Setting DSP Parameters
When you select DSP from the appliance’s web UI, the DSP page appears.
Figure 1. DSP Page |
From this page, you can configure the device’s Digital Signal Processing (DSP) features, a form of processing that uses digital data to simulate characteristics found in analog circuits. With DSP, you can alter analog signals, such as audio or video signals, that have been converted to a digital format.
The DSP page allows you to adjust the microphone input gain slider, as well as viewing level indicators for both the input and output signals. Selecting the DSP Features button (hamburger menu above the OUT signal indicator) displays a menu that allows you to access DSP features, as described in the following table.
Tip: You can select Save Settings to Server to back up all configuration settings to the Nyquist server.
Note: The slide control controls the input gain of the microphone, not the output level of the speaker. To control the output level of the speaker, use the Intercom Cut Level control for this station on the Nyquist System Controller. If this device is in Standalone mode, the output level can be controlled using the Intercom Cut Level control on the Configuration Settings page.
Intercom Tuning | Allows you to specify when the intercom switches between send and receive modes. |
Intercom Tuning
The Entry Door Phone provides half-duplex communications, which means that only one party can transmit at a time. Which party can transmit (i.e., this Entry Door Phone or the Admin Phone) is controlled automatically by the Intercom Tuning settings. Whenever a signal from the Admin Phone exceeds a certain level—known as the switching sensitivity level—the Entry Door Phone switches to receive mode, allowing the party using the Admin Phone to speak. When the signal is below that level, it switches back to send mode, allowing the party using the Entry Door Phone to speak.
Selecting Intercom Tuning from the Menu icon on the DSP page displays the Intercom Tuning page.
Figure 2. Intercom Tuning Settings |
The Intercom Tuning page has LEDs for input and output signals and contains the following settings (see Table 9).
Switching Sensitivity | Specifies the input level above which the Admin Phone transmits, below which the Entry Door Phone transmits. The range is -90 to -20 dB. |