RF sources are common building block in today’s connected world. They are available in wide array of frequency ranges, power levels, form-factor and type. In this article we will take a brief look on benchtop RF source, designed to provide clean signal from 10 MHz to 20000 MHz with output levels over +20 dBm. It is lightweight half-rack size instrument with simple encoder control, 16×2 LCD and SMA output connector. There is RF output toggle switch and a power switch.
It features the following performance parameters:
|Frequency range||10 – 20000||MHz|
|Phase Noise||-98 dBc/Hz||10 kHz Offset @ 10 GHz|
|Setting resolution from front panel||10000||Hz|
|Setting resolution from GPIB||1||Hz|
|Power output||-35.0 to +26.0* (depends on Fout)||dBm|
|Aux signals||Trigger in/out, Reference Clock In/Out 10MHz|
|Interfaces||RS232, USB, GPIB|
|Min operational temperature||-10||°C|
|Max operational temperature||+80||°C|
|Power supply||External, +12V 8A rating|
Table 1. HMC-T2220 specifications
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Teardown of HMC-T2220 RF source.
After little tracing for input power connector, RF source was powered up from trusty HP 6653A DC power supply. While sourcing 20 GHz -20 dBm it was consuming around 25W (+12V 2.1A).
EIP 578B counter was used to measure output of the HMC-T2220. To avoid overloading counter input source was limited to -20 dBm power. Counter was also configured to use external 10 MHz reference clock, sourced from RF source as well.
Modified: Jan. 2, 2023, 8:35 a.m.