The National Instruments 778737-01, also known as the PXI-5610, is a sophisticated PXI RF signal upconverter engineered for efficient frequency translation of intermediate frequency (IF) input signals to the desired radio frequency (RF). Designed for seamless integration with modular function generators in RF applications, the 778737-01 boasts a substantial real-time bandwidth and exceptional timebase stability. Central to its performance is the internal frequency reference, operating at 10 MHz with a maximum temperature stability of ±20 parts per billion (ppb), and minimal aging characteristics that yield an annual variance of ±100 ppb and a daily variance of ±1 ppb after 72 hours. The upconverter achieves a maximum accuracy of ±50 ppb and is equipped with automatic locking abilities, featuring a maximum lock period of 5 seconds and a locking range of ±0.5 parts per million (ppm) to an external reference. The 10 MHz reference output delivers a signal of 1±0.1 Vpk-pk (6.7 dBm into a 50 Ω load).

The device supports an extended power output range of -145 dBm to +10 dBm with a typical amplitude resolution of 1 dB and a rapid amplitude settling time, typically reaching 0.1 dB within 5 milliseconds. It maintains a group delay deviation of approximately ±20 nanoseconds within the vector modulation bandwidth, complemented by a bandwidth flatness of ±0.5 dB. The upconverter module’s group delay averages around 1,200 nanoseconds. Enhanced with overload protection, the 778737-01 tolerates a maximum reverse RF power of 4 watts and accommodates a DC input of ±50 VDC. Its Local Oscillator (LO) output operates within the frequency range of 3.2 GHz to 5.9 GHz, delivering a typical power output of -22 dBm and achieving a maximum Voltage Standing Wave Ratio (VSWR) of 1.5:1. The 778737-01 RF signal upconverter is widely utilized in various sectors, including signal intelligence, telecommunications, and radar systems, making it a versatile tool for advanced RF applications.