Kenwood R-2000 - Receiver Adjustments

R-2000
ADJUSTMENT
Adjusting Receiver
Section
Measurement
Adjustment
Item
Condition
Test
Ter-
Specifications
equipment
Unit
min
al
Unit Part
Methoci
1
.
RB
voltage
DCVM
RX
TP4
RX
VR7
2.3V
2.
BFO
1)
MODE:
USB
Frequency
RX
TP3
RX
T19
456,500Hz
±50Hz
(Coarse
counter
adjustment)
3.
Sensitivity
1)
f: 14,525.0
kHz
·ssG
Rear
ANT
PLL
T1,
MAX
(RF,IFamp)
MODE:
USB
AFVM
panel T2. T4,
AGC:
FAST
Oscillo-
T5
SSG
output:
0 dBµ scope
EXT
SP
RX
T5
to
MAX
S/N:
10dB
or
more
AF dummy
load
T16,
T18
Perform
adjustment in
the following order:
T5, T6,
T7,
T8,
T7, T6,
T5, T9,
T10,
T11,
T12,
T11,
T10,
T11, T12,
T11,
T10, T13,
T14,
T15, T16, T18.
4. 1st
MIX
1
) f: 187 .3 kHz
AFVM
Rear
EXT
SP
RX
VR1
MIN.
Heterodyne
BALANCE
MODE:
USB
Oscillo-
panel
TUNING
STEP:
SLOW
scope
AF
dummy
load
5.
BFO
1)
f: 14,525.0 kHz
SP
RX
T19
Alternate MODE
bet-
{Fine ad-
MODE:
USB,
then
LSB
ween
USB
and
LSB
and
justment)
adjust
for
equal
noise
tone.
(Equal highs and lows)
2)
SSG
output:
SSG
Rear
ANT
Receive the
14.525
Within
1.5 dB
14.525 MHz panel
MHz generator signal in
OdBµ
USB
mode, tune
for
1
kHz beat frequency, and
AF output at
0.63V
/8!2.
AFVM
EXT
SP
Set
to
LSB
mode, adjust
Oscillo-
for
1 kHz beat and mea-
scope
sure the AF output
diffe-
AF dummy
rence.
load
6.
FM
sensitiv-
1)
f: 14,525.0 kHz
SSG
Rear
ANT
RX
T21
MAX
S/N:
20
dB
or
more
ity
MODE:
FM
AFVM
panel
EXT
SP
(FM
IF
amp)
SSG
output: 6 dBµ
Oscillo-
(MODE:
1
kHz
scope
DEV:
5
kHz)
AF
dummy
2)
SSG
output:
load
Confirm that the
output
Specified output.
6to100qBµ
is constant from 6 dB
to
100
dB.
7.
S
meter
1) MODE:
USB
S
meter
RX
VRS
Zero
adjustment.
AGC: FAST
Set
to
S
meter starting
point.
2)
f: 14,525.0 kHz
SSG
Rear
~NT
T17
S-1
SSG
output: 8 dBµ
S
meter panel
Adjust
CCW
from
the
peak.
3)
SSG
output:
30
dBµ
VR9 S-9
4)
MODE:
FM
VR6
+40dB
SSG
output:
30
dBµ
8.
Squelch
1)
MODE:
FM
SP
Check Between 1 and 3
AGC: SLOW
(Squelch level)
SQUELCH:
Threshold
BUSY
indicator
goes off.
2)
MODE:
USB
RX
VR5
Point
at which noise
di-
sappears.
3)
f: 14,525.0
kHz
SSG
Rear
ANT
Check
The squelch should
MODE:
USB
AFVM
panel
open at less than
20
SQUELCH:
Threshold
Oscillo-
dBµ and
the
BUSY
SSG
output:
20
dBµ
scope
indicator should
AF
dummy
light.
load
4)
MODE:
FM
The squelch should
SQUELCH:
Threshold
open at less than
0
SSG
output:
0 dBµ
dBµ and the
BUSY
indicator should
light.
26