ENUM FE_GUARD_INTERVAL(9)

💫 enum fe_guard_interval(9) 💫

okay bestie, welcome to the Kernel API Manual entry for enum fe_guard_interval — yes that's the whole name, iconic of it honestly 🎀

---

🌸 NAME 🌸

enum fe_guard_interval — the guard interval enum, aka the thing that tells your DVB frontend how much breathing room to give between symbols ✨

---

🦋 SYNOPSIS 🦋

enum fe_guard_interval {
    GUARD_INTERVAL_1_32 ,
    GUARD_INTERVAL_1_16 ,
    GUARD_INTERVAL_1_8 ,
    GUARD_INTERVAL_1_4 ,
    GUARD_INTERVAL_AUTO ,
    GUARD_INTERVAL_1_128 ,
    GUARD_INTERVAL_19_128 ,
    GUARD_INTERVAL_19_256 ,
    GUARD_INTERVAL_PN420 ,
    GUARD_INTERVAL_PN595 ,
    GUARD_INTERVAL_PN945 ,
    GUARD_INTERVAL_1_64

};

like, look at that list. twelve whole constants. main character energy, no cap 💅

---

💜 Constants 💜

okay so here's every single one, in the exact order the header gives them (iykyk, order matters):

• GUARD_INTERVAL_1_32 — guard interval of 1/32 💖
• GUARD_INTERVAL_1_16 — guard interval of 1/16 🫶
• GUARD_INTERVAL_1_8 — guard interval of 1/8 ⭐
• GUARD_INTERVAL_1_4 — guard interval of 1/4 🌸
• GUARD_INTERVAL_AUTO — autodetect the guard interval 🔥 (let the hardware figure it out, we love a self-sufficient icon)
• GUARD_INTERVAL_1_128 — guard interval of 1/128 🦋
• GUARD_INTERVAL_19_128 — guard interval of 19/128 🎀
• GUARD_INTERVAL_19_256 — guard interval of 19/256 👑
• GUARD_INTERVAL_PN420 — PN length 420, which is 1/4 🌈
• GUARD_INTERVAL_PN595 — PN length 595, which is 1/6 💫
• GUARD_INTERVAL_PN945 — PN length 945, which is 1/9 🍓
• GUARD_INTERVAL_1_64 — guard interval of 1/64 💀 (and yes, it's listed after the PN ones, that's just how the header rolls, don't come for me)

---

✨ Description ✨

lowkey the most important bit: not all guard intervals are supported by a given standard. 🙈

so like, don't just assume any of these will work with whatever standard you're on — check first, bestie. it's giving "read the room" but for hardware 🧚

---

🔮 SEE ALSO 🔮

all the siblings and cousins, fr fr — from the kernel file ./include/uapi/linux/dvb/frontend.h:

enum fe_caps(9), struct dvb_frontend_info(9), struct dvb_diseqc_master_cmd(9), struct dvb_diseqc_slave_reply(9), enum fe_sec_voltage(9), enum fe_sec_tone_mode(9), enum fe_sec_mini_cmd(9), enum fe_status(9), enum fe_spectral_inversion(9), enum fe_code_rate(9), enum fe_modulation(9), enum fe_transmit_mode(9), enum fe_hierarchy(9), enum fe_interleaving(9), enum fe_pilot(9), enum fe_rolloff(9), enum fe_delivery_system(9), enum atscmh_sccc_block_mode(9), enum atscmh_sccc_code_mode(9), enum atscmh_rs_frame_ensemble(9), enum atscmh_rs_frame_mode(9), enum atscmh_rs_code_mode(9), enum fecap_scale_params(9), struct dtv_stats(9), struct dtv_fe_stats(9), struct dtv_property(9), struct dtv_properties(9)

like, that's the whole friend group 🫶 go say hi.

---

ngl, if you got this far you're genuinely doing amazing. go forth and guard those intervals 💅💖

mwah 💋 — this page lives in ./include/uapi/linux/dvb, dated October 2026, and it's titled enum fe_guard_interval(9). that's the whole vibe. slay.