Y (II) - Plant Stress Kit (PSK) by Opti Sciences Inc
PSK Meter
Signal Generator, FY6900 Sine 0-50 MHZ 2.4in TFT Screen Digital DDS Waveform Signal Generator Counter Frequency Meter Pulse Source Generators, VCO Burst AM/PM/FM/Ask/FSK/PSK Modulation(US): Amazon.com: Industrial & Scientific
Prostat PSK-310 System Analysis Kit, includes NIST Certificate
PSK31 - Wikipedia
100Mhz Function Signal Generator High Digital Dds Dual-Channel Function Signal/Arbitrary Waveform Generator Pulse Signal Source 300Msa/S Frequency Meter Vco Burst Am/Pm//Ask/Fsk/Psk Modulat - Walmart.com
Software Science
Portable QRP transceiver kit SSB/CW/JT65/PSK/BPSK/FSQ: 20, 40, 80, 160 meter range
PSK Meter
Calculated 7435 AccuMASTER Moisture Meter, 6 to 44% for wood