SCTE DEP Exam Study Guide (2026)
Everything the SCTE DOCSIS Engineering Professional (DEP) 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 questions |
|---|---|
| Time | 3 hours (DEP, DVEP and IPEP get 3 hours; most SCTE exams get 2). The exam cannot be paused and breaks are not allowed |
| Passing score | 76% |
| Format | Open book under the SCTE Certification Exam Integrity Policy: SCTE online training materials, books, printed documents, notes, tables, calculators and internet resources are allowed (digital content in a tab of the same browser), but AI tools and AI-enabled search are banned. Written knowledge exam only |
| Certifying body | SCTE, a subsidiary of CableLabs; DEP is offered in partnership with CableLabs |
| Test provider | Bought from the SCTE online exam catalog and taken online with Proctorio remote proctoring in a Chromium browser (Chrome or Edge); the exam must be taken within one year of purchase |
Mind map: the whole exam on one screen
Read the complete SCTE DEP study notes for “Architecture: HFC, CCAP and Distributed Access”
Our first full set of comprehensive notes, about 12 minutes of reading: The HFC path · CMTS and CCAP · Service groups and capacity · Distributed access, 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. Architecture: HFC, CCAP and Distributed Access
SCTE DEP category Architecture: the hybrid fiber-coax network from headend to modem, the CMTS and CCAP platform, service groups, and distributed access (Remote PHY and Remote MACPHY). SCTE does not publish DEP topic weights.
Key facts
- HFC: headend or hub, optical node, coaxial trunk and distribution with amplifiers and taps, drop and in-home wiring to the cable modem (CM).
- The CMTS terminates DOCSIS: it schedules the shared upstream, modulates the downstream and routes subscriber traffic to the operator's IP network.
- CCAP (Converged Cable Access Platform) combines CMTS and edge QAM video functions in one chassis with much higher channel density.
- A service group is the set of modems sharing the same downstream and upstream channels; node splits shrink it to add capacity per home.
- Remote PHY moves the PHY into a Remote PHY Device (RPD) in the node; the CCAP core keeps the MAC. DEPI carries downstream and UEPI upstream over L2TPv3 pseudowires, with GCP for device control.
- Remote MACPHY moves both MAC and PHY into the node; the headend becomes an Ethernet aggregation site.
- Distributed access replaces analog optics with digital Ethernet fiber, improving MER at the node and allowing longer fiber runs.
- Back-office servers (DHCP, TFTP, ToD, provisioning) sit behind the CMTS and are needed for every modem to come online.
Flashcards
Exam tip: For any architecture question, first place each function (PHY, MAC, scheduler, routing, provisioning) in its box. Most wrong options put one of them in the wrong place.
2. DOCSIS Versions and Spectrum Plans
Covers DOCSIS 1.0 to 3.1 as named on the SCTE DEP page, plus the spectrum splits operators use. Part of SCTE's Architecture and DOCSIS Layering categories; no weights published.
Key facts
- DOCSIS 1.0: best-effort high-speed data with baseline privacy (BPI).
- DOCSIS 1.1: QoS with service flows and classifiers, UGS for voice, BPI+ with X.509 certificates.
- DOCSIS 2.0: advanced TDMA (ATDMA) and S-CDMA upstream, 6.4 MHz channels and 64-QAM, about three times 1.1 upstream capacity.
- DOCSIS 3.0: downstream and upstream channel bonding, IPv6 support and enhanced multicast.
- DOCSIS 3.1: OFDM downstream (up to 192 MHz channels) and OFDMA upstream, LDPC FEC, up to 4096-QAM, multiple modulation profiles and an extended downstream to 1218 MHz (optionally 1794 MHz).
- Splits: sub-split 5 to 42 MHz up and 54 MHz down; mid-split 5 to 85 up and 108 down; high-split 5 to 204 up and 258 down. EuroDOCSIS uses 5 to 65 MHz up and 8 MHz downstream channels.
- DOCSIS 4.0 (beyond the DEP scope stated by SCTE) adds Extended Spectrum DOCSIS to 1.8 GHz and Full Duplex DOCSIS.
- Each version is backward compatible: older modems work on newer CMTSs using the channel types they support.
Flashcards
Exam tip: Build a one-line timeline: 1.0 data, 1.1 QoS and BPI+, 2.0 ATDMA, 3.0 bonding and IPv6, 3.1 OFDM. Version questions become lookups.
3. DOCSIS Layering: Physical Layer
SCTE DEP category DOCSIS Layering, PHY side: SC-QAM and ATDMA channels, OFDM and OFDMA, FEC, cyclic prefix, profiles and the PHY Link Channel. No weights published.
Key facts
- North American SC-QAM downstream (ITU-T J.83 Annex B): 6 MHz channels, 256-QAM at 5.360537 Msym/s (about 42.9 Mbps raw, about 38 Mbps usable) and 64-QAM at 5.056941 Msym/s.
- Upstream ATDMA: 1.6, 3.2 or 6.4 MHz channels at 1.28, 2.56 or 5.12 Msym/s, QPSK to 64-QAM; raw rate = symbol rate x bits per symbol.
- OFDM downstream: 25 kHz (8K FFT) or 50 kHz (4K FFT) subcarrier spacing, sampled at 204.8 MHz; up to 192 MHz per channel.
- OFDMA upstream: 25 or 50 kHz spacing, channels up to 95 MHz, with minislots made of groups of subcarriers.
- Cyclic prefix guards against micro-reflections: it must exceed the echo delay. Downstream values run from 192 to 1024 samples (0.94 to 5 µs).
- Windowing (roll-off) tapers symbol edges to reduce out-of-band leakage between adjacent channels.
- Interleaving spreads burst errors in time so FEC can correct them; longer interleaving adds latency.
- The PHY Link Channel (PLC) in each OFDM channel tells modems the channel parameters and timing; profile A is the boot profile all 3.1 modems can receive.
Flashcards
Exam tip: For any rate calculation, write symbol rate x bits per symbol first, then apply overhead. Most distractors multiply the bandwidth instead of the symbol rate.
Test yourself on these topics
Take the free 15-question SCTE DEP test, then save your results to unlock your Readiness Score and the mistakes bank.
4. DOCSIS Layering: MAC, Ranging and Scheduling
SCTE DEP category DOCSIS Layering, MAC side: MAC management messages, ranging, upstream request-grant scheduling, service flows and bonding. No weights published.
Key facts
- Key MAC management messages: SYNC (timing), UCD (upstream channel parameters), MAP (upstream allocations), MDD (MAC domain settings), RNG-REQ/RNG-RSP (ranging), REG-REQ/REG-RSP (registration).
- Initial ranging sets the modem's timing offset, transmit power and frequency; station maintenance then repeats it periodically.
Flashcards
Exam tip: Learn the MAC messages as a story: SYNC for time, UCD and MAP for the upstream, RNG for ranging, MDD for the domain, REG to register.
5. DOCSIS Operations: Provisioning and Registration
SCTE DEP category DOCSIS Operations: how a modem comes online, the config file and its MICs, and the back-office protocols. No weights published.
Key facts
- Online sequence: scan and lock downstream, read MDD and UCD, initial ranging, DHCP, Time of Day, TFTP config file, registration, then BPI+ (or Early Authentication and Encryption first if enabled).
- DHCP gives the modem its IP address, TFTP server address and config file name; the modem's IP is on the operator's management network.
Flashcards
Exam tip: When a modem is stuck, place it in the online sequence first: no ranging, no DHCP, no TFTP or rejected registration each have different causes.
6. DOCSIS Operations: Plant Performance and PNM
SCTE DEP categories DOCSIS Operations and Enablement: RF levels, MER and codeword errors, impairments, and proactive network maintenance (PNM) tools. No weights published.
Key facts
- DOCSIS 3.0 modem downstream input range is -15 to +15 dBmV per SC-QAM channel; operators usually target a tighter window.
- MER measures modulation quality; 256-QAM needs much higher MER than 64-QAM. Codeword errors (correctable and uncorrectable) show whether FEC is coping.
Flashcards
Exam tip: Ask two questions before answering a troubleshooting item: which direction, and how many modems? That narrows the fault to a section of plant.
7. DOCSIS Enablement: Security, IPv6 and Services
SCTE DEP category DOCSIS Enablement: BPI+ security, IPv6 provisioning, multicast, voice and business services over DOCSIS. No weights published.
Key facts
- BPI+ authenticates modems with X.509 certificates (device, manufacturer, DOCSIS root) and encrypts traffic with traffic encryption keys (TEKs) under an authorization key (AK).
- DOCSIS 3.0 uses AES-128 for traffic encryption; older systems used 56-bit DES.
Flashcards
Exam tip: Security questions usually test who holds which key or certificate. Draw the chain: root, manufacturer, device, then AK and TEK.
How to pass
- The exam is open book, so build a one-page sheet of numbers you will look up anyway: split frequencies, SC-QAM symbol rates, OFDM subcarrier spacings, cyclic prefix sizes and the registration message order. Searching a 900-page spec mid-exam wastes the 3 hours.
- SCTE says DEP spans DOCSIS 1.0 to 3.1. Know which feature arrived in which version: QoS and BPI+ in 1.1, ATDMA in 2.0, bonding and IPv6 in 3.0, OFDM, OFDMA and LDPC in 3.1.
- Troubleshooting questions usually hinge on direction: T3 timeouts and pre-equalization point upstream, T4 timeouts and downstream MER point downstream. Decide which path is at fault before reading the options.
- 50 questions in 3 hours is 3.6 minutes each, and you need 38 right. Do the calculation items (bit rates, subcarrier counts, echo delays) carefully rather than fast.
Frequently asked questions
How long should I study for the SCTE DEP 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 DEP exam online?
BICSI's v15 handbook describes the RCDD exam at Pearson VUE test centers, not remote proctoring. Format: open book under the scte certification exam integrity policy: scte online training materials, books, printed documents, notes, tables, calculators and internet resources are allowed (digital content in a tab of the same browser), but ai tools and ai-enabled search are banned. written knowledge exam only. Check pearsonvue.com/bicsi for the options in your country.
What score do I need to pass the SCTE DEP exam?
76%. The exam has 50 questions and a time limit of 3 hours (dep, dvep and ipep get 3 hours; most scte exams get 2). the exam cannot be paused and breaks are not allowed.
What are the most tested topics?
The outline covers architecture: hfc, ccap and distributed access, docsis versions and spectrum plans, docsis layering: physical layer, docsis layering: mac, ranging and scheduling, docsis operations: provisioning and registration, docsis operations: plant performance and pnm, docsis enablement: security, ipv6 and services. Use the free practice test to see which ones you need most.
The premium SCTE DEP study path
Premium SCTE DEP 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
- 1Architecture: HFC, CCAP and Distributed Access9 key notes, 115 flashcards, then 450 practice questions in 18 sets of 25Notes free with an account
- 2DOCSIS Versions and Spectrum Plans9 key notes, 115 flashcards, then 425 practice questions in 17 sets of 25Premium
- 3DOCSIS Layering: Physical Layer9 key notes, 115 flashcards, then 425 practice questions in 17 sets of 25Premium
- 4DOCSIS Layering: MAC, Ranging and Scheduling9 key notes, 115 flashcards, then 425 practice questions in 17 sets of 25Premium
- 5DOCSIS Operations: Provisioning and Registration8 key notes, 115 flashcards, then 425 practice questions in 17 sets of 25Premium
- 6DOCSIS Operations: Plant Performance and PNM8 key notes, 115 flashcards, then 425 practice questions in 17 sets of 25Premium
- 7DOCSIS Enablement: Security, IPv6 and Services8 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
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- 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, a subsidiary of CableLabs; DEP is offered in partnership with CableLabs.