SCTE BTCS Exam Study Guide (2026)
Everything the SCTE Broadband TelecomCenter Specialist (BTCS) tests, topic by topic: what each section covers, the facts that come up most, and how to study it. Pair it with the free 15-question practice test.
The exam at a glance
| Questions | 50 multiple-choice questions |
|---|---|
| Time | 2 hours; the exam cannot be paused and breaks are not allowed |
| Passing score | 76% |
| Format | Open book: SCTE training materials, books, printed documents, notes, tables, calculators and internet resources are allowed (digital content in a separate tab of the same browser); AI tools are not allowed |
| Certifying body | SCTE (Society of Cable Telecommunications Engineers), a subsidiary of CableLabs |
| Test provider | Online through the SCTE account portal, with Proctorio automated remote proctoring on Chrome or Edge (webcam, microphone and photo ID required) |
Mind map: the whole exam on one screen
Read the complete SCTE BTCS study notes for “Facilities: Power, Grounding and Environment”
Our first full set of comprehensive notes, about 12 minutes of reading: DC power plants · Batteries and runtime · AC power, generators and UPS · Grounding, bonding and environment, a worked exam example, the traps examiners use and a one-minute recap. Create a free account to read it and see how premium notes work before you decide.
1. Facilities: Power, Grounding and Environment
SCTE's Facilities category and the Facilities course in the BTCS curriculum: AC and DC power, batteries, generators, UPS, grounding and bonding, and the environment (HVAC, fire suppression, security) that keeps a headend or hub running. SCTE does not publish topic weights for BTCS.
Key facts
- Telecom DC plants run at -48 V nominal with the positive side grounded; float voltage is around -52 to -54 V.
- Rectifiers convert AC to DC and float-charge the batteries; batteries carry the load when AC fails until the generator starts.
- Battery runtime is roughly Ah / load amps, reduced by high discharge rates, age and low temperature.
- An automatic transfer switch (ATS) moves the load to the generator after a utility failure; exercise generators under load regularly.
- Use a single-point grounding system with a master ground bar so all equipment and the AC service ground are bonded together.
- Heat is the main enemy of electronics and batteries: lead-acid life drops sharply above about 77°F (25°C).
- Size circuit breakers and fuses to protect the cable, and keep A and B power feeds on separate sources for redundant equipment.
Flashcards
Exam tip: For facilities questions, trace the power path in an outage: utility, ATS, generator, rectifiers, batteries, load. The answer is usually the weakest link.
2. Baseband Signaling and IP Networking
SCTE's Baseband Signaling category and the Network Specialist course: digital baseband signals, Ethernet, IP addressing and subnetting, routing, VLANs and multicast in the headend.
Key facts
- IPv4 subnet hosts = 2^(host bits) - 2: /24 = 254, /25 = 126, /26 = 62, /27 = 30, /30 = 2.
- Layer 2 switches forward by MAC address; routers forward by IP address between subnets.
- VLANs separate traffic (management, video, DOCSIS) on shared switches; trunks carry multiple VLANs with 802.1Q tags.
- IP video uses multicast; IGMP lets hosts join groups, and IGMP snooping stops switches flooding multicast.
- SDI carries uncompressed baseband video; ASI carries compressed MPEG transport streams at up to 270 Mbps line rate.
- Fiber Ethernet optics (1G, 10G, 25G) link CCAP cores, video servers and Remote PHY nodes.
Flashcards
Exam tip: Keep a subnet table in your open-book notes. Subnet questions are fast if you never calculate from scratch.
3. Digital Telephony over Cable
SCTE's Digital Telephony over Cable category: PacketCable voice, eMTAs, SIP and call signaling, codecs, DOCSIS QoS for voice, and voice quality measures.
Key facts
- Cable voice runs on DOCSIS using an eMTA (embedded multimedia terminal adapter) at the home, with battery backup for lifeline service where required.
- PacketCable 2.0 uses SIP-based IMS signaling; earlier PacketCable 1.x used NCS (an MGCP profile) between the eMTA and the call management server.
- Media travels in RTP over UDP over IP; signaling and media take different paths.
- G.711 is 64 kbps; with 20 ms packets and 40 bytes of IP/UDP/RTP headers it uses 80 kbps at the IP layer.
- DOCSIS Unsolicited Grant Service gives voice fixed grants at fixed intervals for low latency and jitter.
- Voice quality is judged by latency, jitter, packet loss and MOS (1 to 5; about 4 or higher is toll quality).
Flashcards
Exam tip: Voice questions separate signaling from media. Ask whether the failure is call setup (SIP or NCS) or audio quality (RTP, jitter, loss).
Test yourself on these topics
Take the free 15-question SCTE BTCS test, then save your results to unlock your Readiness Score and the mistakes bank.
4. RF Signals and Headend Combining
The RF part of SCTE's RF/Photonic Signals category and the RF and Baseband course: dBmV levels, modulation (QAM, OFDM), channel plans, combining networks and level setting.
Key facts
- dBmV = 20 log (V / 1 mV) across 75 ohms; 0 dBmV = 1 mV, +20 dBmV = 10 mV, +60 dBmV = 1 V.
- Doubling voltage adds 6 dB; doubling power adds 3 dB.
Flashcards
Exam tip: Ask whether a ratio is voltage or power before calculating: voltage uses 20 log, power uses 10 log.
5. Photonic Signals and Optical Transport
The photonic part of SCTE's RF/Photonic Signals category and the Optical Transport course: headend transmitters and receivers, WDM, fiber handling and optical levels in the facility.
Key facts
- Forward transmitters are typically 1310 nm (short links) or 1550 nm with EDFAs (long links); return links come back at other wavelengths through WDM.
- WDM filters combine or separate wavelengths with low loss; couplers split power, not wavelengths.
Flashcards
Exam tip: Most photonic questions are about level and cleanliness. Check the connector and the optical level before blaming equipment.
6. Video Services and Transport Streams
Video Services course in the BTCS curriculum and the IPTV course: MPEG transport streams, PSI tables, encoding, ad insertion, emergency alerts and IP video delivery.
Key facts
- MPEG-2 transport streams use 188-byte packets identified by PID.
- PAT is on PID 0 and points to each program's PMT; PMT lists the video, audio and data PIDs; CAT is on PID 1.
Flashcards
Exam tip: Learn the PSI chain PAT to PMT to elementary PIDs. Many video fault questions follow it step by step.
7. Tests and Measurements
SCTE's Tests and Measurements category and the Test Equipment and Maintenance course: spectrum analyzers, QAM analyzers, MER and BER, constellation reading, return path ingress and preventive maintenance.
Key facts
- Spectrum analyzers show power within the resolution bandwidth; for noise-like QAM signals use a channel power function or add 10 log (channel BW / RBW).
- MER measures modulation quality in dB; higher is better. Pre-FEC BER shows margin; post-FEC errors mean customers see impairments.
Flashcards
Exam tip: Learn to read a constellation picture by shape. SCTE likes scenario questions that describe one.
How to pass
- You need 38 of 50 correct for 76%, at 2.4 minutes per question. Open book only helps if your notes are indexed: keep a sheet of dBmV, subnet and bit-rate formulas ready.
- Facilities questions are about keeping the site up: -48 V DC plants, battery runtime, generators, grounding and HVAC. Think about what fails first in an outage.
- Expect headend RF and video detail: dBmV arithmetic, QAM and MER, MPEG transport stream tables, SCTE 35 cues and multicast for IP video.
- SCTE recommends its BTCS curriculum plus Network Specialist, DAA and IPTV courses, so expect Remote PHY and IP video questions, not only legacy analog.
Frequently asked questions
How long should I study for the SCTE BTCS exam?
Most working candidates need 4 to 8 weeks at 45 to 60 minutes a day. Book your exam once your Readiness Score has stayed at 80 or higher for about a week.
Can I take the SCTE BTCS exam online?
BICSI's v15 handbook describes the RCDD exam at Pearson VUE test centers, not remote proctoring. Format: open book: scte training materials, books, printed documents, notes, tables, calculators and internet resources are allowed (digital content in a separate tab of the same browser); ai tools are not allowed. Check pearsonvue.com/bicsi for the options in your country.
What score do I need to pass the SCTE BTCS exam?
76%. The exam has 50 multiple-choice questions and a time limit of 2 hours; the exam cannot be paused and breaks are not allowed.
What are the most tested topics?
The outline covers facilities: power, grounding and environment, baseband signaling and ip networking, digital telephony over cable, rf signals and headend combining, photonic signals and optical transport, video services and transport streams, tests and measurements. Use the free practice test to see which ones you need most.
The premium SCTE BTCS study path
Premium SCTE BTCS prep is studied one topic at a time. Each step starts with that topic's key notes and flashcard deck, then its own question sets of 25, so you master one topic before you move to the next. When every topic is strong, the 6 full mock exams show you're ready.
Your step-by-step study path
- 1Facilities: Power, Grounding and Environment9 key notes, 115 flashcards, then 450 practice questions in 18 sets of 25Notes free with an account
- 2Baseband Signaling and IP Networking9 key notes, 115 flashcards, then 425 practice questions in 17 sets of 25Premium
- 3Digital Telephony over Cable9 key notes, 115 flashcards, then 425 practice questions in 17 sets of 25Premium
- 4RF Signals and Headend Combining9 key notes, 115 flashcards, then 425 practice questions in 17 sets of 25Premium
- 5Photonic Signals and Optical Transport8 key notes, 115 flashcards, then 425 practice questions in 17 sets of 25Premium
- 6Video Services and Transport Streams8 key notes, 115 flashcards, then 425 practice questions in 17 sets of 25Premium
- 7Tests and Measurements8 key notes, 110 flashcards, then 425 practice questions in 17 sets of 25Premium
- Final step: 6 full mock exams50 questions each, timed like test day. Pass them, then book your exam.Premium
Get every note, flashcard and question
Premium Monthly
- The RCDD exam: full prep for the v15 blueprint
- 3,000 practice questions + 6 full mock exams per exam
- 800 flashcards + 60 key notes per exam, by topic, plus mind maps
- Spaced repetition + mistakes bank
- Readiness Score & detailed reports
- Video lessons as they release
- Content updates during your access
- 5 bonuses: numbers and formulas sheet, standards atlas, study planner and more
- Pass Guarantee: complete the prep, pass or 100% back
Renews monthly until you cancel. Cancel in two clicks from your account; you keep access until the end of the month you've paid for. No minimum term.
Premium Yearly
- The RCDD exam: full prep for the v15 blueprint
- 3,000 practice questions + 6 full mock exams per exam
- 800 flashcards + 60 key notes per exam, by topic, plus mind maps
- Spaced repetition + mistakes bank
- Readiness Score & detailed reports
- Video lessons as they release
- Content updates during your access
- 5 bonuses: numbers and formulas sheet, standards atlas, study planner and more
- Pass Guarantee: complete the prep, pass or 100% back
Renews once a year until you cancel. We email you before each renewal. Cancel any time from your account; you keep access until the end of the year you've paid for.
Summarized from BICSI's official candidate information and the rules cited, checked October 2026. Confirm current requirements with SCTE (Society of Cable Telecommunications Engineers), a subsidiary of CableLabs.