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