La nature humaine est ainsi faite que nous investissons beaucoup de nous même dans le choix de notre transceiver. Il est à notre image, nous nous identifions à lui et par la force des choses, on le pense parfait... Heureusement derrière les belles façades bigarrées la technique domine et les surprises sont de taille ! Bonne lecture et n'achetez pas n'importe quoi.

Mesure de l'IP3 bande 40 mètres

D'après G3SJX Radcom - RSBG

Le point d'interception n'est plus mesuré à un écart entre F1-F2 constant de 20 kHz mais à trois différents (20, 10 et 3 kHz).
La mesure a été effectuée sur la bande 40 mètres.

Essais menés par Sherwood Engineering

Notes on Receiver Table Legend

One (1) dB blocking (gain compression) test done at 100 kHz to eliminate phase noise interaction.
N.A. = Data not available.
# = Measured with SSB filter.
* = Built-in preamp actuated.
F.L = Filter limited, no measurement was possible due to signal leakage around filter.
t = Readings would have been lower if 2-kHz spacing had been possible.
^ = Measurement was phase-noise limited rather than intermodulation limited.

  Essais menés par le labo de l'ARRL

          Summary of Data from QST Reviews of Amateur HF Transceivers   Version 4    16 Dec 1992

	QST   		Xmtr	     		Rcvr
Rig	Review	Harm.	Spurs	IMD 	Min Sig	BlkRng	IMD DR	3rdO Icpt	
	Issue 	dBpep	dBpep	dBpep	dBm	dB	dB	dBm
------------------------------------------------------------------------------------------------------------------------------------------------------
Yaesu:
FT-ONE	08/83	-53	-65	-38	-133	N.L.	N.L.	N.L.
FT-77	11/83	 - 	-54	-35	-139.5	99	92	-1.5
FT-101E	09/76			-34	-141	108	81
FT-101Z	12/79 	-45		-38	-139	112	78	-22
FT-102	10/83 	-44		-40	-127	N.L.	96.5	+18
FT-107	04/81		-47	-32	-133	N.L.	82
FT-301	10/77	-55	-68	-40	-133	100	75
FT-707	06/81	-60	-49	-34	-126	N.L.	76	-12
FT-747	08/89	-54	-60	-32	-136	109.5	90	-1
FT-757	12/84		-58	-33	-137	N.L.	89	-5
FT-767	09/87	-62	-56	-40	-131	115	85	
FT-901	11/78	-46	-57	-38	-137	114	85
FT-980	11/84	-56		-37	-137	N.L.	N.L.	N.L.
FT-890	09/92	-50	-50	-30	-137	127	92	+1
FT-1000	03/91	-60	-45	-36	-136	137	94	+5

Icom:
IC-701	04/79	-45	-60		-133	120	87
IC-720	08/82	-58	-63	-28	-132	N.L.	92	+13.5
IC-725	03/90	-56	-56	-35	-137.5	N.L.	90.5	-2
IC-730	11/82	-50	-60	-40	-140	N.L.	96	+4.0
IC-735	01/86	-65	-65	-33	-133	N.L.	88	-1
IC-740	09/83	-57	-63	-30	-141	125	94	-0.5 
IC-745	09/85	-65	-65	-35	-140	115	92	-3
IC-751	01/85	-60	-60	-33	-138	N.L.	91	-5.5
IC-765	12/90	-64	-64	-40	-142	146	96	+2
IC-761	09/88	-56	-65	-37	-139	122	95	2.5
IC-781	01/90	-63	-63	-37	-140	132.5	97	4.5

Ten-Tec:
ArgntII	01/92	-53	-53	-30	-135	109	82	-16
Argosy	10/82	-48	-54	-31	-133	98	64
Centy22	05/85	-54	-46		-128	109	81	-6.5
Corsar2	08/87	-60	-45	-29	-124	117	80	-4
DeltaII	01/92	-52	-47	-33	-129	104	88	-0.5
Omni D	01/80 	-65	-48	-30	-128	115	90	-4
Omni V	11/90	-62	-48	-33	-135	135	95	6.5
Paragon	05/88	-56	-61	-33	-137	136	101	12.75

Collins:
KWM-830	10/82	-59	-60	-34	-131	N.L.	N.L.	N.L.

Cubic:
Ast 102	12/81	-50	-49	-28	-125	N.L.	84	-3

Drake:
TR7/DR7	05/79	-46	-52	-33	-133	120	84	

Swan:
Astr150	7/80	-44	-55	-29	-127	114	84	-1

Heathkit:
HW-9	07/85 	-42	-42		-128	122	88	4
HW-104	12/76			-40	-125	94	71
HW-5400	10/84	-48	-56	-30	-133	110	82	-12.0
SB-1400	10/89	-53	-56	-30	-135.5	112.5	91	+1
SS-9000	02/84	-55	-60	-29	-138	118	88	-4.5

Kenwood:
TS-120S	02/80 	-60	-49	-36	-139	108	75	-26.5
TS-130	07/81	-55	-45	-38	-138	109	78	-19.5
TS-140	06/88	-46		-30	-137	114	91	-0.5
TS-180S	05/80	-50	-70	-38	-139	112	82	-14.5
TS-430	03/84		-51	-31	-137	N.L.	90	-2.75
TS-440	12/86	-65	-43	-28	-139	111	89	-6.5
TS-450S	04/92	-50	-50	-35	-138	108 	70 	-35 	(Note 3)
TS-520	05/78				-133	104	69
TS-530	03/82	-42	-68	-28	-135	112	88
TS-680	10/88	-45	-65	-32	-139.5	106.5	92	-1.5
TS-690S	04/92   -50     -50     -35     -138    108     70      -35     (Note 3)
TS-820	09/76	-45		-39	-136	114	85
TS-830	05/81	-45	-62	-32	-136	129	82	-13
TS-850S	07/91	-64	-64	-28	-141	138	108	+15.5
TS-930	01/84	-50	-50	-35	-139	N.L.	86.5	-7.8
TS-940	02/86	-54	-65	-37	-139	138	93	-0.5
TS-950	01/91	-55	-55	-42	-142	138	99	+5.5
TS950SDX12/92		<-40	-35	-137	131.5	93	+0.5

Japan Radio
JST-135	03/92	-63	-63	-30	-128	117	91	+4.5

                    Test Results of some older transcievers
                        (by Sherwood Engineering)
Drake:
TR-4c					-124	105	74

Atlas:
350-XL					-131	117	81
210/215X				-120	123	76

Heathkit:
SB-104					-123	 92	79

Ten-Tec:
Omni-B					-136	129	87
Corsair					-131	130	93


N.L. = Noise Limited
dBpep = dB below PEP output power.

Notes:
  1) When receiver values were given for preamp on/off, the preamp on numbers were used here. (or IPO/AIP off)

  2) When values for more than one HF Amateur band are given, the worst numbers were used.  (example:  general coverage receiver numbers
for 1.0 MHz were not considered, if a rig covers 50MHz, those numbers were not considered.)

  3) Dynamic Range and 3rd order intercept numbers for the TS-450S and TS-690S do not indicate performance as bad as such numbers would
usually warrant.  Although 3rd order products appeared at the MDS level at a fairly low level, they did not increase in amplitude with
rising input signal level as rapidly as one would normally expect. See the QST review for more details.


References:

  "Using QSTs to Choose an Old HF Rig", QST, Feb 1987.  Includes a table  similar to the one above.

  "The Product Review Process", QST, Dec 1985. Describes the tests that generate the numbers in the table, and how to interpret them.

Et voici maintenant les performances comparées des derniers produits, toujours testés par l'ARRL

ARRL Lab RX Test Data

XX/YY =  (preamp-off) / (preamp-on); 14Mhz operation (except phase noise), 500 Hz CW filter, AGC off, High Ip mode.

Les valeurs portées en rouge indiquent des résultats inférieurs à la moyenne des récepteurs listés ci-dessus

MDS = Minimum Discernible Signal (3db increase above noise floor). Larger negative numbers are generally better, 
but too much sensitivity can reduce strong signal dynamic range and Ip3. Pre-Amp On MDS numbers of -130 dBm 
or more are more than adequate for most HF band operating, since band noise is typically above this number. 
(Lower frequencies need less MDS (more +number) due to an increase in atmospheric noise.)

IMDDR3 = 2 tone (20 kHz spacing) 3rd order Two tone IMD Dynamic Range. This test shows how the RX performs 
in the presence of multiple strong nearby signals in relation to its sensitivity (MDS). Higher is better. Pre-Amp Off 
 IMDDR3 numbers of +95dBm or more are considered excellent.

Ip3 = 2 tone (20 kHz spacing) 3rd order Intercept Point. This test also shows how the RX performs in the presence 
of multiple strong nearby signals. Higher is better. Pre-Amp OFF IP3 numbers of +15dBm are good, and +20dBm or
 more is excellent. Note: Low RX sensitivity can also artificially increase the measured Ip3.

Ip2 = 2 tone (8.020MHz, 6.000MHz) 2nd order Intercept Point This test shows how the RX performs in the presence
 of multiple strong out of band signals (such as broadcast signals on 6Mhz and 8Mhz creating birdies at 14Mhz).
 Higher is better. A Pre-Amp OFF IP2 of +55dBm is OK, and +70dBm or more is considered excellent.

BDR = Blocking Dynamic Range  (20 kHz spacing). This test shows when the receiver's sensitivity begins to drop
 in the presence of strong near by signals. (Desense). A Pre-Amp OFF BDR (20 kHz signal spacing) of greater than 
120dBm is good. Greater than 130dBm is considered excellent. BDR decreases as the interfering signal spacing from
 the receiver's listening frequency is reduced.

Phase Noise = value read from ARRL test graph at  +10 kHz from the carrier. Numbers are for the worst case band.
 Larger negative numbers are better. Bad phase noise contributes to poor RX Blocking Dynamic Range
 (desense from nearby signals.) Good values are  -120 dBc or better at +10 kHz. See the actual ARRL phase noise plots 
in each review for details of other spurious phase noise components.