Sherwood Engineering HF Test Results
Model IC-7300 Serial # 02001408 Test Date: 4/5/2016
IF BW 2400 –6 / -60, Hz 2344 / 3469 Ultimate 85 dB
IF BW 500 –6 /-60, Hz 515 / 666 Ultimate 85 dB
Front End Selectivity (A – F) 15 bandpass filters B
Dynamic Range with radio, no preamp
Dynamic Range 20 kHz 81 dB
Dynamic Range 10 kHz 81 dB
Dynamic Range 5 kHz 81 dB
Dynamic Range 2 kHz 81 dB
Dynamic Range of radio with IP+ dynamic-range enhancement enabled
Dynamic Range 20 kHz 103 dB
Dynamic Range 10 kHz 101 dB
Dynamic Range 5 kHz 95 dB
Dynamic Range 2 kHz 94 dB
Blocking above noise floor, 1uV signal @ 100 kHz, AGC On, 123 dB
See notes below on blocking, limited by ADC clip point.
Phase noise (normalized) at 2.5 kHz spacing: -127 dBc
Phase noise (normalized) at 5 kHz spacing: -132 dBc
Phase noise (normalized) at 10 kHz spacing: -137 dBc
Phase noise (normalized) at 20 kHz spacing: -140 dBc
Phase noise (normalized) at 30 kHz spacing: -144 dBc
Phase noise (normalized) at 40 kHz spacing: -145 dBc
Phase noise (normalized) at 50 kHz spacing: -147 dBc
Phase noise (normalized) at 80 kHz spacing: -144 dBc
Phase noise (normalized) at 100 kHz spacing: -140 dBc
Phase noise (normalized) at 200 kHz spacing: -149 dBc
Phase noise (normalized) at 300 kHz spacing: -149 dBc
Phase noise (normalized) at 400 kHz spacing: -149 dBc
Phase noise (normalized) at 500 kHz spacing: -149 dBc
Noise floor, SSB bandwidth 14 MHz, IP+ enabled -116 dBm
Noise floor, SSB bandwidth 14 MHz, no preamp -128 dBm
Noise floor, SSB bandwidth 14 MHz, Preamp 1 On -136 dBm
Noise floor, SSB bandwidth 14 MHz, Preamp 2 On -137 dBm
Sensitivity SSB at 14 Mhz, IP+ enabled 1.0 uV
Sensitivity SSB at 14 MHz, no preamp 0.27 uV
Sensitivity SSB at 14 MHz, Preamp 1 On 0.11 uV
Sensitivity SSB at 14 MHz, Preamp 2 On 0.10 uV
Noise floor, 500 Hz, 14.2 MHz, IP+ enabled -122 dB,
Noise floor, 500 Hz, 14.2 MHz, no preamp -133 dBm
Noise floor, 500 Hz, 14.2 MHz, Preamp 1 On -141 dBm
Noise floor, 500 Hz, 14.2 MHz, Preamp 2 On -142 dBm
Noise floor, SSB, 50.125 MHz, no preamp -125 dBm
Noise floor, SSB, 50.125 MHz, Preamp 1 -134 dBm
Noise floor, SSB, 50.125 MHz, Preamp 2 -135 dBm
Sensitivity, SSB, 50.125 MHz, no preamp 0.37 uV
Sensitivity, SSB, 50.125 MHz, Preamp 1 0.13 uV
Sensitivity, SSB, 50.125 MHz, Preamp 2 0.113 uV
Noise floor, 500 Hz, 50.125 MHz, no preamp -131 dBm
Noise floor, 500 Hz, 50.125 MHz, Preamp 1 On -139 dBm
Noise floor, 500 Hz, 50.125 MHz, Preamp 2 On -140 dBm
Signal for S9, no preamp -73 dBm 50 uV
Signal for S9, Preamp 1 -80 dBm 22 uV
Signal for S9, Preamp 2 -85 dBm 12 uV
Gain of preamp(s)
Preamp 1 7 dB
Preamp 2 11 dB
AGC threshold at 3 dB, no preamp 1.9 uV
AGC threshold at 3 dB, Preamp 1 On 0.85 uV
AGC threshold at 3 dB, Preamp 2 On 0.5 uV
Notes:
Blocking measurement was limited by the ADC overload indicator “OVF”
Overload with a single signal occurs at -10 dBm
While dynamic range is increased significantly with IP+ enabled, the overload
point remains -10 dBm.
S meter linearity
S1 - S5: 2.8 dB / S unit
S5 - S9: 3.3 dB / S unit
From S9 to S9+60, each 10 dB reading was actually +9.5 dB
Rev A
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