JVC KM-F250 - Revision history

Arclight-MCP-Bot: Wikilink RM-P250 references to new JVC RM-P250 page (via update-page on MediaWiki MCP Server)

2026-02-23T01:54:54Z

Wikilink RM-P250 references to new JVC RM-P250 page (via update-page on MediaWiki MCP Server)

← Older revision		Revision as of 01:54, 23 February 2026
Line 6:		Line 6:
	\|images=JVC KM-F250U rear.webp, JVC KM-F250U boards.webp, JVC KM-F250U service manual 1.webp, JVC KM-F250U service manual 2.webp, JVC KM-F250U service manual 3.webp, JVC KM-F250U service manual 4.webp, JVC KM-F250U service manual 5.webp, JVC KM-F250U service manual 6.webp, JVC KM-F250U service manual 7.webp, JVC KM-F250U service manual 8.webp, JVC KM-F250U service manual 9.webp, JVC KM-F250U service manual 10.webp, JVC KM-F250U service manual 11.webp		\|images=JVC KM-F250U rear.webp, JVC KM-F250U boards.webp, JVC KM-F250U service manual 1.webp, JVC KM-F250U service manual 2.webp, JVC KM-F250U service manual 3.webp, JVC KM-F250U service manual 4.webp, JVC KM-F250U service manual 5.webp, JVC KM-F250U service manual 6.webp, JVC KM-F250U service manual 7.webp, JVC KM-F250U service manual 8.webp, JVC KM-F250U service manual 9.webp, JVC KM-F250U service manual 10.webp, JVC KM-F250U service manual 11.webp
	\|suppress_gallery=yes		\|suppress_gallery=yes
	\|features=Full-frame time base correction, frame synchronization, dropout compensation (DOC), field freeze and frame freeze, multi-format signal/standard transcoding, genlock via external reference input, CCIR Rec. 601 (4:2:2) processing at 13.5 MHz 8-bit quantization, RS-170A compliant (NTSC models), 1 MB frame memory, proc amp controls (video level, chroma level, U-V balance, setup level — each switchable variable/unity), H position adjustment (±7 µsec), Y/C timing adjustment (±1 µsec), optional RM-P250 remote control unit, EIA 19" rack mountable		\|features=Full-frame time base correction, frame synchronization, dropout compensation (DOC), field freeze and frame freeze, multi-format signal/standard transcoding, genlock via external reference input, CCIR Rec. 601 (4:2:2) processing at 13.5 MHz 8-bit quantization, RS-170A compliant (NTSC models), 1 MB frame memory, proc amp controls (video level, chroma level, U-V balance, setup level — each switchable variable/unity), H position adjustment (±7 µsec), Y/C timing adjustment (±1 µsec), optional [[JVC RM-P250\|RM-P250]] remote control unit, EIA 19" rack mountable
	\|description=The JVC KM-F250 is a professional rack-mountable frame synchronizer with integrated full-frame time base correction, originally marketed by JVC's Professional Products division. Though officially designated a "frame synchronizer," the unit performs full-frame TBC processing conforming to CCIR Recommendation 601 at 13.5 MHz, 8-bit 4:2:2 sampling, effectively making it a multi-purpose TBC suitable for professional video production and archival workflows.		\|description=The JVC KM-F250 is a professional rack-mountable frame synchronizer with integrated full-frame time base correction, originally marketed by JVC's Professional Products division. Though officially designated a "frame synchronizer," the unit performs full-frame TBC processing conforming to CCIR Recommendation 601 at 13.5 MHz, 8-bit 4:2:2 sampling, effectively making it a multi-purpose TBC suitable for professional video production and archival workflows.

	The KM-F250 accepts composite (VBS), Y/C separate, and analog component (Y/R-Y/B-Y) video inputs. A loopthrough reference sync (black burst/genlock) input is provided for synchronizing output timing to external equipment, along with a dedicated DOC (dropout compensator) RF carrier input for use with VTRs that provide an RF output. The unit provides two composite video outputs, component outputs, Y/C separate outputs, and four sync reference outputs (ADV SYNC for VTR servo lock, REF SYNC composite sync, REF SC color subcarrier, and REF BB black burst).		The KM-F250 accepts composite (VBS), Y/C separate, and analog component (Y/R-Y/B-Y) video inputs. A loopthrough reference sync (black burst/genlock) input is provided for synchronizing output timing to external equipment, along with a dedicated DOC (dropout compensator) RF carrier input for use with VTRs that provide an RF output. The unit provides two composite video outputs, component outputs, Y/C separate outputs, and four sync reference outputs (ADV SYNC for VTR servo lock, REF SYNC composite sync, REF SC color subcarrier, and REF BB black burst).

	The unit includes comprehensive proc amp controls behind the front panel: video (Y) level, chroma level, U-V balance, and setup level — each with a variable/unity switch allowing ±3 dB adjustment (±10% for setup). An H position control allows output horizontal timing adjustment within ±7 µsec, and a Y/C timing control adjusts chroma-to-luminance phase within ±1 µsec. A chroma advance switch advances the chroma output by 1H with respect to luminance when enabled. All front-panel controls can be disabled via a LOCAL/REMOTE switch when using the optional RM-P250 remote control unit.		The unit includes comprehensive proc amp controls behind the front panel: video (Y) level, chroma level, U-V balance, and setup level — each with a variable/unity switch allowing ±3 dB adjustment (±10% for setup). An H position control allows output horizontal timing adjustment within ±7 µsec, and a Y/C timing control adjusts chroma-to-luminance phase within ±1 µsec. A chroma advance switch advances the chroma output by 1H with respect to luminance when enabled. All front-panel controls can be disabled via a LOCAL/REMOTE switch when using the optional [[JVC RM-P250]] remote control unit.

	The unit features field freeze and frame freeze functions, useful for still-frame capture in production environments.		The unit features field freeze and frame freeze functions, useful for still-frame capture in production environments.
Line 271:		Line 271:
	== See Also ==		== See Also ==

			* [[JVC RM-P250]] — Optional wired remote control unit
	* [[:Category:Frame synchronizers\|Frame synchronizers]]		* [[:Category:Frame synchronizers\|Frame synchronizers]]
	* [[:Category:Time base correctors and frame synchronizers\|Time base correctors and frame synchronizers]]		* [[:Category:Time base correctors and frame synchronizers\|Time base correctors and frame synchronizers]]

Arclight-MCP-Bot: Replace {{AV gallery}} with {{EveryCRT gallery}} (via update-page on MediaWiki MCP Server)

2026-02-10T19:21:34Z

Replace {{AV gallery}} with {{EveryCRT gallery}} (via update-page on MediaWiki MCP Server)

← Older revision		Revision as of 19:21, 10 February 2026
Line 183:		Line 183:

	== Photos ==		== Photos ==
	{{AV gallery\|heights=120~~\|mode=nolines~~}}		{{EveryCRT gallery\|heights=120}}

	== Signal Specifications ==		== Signal Specifications ==

Arclight at 19:11, 10 February 2026

2026-02-10T19:11:16Z

← Older revision		Revision as of 19:11, 10 February 2026
Line 183:		Line 183:

	== Photos ==		== Photos ==
	{{AV gallery\|heights=120}}		{{AV gallery\|heights=120\|mode=nolines}}

	== Signal Specifications ==		== Signal Specifications ==

Arclight-MCP-Bot: Use suppress_gallery=yes and {{AV gallery}} to display photos after Variants section (via update-page on MediaWiki MCP Server)

2026-02-10T19:03:51Z

Use suppress_gallery=yes and {{AV gallery}} to display photos after Variants section (via update-page on MediaWiki MCP Server)

← Older revision		Revision as of 19:03, 10 February 2026
Line 5:		Line 5:
	\|image_main=JVC KM-F250U front.webp		\|image_main=JVC KM-F250U front.webp
	\|images=JVC KM-F250U rear.webp, JVC KM-F250U boards.webp, JVC KM-F250U service manual 1.webp, JVC KM-F250U service manual 2.webp, JVC KM-F250U service manual 3.webp, JVC KM-F250U service manual 4.webp, JVC KM-F250U service manual 5.webp, JVC KM-F250U service manual 6.webp, JVC KM-F250U service manual 7.webp, JVC KM-F250U service manual 8.webp, JVC KM-F250U service manual 9.webp, JVC KM-F250U service manual 10.webp, JVC KM-F250U service manual 11.webp		\|images=JVC KM-F250U rear.webp, JVC KM-F250U boards.webp, JVC KM-F250U service manual 1.webp, JVC KM-F250U service manual 2.webp, JVC KM-F250U service manual 3.webp, JVC KM-F250U service manual 4.webp, JVC KM-F250U service manual 5.webp, JVC KM-F250U service manual 6.webp, JVC KM-F250U service manual 7.webp, JVC KM-F250U service manual 8.webp, JVC KM-F250U service manual 9.webp, JVC KM-F250U service manual 10.webp, JVC KM-F250U service manual 11.webp
			\|suppress_gallery=yes
	\|features=Full-frame time base correction, frame synchronization, dropout compensation (DOC), field freeze and frame freeze, multi-format signal/standard transcoding, genlock via external reference input, CCIR Rec. 601 (4:2:2) processing at 13.5 MHz 8-bit quantization, RS-170A compliant (NTSC models), 1 MB frame memory, proc amp controls (video level, chroma level, U-V balance, setup level — each switchable variable/unity), H position adjustment (±7 µsec), Y/C timing adjustment (±1 µsec), optional RM-P250 remote control unit, EIA 19" rack mountable		\|features=Full-frame time base correction, frame synchronization, dropout compensation (DOC), field freeze and frame freeze, multi-format signal/standard transcoding, genlock via external reference input, CCIR Rec. 601 (4:2:2) processing at 13.5 MHz 8-bit quantization, RS-170A compliant (NTSC models), 1 MB frame memory, proc amp controls (video level, chroma level, U-V balance, setup level — each switchable variable/unity), H position adjustment (±7 µsec), Y/C timing adjustment (±1 µsec), optional RM-P250 remote control unit, EIA 19" rack mountable
	\|description=The JVC KM-F250 is a professional rack-mountable frame synchronizer with integrated full-frame time base correction, originally marketed by JVC's Professional Products division. Though officially designated a "frame synchronizer," the unit performs full-frame TBC processing conforming to CCIR Recommendation 601 at 13.5 MHz, 8-bit 4:2:2 sampling, effectively making it a multi-purpose TBC suitable for professional video production and archival workflows.		\|description=The JVC KM-F250 is a professional rack-mountable frame synchronizer with integrated full-frame time base correction, originally marketed by JVC's Professional Products division. Though officially designated a "frame synchronizer," the unit performs full-frame TBC processing conforming to CCIR Recommendation 601 at 13.5 MHz, 8-bit 4:2:2 sampling, effectively making it a multi-purpose TBC suitable for professional video production and archival workflows.
Line 180:		Line 181:
	File:JVC KM-F250E rear.jpg\|JVC KM-F250E rear panel (European PAL variant)		File:JVC KM-F250E rear.jpg\|JVC KM-F250E rear panel (European PAL variant)
	</gallery>		</gallery>

			== Photos ==
			{{AV gallery\|heights=120}}

	== Signal Specifications ==		== Signal Specifications ==

Arclight: /* Variants */

2026-02-07T04:28:46Z

Variants

← Older revision		Revision as of 04:28, 7 February 2026
Line 177:		Line 177:

	<gallery>		<gallery>
	File:JVC KM-F250E front.jpg\|JVC KM-F250E front panel (European PAL variant)~~. Source: [https://www.next-archive.com/product/jvc-km-f250e/ NextArchive]~~		File:JVC KM-F250E front.jpg\|JVC KM-F250E front panel (European PAL variant)
	File:JVC KM-F250E rear.jpg\|JVC KM-F250E rear panel (European PAL variant)~~. Source: [https://www.next-archive.com/product/jvc-km-f250e/ NextArchive]~~		File:JVC KM-F250E rear.jpg\|JVC KM-F250E rear panel (European PAL variant)
	</gallery>		</gallery>

Arclight-MCP-Bot: Move variant descriptions from infobox description to new Variants article section with KM-F250E photos; remove duplicate Photos heading (via update-page on MediaWiki MCP Server)

2026-02-07T04:22:27Z

Move variant descriptions from infobox description to new Variants article section with KM-F250E photos; remove duplicate Photos heading (via update-page on MediaWiki MCP Server)

← Older revision		Revision as of 04:22, 7 February 2026
Line 4:		Line 4:
	\|device_type=Frame synchronizer		\|device_type=Frame synchronizer
	\|image_main=JVC KM-F250U front.webp		\|image_main=JVC KM-F250U front.webp
	\|images=JVC KM-F250U rear.webp~~, JVC KM-F250E front.jpg, JVC KM-F250E rear.jpg~~, JVC KM-F250U boards.webp, JVC KM-F250U service manual 1.webp, JVC KM-F250U service manual 2.webp, JVC KM-F250U service manual 3.webp, JVC KM-F250U service manual 4.webp, JVC KM-F250U service manual 5.webp, JVC KM-F250U service manual 6.webp, JVC KM-F250U service manual 7.webp, JVC KM-F250U service manual 8.webp, JVC KM-F250U service manual 9.webp, JVC KM-F250U service manual 10.webp, JVC KM-F250U service manual 11.webp		\|images=JVC KM-F250U rear.webp, JVC KM-F250U boards.webp, JVC KM-F250U service manual 1.webp, JVC KM-F250U service manual 2.webp, JVC KM-F250U service manual 3.webp, JVC KM-F250U service manual 4.webp, JVC KM-F250U service manual 5.webp, JVC KM-F250U service manual 6.webp, JVC KM-F250U service manual 7.webp, JVC KM-F250U service manual 8.webp, JVC KM-F250U service manual 9.webp, JVC KM-F250U service manual 10.webp, JVC KM-F250U service manual 11.webp
	\|features=Full-frame time base correction, frame synchronization, dropout compensation (DOC), field freeze and frame freeze, multi-format signal/standard transcoding, genlock via external reference input, CCIR Rec. 601 (4:2:2) processing at 13.5 MHz 8-bit quantization, RS-170A compliant (NTSC models), 1 MB frame memory, proc amp controls (video level, chroma level, U-V balance, setup level — each switchable variable/unity), H position adjustment (±7 µsec), Y/C timing adjustment (±1 µsec), optional RM-P250 remote control unit, EIA 19" rack mountable		\|features=Full-frame time base correction, frame synchronization, dropout compensation (DOC), field freeze and frame freeze, multi-format signal/standard transcoding, genlock via external reference input, CCIR Rec. 601 (4:2:2) processing at 13.5 MHz 8-bit quantization, RS-170A compliant (NTSC models), 1 MB frame memory, proc amp controls (video level, chroma level, U-V balance, setup level — each switchable variable/unity), H position adjustment (±7 µsec), Y/C timing adjustment (±1 µsec), optional RM-P250 remote control unit, EIA 19" rack mountable
	\|description=The JVC KM-F250 is a professional rack-mountable frame synchronizer with integrated full-frame time base correction, originally marketed by JVC's Professional Products division. Though officially designated a "frame synchronizer," the unit performs full-frame TBC processing conforming to CCIR Recommendation 601 at 13.5 MHz, 8-bit 4:2:2 sampling, effectively making it a multi-purpose TBC suitable for professional video production and archival workflows.		\|description=The JVC KM-F250 is a professional rack-mountable frame synchronizer with integrated full-frame time base correction, originally marketed by JVC's Professional Products division. Though officially designated a "frame synchronizer," the unit performs full-frame TBC processing conforming to CCIR Recommendation 601 at 13.5 MHz, 8-bit 4:2:2 sampling, effectively making it a multi-purpose TBC suitable for professional video production and archival workflows.
Line 14:		Line 14:
	The unit features field freeze and frame freeze functions, useful for still-frame capture in production environments.		The unit features field freeze and frame freeze functions, useful for still-frame capture in production environments.

	~~The KM-F250 was produced in several regional variants with significant differences in Y/C signal handling:~~		Internally, the KM-F250 comprises ten circuit boards: RL (relay/bypass switching), CN (connector interface), MT (mounting/interconnect), VIDEO (analog signal processing), MEMORY (digital TBC/frame memory with A/D and D/A conversion), SG (sync generator/SSG), PS (switching power supply producing +12V, −12V, and +5V), REG (voltage regulator converting ±12V to ±9V for video circuits), SUB (subsidiary functions), and PB DET (playback detection).<ref name="service-manual">[[:Document:JVC KM-F250E Service Manual]] — JVC service manual No. 6455 for the KM-F250E. Contains circuit descriptions, adjustment procedures, exploded views, parts lists, and schematic diagrams.</ref>
	* '''KM-F250U''' — NTSC variant for the US market (120V, 60Hz). Y/C uses a [[Hirose 7-pin DUB]] connector supporting both S-VHS (3.58 MHz) and U-matic DUB (688 kHz) modes, selectable via internal switches behind the front panel.<ref name="bcs-listing">[https://www.broadcaststore.com/store/model_detail.cfm?id=7814 BroadcastStore.com — "JVC KM-F250U TBC &/or Frame Synchronizer"] — US broadcast equipment dealer listing confirming KM-F250U model designation.</ref><ref name="reddit-kmf250u">[https://www.reddit.com/r/VIDEOENGINEERING/comments/1erdlcu/my_jvc_kmf250_frame_synchronizertime_base/ Reddit r/VIDEOENGINEERING — "My JVC KM-F250 Frame Synchronizer/Time Base Corrector"] — Owner photos of a KM-F250U unit showing front panel, rear I/O, and internal components.</ref>
	* '''KM-F250E''' — European PAL variant (100–240V, 50/60Hz). Y/C uses a 7-pin DIN connector (with included 7P-to-BNC adapter cable). Supports Y/C 443 at 4.43 MHz (PAL S-VHS), Y/C 924 at 924 kHz (hi-band U-VCR), and Y/C 629 at 629 kHz (VHS). Output Y/C format is selectable via a rear-panel switch (443/924/629), while input Y/C format is set via an internal select pin.<ref name="service-manual">[[:Document:JVC KM-F250E Service Manual]] — JVC service manual No. 6455 for the KM-F250E. Contains circuit descriptions, adjustment procedures, exploded views, parts lists, and schematic diagrams.</ref>
	* '''KM-F250EG''' — European PAL variant (230V, 50Hz)

	The European variants accept PAL input and can output NTSC 4.43 (pseudo-NTSC with PAL subcarrier frequency), functioning as a basic standards transcoder. The unit was designed for use with consumer and semi-professional video systems including S-VHS, VHS, U-matic, and other formats.

	Internally, the KM-F250 comprises ten circuit boards: RL (relay/bypass switching), CN (connector interface), MT (mounting/interconnect), VIDEO (analog signal processing), MEMORY (digital TBC/frame memory with A/D and D/A conversion), SG (sync generator/SSG), PS (switching power supply producing +12V, −12V, and +5V), REG (voltage regulator converting ±12V to ±9V for video circuits), SUB (subsidiary functions), and PB DET (playback detection).<ref name="service-manual" />

	The KM-F250 is relatively obscure compared to competing TBCs from FOR-A, DataVideo, and Snell & Wilcox, but is encountered in both US broadcast facilities and European archival environments.		The KM-F250 is relatively obscure compared to competing TBCs from FOR-A, DataVideo, and Snell & Wilcox, but is encountered in both US broadcast facilities and European archival environments.
Line 173:		Line 166:
	\|link_url=https://www.next-archive.com/product/jvc-km-f250e/		\|link_url=https://www.next-archive.com/product/jvc-km-f250e/
	}}		}}
	== ~~Photos~~ ==		== Variants ==

			The KM-F250 was produced in several regional variants with significant differences in Y/C signal handling and power supply configuration:

			* '''KM-F250U''' — NTSC variant for the US market (120V, 60Hz). Y/C uses a [[Hirose 7-pin DUB]] connector supporting both S-VHS (3.58 MHz) and U-matic DUB (688 kHz) modes, selectable via internal switches behind the front panel.<ref name="bcs-listing">[https://www.broadcaststore.com/store/model_detail.cfm?id=7814 BroadcastStore.com — "JVC KM-F250U TBC &/or Frame Synchronizer"] — US broadcast equipment dealer listing confirming KM-F250U model designation.</ref><ref name="reddit-kmf250u">[https://www.reddit.com/r/VIDEOENGINEERING/comments/1erdlcu/my_jvc_kmf250_frame_synchronizertime_base/ Reddit r/VIDEOENGINEERING — "My JVC KM-F250 Frame Synchronizer/Time Base Corrector"] — Owner photos of a KM-F250U unit showing front panel, rear I/O, and internal components.</ref>
			* '''KM-F250E''' — European PAL variant (100–240V, 50/60Hz). Y/C uses a 7-pin DIN connector (with included 7P-to-BNC adapter cable). Supports Y/C 443 at 4.43 MHz (PAL S-VHS), Y/C 924 at 924 kHz (hi-band U-VCR), and Y/C 629 at 629 kHz (VHS). Output Y/C format is selectable via a rear-panel switch (443/924/629), while input Y/C format is set via an internal select pin.<ref name="service-manual" />
			* '''KM-F250EG''' — European PAL variant (230V, 50Hz)

			The European variants accept PAL input and can output NTSC 4.43 (pseudo-NTSC with PAL subcarrier frequency), functioning as a basic standards transcoder. The unit was designed for use with consumer and semi-professional video systems including S-VHS, VHS, U-matic, and other formats.

	<gallery>		<gallery>

Arclight-MCP-Bot: Add KM-F250E front and rear photos from NextArchive to images field (via update-page on MediaWiki MCP Server)

2026-02-07T04:18:22Z

Add KM-F250E front and rear photos from NextArchive to images field (via update-page on MediaWiki MCP Server)

← Older revision		Revision as of 04:18, 7 February 2026
Line 4:		Line 4:
	\|device_type=Frame synchronizer		\|device_type=Frame synchronizer
	\|image_main=JVC KM-F250U front.webp		\|image_main=JVC KM-F250U front.webp
	\|images=JVC KM-F250U rear.webp, JVC KM-F250U boards.webp, JVC KM-F250U service manual 1.webp, JVC KM-F250U service manual 2.webp, JVC KM-F250U service manual 3.webp, JVC KM-F250U service manual 4.webp, JVC KM-F250U service manual 5.webp, JVC KM-F250U service manual 6.webp, JVC KM-F250U service manual 7.webp, JVC KM-F250U service manual 8.webp, JVC KM-F250U service manual 9.webp, JVC KM-F250U service manual 10.webp, JVC KM-F250U service manual 11.webp		\|images=JVC KM-F250U rear.webp, JVC KM-F250E front.jpg, JVC KM-F250E rear.jpg, JVC KM-F250U boards.webp, JVC KM-F250U service manual 1.webp, JVC KM-F250U service manual 2.webp, JVC KM-F250U service manual 3.webp, JVC KM-F250U service manual 4.webp, JVC KM-F250U service manual 5.webp, JVC KM-F250U service manual 6.webp, JVC KM-F250U service manual 7.webp, JVC KM-F250U service manual 8.webp, JVC KM-F250U service manual 9.webp, JVC KM-F250U service manual 10.webp, JVC KM-F250U service manual 11.webp
	\|features=Full-frame time base correction, frame synchronization, dropout compensation (DOC), field freeze and frame freeze, multi-format signal/standard transcoding, genlock via external reference input, CCIR Rec. 601 (4:2:2) processing at 13.5 MHz 8-bit quantization, RS-170A compliant (NTSC models), 1 MB frame memory, proc amp controls (video level, chroma level, U-V balance, setup level — each switchable variable/unity), H position adjustment (±7 µsec), Y/C timing adjustment (±1 µsec), optional RM-P250 remote control unit, EIA 19" rack mountable		\|features=Full-frame time base correction, frame synchronization, dropout compensation (DOC), field freeze and frame freeze, multi-format signal/standard transcoding, genlock via external reference input, CCIR Rec. 601 (4:2:2) processing at 13.5 MHz 8-bit quantization, RS-170A compliant (NTSC models), 1 MB frame memory, proc amp controls (video level, chroma level, U-V balance, setup level — each switchable variable/unity), H position adjustment (±7 µsec), Y/C timing adjustment (±1 µsec), optional RM-P250 remote control unit, EIA 19" rack mountable
	\|description=The JVC KM-F250 is a professional rack-mountable frame synchronizer with integrated full-frame time base correction, originally marketed by JVC's Professional Products division. Though officially designated a "frame synchronizer," the unit performs full-frame TBC processing conforming to CCIR Recommendation 601 at 13.5 MHz, 8-bit 4:2:2 sampling, effectively making it a multi-purpose TBC suitable for professional video production and archival workflows.		\|description=The JVC KM-F250 is a professional rack-mountable frame synchronizer with integrated full-frame time base correction, originally marketed by JVC's Professional Products division. Though officially designated a "frame synchronizer," the unit performs full-frame TBC processing conforming to CCIR Recommendation 601 at 13.5 MHz, 8-bit 4:2:2 sampling, effectively making it a multi-purpose TBC suitable for professional video production and archival workflows.
Line 173:		Line 173:
	\|link_url=https://www.next-archive.com/product/jvc-km-f250e/		\|link_url=https://www.next-archive.com/product/jvc-km-f250e/
	}}		}}
			== Photos ==

			<gallery>
			File:JVC KM-F250E front.jpg\|JVC KM-F250E front panel (European PAL variant). Source: [https://www.next-archive.com/product/jvc-km-f250e/ NextArchive]
			File:JVC KM-F250E rear.jpg\|JVC KM-F250E rear panel (European PAL variant). Source: [https://www.next-archive.com/product/jvc-km-f250e/ NextArchive]
			</gallery>

	== Signal Specifications ==		== Signal Specifications ==

Arclight at 03:42, 7 February 2026

2026-02-07T03:42:33Z

← Older revision		Revision as of 03:42, 7 February 2026
Line 26:		Line 26:
	\|weight=6.9 kg		\|weight=6.9 kg
	\|av_system=NTSC, NTSC 4.43, PAL		\|av_system=NTSC, NTSC 4.43, PAL
	\|frequency=50Hz,60Hz		\|frequency=50Hz, 60Hz
	\|power_avg=40		\|power_avg=40
	}}		}}
Line 73:		Line 73:
	\|signal=Component (YPbPr)		\|signal=Component (YPbPr)
	\|connector=BNC		\|connector=BNC
	\|count=3		\|count=1
	\|audio=None		\|audio=None
	\|location=rear		\|location=rear
Line 82:		Line 82:
	\|signal=Composite (CVBS)		\|signal=Composite (CVBS)
	\|connector=BNC		\|connector=BNC
	\|count=2		\|count=1
	\|audio=None		\|audio=None
	\|location=rear		\|location=rear
Line 128:		Line 128:
	\|signal=Component (YPbPr)		\|signal=Component (YPbPr)
	\|connector=BNC		\|connector=BNC
	\|count=3		\|count=1
	\|location=rear		\|location=rear
	\|notes=Analog component Y/R-Y/B-Y output via three BNC connectors. Y: 1.0 Vp-p (with sync), 75 ohms; R-Y/B-Y: 0.7 Vp-p (100% colour bars), 0.486 Vp-p (75%), 75 ohms.		\|notes=Analog component Y/R-Y/B-Y output via three BNC connectors. Y: 1.0 Vp-p (with sync), 75 ohms; R-Y/B-Y: 0.7 Vp-p (100% colour bars), 0.486 Vp-p (75%), 75 ohms.

Arclight-MCP-Bot: Fix Y/C I/O entries: consolidate to two entries per connector (S-VHS and U-VCR modes), add REF SC output, fix description text (via update-page on MediaWiki MCP Server)

2026-02-07T03:38:42Z

Fix Y/C I/O entries: consolidate to two entries per connector (S-VHS and U-VCR modes), add REF SC output, fix description text (via update-page on MediaWiki MCP Server)

Show changes

Arclight at 03:30, 7 February 2026

2026-02-07T03:30:56Z

← Older revision		Revision as of 03:30, 7 February 2026
Line 4:		Line 4:
	\|device_type=Frame synchronizer		\|device_type=Frame synchronizer
	\|image_main=JVC KM-F250U front.webp		\|image_main=JVC KM-F250U front.webp
	\|images=JVC KM-F250U rear.webp, JVC KM-F250U boards.webp, JVC KM-F250U service manual 1.webp, JVC KM-F250U service manual 2.webp, JVC KM-F250U service manual 3.webp, JVC KM-F250U service manual 4.webp, JVC KM-F250U service manual 5.webp, JVC KM-F250U service manual 6.webp, JVC KM-F250U service manual 7.webp		\|images=JVC KM-F250U rear.webp, JVC KM-F250U boards.webp, JVC KM-F250U service manual 1.webp, JVC KM-F250U service manual 2.webp, JVC KM-F250U service manual 3.webp, JVC KM-F250U service manual 4.webp, JVC KM-F250U service manual 5.webp, JVC KM-F250U service manual 6.webp, JVC KM-F250U service manual 7.webp, JVC KM-F250U service manual 8.webp, JVC KM-F250U service manual 9.webp, JVC KM-F250U service manual 10.webp, JVC KM-F250U service manual 11.webp
	\|features=Full-frame time base correction, frame synchronization, dropout compensation (DOC), field freeze and frame freeze, multi-format signal/standard transcoding, genlock via external reference input, CCIR Rec. 601 (4:2:2) processing at 13.5 MHz 8-bit quantization, RS-170A compliant (NTSC models), 1 MB frame memory, proc amp controls (video level, chroma level, U-V balance, setup level — each switchable variable/unity), H position adjustment (±7 µsec), Y/C timing adjustment (±1 µsec), optional RM-P250 remote control unit, EIA 19" rack mountable		\|features=Full-frame time base correction, frame synchronization, dropout compensation (DOC), field freeze and frame freeze, multi-format signal/standard transcoding, genlock via external reference input, CCIR Rec. 601 (4:2:2) processing at 13.5 MHz 8-bit quantization, RS-170A compliant (NTSC models), 1 MB frame memory, proc amp controls (video level, chroma level, U-V balance, setup level — each switchable variable/unity), H position adjustment (±7 µsec), Y/C timing adjustment (±1 µsec), optional RM-P250 remote control unit, EIA 19" rack mountable
	\|description=The JVC KM-F250 is a professional rack-mountable frame synchronizer with integrated full-frame time base correction, originally marketed by JVC's Professional Products division. Though officially designated a "frame synchronizer," the unit performs full-frame TBC processing conforming to CCIR Recommendation 601 at 13.5 MHz, 8-bit 4:2:2 sampling, effectively making it a multi-purpose TBC suitable for professional video production and archival workflows.		\|description=The JVC KM-F250 is a professional rack-mountable frame synchronizer with integrated full-frame time base correction, originally marketed by JVC's Professional Products division. Though officially designated a "frame synchronizer," the unit performs full-frame TBC processing conforming to CCIR Recommendation 601 at 13.5 MHz, 8-bit 4:2:2 sampling, effectively making it a multi-purpose TBC suitable for professional video production and archival workflows.