Hytera PD362, Руководство по обслуживанию

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Uc (430
‐
470 MHz)
Block Diagram
43
10.7
Transmitter Circuit
ANT
Gate voltage control
Subtracter
Gain : 12 dB
Po (-1dB ):15
static Ic :
40 mA
Gain : 12 dB
Po (- 1dB): 27 dB
m static Id :
100 mA
Gain : 10 dB
Po (-1dB): 35 dB
m static Id :
250 mA
S 11 :
≤
- 15 dB
S 21:
≥
- 0 . 2 dB
S 21 / dB :
≥
- 0 . 3
S 11 / dB
： ≤
- 15
S 22 / dB ： ≤ - 15
TX - RX
Isolation / dB
：≤ - 20
ANT - RX
Isolation / dB ：≤ - 20
S 11 / dB
： ≤
- 15
S 22 / dB ： ≤ - 15
S 21 / dB :
≥
- 0 . 8
BW ( -3 dB ): 520 MHZ
Stop band
attenuation : - 50 dBc
TX VCO
level : > 0
dBm
BATT
I / V convertor
APC module :
1 ) attack time and decay time is less than
1. 5 mS
2 ) close gain rate Ga is large than
20 value
Gain : 15 dB
Po( - 1dB ): 5 dB
mstatic Ic :
12 mA
S
a
m
p
li
n
g
r
es
is
to
r
Pre - Driver 2
Drive - stage Final - stage
Low - pass
Filter
Pre - Driver 1
PA match
Tx / Rx
Switch
2SC3356 BFQ 540 2SK3078
RFM03U3CT
T 3 V
APC From TV
To RX
TxVCO 3 V
2 SC3356 2SC5108
T / R
T / R
T / R +
= - 10 dB
Gain : 15 dB
Po ( -1dB ): 5 dB
mstatic Ic :
12 mA
Gain : 11 dB
Po (-1dB ): 3dB
mstatic Ic :
5 mA
buffer Pre - Driver
Buffer amplifier Interstage isolation Pre-Driver Driver/Final Stage TX/RX switch Low-pass filter
π
-type
attenuator
Π
dB
m
π
-type
attenuator