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C148CTL DX ALIGNMENT PROCEDURE
STEP
PRESET ТО
ADJUSTMENT
REMARKS
3
Same as Step 1,
except:
Mic Input: 30mV
lKHz
L65
Restore PC-834. Turn the oore to the
bottom.
4
Same as Step 3
L64, L66,
and L67.
Adjust for maximum reading on RF VTVM
(across 50ohm Dummy Load) .
5
Same as Step 3
L65
Set the Band: HI, CH 40. And adjust for
maximum reading on RF VTVM. Then turn the
Band: Low, CH 1. Readjust for equalized
output pcwer.
6
Same as Step 1,
except:
Mode
: AM
Mic Input 90%
L54
Adjust for maximum reading on RF VTVM
(Final Output Adj.).
7
Same as Step 3
VR7
Adjust ALC for 24.5V reading on RF VTVM
(12w/50ohm Single tone).
8
Same as Step 1
VR4
Adjust for minimum reading on Oscilloscope
for both USB abd LSB (minimum carrier Adj.).
9
Same as Step 1,
except:
Mode
: AM
VR11
Adjust for 5.0W reading on RF Pcwer Meter
(AM carrier output adj.).
10
Mic Input: 30mV
lKHz
VR8
Set the meter SWto S/RF position. Adjust
the VR8 so that the radio's meter reads
5W
(between Green zone sind Red zone) , "S"
meter adj.
11
Same as Step 1,
except:
AM Mode
Mic Input: 30mV
lKHz
VR5
Adjust for 90% modulation on Oscilloscope
(AM modulation adj.).
Содержание 148GTL-DX
Страница 32: ...со SO AOJ VR2 BLOCK DI AGRAM ...
Страница 33: ...SCHEMATIC DIAGRAM ...
Страница 34: ...WIRING DIAGRAM OFF LOW OFF CAL P C 8 8 I P C 8 8 0 Y Y 027 Wl YEL 1 5 4 0 3 ____ J 503 ANT J 502 6 7 ...
Страница 41: ...Parts Layout Top View Î37 2SB525C 1 4 1 5 ...
Страница 42: ...PARTS LAYOUT Top View ...
Страница 43: ...ADDED PARTS MAIN PCB Bottom View PC 879AB ...
Страница 44: ...COPPER PATTERN SWR PCB CH SW PCB LED PCB CD ...
Страница 48: ...го w INTERNAL DIAGRAM IC s MB87I9 ...
Страница 49: ...INTERNAL DIAGRAM IC s го А ...
Страница 50: ...INTERNAL DIAGRAM IC s S 0 4 2 P 25 ...
Страница 58: ...со го BLOCK DI AGRAM ...
Страница 59: ...PB OIO SCHEMATIC DIAGRAM ...
Страница 60: ...WiRING DIAGRAM 3 5 3 6 P C 881 P C 8 8 0 ...
Страница 66: ...COPPER PATTERN MAIN PCB ...
Страница 68: ...P B O I O ADDED PARTS MAIN PCB H fs il 8 46 ...
Страница 70: ...COPPER PATTERN SUB ASSY PCB s ...
Страница 71: ...PARTS LAYOUT MIC JACK 49 ...
Страница 74: ...INTERNAL DIAGRAM IC s MC14008B 1 4 Cou l 13 S 4 13 S 3 11 S2 10 S 1 16 15 14 13 12 11 10 9 52 ...
Страница 75: ...сл С О INTERNAL DIAGRAM IC s OSC out Г 2 out FS PO PI P2 P3 PA P5 P6 P7 P8 MC145106 ...
Страница 76: ...INTERNAL DIAGRAM IC s 14 0UT4 13 I N 4 12 lN 4 11 VEE 10 IN 3 9 I N 3 8 0UT3 TA75902P 54 ...
Страница 77: ...INTERNAL DIAGRAM IC s S 042P 55 ...