Model SC2250
18 GHz Frequency Extension and Signal Conditioning Module
Typical Applications
- Harmonic level measurements to 18 GHz in production test
- Intermediate Frequency Interface for 5G Research and Development
- 802.11ax (U-NII-5 5925-6425 MHz, U-NII-6 6425-6525 MHz, U-NII-7 6525-6875 MHz, U-NII-8 6875-7125 MHz) testing on legacy 6 GHz Instruments
Both up- and down-conversion functions are housed in a single-slot PXIe module. An independent local oscillator (LO) is available for each block. Optional LO input ports are provided to support measurements requiring extremely low phase noise performance.
The down-converter includes a bypass path to minimize cable swapping when the mixer is not required. The bypass path includes a user-selectable filter bank and low noise amplifier for signal conditioning purposes. For harmonic measurement applications, a bank of high pass filters (HPF) is available to reject the fundamental signal and provide better dynamic range. The down-converted signal is passed through 5GHz intermediate frequency (IF) filter for spurious rejection prior to output from the module.
Like its counterpart, the up-conversion path includes bypass capability and several signal conditioning options. Self calibration of the instrument is possible using the built-in loop back signal in the up-converter.
- General purpose Up/Down Conversion functions
- Single-Slot 3U PXIe Module
- Operating Conditions: 15 to 45 C
Rx Down-Conversion Path
- Input Frequency: 6 – 18 GHz
- Output center frequency: 5.1 GHz
- Maximum Input Power: +20 dBm
- Maximum Harmonic Input Power: -25 dBc
- Instrument Generated Harmonic Distortion (@20 dBm):
- 2nd: -80 dBc
- 3rd: -75 dBc
- IF Filter Bandwidth: 200 or 1500 MHz
- Calibrated Amplitude Accuracy: 1 dB
- Noise Figure @6 GHz:
- 11 dB with Pre-Amplifier
- 25 dB without Pre-Amplifier
- Noise Figure @18 GHz:
- 21 dB with Pre-Amplifier
- 36 dB without Pre-Amplifier
- Gain (@6 GHz):
- 5 dB with Pre-Amplifier
- -11 dB without Pre-Amplifier
- Gain (@18 GHz):
- 17 dB with Pre-Amplifier
- -0 dB without Pre-Amplifier
Receive Mixer Bypass Path
Allows instrument to remain in the signal path and provides some optional signal conditioning for frequencies less than 6 GHz.
Transmit Up-Conversion Path
Allows signals to be conditioned and optionally mixed up to a higher frequency.
- Input Frequency range: 400 MHz – 6 GHz
- Output Frequency range: 6 – 18 GHz
- Maximum Output Power (rms): 10 dBm max
- Fundamental Rejection: 30 dB min
- Calibrated Amplitude Accuracy: 1 dB
- Gain (@6 GHz): 4 dB
- Gain (@18 GHz): -8 dB
Transmit Bypass Path
Conditions VST signals by filtering out unwanted harmonic and spurious content.
- Frequency Range: 10 MHz – 6 GHz
- Insertion Loss : 10 dB max
- Rejection : 30 dB min
- Frequency Range: 10 MHz – 6 GHz
- Insertion Loss : 10 dB max
Instrument Control
- 32/64 bit IVI Compatible Driver
