Return path monitoring is essential as a means to keep a watch on the return spectrum for transient interference, noise, common path distortion (CPD), laser clipping, and other problems.
The first step in developing a successful alignment and maintenance strategy for the return path depends on understanding what constitutes a properly operating system. If you have not already done so, review your system parameters so that you will have the following information handy:
When the SST is setup according to the 9581 SST R4 Operation Manual, it reserves about 15 dB of its amplitude measurement range to prevent the digitizer from being overloaded by powerful ingress transients. 10 dB of this “guard band” is visible as the top division on the 9581 SST R4’s spectrum display with an additional 5 dB above that.
Please enter as much information as possible. If you are unsure about any IP information, please contact your Internet service provider (ISP) or IT/MIS department for more details or call your contact at Trilithic.
Effective, efficient preventive maintenance for the RF portion of the HFC network requires skill and application specific tols. One of the most useful tools for alignment and troubleshooting is system sweeping.
Before you begin using your 9581SST R4 system, let’s review the theory behind return path alignment and maintenance.
HFC network engineers with IP telephony service experience know that high- quality services are founded on a clear plan for system oversight that includes monitoring, aligning, maintaining, troubleshooting and proper installation.
Trilithic encourages maintaining up-to-date firmware; however, your company may have policies in place to manage the update process.
WARNING! This firmware is appropriate for most users, but some MSO’s do have different update policies in place. As such, in some cases the standard firmware may render certain test functions inoperable. Please contact your manager before updating your firmware.
All repairs carry a 90-day warranty against defects in replacement parts and repair workmanship.
All Trilithic products are warranted against defects in materials or workmanship for a minimum of one year after shipment.
Trilithic's obligation under this warranty is limited to the repair or replacement of the product after being returned to our factory, and Trilithic determining the product be indeed defective.
This is Trilithic's sole warranty and is given in lieu of all other warranties, expressed or implied, including warranties of merchantability or fitness for a particular purpose and sets forth the buyers sole remedy.
| 8821Q, 8821Q-R & 8853Q | Rotary & Benchtop Attenuators | TFS-3200 Series |
| APSS-1B | TFS-201 | TFS-FS1 |
| DCVF-5 | TFS-290 Series | TFS-FS1K500 Series |
| Impedance Matching Pads | TFS-301 | TLB-60 |
| I-Stop | TFS-401 | Tunable Filters |
| Programmable RF Switches | TFS-2000 Series | VF-4 & VF-5 |
| 860 DSP & 860 DSPi | 9581 SST R3 & 9581 SST R4 | RSVP² |
| 860 DSPh & Input Expander | 9581 TPX | Seeker Lite² |
| 860 DSPr | CT-2/ CT-3 | Seeker |
| 8300 FST | Model Two | Seeker MCA |
| 8310 RSA | Model Three | Seeker BB-2 |
All Specially Configured Dell PowerEdge 2U Rack Mount Server products are warranted against defects in materials or workmanship for a minimum of three years after shipment. Dell provides next business day, parts and labor, on-site response for the following Trilithic products.
| ADIA Integrated Server Package | LAW Server Package |
| Guardian II Integrated Server Package | Trilithic Data Manager (TDM) Integrated Server Package |
