ICOM IC-7851 Sherwood Engineering Test Results IC-

Sherwood Engineering HF Test Results

Model Icom IC-7851 Serial # 02001020 Test Date: 3/25/2016 – 3/31/2016

IF BW 2400 –6 / -60, Hz 2350 / 3450 Ultimate 95 dB
IF BW 500 –6 /-60, Hz 500 / 660 Ultimate 100 dB

Front End Selectivity (A – F) Tracking preselector A *
* See Notes below on Digi Select

First IF rejection +/- kHz 100 dB

Dynamic Range with radio, no preamp, 20 meters
Dynamic Range 20 kHz 110 dB
Dynamic Range 10 kHz 109 dB
Dynamic Range 5 kHz 110 dB
Dynamic Range 2 kHz 105 dB
# Combination of phase noise and 3rd order product
* Consisted of phase noise only

Dynamic Range with radio, Preamp 1, 10 meters
Dynamic Range 20 kHz 110 dB
Dynamic Range 2 kHz 103 dB
Dynamic Range 1 kHz 96 dB
# Combination of phase noise and 3rd order product
* Consisted of phase noise only

Dynamic Range with radio, no preamp, 80 meters
Dynamic Range 20 kHz 106 dB
Dynamic Range 10 kHz 106 dB
Dynamic Range 5 kHz 106 dB
Dynamic Range 2 kHz 102 dB
Dynamic Range 1 kHz 96 # dB
# Combination of phase noise and 3rd order product

Dynamic Range with radio, no preamp 40 meters, 20 kHz 107 dB

Dynamic Range with radio, no preamp 160 meters, 20 kHz 106 dB

Blocking above noise floor, 1uV signal @ 100 kHz, AGC On, 149 dB
See comments under Notes.

Digi Sel is a tracking preselector. See Notes below.

Data column 1: 10 MHz HP 10811, data column 2: 14 MHz HP 8642A sources
Phase noise (normalized) at 2.5 kHz spacing: -142 dBc -142 dBc
Phase noise (normalized) at 5 kHz spacing: -145 dBc -145 dBc
Phase noise (normalized) at 10 kHz spacing: -148 dBc -148 dBc
Phase noise (normalized) at 20 kHz spacing: -152 dBc -151 dBc
Phase noise (normalized) at 30 kHz spacing: -153 dBc -152 dBc
Phase noise (normalized) at 40 kHz spacing: -154 dBc -152 dBc
Phase noise (normalized) at 50 kHz spacing: -154 dBc -153 dBc
Phase noise (normalized) at 100 kHz spacing: -154 dBc -154 dBc
Phase noise (normalized) at 200 kHz spacing: -154 dBc dBc
Phase noise (normalized) at 300 kHz spacing: -156 dBc dBc
Phase noise (normalized) at 400 kHz spacing: -156 dBc dBc
Phase noise (normalized) at 500 kHz spacing: -158 dBc dBc

Noise floor, SSB bandwidth 14 MHz, no preamp -120 dBm
Noise floor, SSB bandwidth 14 MHz, Preamp 1 On -132 dBm
Noise floor, SSB bandwidth 14 MHz, Preamp 2 On -136 dBm

Sensitivity SSB at 14 MHz, no preamp 0.65 uV
Sensitivity SSB at 14 MHz, Preamp 1 On 0.16 uV
Sensitivity SSB at 14 MHz, Preamp 2 On 0.11 uV

Noise floor, 500 Hz, 14.2 MHz, no preamp -123 dBm
Noise floor, 500 Hz, 14.2 MHz, Preamp 1 On -135 dBm
Noise floor, 500 Hz, 14.2 MHz, Preamp 2 On -141 dBm

Noise floor, 500 Hz, 28.5 MHz, no preamp -122 dBm
Noise floor, 500 Hz, 28.5 MHz, Preamp 1 On -136 dBm
Noise floor, 500 Hz, 28.5 MHz, Preamp 2 On -139 dBm

Noise floor, 500 Hz, 7.1 MHz, no preamp -122 dBm

Noise floor, 500 Hz, 3.80 MHz, no preamp -122 dBm
Noise floor, 500 Hz, 3.80 MHz, Preamp 1 On -135 dBm
Noise floor, 500 Hz, 3.80 MHz, Preamp 2 On -141 dBm

Noise floor, 500 Hz, 1.815 MHz, no preamp -122 dBm

Noise floor, SSB, 50.125 MHz, no preamp -124 dBm
Noise floor, SSB, 50.125 MHz, Preamp 1 -134 dBm
Noise floor, SSB, 50.125 MHz, Preamp 2 -136 dBm

Sensitivity, SSB, 50.125 MHz, no preamp 0.40 uV
Sensitivity, SSB, 50.125 MHz, Preamp 1 0.13 uV
Sensitivity, SSB, 50.125 MHz, Preamp 2 0.10 uV