Radio Shack 20-526, Руководство пользователя

Страница: 111 / 124

111
1240–1300 MHz ................................................................ 0.7
µ
V
AM:
25–54 MHz ........................................................................... 1
µ
V
108–136.9875 MHz .............................................................. 1
µ
V
137–174 MHz .................................................................... 1.5
µ
V
216–225 MHz .................................................................... 1.5
µ
V
406–512 MHz ....................................................................... 2
µ
V
806–960 MHz ...................................................................... 2
µ
V`
1240–1300 MHz ................................................................... 3
µ
V
Selectivity:
25 – 27.995 MHz in AM mode
-6 dB ............................................................................... +/-5 kHz
-50 dB ............................................................................. +/-6 kHz
All frequencies at AM and FM mode except 25 – 27.995 MHz at AM
-6 dB ............................................................................. +/-10 kHz
-50 dB ........................................................................... +/-18 kHz
IF Rejection
380.8 MHz at 154.1 MHz ................................................... 60 dB
21.4 MHz at 154.1 MHz .................................................... 100 dB
Spurious Rejection
(at 154.1 MHz FM).............................................................. 40 dB
Scanning Speed and Delay
Scanning Rate ............................ Up to 60 Channels per Second
Search Rate...................................... Up to 75 Steps per Second
Conventional Channel Delay Time .............................. 2 seconds
Priority Sampling.......................................................... 2 seconds
Trunking Talkgroup Delay Time ....................... User configurable
Intermediate Frequencies (IF):
1st ............................................................................... 380.8 MHz
2nd................................................................................ 21.4 MHz
3rd................................................................................... 455 kHz
Squelch Sensitivity:
Threshold (FM and AM)..................................................... 0.5
µ
V
Tight (FM) ........................................................................... 25 dB
Tight (AM) ........................................................................... 20 dB
Antenna Impedance....................................................... 50 Ohms