User's Manual Part 1
AT7400 Owner Manual Rev. 2.0 – October 2006-10-23 Section 5 -7/17
6.4. Module 4451 – Tuning and DC Setup Instructions
The module 4451 can either be adjusted connected to the equipment or out of it. On both cases, it is mandatory
to keep the RF out put correctly loaded (50ȍ). A +32V/2A power supply must be ready to be driving the drawer,
during the proposed adjustments, done under reduced RF power conditions. While doing one pallet adjustment,
disconnect the DC main power out from the other modules 4451.
RF
OUT
.
.
C5
C9
C13
T1
C35
C42
C39
T2
CI- 4
CI-2
TPO-2
T2
VG S AD J
TPO-1
VG S A D J
T1
CI - 1
HC - 1
R9
R10
+3 2V
CON-2
CO N -2
+32V
CON-3
ID1
ID2
TE MP
R11
BLF861A
.
CI-3
S1
.
CI - 5
.
CI-7
.
CI-8
T4
T3
RF
IN
BLF861A
TP O -1
T1 I D ADJ US T CURRENT: 6 0mV R39//R35
withou t RF si gnal i npu t– AB cla ss
TPO-2
T 2 ID ADJUST CURRE NT : 60m V R36/ /R37
wi tho ut RF si gnal i n put – AB cl ass
RF
OUT
.
.
C5
C9
C13
T1
C35
C42
C39
T2
CI- 4
CI-2
TPO-2
T2
VG S AD J
TPO-1
VG S A D J
T1
CI - 1
HC - 1
R9
R10
+3 2V
CON-2
CO N -2
+32V
CON-3
ID1
ID2
TE MP
R11
BLF861A
.
CI-3
S1
.
CI - 5
.
CI-7
.
CI-8
T4
T3
RF
IN
BLF861A
RF
OUT
..
..
C5
C9
C13
T1
C35
C42
C39
T2
CI- 4
CI-2
TPO-2
T2
VG S AD J
TPO-1
VG S A D J
T1
CI - 1
HC - 1
R9R9
R10
+3 2V
CON-2
CO N -2
+32V
CON-3
ID1
ID2
TE MP
R11
BLF861ABLF861A
..
CI-3
S1
..
CI - 5
..
CI-7
..
CI-8
T4
T3
RF
IN
BLF861ABLF861A
TP O -1
T1 I D ADJ US T CURRENT: 6 0mV R39//R35
withou t RF si gnal i npu t– AB cla ss
TPO-2
T 2 ID ADJUST CURRE NT : 60m V R36/ /R37
wi tho ut RF si gnal i n put – AB cl ass
Fig.5.5: Module 4451 - Tests point and connections illustration
The adjustment procedures are maid one-by-one, an individual adjustment of each sub-module 4451. At the time
that one sub-module is being adjusted, the others 3 should have disconnected its respective DC power supply.