FLDIGI Users Manual: Sound Card Configuration. A few words about sound I/O on the PC. Ii UPS Network Management Card 2 User’s Guide How to Use the Command Line Interface.. Network Interface Rev.1.00 - 3 - 1. Manual Information The purpose of this manual is to provide information on the operation and usage instructions of the Ethernet Interface for the BIXOLON Printers. We at BIXOLON maintain. As briefly mentioned in Section 3.8, “Network settings”, VirtualBox provides up to eight virtual PCI Ethernet cards for each virtual machine. For each such card, you can individually select. UPS Network Management Card 2 User’s Guide 5 Front Panel (AP9630) Front Panel (AP9631) Item Description Serial configuration port Connects the NMC to a local computer to configure initial network settings or access the. ControlNet Network Configuration. 1756 ControlLogix, 1756 GuardLogix, 1769 CompactLogix, 1769 Compact GuardLogix, 1789 SoftLogix, Studio 5000 Logix Emulate. Port. Audio, Pulse. Audio and OSS are different ways in which fldigi can access your sound card through the various sound systems. OSS was the first audio backend in fldigi. It works with the Linux sound system of the same name, which has now been replaced by ALSA but is still supported via an emulation layer. Its only advantage, as an audio backend, is that it's simple and doesn't require any external libraries. The Port. Audio backend was written subsequently to support OSS on Linux and Free. BSD, ALSA and JACK on Linux, Core. Audio on OS X, and also the various sound APIs on Windows – all through the same Port. The System menu provides several information about the Endian UTM Appliance and its status, and allows to define the network setup and some access modalities (e.g., via SSH or for the Endian support). The sub-menu on the left. 1 Windows Peer-to-Peer Network Configuration Guide for CCC Pathways Introduction This document reflects the necessary guidelines for configuring your network to run the Pathways. B&B Electronics, Inc. SPECTRE Configuration Manual 3 SPECTRE. Just like other network interfaces, the wireless ones are controlled with ip from the iproute2 package. You will need to install a basic set of tools for managing the wireless connection. Network Management Card User’s Guide iii Home Page....30 Overview. Audio library. Pulse. Audio is more than an audio hardware access layer; refer to its website for a summary of what it does. Fldigi supports it mainly because many Linux distributions are now integrating it with their desktops, but also because it has a few interesting features. Until then. Audio Devices. On Linux. Use Pulse. Audio if your Linux distro ships it, and you already have the pulseaudio daemon running (this is the case with Fedora 8/9 and Ubuntu 8. SUSE 1. 1. 0). Or if you want networked audio, etc. Port. Audio is also the best way to access JACK, through which you can use other programs as audio sources/sinks – particularly useful with SDR software. As with Pulse. Audio, you can select different capture and playback audio devices. Note that it has not been updated to support user- configurable sample rates. On Windows: Use the Port. Audio and select the device from the list(s). Select the Snd. Crd tab on the configuration dialog. On Linux Fldigi can interface to the sound card using either the OSS, the Portaudio, or the Pulse. Audio. Each of the appropriate libraries must be present on the computer to use that particular sound i/o. On Windows Fldigi uses the Portaudio sound driver only. It is also possible to configure Fldigi with File I/O only, which is useful for testing the application without an interface to the sound card. In the File I/O only configuration you can record and playback audio files in a number of different formats including the . The program will find all active sound cards and the associated drivers for both. Select the sound card and driver type that will be used with the program. I recommend using the Pulseudio device driver if that is available on your Linux distribution. If you know your RX and TX sound card oscillator correction factors you can enter them now. If not you can determine the RX rate correction using a special WWV modem built into Fldigi. The decoder and encoder logic for each of the various modems require a specific sound card sample rate which may not be the the actual sound card sample rate. The conversion between the modem sample rate and the sound card sample rate is accomplished by one of a set of sample rate converters. Sound card oscillators may have a slight error in frequency that causes their sampling rate to not be the value specified. This error is usually small enough to be measured in a parts per million. Fldigi uses a technique called rate conversion to correct the sampled waveform for this error. The error can be measured and the correction factor determined by using the WWV calibration modem. The supporting library used for the converter provides several different levels of conversion, Best, Medium, Fastest and Linear Interpolator. The default, Medium interpolator, will be satisfactory for most sound cards. If you are running fldigi on a computer with limited cpu power you might find it necessary to select one of the more cpu efficient converters, either Fastest or Linear. Each gives progressively poorer performance but use fewer cpu cycles to perform the frequency conversion. You should also be sure that the cpu type is set to Slow cpu on the miscellaneous configuration tab. Select whether you will be using Line- In or Mic- In for the audio connection from the receiver output. Fldigi ALWAYS expects to use the Line- Out for driving the transmitter audio. Set the PCM level for your sound card. Or, you may reverse the right and left channel audio signals. These two controls only change the function of the audio output. Fldigi uses this channel for special controls signals. Fldigi uses this channel for Rx and Tx audio. The PTT, CW QSK and Pseudo- FSK items are found on their respective configuration tabs. They are replicated here for your convenience and these controls may be changed on this or the other tabs. The audio in/out is normally on the left channel and that is the only channel recorded. The recording is make in two channels with the right channel silent. It helps to be able to view both channels using an audio analysis program such as Audacity. This may cause problems not only with fldigi, but other apps that depend on a certain sound card. The work around is not that difficult and will reliably place the preferred sound card in the correct slot. Sound cards are numbered from 0 on to however many cards you have in your computer. The 1st step is to determine the correct id of the cards in your system. Open a terminal and issue the following : : aplay - l Here is an example of what you may see.**** List of PLAYBACK Hardware Devices ****.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. Archives
December 2016
Categories |