Specifications

DTT 7685x
SBU Technology – Tuners ATSC half NIM with Ch 3 / 4 modulator
20 Apr 2007
Preliminary Specification Page 9 / 29
7. Electrical Characteristics
7.1 RF Section
No Parameters Unit Min Typ Max Remarks
1. Frequency Range
Analog
Band - 1
Band - 2
Band - 3
Digital
Band - 1
Band - 2
Band – 3
MHz
55.25
151.25
421.25
--
57.00
153.00
423.00
-
145.25
415.25
859.25
--
147.00
417.00
863.00
2. IF Frequency
Center
Picture
Chroma
Sound
MHz
44
45.75
42.17
41.25
3. Frequency Margin MHz 3
4. Tracking
PC-CC Tilt
PC-SC Tilt
dB
-3
+3
+5
5. V.S.W.R. - 2 6
6. Noise Figure
Air Channels
Cable channels
dB
6
6
8
10
7. Voltage Gain @ pin 17 dB 39
8. AGC Range
B1
B2
B3
dB
50
45
40
70
58
58
9. 1% Cross Modulation
(N±1)
(N±2)
dBuV
69
74
Unwanted: 80% AM.
S/I=46dB @ 75Ω
load open.
10. CB Rejection
0.5 - 30MHz
30 - 41MHz
dBuV
101
81
11. IF Rejection dB 60 88
12. Beat Rejection
CH06
CH05
dB
50
55
55
60
13. FM Beat Susceptibility
88.1 – 92MHz
92.1 - 107.9MHz
dBuV
59
69
63
73
14. FM Rejection on CH06
88.1 - 90.1MHz
90.1 - 107.9MHz
dB
2
5
15. Half-IF Susceptibility
Air Channels
Cable Channels
dB
25
18
35
25
16
Adjacent Channel
Rejection
dB 55 60
17. Image Rejection
CH06
CH14-CH55
All other channel
dB
70
60
50
74
70
68
18. LO Phase Noise
1kHz
10kHz
100kHz
dBc/Hz
-52
-85
-106
-62
-90
-112
19. Oscillator Stability at 25°C ± 15°C ppm 30
4MHz crystal ref.