
66, assuming the DHCP server has been configured
to provide option 66. For details, see the documenta-
tion for your DHCP server.
Note: A TFTP server runs on the Nyquist server on
port 69 (the standard TFTP port) and the optional
Nyquist DHCP service automatically provides this
TFTP address via option 66.
Note: If this value is unspecified, the TFTP Server
from DHCP will automatically be set to “Yes”, this
field will become read-only, and DHCP will be used to
configure this setting. To change this value, the TFTP
Server from DHCP setting must be set to No, which
makes the field editable.
Note: This setting is not available when Standalone
Operation is enabled.
TFTP Server from DHCP “Yes” means the device will use the DHCP option 66
value to retrieve an address for the TFTP Server from
DHCP.
“No” means the device will ignore the DHCP option
66 value and use the manually configured value of
the TFTP Server (see above).
Note: This setting is not available when Standalone
Operation is enabled.
Table 4. Network Settings (Continued)

9
Configuration Settings Tab Parameters
The way to configure this Nyquist appliance is to obtain configuration settings from the
Nyquist server by selecting Get Configuration From Server.
To view or modify the Nyquist appliance configuration:
1On the appliance Web UI’s main page, select Configuration Settings.
2View the settings as described in Table 5 on page 10 for normal configuration, or
modify the settings as described in "Standalone Operation Configuration Settings” on
page 11 for Standalone Operation configuration.
3If changes were made (Standalone Operation only), click the Save Configuration
Settings and/or Save Multicast Addresses buttons to save your changes.
DHCP Enabled Indicates if the device is enabled to use DHCP to
retrieve its IP configuration.
Reboot Appliance Indicates that this appliance should reboot when the
Save button is clicked.
Figure 5. Appliance Configuration Settings
Table 4. Network Settings (Continued)

10
The following table describes the Configuration Settings tab settings when Standalone
Operation is not enabled for this device:
The Configuration Settings tab also displays the following information for each Device
Station attached to the amplifier:
Table 5. Configuration Settings (Standalone disabled)
Web Username Provide a web username for this appliance.
Emergency-All-Call Identifies the IP address, port number, cut level (vol-
ume), and station list used for emergency all-call
pages.
All-Call Identifies the IP address, port number, cut level (vol-
ume), and station list used for all-call pages.
Audio Distribution Identifies the IP address, port number, cut level (vol-
ume), and station list used for audio distribution.
Multicast # Identifies the IP address, port number, cut level (vol-
ume), and station list used for the multicast audio
stream of one (or more) zones.
Port Number Shows the port number of the appliance.
Port Type Shows the device type to which the port connects.
Account ID Shows the SIP account (IP address) associated with the
device preceded by the extension of the device associ-
ated with this port.
Local Port Shows the port used for SIP.
Username Shows the username or extension for the station associ-
ated with the port.

11
Standalone Operation Configuration Settings
The following table describes the Configuration Settings tab settings when Standalone
Operation is enabled for this device:
Figure 6. Appliance Configuration Settings (Standalone enabled)
Table 6. Configuration Settings (Standalone enabled)
Device Type Displays the type of this device.
Device Name Provides a name for this device.
Web Username Specifies a web username for this appliance.

12
The following parameters appear for each Multicast Address configured for this device.
Web Password Specifies a web password for logging into the appliance.
Web Confirm Password Re-enter the password used to log into the appliance.
Time Zone Specifies the time zone in which the device resides.
Enable SIP Calls Enables this device to receive one-way SIP calls, wherein
only the caller can be heard (such as announcements). If
enabled, a number of SIP-related configuration settings
are displayed.
SIP Server AddressaSpecifies the IP address of the SIP Registration Server with
which the device will register.
SIP Network PortaSpecifies the IP port on which to communicate with the
SIP Registration Server (typically 5060).
SIP CodecsaDisplays a read-only list of codecs allowed on SIP sessions.
SIP ExtensionaSpecifies the SIP extension for this device.
The extension, along with the IP address, is used to specify
the URI used to place a SIP call to this extension:
sip:<extension>@<local_ip_address>
SIP UsernameaSpecifies the SIP user name used to register Channel A, B,
C, or D with the SIP server.
SIP PasswordaSpecifies the SIP registration password used to register
Channel A, B, C, or D with the SIP server.
Output Power (Watts)aSpecifies the output power for the amplifier in Watts.
Valid values are: 1/8, 1/4, 1/2, 1, 2, and 4.
Cut LevelaCut level for intercom calls.
This can be a value from -42 to 0 dB.
a. Available only when Enable SIP Calls has a value of Yes.
Multicast IP Address Specifies the multicast IP address on which to receive
audio streams.
Multicast Port Number Specifies the multicast port on which to receive audio
streams.
Table 6. Configuration Settings (Standalone enabled)

13
Codec Specifies the codec to be used when decoding audio.
Select one of the following values:
• G711 u-law
• Intercom call quality
•A narrowband audio codec that provides toll-qual-
ity audio at 64 kbps. The u-law version is primarily
used in North America and Japan.
• G711 a-law
•Intercom call quality
•A narrowband audio codec that provides toll-qual-
ity audio at 64 kbps. The a-law version is primarily
used in most countries outside of North America
and Japan.
• G722
•Tone and paging quality
•A wideband audio codec operating at 48, 56, and
64 kbps.
• OPUS
•Music quality
•An audio codec format designed for speech and
general audio, supporting low latency, constant and
variable bitrate encoding (6 to 510 kbps), and five
sampling rates (from 8 to 48 kHz).
Channels Channel(s) on which the audio streams will be output.
One or more of the following values:
• Speaker
Tip: Fine tuning of levels per output channel can be adjusted using
DSP settings.
Cut Level (dB) Specifies the cut level for the audio stream.
This can be a value from -70 to 0 dB.
The default value is -20 dB.
Note: To modify, click on the value, adjust the slider on the
popup using the cursor keys or mouse, and click the check
box button.
Tip: To fine tune the cut level per channel, adjust the gain settings on
the DSP Router.

14
Accessing Log Files
A log file records events and messages that occur when software runs, to be used when
troubleshooting the appliance. From the appliance’s web-based UI, log files can be
viewed directly or exported via download to your PC, Mac, or Android device, where they
can be copied to removable media or attached to an email for technical support.
To view a log file:
1On the appliance Web UI’s main page, select Logs.
2From the drop-down menu, select the log that you want to view.
Multiple versions of the same log, and zipped copies of the log, may be available.
3To export the file, select Export.
A link to a .txt file appears in the browser’s lower left corner.
Note: A maximum of 24 multicast entries is supported.
Multicast Addresses should be ordered by priority, highest priority first. If multiple
streams are active on the same channel simultaneously, the one with the highest prior-
ity will be played. Set the Sorting switch to Enabled and drag entries using the 4-way
arrow symbols to drag entries up and down to rearrange the priorities.

15
Available logs are described in the following table. If a log file is empty, however, it will
not appear in the drop-down list of available logs.
Figure 7. Logs
Table 7. Logs
Log Description
ampws.log Contains information about protection status and logs
protection events with temperature information at the
time of event.
auth.log Contains system authorization information, including
user logins and authentication methods that were
used.
btmp Contains information about failed login attempts.
daemon.log Contains information logged by the various back-
ground daemons that run on the system.
debug Contains errors and debug information.
dpkg.log Contains information that is logged when a package is
installed or removed using dpkg command.
faillog Contains user failed login attempts.

16
Setting DSP Parameters
When you select DSP from the appliances web UI, the DSP page appears.
kern.log Contains information logged by the kernel and recent
login information for all users.
lastlog Contains information on the last login of each user.
messages Contains messages generated by Nyquist.
php5-fpm.log Contains errors generated by the PHP script.
syslog Contains list of errors that occur when the server is run-
ning and server start and stop records
user.log Contains information about all user level logs.
wtmp Contains historical record of users logins at which ter-
minals, logouts, system events, and current status of
the system, and system boot time.
Table 7. Logs (Continued)
Log Description