Specifications – Radio Shack PRO-28 User Manual
Page 39
39
SPECIFICATIONS
Frequency Coverage:
29–54 MHz (in 5 kHz steps)
137–174 MHz (in 5 kHz steps)
406–512 MHz (in 12.5 kHz steps)
Channels of Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . 30 channels
Sensitivity:
(FM: 20 dB S/N at 3 kHz deviation):
29–54 MHz . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.4
µ
V
137–174 MHz . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.5
µ
V
406–512 MHz . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.6
µ
V
Selectivity:
±10 kHz . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –6 db
±17 kHz . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –50 db
Scan Speed . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 Channels/Sec.
Search Speed . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20 Steps/Sec.
Delay Time . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 Seconds
Acceptable RF Displacement . . . . . . . . . . . . . . . . . . . . . . . . . . . ±6 kHz
IF Frequencies . . . . . . . . . . . . . . . . . . . . . . . . 10.85 MHz and 450 kHz
Squelch Sensitivity: Threshold . . . . . . . . . . . . . . . . . . Less than 0.4 mV
Tight (S+N)/N . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25 dB
Built-in Speaker . . . . 1
9
/
16
inches (4 cm) 8 Ohm, 0.5 W, Dynamic Type
Power Requirement . . . . . . . . . . . . . . DC 4 AA Batteries (6.0 VDC), or
4 AA Rechargeable Ni-Cd Batteries (4.8 VDC), or
Vehicle Battery DC Adapter (Cat. No. 270-1533), or
AC Adapter (Cat. No. 273-1652)
Current Drain:
Squelched . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45 mA
Full Volume Unsquelched . . . . . . . . . . . . . . . . . . . . . . . . . 125 mA
Dimensions (HWD) . . . . . . . . . . . . . . . . . . . . 6
3
/
8
Ч
2
11
/
16
Ч
1
9
/
16
Inches
(162
Ч
68.5
Ч
39 mm)
Weight. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8.8 oz (250 g)
Specifications are typical; individual units might vary. Specifications are
subject to change and improvement without notice.
20-508.fm Page 39 Wednesday, August 4, 1999 1:50 PM