DFME Technical Characteristics
 

General Characteristics

 

Storage temperature

- 40°C to 70°C

Operating temperature

 0°C to 55°C

Maximum relative humidity
(non condensing)

85 %

Power supply

220 V ± 10 % AC @ 50 Hz

RF characteristics

Output power

30 W

Output impedance

50 W

Output connector

BNC

Maximum permitted VSWR

30 : 1

RF harmonics and spurious level

< - 70 dB

Emission class

F3, frequency modulation

Modulation type

Digitally generated FM using 32 bits NCO

Frequency range

87 MHz to 108 MHz

Frequency control

Frequency synthesizer – PLL

Channel resolution

50 kHz

Reference frequency

66 MHz

Frequency stability

± 500 Hz / 6 months

Modulation capability

180 % (± 75 kHz reference standard)

Audio input impedance

600 W balanced or unbalanced

Audio level for 75 kHz deviation

6 dBm

Audio level adjustment

- 8 dBm to 6 dBm

Digital audio format

AES / EBU, fS 32 kHz to 50 kHz

Pre-emphazis

50 ms

Amplitude response

± 0.05 dB, 0 to 53 kHz

± 0.15 dB, 53 kHz to 100 kHz

THD (mono)

< 0.02 %

THD (stereo)

< 0.04 %

FM S / N ratio (de-emphasis, mono
50 mS)

> 76 dB

FM S / N ratio (de-emphasis, stereo
50 mS)

> 74 dB

FM S / N ratio (de-emphasis, “A” curved mono)

> 82 dB

FM S / N ratio (de-emphasis, “A” curved stereo)

> 80 dB

Stereo channel separation

> 50 dB

Audio signal suppression (19 kHz)

> 70 dB



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