The PXI-1440 IF Downconverter Module is a PXI 3U, 1-slot module that facilitates additional frequency translations to lower intermediate frequencies (IF) when high-dynamic range digitization is required. The module can receive multiple IF inputs from two different downconverter modules. The IF-input signals can either be bypassed and sent out in wideband mode or filtered and further down converted before being up routed to the appropriate alias filter for additional processing in the narrowband mode. The two input sources to this module are normally the IF signals from the RF Downconverter Module (PXI-1430B) or from the MW Downconverter Module (PXI-1420). Additionally, the PXI-1440 contains video-processing circuitry to enable video demodulation or IF video triggering implementation in a PXI downconverter system. Features and controls include: incoming signal routing, anti-alias filter routing, IF output routing, LO level indicator, and several signal-path options for testing.

The PXI-1440 IF Downconverter Module is intended for use in applications such as intrumentation, microwave receivers, signal intelligence, or anywhere a microwave signal needs to be down converted to a baseband frequency for data capture, analysis, and measurement.

Description Specification
IF Input Range 100 kHz to 425 MHz
IF Output Range 100 Hz to 425 MHz
IF Aux. Output 30 kHz / 8 MHz BW (user switchable, centered @ 21.4 MHz)




Operation Manual

Letter of Volatility


Ordering Information

As of January 2021, all purchase orders for Phase Matrix products must reference NI part numbers and must be submitted to NI Corp or its distribution partners. Please contact your local NI office for purchasing instructions and options.

Model PXI-1440 IF Downconverter
Options None 
Accessories None
Related Products PXI-1410, PXI-1420, PXI-1430B, PXI-1450B


The NI and PMI part numbers listed below are for the same product. No changes were made to the products.


NI Part Number 781784-01 PMI 1440 IF DOWNCONVERTER

Servicing Information►


Servicing Information

When requiring service for your PMI product through NI, please reference your serial number and the following module part number:

NI Module Part Number Description


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Phase Matrix warrants its products to be free from defects in material and workmanship for one year from the date of delivery. Damage due to accident, abuse, or improper signal level is not covered by the warranty. Removal, defacement, or alteration of any serial number, inspection label, marking or seal may void the warranty. Phase Matrix will repair or replace, at its option, any components of this product that prove to be defective during the warranty period provided that the entire unit is returned freight prepaid to Phase Matrix, Inc. or an authorized service facility. In-warranty units will be returned freight prepaid; out-of-warranty units will be returned freight COLLECT. No warranty other than the above is expressed or implied.