Modulators

FEATURES AND SPECIFICATION

  • Superior vestigial sideband filtering for adjacent channel systems
  • Low spurious harmonic output
  • Highly accurate crystal controlled oscillator
  • 5 digits LED on Front panel
  • Front panel keys for adjusting frequency, modulation level,
  • A/V ratio, volume, RF signal level
  • -25 dB test point on Rear panel
  • GaAs Component used for N3282
  • System: PAL-B/G/D, NTSC

Model

N3151

N3182

N3282

RF

output

Frequency range (MHz)

47-550

47-860

45-860

Frequency stability (KHz)

10

10

5

Tuning step (KHz)

// /

/

250

Output level (dB V)

100

105

108

Output level adjustable (dB)

0 to -20

0 to -20

0 to -20

Output return loss (dB)

14

14

13

Spurious output (dB)

-62

-62

-60

C/N Ratio in Channel (dB)

65

65

65

Audio/ video carrier ratio adjustable

-10 to C20 dB

/

Output impedance ( )

75

75

75

Video

section

Standard input level (V p-p)

0.5

0.5

1.0

Input impedance ( )

75

75

75

Video S/N ratio (dB)

53

60

50

Video Response (dB)

1.0

1.5

1.5

Differential Gain

<3%

<3%

2.5%

Differential Phase

<3

<3

2.5

C/L delay Inequality

40nS

40nS

40nS

Video modulation level adjustable

/

/

1-32

Audio Section

Input level range (dBmV)

+5 ~ +25

+5 ~ +25

+5 ~ +25

Input impedance ( )

>10k

>10k

>10k

Frequency response (dB)

1.5

1.5

1.5

Audio S/N (dB)

55

55

52

Audio distortion

1.0%

1.0%

0.4%

Audio Frequency

6.50,6.00,5.50,4.50 MHz Optional

Pre-emphasis

50s

50s

50s

Audio Level Adjustable

/

/

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