Bộ điều chế Agile Modulator Vinasa VNS-78D

Điều chế Agile Modulator VINASA  VNS-78D

Reliable,durable & easy to operate
Superior spurious harmonic output
45.00-870.00MHz(920MHz)
bus-mastering
GaAs Component used
I2C
VNS-78D  Intelligent Adjacent Channel Modulator

Front panel control board to adjust frequency,
modulation level, A/V ratio, stability etc. through
the LCD by tuning keys.

Specification

RF
Frequency range	45.00MHz to 870.00MHz
Frequency stability	5KHz
Agile stepping	250KHz
Output level	113 dBuv (Max)
Level adjustable range	20dB
Output Impedance	75 Ohm
Spurious Output	-62dB
Output return loss	14dB
C/N in band	70dB min 65dB
out-of-band	65dB min 62dB)
Differential phase	2.5 0
Chrominance luminance delay	40nS
Modulation level	87.5%
	1 32 levels adjustable
IF
IF/picture output frequency	38.00MHz
IF/pucture output level	85dB V
Aural IF frequency	31.5MHz
A/V carrier ratio	-10 to -20dB
Video
Standard Video input level	1.0V p-p
Input Impedance	75Ohm
Visual S/N	53dB
Video response	1.0dB
Differential gain	2.5%
Audio
Input level range	+5 to +25dBmV
Input impedance	>10k Ohm
Frequency response	1.0dB
Aural S/N	55dB
Distortion	0.4%
Video/audio separation	6.5MHz 500Hz
Maximum sound deviation	50KHz
Audio modulation deviation	1 32 levels adjustable
Pre-emphasis	50 s
General
Power	220v/60Hz.AC
Dimension	19"(W) 12.6"(D) 1.75"(H)
Operating temperature	-10 0C ~ +40 0C
Weight	about 3.5KG