CMX635L4 查看數據表（PDF） - MX-COM Inc

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CMX635L4

ISDN Subscriber Processor

MX-COM Inc  

ISDN subscriber Processor

1.2 Analog Block Diagram

Page 6 of 88

CMX635 Advance Information

Notes:

G1 =

G2 =

G3 =

G4 =

G5 =

Figure 2: Analog Block Diagram

0dB to 22.5dB ( in 1.5db steps) -

Level set/AGC gain.

0dB to –42dB (in 3dB steps + mute) - Speakerphone attenuation.

+6dB to –42dB (in 0.5dB steps + mute) - Speaker/ring output gain.

0dB to –42dB (in 3dB steps + mute) - Tone gain

-6dB to –36dB (in 2dB steps) -

Sidetone gain.

S1 – S8

=

User selectable switches.

IS1

=

Internally operated switches (shown for information only).

T1 - T2

=

Test Switches (shown for information only).

At reference points “A” and “B” the nominal signal level scaling as defined in ITU-T G714 is:

0dbm0 ≡ 0dBm = 775 mV r.m.s. at 5V power supply.

The maximum unclipped sine wave possible on reference points “A” and “B” is:

3.14dbm0 ≡ 3.14dBm = 1.11 V r.m.s. for A law companding at 5 V supply.

Peak to peak full scale input signal to Rx Codec is 0.986 x VDD for A-law companding,

And 0.989 x VDD for µ-law companding.

2001 MX-COM, Inc.

www.mxcom.com Tel: 800 638 5577 336 744 5050 Fax: 336 744 5054

Doc. # 20480225.002

4800 Bethania Station Road, Winston-Salem, NC 27105-1201 USA All trademarks and service marks are held by their respective companies.

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