CMX264 Просмотр технического описания (PDF) - MX-COM Inc

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CMX264

Frequency Domain Split-Band Scrambler

MX-COM Inc  

Frequency Domain Split-Band Scrambler

13

CMX264 Advance Information

6.1.3 Operating Characteristics

For the following conditions unless otherwise specified:

Xtal Frequency = 4.433619MHz, Noise Bandwidth = 25kHz.

VDD = 3.0V, TAMB = - 40°C to +85°C.

Input Signal 0dB = 250mV (Tx Channel), 100mV (Rx Channel) @1kHz, scramble mode selected.

Neither pre nor de-emphasis enabled.

Typical radio channel filtering employed between transmitting (scrambling) and receiving (descrambling)

device (such as shown in Figure 8).

DC Parameters

VDD

IDD (powersaved)

IDD (not powersaved)

AC Parameters

Tx Channel

Audio In (MICIN)

Input Impedance

Signal Level

Audio Baseband Signal Lower 3dB Point

Audio Baseband Signal Upper 3dB Point

Scrambled Audio Out (MICO)

Scrambled Spectrum Lower 3dB Point

Scrambled Spectrum Upper 3db Point

Scrambled Spectrum Signal Level at 4000Hz

Tx Channel Passband Gain

Output Impedance (output active)

Output Impedance (output not active)

Any Spurious Output

Noise and Distortion

Rx Channel

Scrambled Audio In (RXIN)

Input Impedance

Signal Level

Audio Out (RECO or EXTO)

Recovered Spectrum Lower 3dB Point

Recovered Spectrum Upper 3dB Point

Rx Channel Passband Gain

Output Impedance (output active)

Output Impedance (output not active)

Any Spurious Output

Noise and Distortion

Pre-emphasis Filters

Slope

Gain at 1kHz

Notes Min. Typ. Max.

2.7

3.3

1

0.3

1

3.0

Units

V

mA

mA

100

kΩ

250 1000

mVRMS

2

230

Hz

2

2700

Hz

2,3

230

Hz

2,3,4

3200

Hz

2,3,4

-26.0

dB

2,3,4,5

-1.0

dB

6

1.0 2.5

kΩ

6

300 500

kΩ

7,8,9

-40.0

dB

7,9,10

2.0

%

100

250 1000

kΩ

mVRMS

2,11

230

Hz

2,11

2700

Hz

2,11,12

-2.0

dB

6

1.0 2.5

kΩ

6

300 500

kΩ

7,8

-30.0

dB

7,10

4.0

%

13

6.0

dB/Octave

0.7

dB

2000 MX-COM, Inc.

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

Doc. # 20480210.002

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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