PRESIDENT uniden BENJAMIN UT-552B, Service Manual, Page: 27 / 77

3. Receiver
NO. ITEM UNIT AM SSB FM
1 Antenna input at 500 mW Output
(MAX Sensitivity)
dBJiV + 9.5 MAX 0 MAX
-
2
Sensitivity.at S/N Д О dB
, f f H
, s Ń Î--0 dB)
(FM at S/N 20 dB)
dBjJV 12 MAX
0 MAX 12 MAX
3 AGC (Input 100 dB standard Input
when AF Output Down 10 dB)
dB 70 MIN
70 MIN
-
4
AGC Hump (Output Standard at Input
86 dB output at input of lOOdB)
dB within ± 5
within ± 5
-
5
Frequency Response : UPPER
(1.000 Hz : 0 dB, 6 dB down Freq.)
Hz
1.500-3.000 2.000-4.000 L.500-4.000
6 Frequency Response : LOWER
(1.000 Hz : 0 dB, 6 dB down Freq.)
Hz 200 - 500
100 - 500
200 - 500
7
Cross Modulation
(2 Signa's, D/S Method)
dB
40 MIN
- -
8
AF MAX Output Power
(66 dB Input, 1 KHz MOD)
W 2.5 MIN
2.5 MIN
2.5 MIN
9
AF Output Power at 10 % Distortion
(66 dB Input, 1 KHz MOD)
W
2 MIN
2 MIN
2 MIN
10 Distortion Rate
(1 KHz at 500 mW Output)
% within 7 within 7 within 7
11 RF Gain Control Range dB 30 MIN
30 MIN 30 MIN
12 Hum and Noise Ratio
(1 mV Input at 500 mW Output)
dB
25 MIN 30 MIN
30 MIN
13
Squelch Sensitivity (Threshold) dByV 12 MAX
12 MAX
12 MAX
14
Squelch Sensitivity (Tight) dBjJV
5 4 - 7 8
5 4 - 7 8 5 4 - 7 8