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參數(shù)資料
| 型號： | MX805LH |
| 英文描述： | RF/Baseband Circuit |
| 中文描述： | 射頻/基帶電路 |
| 文件頁數(shù)： | 16/24頁 |
| 文件大?。?/td> | 532K |
| 代理商： | MX805LH |
Sub-Audio Signaling Processor
5.2.5.2.1 Command Word P
Page 16 of 24
MX805A
2001 MX-COM, Inc.
4800 Bethania Station Road, Winston-Salem, NC 27105-1201 USA
www.mxcom.com Tel: 800 638 5577 336 744 5050 Fax: 336 744 5054
All trademarks and service marks are held by their respective companies.
Doc. # 20480116.005
Bits
15
0
0
0
0
0
0
1
14
0
0
1
1
1
1
0
LSB
13
1
1
0
0
1
1
0
12
0
1
0
1
0
1
0
P
2
3
4
5
6
7
8
LPF Bandwidth
300Hz
200Hz
150Hz
120Hz
100Hz
85.7Hz
75Hz
Table 9: Valid Values of P
Bits 12 to 15 are used to produce the data word “P” as shown in Table 9. The cutoff frequency f
C/O
(0.5dB
point) of the TX Sub-Audio Lowpass filter is calculated as:
C/O
XTAL
.
XTAL
208.33
x
32
C/O
f
33
208
32
f
P
P
x
f
f
×
×
=
=
Table 9 is provided as and example and calculated using a Xtal/Clock (f
XTAL
) frequency of 4.00MHz. As
illustrated, only values of “P” of 2 to 8 are usable
5.2.5.2.2 Command Word Q
Bits 0 to 10 (See Figure 7) are used to produce the data word “Q” which sets one of the parameters described
below. As you can see, Command Word “Q” could be used to produce a parameter outside that specified in
the “Characteristics” section of this data bulletin. Care should be taken not to do this. Examples for limits of
“Q” in each operational configuration are included. “Q” = 0 is not valid in the following calculations. Bit 11 is
not used and must be set to logic “0”.
(a) CTCSS TX Tone Frequency (f
CTCSS
OUT
)
f
f
OUT
CTCSS
=
So “Q”
f
CTCSS
OUT
So “Q”
(b) NRZ TX Baud Rate (R
NRZ
TX
)
f
R
=
So “Q”
R
NRZ
TX
So “Q”
(c) NRZ RX Baud Rate (R
NRZ
RX
)
f
R
=
So “Q”
R
NRZ
RX
So “Q”
Hz
f
x
32
f
Q"
"
so
Hz
Q"
"
x
32
OUT
CTCSS
XTAL
XTAL
=
f
CTCSS
OUT
=
=
=
=
67Hz
1866
250Hz
500
“11101001010”
“00111110100”
TZ
NRZ
XTAL
R
XTAL
x
TZ
NRZ
x
32
f
Q"
"
so
bits/sec
Q"
"
32
=
R
NRZ
TX
=
=
=
=
67bps
1866
300bits/sec
417
“11101001010”
“00110100001”
RX
NRZ
XTAL
R
x
XTAL
x
11
x
32
RX
NRZ
352
f
Q"
"
so
bits/sec
Q"
"
=
R
NRZ
RX
=
=
=
=
100bps
114
300bits/sec
38
“00001110010”
“00000100110”
相關PDF資料 |
PDF描述 |
|---|---|
| MX806ADW | Audio Processor |
| MX806ALH | Audio Processor |
| MX806J | Audio Processor |
| MX806LH | Audio Processor |
| MX809LH | MODEM |
相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| MX806A | 制造商:CMLMICRO 制造商全稱:CML Microcircuits 功能描述:Audio Processor |
| MX806ADW | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Audio Processor |
| MX806AJ | 制造商:CMLMICRO 制造商全稱:CML Microcircuits 功能描述:Audio Processor |
| MX806ALH | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Audio Processor |
| MX806J | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Audio Processor |
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