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To adjust the high/low pass parameters for a channel:

1

On the appliance Web UI’s main page, select 

DSP

.

2

Select the 

Menu

 button for the channel.

3

From the drop-down menu, select 

High/Low Pass

.

4

Set the parameters described in the following table:

Note: 

If you want to return to the factory settings, select the 

Reset

 icon that appears in 

the right corner.

Table 10. High/Low Pass Parameters

 

High-Pass (Low Cut)

This feature helps eliminate low-frequency noise (signals of 100 Hz and below, such as 

background rumble from ventilation systems, etc.) and is used primarily with micro

-

phone-level input. It is particularly effective when handheld microphones are used.

Frequency

Set the cutoff frequency. You can adjust the frequency by 

moving the knob (click and move up or down) or by dou

-

ble-clicking the knob and typing the frequency. When typ

-

ing the frequency, only numeric values from 20 Hz to 

20,000 Hz can be entered.
The high-pass filter attenuates content below this fre

-

quency and lets frequencies above this cutoff frequency 

pass through the filter.

Type

Available filter types are:
• Linkwitz-Riley (12, 24, 36, and 48 dB per octave)
• Butterworth (6, 12, 18, 24, 30, 36, 42, and 48 dB per 

octave)

• Bessel (12, 18, and 24 dB per octave)

Note: 

The term “dB per octave” describes how steeply fre

-

quencies below the selected cutoff frequency are attenu

-

ated. For example, if the cutoff frequency is 100 Hz and the 

filter type specifies 12 dB per octave, a 50-Hz signal (i.e., 

one octave lower) will be attenuated by 12 dB and a 25-Hz 

signal (i.e., two octaves lower) will be attenuated by an 

additional 12 dB.

Summary of Contents for NQ-GA400P

Page 1: ...AoIP Gateway Configuration Guide NQ GA400P 2021 Bogen Communications Inc All rights reserved 740 00163A 211115 ...

Page 2: ...tings Tab Parameters 9 Standalone Operation Configuration Settings 11 Accessing Log Files 15 Setting DSP Parameters 17 Setting the Channel Level 20 Adjusting Volume Levels 20 Knob Adjustments 21 Signal Indicators 21 Muting a Channel 21 Adjusting Input Gain 22 Troubleshooting Gain Structure 22 High Low Pass 23 Limiter 25 Parametric EQ 27 Settings 28 Signal Present 29 ...

Page 3: ...twork 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 ...

Page 4: ...ssword and then select Login The default username is admin the default password is bogen The dashboard for the selected appliance appears Using the Dashboard The dashboard displays the following fields Figure 1 Nyquist Appliance Login Figure 2 NQ GA400P Dashboard ...

Page 5: ... 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 ver...

Page 6: ... 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...

Page 7: ...ppliance 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 4 The page displays the uploaded firmware version New Nyquist Version and an Update Firmware button appears Select this button if you want to ...

Page 8: ...ified 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 Standal...

Page 9: ...s 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 ...

Page 10: ... 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 whi...

Page 11: ... s main page select Configuration Settings 2 View 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 3 If changes were made Standalone Operation only click the Save Configuration Settings Save Multicast Addresses Audio Cast and or Save Multicast...

Page 12: ...ngs see Network Settings Tab Parameters on page 6 Web Username Identifies the username of the current user 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 ...

Page 13: ...d convert the mic level signal to a line level signal For the Multicast Addresses Audio Cast entry whose channel matches the line input port specify a codec cut level and multicast address and port to which the signal will be streamed That stream can be consumed by one or more devices to receive announcements or SIP calls To receive announcements or SIP calls configure one or more Multicast Addres...

Page 14: ...peration 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 ...

Page 15: ...ich to communicate with the SIP Registration Server typically 5060 SIP Codecsa Displays a read only list of codecs allowed on SIP ses sions SIP Extensiona Line Output 1 2 Specifies the SIP extension for Line Output 1 or 2 The extension along with the IP address is used to specify the URI used to place a SIP call to this exten sion sip extension local_ip_address SIP Usernamea Line Output 1 2 Specif...

Page 16: ...audio streams Codec Specifies the codec to be used when encoding or decod ing 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 ve...

Page 17: ...evels 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 If multiple output channels are selected they will all use the same cut level Fine tunin...

Page 18: ... 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 fail...

Page 19: ... package is installed or removed using dpkg command faillog Contains user failed login attempts 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 whe...

Page 20: ...e output strips accept the digital net work receive from the network and after DSP enhancements digital to analog conver sion and gain adjustments send the analog output to the line output connectors Figure 8 DSP Page Note The terms analog input and analog output will be used to refer to the electrical signals on the physical analog ports e g from a microphone and to an amplifier while network sen...

Page 21: ...icular channel The various mixer controls as well as the DSP features available via the DSP Features menu are briefly described in the following table and will be discussed in more detail in subsequent sections Note The DSP page including the mixing board and other DSP pages can only be used by one browser session at a time If another session is already connected and using this DSP page the mixing...

Page 22: ...UT VU meter Indicates the strength of the network send signal Input Gain Adjusts the strength of the analog input signal Table 9 DSP Features High Low Pass Output only Filters out frequencies in the input signal that are above and below specified high and low cutoff frequencies Limiter Input only Prevents a signal from exceeding a certain preset maxi mum level Parametric EQ Output only Uses a cent...

Page 23: ... input channel has signal indicators and two vertical volume unit VU meters labeled IN and OUT The green input signal LED s automatically illuminates when a signal is being received The IN VU meter indicates the strength of the channel s input signal after gain adjust ments while the OUT VU meter indicates the strength of the channel s output signal The VU meter not only illuminates green yellow o...

Page 24: ...9 o clock to 2 o clock If Channel Clipping Occurs If the signal is clipping or producing audible distortion the gain is too high Reduce the Input Gain by turning the knob counterclockwise until the clipping and distortion have been eliminated Also make sure that the Input Gain setting offers a usable control range between the 0 and 20 dB positions on the channel slider volume control If Channel Vo...

Page 25: ...ncy and attenuate signals that are lower Low pass filters allow signals that are lower than the specified fre quency and attenuate signals that are higher When combined they are known as a band pass filter Band pass filters can be used to tailor the frequency response of a microphone exclusively for vocals which can be very useful in a noisy environment to filter out the higher and lower frequenci...

Page 26: ...requency You can adjust the frequency by moving the knob click and move up or down or by dou ble clicking the knob and typing the frequency When typ ing the frequency only numeric values from 20 Hz to 20 000 Hz can be entered The high pass filter attenuates content below this fre quency and lets frequencies above this cutoff frequency pass through the filter Type Available filter types are Linkwit...

Page 27: ...king the knob and typing the frequency When typ ing the frequency only numeric values from 20 Hz to 20 000 Hz can be entered The low pass filter attenuates content above this fre quency and lets frequencies below this cutoff frequency pass through the filter Type Available filter types are Linkwitz Riley 12 24 36 and 48 dB per octave Butterworth 6 12 18 24 30 36 42 and 48 dB per octave Bessel 12 1...

Page 28: ... 6 Select the Menu button for the channel or select the Menu button for the Output 7 From the drop down menu select Limiter 8 Adjust the following settings as needed Figure 10 Limiter Settings Note If you want to return to the factory settings select the Reset icon that appears in the right corner ...

Page 29: ...hich the limiter is triggered Any signal exceeding this threshold will be compressed to this level The range is 24 to 24 dB Decay Sets the rate for turn off of the limiter after the signal is below the threshold Decay range is 5 to 2300 milliseconds RMSTC Root Mean Square Time Constant Sets how fast the limiter reacts to a signal that has exceeded the threshold RMSTC range is 50 to 10000 dB sec Fi...

Page 30: ...g the desired adjustment Q can be from 0 1 to 20 and sets how wide to either side of the selected frequency the adjacent frequencies are affected Q is the Quality or Quality Factor which refers to the bandwidth of one band of a parametric equalizer Q is calculated by dividing the center frequency in Hz by the width of the boost or cut zone 3 dB or 3 dB above or below 0 dB 6 For each frequency use ...

Page 31: ...or the channel 5 For each channel select a color that will be used to highlight the channel 6 Select Save Signal Present You can configure the threshold level that a signal must reach before the signal LED is lit as well as how long the LED will remain lit You can configure this for each channel Figure 12 Settings Parameters Note If you want to return to the factory settings select the Reset icon ...

Page 32: ... page select DSP 2 Select the Menu button for the channel 3 From the drop down menu select Signal Present 4 Adjust the following settings as needed Figure 13 Signal Present Parameters Note If you want to return to the factory settings select the Reset icon that appears in the right corner ...

Page 33: ...shold Sets the minimum level the signal must reach before the signal LED is illuminated Threshold range is 144 to 24 dB Hold Sets the minimum number of milliseconds that the signal LED will remain illuminated Hold range is 2 to 200 milliseconds ...

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