Level Diagram - Kenwood NX-5900 Service Manual

LEVEL DIAGRAM

Receiver Section
5
RF (Center Frequency)
-120dBm -123dBm
-121dBm
ANT D305 C552 L521
D306 IC501
BPF
C413 D308
ANT
LPF SW
SW
C5553 L522
BPF
4
-123dBm
Transmitter Section
3
AF (1kHz)
5mVrms
IC902 IC706 IC902
MIC
2
SSI SSI
CODEC CODEC
1
A B
-124dBm -113dBm -114dBm -116dBm
C544 Q501 C534 L510 C517
IC502
BPF
C533 IC500 C500 XF600 C663 Q604 C658 Q603 C637
RFAMP
SW
C545 Q502 C535 L511 C518
BPF
RFAMP
-113dBm
-124dBm -114dBm
To make measurements in the AF section, connect the AC level meter.
(ANT input: –53dBm, 1kHz FM,1.5kHz DEV (Narrow). SP output: 4W@4ohm Load)
In the RF section, use 470pF coupling capacitor.
(The display shows the SSG input value required to obtain 12dB SINAD.)
AF
(1kHz)
65mVrms(793M)
65mVrms(825M)
-5dBm
4dBm
Narrow
Q102 L136
Q104 Q106 L137
C190 C166 C170
VCO
Doubler Coupler
To PLL IC
C
(No.RA032<Rev.001>) 2-12
1st IF (58.05MHz)
-117dBm -111dBm
-114dBm -102dBm
BPF
MCF IFAMP IFAMP
RX PLL
RF (Center Frequency)
13dBm(793M)
-3dBm 1.5dBm 10dBm 15dBm(825M)
C213 Q107 C307 IC300 C316 Q300
Pre- Pre-
Buff
Drive1 Drive2
* Transmit frequency : 700MHz band(793MHz) / 800MHz band(825MHz)
D E
2-12 (No.RA032<Rev.001>)
AF (1kHz)
141mVrms
IC600 IC706 IC902
C927 IC903
SSI
IFIC
CODEC
28.8mVrms
25dBm(793M) 35.5dBm(793M) 45.5dBm(793M)
27dBm(825M) 37dBm(825M) 46.5dBm(825M)
C327 Q301 C448 Q302 C360 Q303 C392
Pre-
Drive Final
Drive3
F
116mVrms
IC719
VOL
C944 IC911 C969
30W(793M)
35W(825M)
ANT
C413
ANT
LPF
SW
G