User's Manual Part 1
AT7400 Owner Manual Rev. 2.0 – October 2006-10-23 Section 3 - 27/39
RF
OUT
.
.
C5
C9
C13
T1
C3 5
C42
C3 9
T2
CI
-
4
CI-2
TPO-2
T2
VG S ADJ
TPO-1
VG S ADJ
T1
CI-1
HC-1
R9
R10 +32V
CON-2
CON-2
+32V
CON
-
3
ID1
ID2
TEMP
R11
BLF861A
.
CI-3
S1
.
CI-5
.
CI-7
.
CI-8
T4
T3
RF
IN
BLF861A
RF
IN
RF
OUT
NETWORK ANALYZER
30dB / 50W
ATTENU ATOR
+32V / 2A
+32V / 2A
RF
OUT
.
.
C5
C9
C1 3
T1
C3 5
C42
C3 9
T2
CI
-
4
CI-2
TPO-2
T2
VG S ADJ
TPO-1
VG S ADJ
T1
CI-1
HC-1
R9
R10 +32V
CON-2
CON-2
+32V
CON
-
3
ID1
ID2
TEMP
R11
BLF861A
.
CI-3
S1
.
CI-5
.
CI-7
.
CI-8
T4
T3
RF
IN
BLF861A
RF
OUT
..
..
C5
C9
C1 3
T1
C3 5
C4 2
C3 9
T2
CI
-
4
CI-2
TPO-2
T2
VG S ADJ
TPO-1
VG S ADJ
T1
CI-1
HC-1
R9R9
R10 +32V
CON-2
CON-2
+32V
CON
-
3
ID1
ID2
TEMP
R11
BLF861ABLF861A
..
CI-3
S1
..
CI-5
..
CI-7
..
CI-8
T4
T3
RF
IN
BLF8 61A
BLF861A
RF
IN
RF
OUT
NETWORK ANALYZER
30dB / 50W
ATTENU ATOR
+32V / 2A
+32V / 2A
MODULE 4464
Fig. 3.12: Suggested gain and curve response evaluation for PCB CIM3440
The network analyzer level should be set upfront for -20dBm at the assigned UHF channel band. Monitor the
results at the output of the PCB CIM3440. Tune the cap trimmers for best curve response, flat shape inside the
band. Watch the gain according with the indication below:
x 16dB – Band 1: ch14 to ch25.
x 15dB – Band 2: ch26 to ch38.
x 15dB – Band 3: ch39 to ch53.
x 14dB – Band 4: ch54 to ch69.
3.10. Module 4456 – 60A Multiple Power Supply
In the ADVANCED TV line all DC power supplies uses a switching technology, type full-bridge powered by 208 up
to 240 Vac, showing overall efficiency above 80%. As part of the power supply design, there is a power factor
corrector, PFC, circuit. Besides correct the power factor to close to 1, this circuit also contributes to reduce the
harmonic content returning from the unit into the AC mains.