Radio Shack 20-164 Scanner User Manual


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Appendix F: Specications
Frequency Coverage:
25.000-26.960 MHz ...................(in 10 kHz steps/AM)
26.965-27.405 MHz ...................(in 10 kHz steps/AM)
27.410-29.505 MHz .....................(in 5 kHz steps/AM)
29.510-29.700 MHz .....................(in 5 kHz steps/FM)
29.710-49.830 MHz ...................(in 10 kHz steps/FM)
49.835-54.000 MHz .....................(in 5 kHz steps/FM)
108.000-136.9916 MHz ..........(in 8.33 kHz steps/AM)
137.000-137.995 MHz .................(in 5 kHz steps/FM)
138.000-143.9875 MHz ..........(in 12.5 kHz steps/FM)
144.000-147.995 MHz .................(in 5 kHz steps/FM)
148.000-150.7875 MHz ..........(in 12.5 kHz steps/FM)
150.800-150.845 MHz .................(in 5 kHz steps/FM)
150.8525-154.4975 MHz ..........(in 7.5 kHz steps/FM)
154.515-154.640 MHz .................(in 5 kHz steps/FM)
154.650-156.255 MHz ..............(in 7.5 kHz steps/FM)
156.275-157.450 MHz ...............(in 25 kHz steps/FM)
157.470-161.5725 MHz ............(in 7.5 kHz steps/FM)
161.600-161.975 MHz .................(in 5 kHz steps/FM)
162.000-174.000 MHz ............(in 12.5 kHz steps/FM)
216.0025-219.9975 MHz .............(in 5 kHz steps/FM)
220.000-224.995 MHz .................(in 5 kHz steps/FM)
225.000-379.975 MHz ...............(in 25 kHz steps/AM)
380.000-419.9875 MHz ..........(in 12.5 kHz steps/FM)
420.000-450.000 MHz .................(in 5 kHz steps/FM)
450.00625-469.99375 MHz ....(in 6.25 kHz steps/FM)
470.000-512.000 MHz ............(in 12.5 kHz steps/FM)
764.000-766.996875 MHz ....(in 3.125 kHz steps/FM)
773.000-775.996875 MHz ....(in 3.125 kHz steps/FM)
794.000-796.996875 MHz ....(in 3.125 kHz steps/FM)
803.000-805.996875 MHz ....(in 3.125 kHz steps/FM)
806.000-823.9875 MHz ..........(in 12.5 kHz steps/FM)
849.000-868.9875 MHz ..........(in 12.5 kHz steps/FM)
894.000-939.9875 MHz ..........(in 12.5 kHz steps/FM)
940.000-960.000 MHz ............(in 6.25 kHz steps/FM)
1240.000-1300.000 MHz ........(in 6.25 kHz steps/FM)
Memory Channels / Banks ..........................1000 / 10
Talk group ID memories ....................................1,500
ID memory banks / Sub-banks .........................10 / 5
Number of memory IDs per sub-bank ..................30
Sensitivity (20 dB S/N):
FM:
25–54 MHz ....................................................... 0.3 uV
108–136.99166 MHz ........................................ 0.3 uV
137–174 MHz ................................................... 0.5 uV
216.0025–224.975MHz ....................................0.5 uV
225-299.975 MHz .............................................0.5 uV
300-405.975 MHz .............................................0.8 uV
406–512 MHz ................................................... 0.5 uV
764–960 MHz ................................................... 0.7 uV
1240–1300 MHz ............................................... 0.7 uV
AM:
25–54 MHz .......................................................... 1 uV
108–136.99166 MHz ........................................... 1 uV
137–174 MHz ................................................... 1.5 uV
216.0025–224.975MHz ....................................1.5 uV
225-299.975 MHz ................................................2 uV
300-405.975 MHz ................................................3 uV
406–512 MHz ...................................................... 2 uV
764–960 MHz ...................................................... 2 uV
1240–1300 MHz .................................................. 3 uV
Selectivity:
All AM and FM (except AM 25 – 27.995 MHz)
..............................................................6 dB +/-7 kHz
.........................................................-50 dB +/-13 kHz
AM 25 – 27.995 MHz
.............................................................-6 dB +/-4 kHz
...........................................................-50 dB +/-6 kHz
Spurious Rejection (at 154.1 MHz FM) ............ 40 dB
Scanning Rate ..........Up to 60 Channels per Second
Search Rate ....................Up to 78 Steps per Second
Delay Time .................................................2 seconds
Intermediate Frequencies (IF):
1st .............................................................. 380.8 MHz
2nd .............................................................. 21.4 MHz
3rd ..................................................................455 kHz
Priority Sampling .......................................2 seconds
Operating Temperature .......................... 14 to 140° F
(-10 to 60° C)
IF Rejection
380.8 MHz at 154.1 MHz ................................... 60 dB
21.4 MHz at 154.1 MHz ................................... 100 dB
Squelch Sensitivity:
Threshold (FM and AM) ..................................0.5 uV
Tight (FM)..........................................................25 dB
Tight (AM) .........................................................20 dB
Antenna Impedance ....................................50 Ohms
Audio Output Power (10% THD) .................170 mW
Built-in Speaker .......................1 3/8 Inches (36 mm)
(8-ohm, Dynamic Type)
Power Requirements:
Batteries ............................................................. 4 AA
External Power ................................................. 9V DC
Current Drain (Squelched) ..............................90 mA
Battery Charge Current .................................150 mA
Dimensions (HWD) ....5 3 /4 x 2 9 /16 x 1 5 /8 Inches
(145 x 65 x 42 mm)
Weight (without antenna and batteries) .........8.5 oz.
(240 g)
Specications and depictions are subject to change
and improvement without notice. Actual product may
vary from the images found in this document.
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