Extron SMP 352

SMP 352 Series


Number/signal type

3 HDMI digital video (HDCP compliant), 1 component video (Y, R-Y, B-Y; interlaced, progressive, HD), or composite video

Optional: 1 SDI, HD-SDI, or 3G-SDI digital component video


4 female HDMI type A, 3 inputs and 1 loop-through

3 female BNC; component video, composite video

Optional: 1 female BNC: 3G-SDI, HD-SDI, SDI

Nominal level

1 Vp-p for Y of component video and for composite video

0.7 Vp-p for RGB and for R-Y and B-Y of component video

0.8 Vp-p for 3G-SDI

Minimum/maximum level

Analog: 0.0 V to 1.0 Vp-p with no offset


75 ohms

Horizontal frequency

15 kHz to 100 kHz

Vertical frequency

24 Hz to 75 Hz

Resolution range

640x480 to 1920x1200 (reduced blanking), 480p, 480i, 576p, 720p, 1080i, 1080p, NTSC, and PAL, sampled pixel for pixel

Return loss (input 3)

<-30 dB @ 5 MHz (input 3)

Return loss (Input 5, 3G-SDI)

>15 dB @ 5 MHz to 1.5 GHz

>10 dB @ >1.5 GHz to 2.97 GHz

DC offset (max. allowable)

0.5 V

Input cable equalization

Automatic for up to -30 dB of cable loss


60 m (200 ft) using Extron RG6 cable

45 m (150 ft) using Extron RG59 cable


120 m (400 ft) using Extron RG6 cable

90 m (300 ft) using Extron RG59 cable


150 m (500 ft) using Extron RG6 cable

120 m (400 ft) using Extron RG59 cable

Video processing

Analog sampling

12 bits per color, 13.5 MHz standard (low resolution video), 165 MHz standard (RGB, YUVp, DVI)

Digital sampling

8-, 10-, or 12-bits per channel

Digital processing

4:2:2, 8-bits per color


H.264/AVC (ITU H.264, ISO/IEC 14496-10) 4:2:0, 8-bit color

Encoding profiles: High, Main, Baseline;

Encoding levels: 4.1, 4.0, 3.2, 3.1, 3.0; configurable GOP

Bit rate

200 kbps to 10 Mbps

Bit rate control

Selectable (variable, constrained, or constant)


130 msec* (encode), 600 msec* (encode/decode)

*Indicates minimum latency. Encoder, decoder, and network dependencies apply.

Video output

Number/signal type

3 H.264/AVC digital video over Ethernet

1 HDMI digital video (HDCP compliant)


1 female RJ-45 (streaming)

1 female HDMI type A

Video output power for active cables

1.1 W max. for the HDMI port

Scaled resolution

Archive/record: 480p, 720p, 1080p, 512x288, 1024x768, 1280x1024, custom

Confidence: 480p, 720p, 1080p, 512x288, 1024x768, 1280x1024, custom

Frame rate

Up to 30 fps for all output rates


H.264/AVC (Profile type: High, Main, Baseline. Profile level: 4.1, 4.0, 3.2, 3.1, 3.0)


Input type

Tri-level or bi-level component video


Input: NTSC 3.58, NTSC 4.43, PAL

SDI (SMPTE 259M-C, 270 Mbps), HD-SDI (SMPTE 292M, 1.485 Gbps),

3G-SDI (SMPTE 424M, 2.97 Gbps)

Input level

0.6 Vp-p for component video tri-level sync

0.3 Vp-p for component video bi-level sync

Maximum level

5 Vp-p

Input impedance

75 ohms

Recording and storage

File system for USB storage

FAT32, NTFS, VFAT long file name extensions, EXT2, EXT3, EXT4

File types

H.264 and AAC in an MP4 container, JPEG, JSON, XML

File transfer protocols


Network file share protocols



Same as primary streamed resolution: 480p, 720p, 1080p, 512x288, 1024x768, 1280x1024, custom

Recording frame rate support

Same as primary streamed frame rate, up to 30 fps for all output rates

Internal storage capacity

480 GB (440 GB for recording files)

External USB ports

1 (front panel), 1 (rear panel), USB 2.0 (Each port current limited to 1.5 A.)

Background image format


Audio input


Number/signal type

Ch A: 1 stereo, balanced or unbalanced, with loop-through

Ch B: 1 stereo, balanced or unbalanced, or 2 mono, unbalanced


(3) 3.5 mm captive screw connectors, 5-pole


Number/signal type

3 stereo, digital de-embedded from HDMI

1 loop-through from HDMI

1 stereo, digital de-embedded from SDI (optional)


4 female HDMI type A


>10k ohms unbalanced, >20k ohms balanced

Nominal level

+4 dBu (1.23 Vrms), -10 dBV (316 mVrms), adjustable via input gain

Maximum level

+18 dBu, (balanced or unbalanced)


>70 dB @ 20 Hz to 20 kHz

Input gain adjustment

-18 dB to +24 dB, 1 dB steps, adjustable per input

Audio system (line input to line output)


-6 dB unbalanced, 0 dB balanced

Frequency response

20 Hz to 20 kHz, +0.5 dB

THD + Noise

<0.03%, 20 Hz to 20 kHz at maximum output


>90 dB, at maximum balanced output (unweighted)

Stereo channel separation

>90 dB @ 1 kHz


< -103 dB, at 20 Hz to 20 kHz, full loaded


+12 dB to -24 dB @ 100 Hz


+12 dB to -24 dB @ 8kHz

Audio processing

Sampling rate

16 bit, 48 kHz or 44.1 kHz sampling


AAC-LC MPEG-4 (ISO/IEC 14496-3:2005)

Bit rate

80 kbps to 320 kbps, stereo

Audio output — analog

Number/signal type

1 stereo, balanced/unbalanced


(1) 3.5 mm captive screw connector, 5 pole


50 ohms unbalanced, 100 ohms balanced

Maximum level (Hi-Z)

>+18 dBu balanced, +12 dBu unbalanced

Gain error

+0.1 dB channel to channel

Audio output — digital

Number/signal type

1 stereo, HDMI (re-embedded local preview)

1 AAC-LC digital audio over Ethernet


1 female HDMI type A

1 female RJ-45

Digital I/O control

Number/signal type

4 digital input/output (configurable)


(1) 3.5 mm captive screw connector, 5-pole

Digital inputs

Input voltage range

0 to 24 VDC, clamped at +30 VDC

Input impedance

29k ohms

Programmable pullup

1k ohms to +5 VDC

Threshold low to high

2.8 VDC

Threshold high to low

2.0 VDC

Digital outputs

250 mA sink from 24 VDC maximum

Pin configurations

1, 2, 3, 4 = digital I/O numbers 1, 2, 3, 4. 5 = Gnd



USB configuration ports

1 front panel female mini USB B

Mouse and keyboard port

2 rear panel USB type A

USB standards

USB 1.1, USB 2.0, high/full/low speed hosts

Serial control

Serial control port

1 bidirectional RS-232, rear panel 3.5 mm captive screw connector, 3-pole

Host control

Host control (Extron SIS), bidirectional


Data bits: 7 or 8 (default)

Stop bits: 1 (default) or 2

Parity: odd, even, or no (default)

Flow control: no flow control (default)

Baud rates

9600 (default), 19200, 38400, 57600, 115200

Serial control pin configurations

1 = Tx, 2 = Rx, 3 = Gnd


Ethernet host port

1 female RJ-45

Ethernet data rate

10/100/1000Base-T, half/full duplex with autodetect

Maximum Transmission Unit

68 - 1500 MTU, adjustable



Pull: RTP/RTCP (RFC 3550), RTSP (RFC 2326), Interleaved RTSP (RTP/RTSP), RTP/RTSP tunneled through HTTP unicast or multicast

Push: MPEG2-TS/UDP* (ISO/IEC 13818-1), MPEG2-TS/RTP* (RFC 2250, IPTV‑ID-0087, ETSI TS 102 034), Direct RTP (RFC 3984), SAP (RFC2974), SDP (RFC4566), unicast or multicast, RTMP


TCP, UDP, multicast IGMPv3 (RFC 3376) or unicast

All supported

IGMPv3 (RFC 3376), IP, UDP, SSL, DHCP, HTTP, HTTPS, RTMP, RTMPS, RTP, RTSP, SNMP V2 (RFC 1213), SAP (RFC 2974), SDP (RFC 4566), QoS (RFC 2474), NTPv4 (RFC 4330)

Ethernet default settings

IP address =

Subnet mask =

Default gateway =

DHCP = off

Program control

Extron Simple Instruction Set™ (SIS™) Extron DataViewer, Microsoft® Internet Explorer®*, Microsoft Edge™*, Apple® Safari®*, Mozilla® Firefox®, Google® Chrome™

(*Certain browser dependencies may apply.)


Power supply


Input: 100-240 VAC, 50-60 Hz

Power consumption

30 watts typical


Storage: -40 to +158 °F (-40 to +70 °C) / 10% to 90%, noncondensing

Operating: +32 to +122 °F (0 to +50 °C) / 10% to 90%, noncondensing


Fans, air flow left to right

Thermal dissipation

96 BTU/hr


Rack mount

Yes, with pre-installed brackets

Enclosure type


Enclosure dimensions

1.7" H x 17.5" W x 11.5" D (1U high, full rack wide)

(43 mm H x 444 mm W x 292 mm D)

(Depth excludes connectors.)

Product weight

6.0 lbs (2.7 kg)

Regulatory compliance

CE, C-Tick, c-UL, FCC Class A, ICES, UL, VCCI

Product warranty

3 years parts and labor

Everlast power supply warranty

7 years parts and labor


Appropriate HDMI to DVI-D cables or adapters are required for DVI signal output.


0 dBu = 0.775 Vrms, 0 dBV = 1 Vrms, 0 dBV ≈ 2 dBu


*Indicates that portions of the RFC and other standards may apply.


CE and FCC testing is conducted with STP (shielded, twisted pair) cable.


All nominal levels are at ±10%.


Specifications are subject to change without notice.






Ritalankatu 31

33400 Tampere

© Coaxial  OY 2020