Advertisement
Quick Links
Advertisement
Related Manuals for Keysight DOCSIS 3.1
Summary of Contents for Keysight DOCSIS 3.1
- Page 1 Keysight DOCSIS 3.1 Configuration Wizard Version 1.4 Installation & User’s Guide...
- Page 2 The information contained in this document is subject to change without notice. Keysight Technologies makes no warranty of any kind with regard to this material, including but not limited to, the implied warranties of merchantability and fitness for a particular purpose.
- Page 3 89600 VSA now supports DOCSIS 3.1 DS (Down Stream) & US (Up Stream) modulation analysis with 89601B/BN-BHF Custom OFDM option. Because of complexity of OFDM signals defined in DOCSIS 3.1 standard, this wizard tool helps to configure the OFDM signals for your test with 89600 VSA software.
- Page 4 Select the Installation Folder. If you want to change the installation folder, enter it below or click “Browse” button. You can also specify the user of the DOCSIS 3.1 wizard as just yourself, or everyone who accesses the PC or PC-based instruments.
- Page 5 b. Click “Next” to start the installation. After completion, a window should pop-up and display “Installation Complete”. Figure 3 Confirm Installation Installation & User’s Guide 89600-90258...
- Page 6 You can also create a short-cut on your desktop with this wizard for easy access to Docsis31ConfigWizard.exe. II. Follow the steps below to navigate the DOCSIS wizard. Figure 4 DOCSIS 3.1 Configuration Wizard (DS, Downstream) How to create the DOCSIS Downstream setup files for 89600 VSA Custom OFDM (Option BHF): Step 1 Basic parameters 1.
- Page 7 Nfft = NumberOfLeftGuard + NumberOfActive + NumberOfRightGuard 4. Select data modulation. This is the modulation applied to all of the data subcarriers in the DOCSIS 3.1 downstream signal. — BPSK, QPSK, 8PSK — 16QAM [default], 32QAM, 64QAM, 128QAM, 256QAM, 512QAM, 1024QAM, 2048QAM, 4096QAM, 8192QAM, 16384QAM (8192QAM &...
- Page 8 9. Now you can move to the center column to set exclusion bands. Step 2 Exclusion bands (EB) setup Exclusion bands are bands of sequential subcarriers that are not to be used by the DOCSIS 3.1 signal. This may be due to interference reasons, or because some parts of cable spectrum are in use by some legacy service, such as a 6 MHz QAM or analog channel.
- Page 9 — Whenever you make changes to the exclusion band information, you may want to check or regenerate the continuous pilot positions to make sure that no continuous pilots are located in an exclusion band (refer DOCSIS 3.1 specifications section 7.2.5 Channel Band Rules, this was changed from previously named as 7.2.5 Exclusion Band Rules.) Step 3 Continuous pilots This is defined in section 7.5.15.2 of the DOCSIS 3.1 Physical Layer Specification.
- Page 10 Once you have setup these measurement conditions, again use the file menu on 89600 VSA as File > Save Setup to replace the generated setup file by the DOCSIS 3.1 wizard. Now you can save all other settings with center frequency, bandwidth, and amplitude to actual input signals for you to easily set up tests next time by recalling the setup file.
- Page 11 Light golden yellow, Light pink, Orange, Turquoise, and Slate blue. Figure 7 DOCSIS 3.1 OFDM Layout Viewer The top left of the viewer screen shows the lowest frequency active subcarrier of the first symbol of the 128 symbol DOCSIS frame. The bottom right of the viewer shows the highest frequency subcarrier of the last symbol of DOCSIS frame.
- Page 12 How to create DOCSIS 3.1 Upstream (US) signals First, start the Upstream Wizard from the menu at the bottom of the Downstream menu. Figure 8 DOCSIS 3.1 Configuration Wizard (Launch Upstream Wizard) Configure Upstream signal in the configuration tool. Figure 9 DOCSIS 3.1 Configuration Wizard (US, Upstream)
- Page 13 How to create the DOCSIS 3.1 US setup files for 89600 VSA Custom OFDM (Option BHF): Step 1 Basic parameters 1. Select FFT mode (2048 or 4096). 2. Set the bandwidth by setting the lower and upper guard subcarriers. — The method for setting the bandwidth has been updated in the new version of the wizard.
- Page 14 0 to 239 depending on the bandwidth selected. — DOCSIS 3.1 Upstream signals can be partitioned in time and in frequency. The burst width in time is specified by the K value above. The burst width in frequency is specified by the concept of minislots.
- Page 15 Once you have setup these measurement conditions, use the file menu on 89600 VSA File > to replace the generated setup file used by the DOCSIS 3.1 wizard. Now you can Save Setup save all other settings with center frequency, bandwidth, and amplitude to actual input signals so you can easily set up tests in the future by recalling the setup file.
- Page 16 Figure 10 DOCSIS 3.1 Upstream Figure 11 DOCSIS OFDM Layer View (Upstream) Installation & User’s Guide 89600-90258...
- Page 17 (Colors can be changed by modulation types in your configuration.) Wizard v1.3 or later adds the menu tool bar to allow the DOCSIS 3.1 wizard setup file (*.ini) for easy open, save, or save as. You can load (open) or save setting files you created with the DOCSIS wizard.
- Page 18 This information is subject to change without notice. © Keysight Technologies 2015 Edition 3, October 2015 89600-90258 www.keysight.com...