02048pin13
PLL Main Loop VCO
RF
millivoltmeter
(>
60
mV)
VR2001
Side-Tone
&
Beep Level
FT-840 Technical Supplement
TP2013
PLL Main Loop VCO:
DC
voltmeter
TP2004
Ground this post
while aligning the
Local Unit
TP2001
Local BPF Check:
.J'2011
3
.J'2015
<.Z.ZZ."Z.""Zr..c.r:> ci:z:z:zz
222:::a e:::rcc-.ccn
.P2012
..f'2014
..!'2016
CZZZ""CZ"Z>
<Z222.'"Z'r'r'�
<%22."'2.-Z:Z-C�
T2004
T2005
TP2015
J2021
T2002
Local
BPF
TP2005
Reference Oscillator Check:
RF
millivoltmeter
TP2014
I
JP2001
1st Local Output Level
/
.
Reference Oscillator check:
RF
millivoltmeter
frequency counter
(5.242880 MHz± 3 Hz)
-101-
TP2003
Carrier Level Adjust
&
Freq. check
Carrier Level Adjust
&
Freq. check:
02044
pin
2
DDS
2
check:
Transmitter Carrier Point
RF
millivoltmeter(>
320
mV)
RF
millivoltmeter(>
65
mV)
to chassis ground
Local Unit Alignment Diagram
02036 pin 2
DDS 1 check:
RF
millivoltmeter (>110 mV)
TC2701
Reference Oscillator
3-7
Summary of Contents for FT-840
Page 10: ......
Page 22: ......
Page 44: ......
Page 60: ......
Page 62: ......
Page 64: ... N otes ...
Page 66: ... ...
Page 68: ... N otes ...
Page 70: ......
Page 72: ... ...
Page 74: ......
Page 76: ... N otes ...
Page 78: ......
Page 82: ......
Page 84: ......
Page 86: ......
Page 90: ...5 1 8 FT 840 Technical Supplement ...
Page 92: ......
Page 94: ...Notes ...
Page 96: ......
Page 100: ... ...
Page 102: ......
Page 104: ......
Page 106: ......
Page 108: ......
Page 110: ......
Page 114: ... ...
Page 116: ......
Page 118: ......
Page 120: ......
Page 124: ... N otes ...
Page 126: ......
Page 128: ......
Page 132: ......
Page 134: ......
Page 136: ......
Page 144: ......