T.E.M. A07B500S Manual - page 66
A07B500S manual
Pag.
66
INTERNAL ADJUSTMENTS & SETTINGS
See figg. 9.a , 9.b , 9.c for function number
N°
Board name/
Component
FUNCTION
DESCRIPTION
0
DLCD/Z2
Password
Set jumper to PASSW. to enable password function.
1 MBP/RT5 Freq.dev.display Adjust
to
display modulation = 75 Khz on Page 0
2
MBP/RT4
Pilot THD
Adjust to minimum pilot THD
3 MBA/RT2 Chan.
Separation Adjust for max channel separation
4 MBA/RT3 Chan.
Separation Adjust for max channel separation
5
MBP/RT7
MPX freqquency
deviation
Adjust, with nominal MPX input level, for 75 Khz
frequency deviation
6
AGC/RT1
AGC level input
Adjust, with nominal LF level input, DC voltage on DZ1
to 2.6V
7
MBP/RT1
Clipper symm.
Adjust for clipper symmetry
8 MBP/RT6
Clipper
level Adjust
to the desired clipper level
9
MBP/RT8
33 KHz notch
Adjust for minimum on the RIGHT channel
10 MBP/RT11
RIGHT gain
Adjust for minimum on LF monitor ( L= -R )
11 MBP/RT10
22.7 KHz notch
Adjust for minimum on the RIGHT channel
12
MBP/RT9
19 KHz notch
Adjust for minimum on the RIGHT channel
13 DC250/RT2
PWR
offset
Adjust to obtain (without RFin) 0Vdc on PWR
feedthrough
14
DC250/RT1
PWR meas.
Adjust to read on display (without RF load) PWD=PWR
(PWR set = 50W)
15 DC250/RT3
PWD meas.
Adjust to obtain Pout = 500W (PWD set = 500W)
16 DC100/RT4
PWD
offset
Adjust to obtain (without RFin) 0Vdc on PWD
feedthrough
17
DLCD/Z1
Run/Boot
Set jumper to RUN for normal operation, to BOOT for
firmware loading ( by COM1 )
18
DLCD/BT1
Clock battery
Use only 3.3 V lithium battery (WARNING:TOXIC
COMPONENT)
19
DLCD/P9
MCU reset
Press button to Reset 68HC11 microcontroller
20
SINTD/RT1
Mono frequency
deviation
Adjust, with nominal mono audiolevel in MPX input, for
75 Khz deviation
21 DMPX/RT3
Pilot phase
Adjust to the right phase by antiphase tecnique
22 DMPX/RT1
Pilot level
Adjust to 20dB less than MPX signal
23 DMPX/RT2
MPX spurious
Adjust for minimum spurious of MPX signal
24 DMPX/C22
Pilot frequency
Adjust stereo subcarrier to 19 Khz +/-1Hz
25 LCDP/U2
Flash Memory
Change for program upgrade
26 A15/RT1
BFQ68 bias
Adjust for 200 mA collector current without RF power
27 A15/RT2
DU2840 bias
Adjust for 20 mA drain current without RF power