FX375 Просмотр технического описания (PDF) - CML Microsystems Plc

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FX375

Private Squelch Circuit

CML Microsystems Plc 

Specification

Characteristics

Rx Clear

Total Harmonic Distortion

Output Noise Level

Passband Gain (300Hz – 3033Hz)

Passband Ripple (300Hz – 3033Hz)

Audio Stopband Attenuation

(ƒin > 3333Hz)

(ƒin > 3633Hz)

(ƒin < 250Hz)

Rx Invert

Carrier Frequency

Total Harmonic Distortion

Baseband Breakthrough

Carrier Breakthrough

Output Noise Level

Passband Ripple (300Hz – 3033Hz)

Audio Stopband Attenuation

(ƒin > 3333Hz)

(ƒin > 3633Hz)

(ƒin < 250Hz)

Tx Clear

Total Harmonic Distortion

Output Noise Level

Passband Gain (300Hz – 3033Hz)

Passband Ripple (300Hz – 3033Hz)

Audio Stopband Attenuation

(ƒin > 3333Hz)

(ƒin > 3633Hz)

(ƒin < 250Hz)

Pre- and De-emphasis

Tx Invert

Carrier Frequency

Total Harmonic Distortion

Baseband Breakthrough

Carrier Breakthrough

Output Noise Level

Passband Ripple (300Hz – 3033Hz)

Audio Stopband Attenuation

(ƒin > 3333Hz)

(ƒin > 3633Hz)

(ƒin < 250Hz)

Pre- and De-emphasis

See Note

3

7

3

3,8

7

8

3

7

3

3

3,8

7

3,8

8

8

8

Frequency Characteristics

Min.

Typ.

Max.

Unit

–

2

5

%

–

- 43

–

dB

–

0

–

dB

–

–

3

dB

–

20

–

dB

–

45

–

dB

–

42

–

dB

–

3333

–

Hz

–

4

10

%

–

- 40

–

dB

–

- 40

–

dB

–

- 37

–

dB

–

–

5

dB

–

50

–

dB

–

60

–

dB

–

60

–

dB

–

3

5

%

–

- 43

–

dB

–

0

–

dB

–

–

4

dB

–

20

–

dB

–

45

–

dB

–

42

–

dB

–

–

6

dB/octave

–

3333

–

Hz

–

4

10

%

–

- 40

–

dB

–

- 40

–

dB

–

- 37

–

dB

–

–

5

dB

–

50

–

dB

–

60

–

dB

–

60

–

dB

–

–

6

dB/octave

Notes

1.

2.

3.

4.

5.

6.

7.

8.

These values are obtained using the external integrator components as detailed in Figure 2.

An Emitter Follower output.

With an input signal of 1kHz @ 0dB.

Under Composite Signal test conditions.

Any programmed tone with RL = 600, CL = 15pF. Including any response to a phase reversal

instruction.

ƒo > 100Hz, (for 100Hz > ƒo > 67Hz : t = [100/ƒo (Hz)] x 250ms).

Input a.c. short circuit, audio path enabled, measured in a 30kHz bandwidth.

Due to frequency inversion, this figures reflects the difference from the expected ideal response.

8

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