Specifi Cations - Radio Shack 20-427 PRO-2054 User Manual

specifi cations
Frequency Coverage
28—54 MHz .................................................... (in 5 kHz steps)
108—136.99166 MHz ................................ (in 8.33 kHz steps)
137—174 MHz .................. (in 5, 6.25, 7.5, or 12.5 kHz steps)
406—512 MHz ........................................... (in 6.25 kHz steps)
806—823.9875 MHz .................................. (in 6.25 kHz steps)
849—868.9875 MHz .................................. (in 6.25 kHz steps)
894—960 MHz ........................................... (in 6.25 kHz steps)
Memory channels ............................................................. 300
Channel memory banks ..................................................... 10
Sensitivity (20 dB S/N)
FM/AM(aircraft band)
28—54 MHz ...................................................................0.3 µV
108—136.99166 MHz (AM) ..............................................1 µV
137—174 MHz ...............................................................0.5 µV
406—512 MHz ...............................................................0.5 µV
806—960 MHz ...............................................................0.7 µV
Selectivity
–6 dB .......................................................................... ±10 kHz
–50 dB ........................................................................ ±18 kHz
Spurious Rejection (at 154.1 MHz FM) .............................40 dB
Scanning Rate .......................... Up to 60 Channels per Second
Search Rate .................................... Up to 75 Steps per Second
Delay Time ................................................................. 2 seconds
Intermediate Frequencies (IF)
1 ............................................................................380.8 MHz
st
2 .............................................................................21.4 MHz
nd
3 ................................................................................ 455 kHz
rd
Priority Sampling ................................................... 2 seconds
Operating Temperature ................–4 to 140° F (–20 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 µV
Tight (FM) .......................................................................25 dB
Tight (AM) ......................................................................20 dB
Antenna Impedance .................................................... 50 Ohms
Beyond the Basics
49