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DATA
TECHNICAL
Manufacturer
SPAUN electronic GmbH & Co. KG, Germany
Web
www.spaun.com
E-mail
contact@spaun.com
Phone
+49-7731-8673-0
Fax
+49-7731-8673-17
Model
VAM 420 NG PAL
Function
VSB Twin Modulator
Number of analogue A/V inputs
2
Frequency range
110 … 862 MHz
TV standard
B/G/D/K/I/L
Output level max
90 dBµV
Output level adjustment
0...-10 dB
Spurious level
<-60 dB
C/N ratio
≥ 50 dB
Input level
1 ± 0.1 V p-p
Supply
12 V, 475 mA
Dimensions
196 x 106 x 35 mm
Jacek Pawlowski
TELE-satellite
Test Center
Poland
+
–
Min. level setting
Max. level setting
Channel
S03
67
S04
S05
69
Frequency [MHz]
119.25 839.25 126.25 133.25 855.25
Level [dBµV]
80.4 79.1 91.3 91.2 91.2
C/N [dB]
>55.7 >51.4 >57.1 >57.9 >61.8
V/A [dB]
15.1 15.7 17.4 18.1 15.4
72
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— 09-10/2012
— www.TELE-satellite.com
Excellent C/N ratio exceeding the
specified 50 dB.
Very good workmanship.
Versatile mounting options.
Cascadable with other identical units.
Easy programming.
None
Expert Opinion
clear – well over 50 dB above
the noise level. We tested
both maximum and mini-
mum amplitude settings and
performance at the low end
and the high end of the ter-
restrial frequency band. We
also checked how it worked
when two adjacent channels
were chosen to output the
analogue channels. We are
happy to inform that the per-
formance of VAM 420 NG PAL
was brilliant for all the set-
tings we tried.
To give you the idea how
great the performance was
let us provide you with a cou-
ple of measurement results.
See the table below. C/N
significantly exceeded the
specification (50 dB) for all
level and frequency settings.
Video to audio level ratio was
quite close to its nominal
value 16 dB. With such su-
perb performance, you can
connect the VAM 420 NG PAL
even to a very long coax ca-
bles without any fear of signal
degradation. This modulator
is really a top quality device.