SWT3-81-PR Presentation Switcher HDBaseT USB-C HDMI 4K

Description

The SWT3-81-PR is an 8×1 presentation switcher designed to manage AV and USB streams across local and remote displays. It accepts USB-C and HDMI sources and provides mirrored HDMI output plus an interchangeable HDBaseT 3.0 port. The unit supports multi-view layouts and fast switching for live presentations and collaborative sessions.

Key capabilities include dual-screen USB-C MST support, advanced multi-view processing such as side-by-side and picture-in-picture, and built-in ProcAmp scaling for up or down conversion. The switcher performs AV and USB routing with sub-second switching times and supports HDCP 2.3. Integrated audio DSP provides echo cancellation and enhancement for clear room audio.

Video performance reaches up to 4K@60Hz 4:4:4 24bpp with a maximum bandwidth of 18 Gbps and minimum input scaled resolution of 480p. The device supports up to two simultaneous AV streams from USB-C inputs and offers multi-view layouts for up to four inputs. Latency is minimized with a maximum frame latency of 2 frames and switching under 1 second.

Connectivity includes 2 full-featured USB-C inputs, 6 HDMI inputs, mirrored HDMI output, an interchangeable HDBaseT RJ-45 port, multiple USB 3.2 host and device ports, gigabit LAN and management Ethernet, RS-232 and GPIO control. Audio I/O covers analog mic and balanced outputs plus audio embedding and de-embedding. PoE and PD charging are supported on the HDBaseT and USB-C ports respectively.

Typical applications include conference rooms, lecture halls, and hybrid meeting spaces where BYOD and UCC systems coexist. The unit supports hosting of displays and USB devices by either a laptop or a dedicated UCC endpoint and extends signals over twisted-pair copper runs up to 100m. Security features include HTTPS Web-UI, 802.1x authentication, and OWASP-10 penetration protection.

Installation is simplified by a compact 1U 19-inch enclosure, fan ventilation, and an interchangeable HDBaseT port that can act as transmit or receive. Power input accepts 85-240V AC and the unit provides PoE+ and USB-C PD charging where required. The SWT3-81-PR is built for integration and managed operation in enterprise AV deployments.

Product Diagrams

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Specifications

Inputs	2 Full-featured USB-C, 6 HDMI, 1 Analog Mic 6.3mm, 4 Analog Mic or 4 Balanced Mono or 2 Balanced Stereo 3-pin terminal block
Outputs	1 HDMI, 1 Analog Audio Balanced Stereo Line Level 5-pin terminal block
Interchangeable Inputs/Outputs	1 HDBT RJ-45
Ports	1 1000BaseT Ethernet, 1 100BaseT Ethernet, 6 USB 3.2 Host, 3 USB 3.2 Device, 2 RS-232, 2 GPIO
Video Max Bandwidth	18 Gbps
Max Resolution	4K@60Hz 4:4:4 24bpp
Max Channel Resolution for Dual-channel Extension over HDBT	4K@30Hz 4:4:4 24bpp
Content Protection	HDCP 2.3
Compliance	HDMI 2.0b
Video Performance Scaling	Up, down, cross-scaling
Minimum Input Scaled Resolution	480p
Max Output Scaled Resolution	4K@60Hz 4:4:4 24bpp
Max Switching Time	1 sec
Max Frames Latency	2
Multi View Windows Layouts	PiP, PoP, Quad, Stacked, Side-by-side, Split
Max Layout Inputs	4
USB-C AV Compliance	MST DP Alt Mode
Max Input AV Streams	2
USB Compliance	3.2 Gen 2
Max USB 3.2 Data Rate	10 Gbps
Charging Compliance	PD 3.0
Max Charging Power Per Port	60 W
USB Max USB 3.2 Data Rate	10 Gbps
Integrated USB Hubs (layers)	1
Standards Compliance	USB 3.2 GEN 2, 2.0, 1.1
Extension Line Direction	Transmit or receive
Note	On interchangeable HDBT port only
Reach	Up to 100 m (330 ft)
Note	When using Kramer HDBaseT cables
PoE+ Providing	30 W per 802.3at Type 2
Standards Compliance	HDBaseT 3.0
Extended USB Max USB 2.0 Data Rate	480 Mbps
Max Transmitted Data Bandwidth	300 Mbps
Standards Compliance	USB 2.0, 1.1
Extended Ethernet Max Data Rate	1 Gbps
Extended RS-232 Baud Rate	1200 to 115200
Analog Audio Input Impedance	Balanced 20 kOhm, Unbalanced 10 kOhm
Nominal Level	Balanced +4 dBu, Unbalanced -10 dBV
Note	Adjustable via input gain
Max Level	>+21 dBu
Note	At rated THD+N
CMRR	>70 dB typical
Input Gain Adjustment	-20 dB to +10 dB in 0.5 dB steps
Microphone Input Signal Type	Balanced Condenser with phantom, Unbalanced Dynamic
Impedance	Balanced 20 kOhm, Unbalanced 10 kOhm
Nominal Level	-60 dBV
Note	Adjustable via input gain
Max Level	Condenser -18 dBu, Dynamic -36 dBV
Equivalent Input Noise	<-120 dBV (1.0 microVrms)
Note	At +40 dB input gain
CMRR	>70 dB typical
Input Gain Adjustment	-30 dB to +24 dB in 0.5 dB steps
Note	Adjustable per input
DC Phantom Power	+48 VDC
Analog Audio Output Impedance	Balanced 100 Ohm, Unbalanced 50 Ohm
Gain	Balanced 0 dB, Unbalanced -6 dB
Gain Error	+/-0.1 dB
Note	Channel to channel
Max Level	Balanced +21 dBu, Unbalanced +15 dBu
Output Volume Range	-90 dB to +10 dB in 0.5 dB steps
THD + Noise	<0.01% 20 Hz to 20 kHz
Note	At maximum level
Frequency Response	20 Hz to 20 kHz +/-0.1 dB
Dynamic Range	102 dB typical
Note	20 Hz to 20 kHz unweighted
S/N Ratio	>90 dB 20 Hz to 20 kHz
Note	At maximum balanced output unweighted
Crosstalk	<=-90 dB 20 Hz to 20 kHz
Note	Fully loaded
Security Web-UI Communication	HTTPS
User Access	Multiple roles and credentials
IT LAN Authentication	802.1x
Penetration Protection Certification	OWASP-10
Power Source	85-240 V AC
Max Consumption	188 W
Max Power Providing Per HDMI Port	2.5 W (5 V@0.5 A)
Max PoE Providing Power Per HDBT Port	30 W
HDBT PoE Providing Compliance	802.3at Type 2
Max USB-C Charging Power Per USB-C Port	60 W
USB-C Charging Compliance	PD 3.0
Max USB Device Per Port Charging Power	5 W (5 V@1 A)
Environmental Conditions Operating Temperature	0 to +40 C (32 to 104 F)
Storage Temperature	-40 to +70 C (-40 to 158 F)
Humidity	10% to 90% RHL non-condensing
Regulatory Compliance Safety	CE, FCC, UL
Environmental	RoHs, WEEE
Enclosure Size	19" 1U
Type	Aluminum
Cooling	Fan Ventilation
Max Fan Noise	40 dBA
General Net Dimensions (W, D, H)	43.2 cm x 30 cm x 4.35 cm (17" x 11.8" x 1.71")
Shipping Dimensions (W, D, H)	52.5 cm x 33 cm x 10.7 cm (21" x 13" x 4.2")
Net Weight	2.356 kg (2.83 lbs)
Shipping Weight	3.3 kg (7.26 lbs)
Accessories Included	Power cords, 1 multi-signal USB-C cable 1 m
Product Dimensions	19" x 7.20" x 1U (43.6 cm x 18.30 cm x 4.36 cm)
Product Weight	2.9 kg (6.4 lbs) approx
Shipping Dimensions	47.00 cm x 51.80 cm x 15.50 cm (18.50" x 20.39" x 6.10")
Shipping Weight	5.4 kg (11.9 lbs) approx

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Kramer SWT3-81-PR HDBaseT 3.0 Interchangeable 8×1 switcher USB-C / HDMI 4K60 4:4:4 Dual-Display