Cablesoft Engineering


Cable Television FCC Proof of Performance testing, with all FCC mandated tests (analog and QAM) performed during testing. All downstream QAM carriers are tested to ANSI/SCTE 40 2016 specifications. A sample FCC POP report is available on the ‘Downloads’ page.

Technical Due Diligence testing for cable system sale and acquisition. 

High Definition ATSC (8-VSB) receive site testing including antennas, downleads, decoders, and full analysis of the 8-VSB signal with a dedicated 8-VSB spectrum analyzer. A computerized signal survey level projection program is utilized (CSE’s in-house survey program) is correlated with receive site measurements. Services also include the locating of optimal alternate receive sites; where the existing site is prohibitive to good off-air reception. See the Download page for an article on 8-VSB theory, reception, plus actual measurements.

RF Spectrum Analysis and Testing from 9 kHz to 3.2 GHz. Services provided (to 3.2 GHz unless noted otherwise) include calibrated field strength measurements; interference analysis and location (including TI interference at TVRO installations); digital carrier measurements including QAM, OFDM, TDMA, LTE & WiMax; and scalar measurements [to 3.2 GHz] including gain/loss, frequency response, and isolation. See the Downloads page for measurements on various CATV and satellite components, including frequency response, isolation and return loss.

We provide refurbishing, repair, and calibration of Sunrise Telecom AT2500RQv series spectrum/ QAM analyzers, primarily in the version 3 and 4 hardware series; however it is possible to repair and calibrate version 1 and 2 hardware. If you have an AT2500RQv series analyzer and wish to explore support options including calibration please email me using the address at the bottom of this page. The Downloads Page also provides the final versions of Reveal WinCom (no software key required) and System Editor. I'm providing these software packages since VeEX no longer supports this analyzer series or its associated software packages.

The original Avantron AT2000 series units are no longer supported.

The above sample waveforms depict the following distortions and /or interfering carriers: Upper-Left shows composite 2nd order distortions in an HFC cable television network (note beats on green trace at +/- .75 and 1.25 MHz), Upper-Right shows a spurious beat under a 256-QAM carrier (on the green trace with the QAM carrier temporarily disabled), Lower-Left depicts signal leakage measurement in the 700 MHz band (markers at the visual and aural carrier frequencies), and Lower-Right shows a sporadic interfering carrier captured with the RTA signal mask feature is paragraph text.