Operating instructions

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Tone Generation Section
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20-Feb-2002 23:41:52
C:\Program Files\Design Explorer 99 SE\rft\t50\t50.Ddb - tonetx.sch
Title
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Revision:
Sheet of
A3
RF Technology Pty Ltd
Unit 10, 8 Leighton Place
Hornsby, NSW 2077
AustraliaRev. Release Date: Originator:
Rev No. ECO No. Description of Change
TONEP+
TONEP-
TONE_DEV_U/D
CTCSS_SEL
SCLK
MOSI
EXT_TONE_SEL
TONE_OUT
TONE_OUT
R522
68K
R501
47K
R509
7K5
R500
47K
R508
7K5
C506
100pF
C507
100pF
GND
5
6
7
U502B
LM224
R511
7K5
R510
7K5
GND
2
3
1
U502A
LM224
R504
560R
GND
R514
10K
R503
22K
C501
22pF
C500
22pF
C513
1uF
C509
1uF
C508
100nF
+5V
R507
1M
X500
4MHz
GND
CTCSS_SEL
MOSI
SCLK
CTCSS_OUT
GND
GND
R516
680R
16
15 14
U301D
DG411
R502
47K
-10V
TONE_DEV_INC
R517
47K
R518
47K
R519
47K
C514
22nF
C515
100nF
C516
1n2F
9
10
8
U502C
LM224
GND GND
2
1
VDD
6
GND
3
INC
5
U/D
4
U503
MAX5161L
-2.5V
V+
4
V-
11
U502E
LM224
-10V
+10V
R523
1K
R524
NF
+2.5V
14
13
12
U502D
LM224
GND
Q500
MMBT3906
Q501
MMBT3906
R505
10K
R506
10K
R520
47K
-2.5V
+2.5V
+2.5V
R521
47K
-2.5V
(NPO)
(X7R - 10%)
1
2 3
U301A
DG411
FILTER_OFF
FILTER_OFF
R530, R531, R508, R509, R532, R533, R510, AND R511
Should be 0.25%, 50ppm TC or better
(NPO)
C510
100nF
C511
100nF
TP501
TONE_IN
TP500
TONE+CTCSS
GND
GND
D500
BAV99
D501
BAV99
-10V
+10V
+10V
VCC
24
GND
12
XTAL
1
XTAL/CLK
2
CS
7
ADDR
3
SCLK
5
Din
6
Dout
8
IRQ
4
AUDIO_IN
10
RX_IN+
14
RX_SUB_IN
16
TONE_OUT
9
AUDIO_OUT
11
COMP-
19
NO_TONE
22
Vbias
18
RX_IN-
13
RX_OUT
15
RX_SUB_OUT
17
COMP+
20
WAKE
23
COMP_OUT
21
U500
FX805
R512
10K
+5V
C503
100nF
C502
100nF
TONE_INT
R513
10K
+5V
R525
10K
L500
BLM31A601
+5TONE
R526
2K2
D503
BAV99
R527
47K
R528
47K
-10V
-10V
R529
47K
-10V
R531
7K5
R530
7K5
R533
7K5
R532
7K5
R534
NF
D502
BAV99
GND GND