Radio Shack PRO-90 ユーザーズマニュアル

62

Frequency Coverage:  ........  29–54 MHz (in 5 kHz steps)

108–136.9875 MHz (in 12.5 kHz steps)

137–174 MHz (in 5 kHz steps)

406–512 MHz (in 12.5 kHz steps)

806.0000–823.9875 MHz (in 12.5 kHz steps)
849.0125–868.9875 MHz (in 12.5 kHz steps)
894.0125–956.0000 MHz (in 12.5 kHz steps)

Channels .................................................................  300

Number of Banks .......................................................  10

Sensitivity (AM/FM):

NFM: 20 dB S/N at 3 kHz deviation):

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

µ

V

137–174 MHz  ...............................................  0.4 

µ

V

406–512 MHz  ...............................................  0.4 

µ

V

806–956 MHz  ...............................................  0.6 

µ

V

AM: 20 dB S/N at 60% modulation):

108–136.9875 MHz ......................................  1.5 

µ

V

Spurious Rejection (at 40.84 MHz)  ......................  50 dB

Selectivity:

10 kHz  ...........................................................  –6 dB
15 kHz  .........................................................  –50 dB

IF Rejection (at 162.4 MHz)  .................................  80 dB

Operating Temperature  .. –4

°

 to 140

°

 F (–20

° 

to

 

60

°

 C)

Scan Speed:

Normal .................................  100 Channels/Second
Service ...........................  100 Frequencies/Second

Search Speed:

Normal .......................................  100 Steps/Second
Hypersearch ..............................  300 Steps/Second

Priority Sampling  ..........................................  2 Seconds

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

IF Frequencies  ...  380.7 MHz, 10.85 MHz, and 450 kHz

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

Audio Output  ....................  180 mW nominal into 8 Ohm

Internal speaker

 38 mW nominal into 32 Ohm Stereo Headphones

 9 mW nominal into 64 Ohm Earphone

Built-in Speaker Size  ..........................  1

1

/

2

-inch (36 mm)

20-520.fm  Page 62  Wednesday, August 4, 1999  3:06 PM