CMX808AE3 Просмотр технического описания (PDF) - MX-COM Inc

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CMX808AE3

Family Radio Service CTCSS Processor

MX-COM Inc  

Family Radio Service CTCSS Processor

10

Bits

Audio

4 3 2 1 0 Attenuation

10000

24.0dB

10001

22.4dB

10010

20.8dB

10011

19.2dB

10100

17.6dB

10101

16.0dB

10110

14.4dB

10111

12.8dB

11000

11.2dB

11001

9.6dB

11010

8.0dB

11011

6.4dB

11100

4.8dB

11101

3.2dB

11110

1.6dB

11111

0dB

Table 9: AUDIO ATTENUATION

CMX808A Preliminary Information

4.1.2.4 CTCSS TX FREQUENCY Register (Hex address $83)

This is a 16-bit register. Byte (1) is sent first. When the CTCSS transmitter is enabled, the bits 0 to 12 control

the frequency of the transmitted CTCSS tones according to the formula below.

A

=

fXTAL (Hz)

16 x fTONE (Hz)

where A is the binary number programmed into the 13 bits.

When Bit 7 (in the first 8 bits) is set to "1" the tone output is set at VBIAS or NOTONE without regard to the

number "A" programmed. When Bit 7 is "0" the programmed tone is set on the output. Programming bits 0 to

12 to "0" sets the output to VBIAS. Powersave is achieved by disabling the Tx (Bit 7 in the SUB-AUDIO

CONTROL register $80).

©1999 MX-COM, Inc.

www.mxcom.com tel: 800 638 5577 336 744 5050 fax: 336 744 5054

Doc. # 20480199.002

4800 Bethania Station Road, Winston-Salem, NC 27105-1201 USA

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