Specifications

DTT 7685x
SBU Technology – Tuners ATSC half NIM with Ch 3 / 4 modulator
20 Apr 2007
Preliminary Specification Page 25 / 29
11.4 Digital IF AGC Slope
-60
-50
-40
-30
-20
-10
0
0.00.51.01.52.02.53.03.5
IF AGC(Volt)
dB
11.5 Digital IF AGC Time Constant (Bandwidth)
The dominant IF AGC time constant τ = 1kΩ × 1nF = 1 µSec typ.
The equivalent bandwidth BW = 1/(2πτ) = 159 kHz typ.
11.6 Overall Gain Testing Method
RF AGC: for max gain
IF AGC : 3.0V