ALPINE CDA-7842R CAR CD RECEIVER: 1998
Incorporates Digital Signal Processing into its FM section, a feature that the manufacturer called Max Tune PRO. Included on CDA-7878R, CDA-7876R, CDA-7873R, CDA-9812R, CDA-7944R, CDM-7871R, TDA-7592R & INA-N333RS. Max Tune PRO receivers are no longer available.
Utilizes four conventional ceramic filters for FM IF which are fed into the TDA7461 Car Radio Signal Processor Integrated Circuit. Made in Japan.
Radio Data System
|
Supports
EON, PS, Radio Text,
Alternative Frequency,
Traffic Announcement
|
Radio
Broadcast Data System
|
Not
supported
|
Usable
Sensitivity - at 98.1 MHz
|
Mono 17.2 dBf (1.98 µV)
|
| -3dB Limiting Sensitivity - at 98.1 MHz |
21.2 dBf
|
PS RDS Sensitivity (radio
station name)
|
36.2 dBf (25 dBµV)
|
Signal-to-Noise
Ratio - at 98.1 MHz
|
Stereo 55 dB |
| Alternate
Channel selectivity (unmodified) |
90
dB |
Number
of IF Filters - FM
|
4
|
Width
of IF Filters - FM section
|
3 x 180 KHz Group
Delay Type
1 x 80 KHz
|
| Capture
ratio |
2.0
dB |
| Stereo Separation |
20 dB |
Image Rejection - at 106.1 MHz
|
40 dB
|
IF Rejection - at 90.1 MHz
|
60 dB
|
Distortion - at 98.1 MHz
|
0.7% (input: 60 dBµV) |
Channel
Spacing steps - FM
|
Switchable:
50 KHz or 100 KHz
|
Can
manually force mono
|
Not
supported
|
Longwave
tuner - LW band
|
Supported
|
Audio
Power amplification
|
FET
|
Ipod
or auxiliary input
|
Supported
|
Remote
control
|
Supported |
SONY CDX-S2000S CAR CD RECEIVER: 2005 
Incorporates Digital Signal Processing into its FM section, a feature that the manufacturer calls SSIR-EXA adaptive reception. According to Sony, this minimizes interference between stations.
Utilizes two (2) conventional ceramic filters for FM IF which are fed into a proprietary Sony Noise Suppressor IC.
Radio Data System or
Radio Broadcast Data System |
RDS-EON supported on all European models e.g. CDX-S2000 |
| Usable Sensitivity |
9 dBf (0.77 µV) |
| Signal-to-Noise Ratio |
Mono 69 dB
Stereo 67 dB |
| Frequency response |
30-15,000 Hz |
| Alternate Channel Selectivity (400 kHz) |
75 dB |
| IF Filters - FM section |
2 x 180 KHz |
| Harmonic Distortion - at 1 KHz |
Mono 0.3 %
Stereo 0.5% |
| Stereo Separation - at 1 KHz |
35 dB |
| Channel spacing steps - FM section |
Fixed: 50 KHz |
| Can manually force mono for weak FM station |
Supported |
| Longwave tuner - LW band |
Supported on all European models |
| Audio power amplification |
Mosfet |
| Ipod or auxiliary input |
Not supported |
| Remote control |
Supported |
PANASONIC CQ-C1301W CAR RECEIVER: 2006
Incorporates Digital Signal 
Processing into its FM section. Included in all models as a standard feature. Panasonic also manufactured a series of high end car receivers with switchable bandwidth.
Usable sensitivity
|
6 dB/µV (S/N 30 dB)*
My calculations indicate this is equivalent to: 2 µV or 17.2 dBf once converted. |
Frequency response
|
30 Hz – 15,000 Hz (±3 dB)
|
Alternate channel selectivity
|
75 dB
|
Stereo separation - at 1kHz
|
35 dB
|
Image rejection ratio
|
70 dB
|
IF rejection ratio
|
100 dB
|
Signal-to-noise ratio
|
62 dB
|
BLAUPUNKT DIGICEIVER: 1990s 
Incorporates Digital Signal Processing into its FM section, a feature the manufacturer calls the Sharx Digiceiver digital adaptive filter. According to Blaunpunkt, this optimizes channel separation so station signals which are extremely close to one another are separated cleanly. 
Blaupunkt also manufacture Digiceivers for modern day VW/Audi, Mercedes & BMW cars available in Australia (as pictured from the Audi A3). RDS-EON/PTY support. The Digiceiver is the most selective DSP car receiver tested for 100 kHz & 200 kHz signals, relative to the Alpine, Sony, Panasonic, Pioneer & JVC models.
How it works
American DX performance 
German DX performance
Technical review A
Technical review B
American measured specs A
German measured specs B
Comparative test
Component Tuner Specifications
SONY XDR-F1HD TUNER: 2008
A component tuner but more compact, with the same dimensions of a car receiver. Incorporates Digital Signal Processing into its FM section. Basic RDS support.
Technical review
Non recordable desktop receiver version (released in 2010)
Portable Radio Specifications
TECSUN PL-300WT RADIO: 2009
A portable radio that incorporates DSP developed by Silicon Labs into its FM section. Also 'rebadged' as the Grundig G8 in the Americas.
These radios have been used to receive Summer Es FM reception from over 2,300 kilometres away. What more needs to be said?
Adjacent Channel Selectivity
|
Minimum 35 dB
|
Input IP3 (3rd order intercept point) |
Minimum 100 dBµV EMF |
|
Typical 50 dB
|
|
Typical 105 dBµV EMF |
Alternate Channel Selectivity
|
Minimum 60 dB
|
AM Suppression |
Minimum 40 dB |
|
Typical 70 dB
|
|
Typical 50 dB |
Sensitivity with 50 Ohm Network
|
1.1 µV EMF (S+N)/N = 26 dB*
|
Spurious Response Rejection - inband |
35 dB |
Signal
- to - Noise ratio
|
Mono Minimum 55 dB
|
Soft Mute characteristics |
Engages for FM signals with a signal to noise ratio of 4 dB or less. |
|
Mono Typical 63 dB
|
Attenuation during Soft Mute - FM section |
Maximum 16 dB |
|
Stereo 58 dB
|
Coverage |
Extended FM band (64 to 76 MHz) |
| Frequency Response at -3 dB |
30 Hz - 15,000 Hz
|
|
Worldwide FM broadcast band (76 to 108 MHz) |
Stereo Separation
|
25 dB
|
Channel spacing steps - FM section |
10 kHz |
Total Harmonic Distortion
|
Typical 0.1 %
|
|
|
|
Maximum 0.5%
|
|
|
* denotes a non-standard tuner sensitivity measure. These specifications relate to their unmodified FM section performance. Car receiver measurements have been sourced from the service manuals. Portable radio measurements have been sourced from the data sheets.
The Sony CDX-S2000S has been modified slightly. The original FM IF filters have been replaced with narrower 56, 80 or 110 kHz ones. These filter modifications may improve or degrade individual values.
Even though they are designed for "in car use", the car receivers are used inside the house with 12v DC power using Jaycar regulated power supplies.
