Realisitic
TRC-476
Documentation Project
CBTricks.com
SPECIFICATIONS
General
Description
|
Transmitter |
Crystal controlled PLL synthesizer, amplitude modulation |
|
Receiver |
Crystal controlled double conversion, superheterodyne system |
|
Communicating frequencies |
40 CB channels (26.965 to 27.405 MHz) |
|
CB Weather radio frequencies |
WX 1:162.400MHz WX 2:162.475MHz WX 3:162.550MHz |
|
Voltage operation |
12-16V DC (negative ground) |
|
Temperature and Humidity range |
-220F~+ 1400F (-300C ~ + 600C) and 10%~ 90% |
|
Transmitter/Receiver switching |
Electrical |
Standard Test Conditions
|
Battery supply voltage |
13.8V DC |
|
Modulation |
1000 Hz, 30% |
|
CB Weather radio modulation |
1 kHz, 3.3kHz Deviation |
|
Receiver output power |
500mW at external SP |
|
Receiver output impedance |
8 ohms, non-inductive |
|
Ant. load impedance of transmitter |
50 ohms, non-inductive |
|
Ambient conditions |
|
|
Temperature |
630F730F (170C230C) |
|
Humidity |
40% - 70% |
Transmitter
|
Description |
Nominal |
Limit |
|
RF power output |
4.0 watts |
3.6-4.4 watts |
|
Antenna spurious emission |
- 70dB |
- 50dB |
|
Modulation capability (positive/negative) |
+90%/-90% |
+80%/-80% |
|
AMC Range at 1 kHz |
40 dB |
30 dB |
|
Frequency accuracy |
0.002% |
0.005% |
|
Spurious radiation & Harmonic |
|
|
|
Signal radiation ratio from fundamental |
- 65dB |
- 60dB |
|
Current consumption |
|
|
|
at no modulation |
1000 mA |
1200 mA |
|
at 80% modulation |
1500 mA |
1700 mA |
|
Envelope distortion |
10% max. 1000 Hz, 50% mod. |
|
|
Stability against variation of antenna impedance |
Satisfactory when dummy antenna is varied from 40 ohms to 200 ohms. |
|
Receiver
|
Description |
Nominal |
Limit |
|
Intermediate frequency |
|
|
|
1st IF |
10.695 MHz |
|
|
2nd IF |
455 kHz |
|
|
Sensitivity for 500 mW output |
0.3uV |
1uV |
|
Sensitivity at 10dB (S+N)/N |
0.7uV |
1.0uV |
|
Adjacent channel rejection |
65dB |
55dB |
|
Image rejection (1st IF/2nd IF) |
70dB |
60dB |
|
IF rejection ratio (1st IF/2nd IF) |
60dB |
45dB |
|
Signal-to-Noise ratio |
|
|
|
at 1mV input |
40dB |
35dB |
|
Distortion at 1 mV input, |
|
|
|
30% mod. (500 mW out) |
3% |
5% |
|
AGC Figure of merit at 50mV input |
80dB |
70dB |
|
Power output at 1 mV input |
|
|
|
Undistorted (10% THD) |
4.5W |
4.0W |
|
Maximum |
5.0W |
4.5W |
|
Electrical fidelity compared to 1000 Hz |
|
|
|
450 Hz |
-6dB |
-6 ±3dB |
|
2500 Hz |
-6dB |
-6 ±3dB |
|
Cross modulation |
50dB |
40dB |
|
Squelch |
60dB |
60 ±6dB |
|
Current consumption (no signal) |
250 mA |
300 mA |
|
Signal meter sensitivity to light 3th LED |
40dB |
40 ± 6dB |
|
Noise blanker |
20dB |
16dB |
|
Automatic noise limiter |
16dB |
12dB |
Weather Radio
|
Description |
Nominal |
Limit |
|
20dB quieting |
0.7uV |
1.5uV |
|
-3dB limiting |
1uV |
2uV |
|
Frequency error |
0 |
2 kHz |
|
Distortion at 250KV input |
3% |
7% |
|
Power output at 100uV input |
|
|
|
Undistorted (10% THD) |
4W |
3W |
|
Maximum |
4.5W |
4W |
Public Items
|
Description |
Nominal |
Limit |
|
10% THD output power |
4W |
3.5W |
|
Microphone sensitivity for 4W |
5mV |
10mV |
|
Current drain at 10% THD power |
1000mA |
1200mA |
Fuse
WHT wire: 1 Amp.
RED wire: 2 Amp.
|
General power requirement |
12~16VDC |
|
Dimensions |
(W)5/16"
(150mm) (H)1
14/16 (47mm) |
|
Weight |
2 lbs. 4.5 oz. (1kg) |
Note: Nominal specs
represent the design specs; all units should be able to approximate these- some
will exceed and some may drop slightly below these specs. Limit specs represent
the absolute worst condition that still might be considered acceptable; in no
case should a unit perform to less than any limit spec.
Disclaimer: Although the greatest care has been taken while compiling these documents,
we cannot guarantee that the instructions will work on every radio presented.