Radio Shack PRO-79 User Manual

49

Frequency Coverage (MHz):

10 Meter Amateur Radio  ..................... 29–30 (in 5 kHz steps)
VHF Lo  ................................................ 30–50 (in 5 kHz steps)
6 Meter Amateur Radio  ....................... 50–54 (in 5 kHz steps)
Aircraft  ............................... 108–136.9875 (in 12.5 kHz steps)
Government .....................................  137–144 (in 5 kHz steps)
2 Meter Amateur Radio  ................... 144–148 (in 5 kHz steps)
VHF Hi  ............................................. 148–174 (in 5 kHz steps)
Amateur Radio/Government  ....... 380–450 (in 12.5 kHz steps)
UHF Standard ............................. 450–470 (in 12.5 kHz steps)
UHF “T” ....................................... 470–512 (in 12.5 kHz steps)

Channels of Operation ....... 200 channels/20 monitor memories

Sensitivity (20 dB S/N):

29–54 MHz  ...................................................................  0.5 

µ

V

108–136.9875 MHz  ......................................................  1.0 

µ

V

137–174 MHz  ...............................................................  0.5 

µ

V

380–512 MHz  ...............................................................  0.7 

µ

V

Spurious Rejection (FM @154 MHz)  ...............................  50 dB

Selectivity:

±

10 kHz  .........................................................................  –6 dB

±

18 kHz  .......................................................................  –50 dB

Search Speed  ..............................................Up to 50 Steps/Sec

Scan Speed  .......................................... Up to 25 Channels/Sec

Delay Time ................................................................ 2 Seconds

IF Frequencies:

1st IF  ........................................................................  10.7 MHz
2nd IF .......................................................................... 455 kHz

IF Interference Ratio (10.7 MHz)  ..................  70 dB at 150 MHz

Squelch Sensitivity:

Threshold ...................................................... Less than 0.5 

µ

V

Tight (FM)  ......................................................  (S + N)/N 25 dB
Tight (AM)  ......................................................  (S + N)/N 20 dB

Antenna Impedance  ...................................................  50 Ohms

Audio Output Power (10% THD) ....................  180 mW Nominal

Built-In Speaker  ...........................  1

3

/

8

 Inches (36 mm), 8 Ohms

Operating Temperature ........................................... 14

°

 to 140

°

F

(–10

°

 to 60

°

C)

20-314.fm  Page 49  Monday, December 13, 1999  12:55 PM