FSM Receiver Tests
Note the Effective Noise Bandwidth (wrt gain at 1kHz) can be quite a deal less than obtained by eyeballing the -6dB
points. Further, the passband of receivers often exhibits a considerable downward slope with frequency across the
passband. Attempts to guestimate the Effective Noise Bandwidth are likely to be in error by up to a couple of dB, see
the article Measuring receiver bandwidth.
Table 1: Receiver tests at 7MHz
| Model |
Lower 6dB point (Hz) |
Upper 6dB point (Hz) |
Effective Noise Bandwidth (Hz)
|
Rx Noise Figure (dB) |
Test date
|
ID
|
Comment |
| IC7000 |
216 |
2748 |
2090 |
17.4 |
30/06/06 |
VK1OD |
Pre-amp OFF, Filter 300/2400 sharp, AGC 30dB. |
| IC7000 |
216 |
2748 |
2090 |
6.5 |
30/06/06 |
VK1OD |
Pre-amp ON, Filter 300/2400 sharp, AGC 29dB. |
| IC706IIG |
339 |
2213 |
1875 |
6.25 |
20/02/05 |
VK1OD #1 |
Pre-amp ON. |
| IC706IIG |
339 |
2213 |
1875 |
10.00 |
10/06/05 |
VK1OD #1 |
Pre-amp OFF. |
| IC706IIG |
296 |
2277 |
2003 |
6.11 |
20/02/05 |
VK1OD #2 |
Pre-amp ON. |
| IC706IIG |
296 |
2277 |
2003 |
9.61 |
10/06/05 |
VK1OD #2 |
Pre-amp OFF. |
| R5000 |
263 |
2664 |
1980 |
15.60 |
20/02/05 |
VK1OD |
|
| TS2000 |
300 |
1900 |
1450 |
16.30 |
03/07/05 |
VK1OD |
Pre-amp OFF, Filter 300/2400, wider filter settings have noticeable slope. (AGC threshold is about 14dB
with pre-amp ON, about 21dB with pre-amp OFF. |
| IC7400 (IC746PRO) |
296 |
2567 |
1698 |
5.58 |
20/02/05 |
VK1OD |
Pre-amp ON, Filter 2400 soft, wider filter not as flat. |
| IC7400 (IC746PRO) |
240 |
2740 |
2149 |
4.55 |
20/02/05 |
VK1OD |
Pre-amp ON, Filter 2400 sharp, wider filter not as flat. |
| IC756PROII |
294 |
2715 |
2254 |
14.4 |
10/12/05 |
VK1OD |
Pre-amp OFF, Filter 2400 sharp, slight slope, AGC Threshold 25dB. |
| IC756PROII |
294 |
2715 |
2254 |
5.0 |
10/12/05 |
VK1OD |
Pre-amp ON, Filter 2400 sharp, slight slope. |
| ICR20 |
300 |
2500 |
1580 |
5.59 |
20/02/05 |
VK1OD |
Poor IF filter shape factor, slope across pass-band. |
| FT920 |
340 |
2700 |
2100 |
7.65 |
01/10/05 |
VK2AAB |
Slope across pass band. |
| FT7 |
473 |
2626 |
2153 |
12.6 |
16/12/05 |
VK7TW |
|
| R1000 |
|
|
1780 |
7.0 |
06/03/07 |
VK1GH |
14MHz |
| DX-70 |
615 |
2130 |
1265 |
17.1 |
17/11/2006 |
VK2DKN |
Filter narrow LSB, no preamp, no att. |
| IC-910 |
270 |
2612 |
1971 |
4.9 |
18/10/2008 |
VK7MO |
NF based on specification sensitivity. |
| IC-7410 |
270 |
2754 |
2038 |
14.2 |
10/03/2014 |
VK2OMD |
Pre-amp OFF, Filter 2400 soft. |
| IC-7300 |
369 |
2624 |
2088 |
|
25/08/2017 |
VK2OMD |
Pre-amp OFF, Filter 2400 soft. |
|