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4 - 15
4-8 RF UNIT ADJUSTMENT
ADJUSTMENT
ADJUSTMENT CONDITION
OPERATION
ADJUSTMENT
POINT
VALUE
PRESET
• Frequency
: 14.100000 MHz
• Mode
: CW
• [DUALWATCH] : "OFF"
• [ATT]
: "OFF"
• [RF/SQL]
: Center position
• [RF POWER] : "MAX"
• Transmitting
• Set 2 tr immer capacitors to the
preset position as illustrated below.
C1238, C1036
(as shown)
TX PEAK
• Frequency
: 14.100000 MHz
• Mode
: USB
• [MIC GAIN]
: Center position
• Transmitting (Max. power)
1) Connect a RF Voltmeter to
J201
.
2) Adjust the output voltage.
L1553
Maximum
voltage
RX
SENSITIVITY
(MAIN BAND)
1 • Frequency
: 14.100000 MHz
(Main band)
• Mode
: USB
• [FIL]
: 2.4 kHz
• [TWIN-PBT] :
"Center"
(Push [PBT-CLR] for 1 sec.)
• [P.AMP1]
: "ON"
• Receiving
1) Connect an SSG to [ANT1] and set
as;
Frequency
: 14.101500 MHz
Modulation :
None
Level
: 0 dBµ
†
(–107 dBm)
2) Connect an AC Millivoltmeter and a
speaker to [EXT-SP].
3) Adjust the receive sensitivity by
tuning the core.
L1211 has two peak points. Tune
the core in the upper portion.
L1211, C1238
(L1211: Peak
point in the upper
portion)
Max.
sensitivity
(Minimum
noise level)
(SUB BAND)
2 • Frequency
: 14.100000 MHz
(Sub band)
• Mode
: USB
• [DUALWATCH] : "ON"
• [FIL]
: 2.4 kHz
• [TWIN-PBT] :
"Center"
(Push [PBT-CLR] for 1 sec.)
• [P.AMP1]
: "ON"
• [BALANCE]
: "SUB MAX"
• Receiving
1) Connect an SSG to [ANT1] and set
as;
Frequency
: 14.100000 MHz
Modulation :
None
Level
: 0 dBµ
†
(–107 dBm)
2) Connect an AC Millivoltmeter and a
speaker to [EXT-SP].
3) Adjust the receive sensitivity by
tuning the core.
L1011 has two peak points. Tune
the core in the upper portion.
L1011, C1036
(L1011: Peak
point in the upper
portion)
Max.
sensitivity
(Minimum
noise level)
MIXER
BALANCE
(MAIN BAND)
1 • Frequency
: 1.907500 MHz
(Main and sub
bands)
• [DUALWATCH] : "ON"
• [FIL]
: 2.4 kHz
• [TWIN-PBT] :
"Center"
(Push [PBT-CLR] for 1 sec.)
• [P.AMP1]
: "ON"
• Receiving
1) Connect a Spectrum Analyzer to
J1651.
2) Adjust the leaking LO signal level.
R1206, R1207
Minimum
leaking
level
(SUB BAND)
2
• Adjust the leaking LO signal level.
R1006, R1007
†
; The output level of the standard signal generator (SSG) is indicated as the SSG’s terminated circuit.
Center line
Core
Core
Core
Core