NI PXIE-1491 is an NI HDMI analyzer module for PXI Express systems, designed for HDMI 1.4b video and audio analysis with dedicated analyzer and monitor interfaces.
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Key product information and technical features.
NI PXIE-1491 is a 3U, one-slot PXI Express HDMI analyzer module from National Instruments. NI’s official specifications describe it as a high-definition multimedia interface analyzer, distinguishing it from general-purpose DAQ hardware. The module supports HDMI 1.4b analysis and integrates HDMI input functions for video, audio, CEC, ARC, HEC, and HPD, making it suitable for HDMI signal validation and measurement workflows. Source: https://download.ni.com/support/manuals/375837b.pdf
The analyzer supports TMDS clock rates from 25 MHz to 225 MHz and video clock rates from 25 MHz to 165 MHz. NI specifies maximum supported formats including 1080p at 60 Hz for HDTV, 1080p at 30 Hz for 3D HDTV, and 1600 × 1200 at 60 Hz UXGA graphics. Color depth is specified from 8 bits to 12 bits per color channel, with RGB 4:4:4 and YCbCr 4:4:4 or 4:2:2 chroma formats supported. Source: https://download.ni.com/support/manuals/375837b.pdf
For audio-related analysis, the PXIe-1491 supports 8-channel LPCM or encoded audio with sample rates from 32 kHz to 192 kHz. ARC support is specified for 2 channels with sample rates of 32, 44.1, and 48 kHz, and NI lists typical ARC sample-rate accuracy as 35 ppm. The monitor output operates as a repeater from HDMI IN and supports video and audio functions. Front-panel connectivity includes HDMI IN, MONITOR OUT, and an RJ-45 HEC/LAN connector that provides 100BASE-T access to HEC from the HDMI IN path and does not serve as an end-point adapter. Source: https://download.ni.com/support/manuals/375837b.pdf
Verified product specifications.
| Bus / form factor | 3U, one-slot PXI Express module |
|---|---|
| Dimensions | 21.6 × 2.0 × 13.0 cm |
| Weight | 208 g |
| HDMI version | 1.4b |
| TMDS clock rate | 25 to 225 MHz |
| Video clock rate | 25 to 165 MHz |
| Maximum HDTV resolution | 1080p at 60 Hz |
| Maximum 3D HDTV resolution | 1080p at 30 Hz |
| Maximum UXGA graphics resolution | 1600 × 1200 at 60 Hz |
| Color depth | 8 to 12 bits per color channel |
| Chroma formats | RGB 4:4:4; YCbCr 4:4:4 or 4:2:2 |
| Audio support | 8-channel LPCM or encoded audio |
| Audio sample rate | 32 to 192 kHz |
| ARC support | 2 channels |
| ARC sample rates | 32 / 44.1 / 48 kHz |
| ARC sample-rate accuracy, typical | 35 ppm |
| HEC nominal data rate | 100 Mbps |
| Front-panel connectors | HDMI IN (Type A), MONITOR OUT (Type A), HEC/LAN (RJ-45) |
| Power requirements | +3.3 VDC 2.3 A; +12 VDC 2.4 A; total power 30 W |
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Manufacturer
Platform
HDMI analyzer
HDMI 1.4b
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Product-specific answers based on available technical information.
NI identifies the PXIe-1491 as a high-definition multimedia interface (HDMI) analyzer and specifies it as a 3U, one-slot PXI Express module.
Yes. NI specifies HDMI 1.4b support, with HDMI input functions including video, audio, CEC, ARC, HEC, and HPD.
NI lists support through NI Picture Quality Analysis 1.5 or later, NI Video Measurement Suite 3.2 or later, or NI AudioMASTER 6.3 or later.
No. NI documentation identifies the PXIe-1491 as the PXI Express module, while the NI CB-2180/2181 Digital Audio Accessory is listed separately as an optional accessory.