BM450 DSB modulator for S-channels
Technical manual
0504
6130
Technical specifications
HF
Frequency Range: 245.25 - 463.25 MHz (S13-S41)
Output level:
min 92 dB
µ
V
Frequency Range with reduced
output level: 455.25 - 463.25 MHz (S40 and S41)
Output level:
min 90 dB
µ
V
Spurious output:
<-60 dBc
Harmonics:
<-60 dBc
Attenuation adjustment:
0 - 20 dB
Output impedance:
75 Ohm
Video
Impedance:
75 Ohm
Level:
nominal 500 mV
pp
Audio
Impedance:
>10 kOhm
Level:
nominal 500 mV
rms
Misc.
EMC:
EN 50083-2
Operation temp.range:
-40 - +60
o
C
Supply voltage:
24 V DC ± 10%
Current consumption:
100 mA (approx)
Size (mm):
(H) 210 x
(W) 41X (D) 96
Weight:
0.55 kg
Order No:
250.145
© Copyright 2003 Naval Electronics AB
BM450
0-20 dB
0-20 dB
x1
x1
MHz
MHz
Audio
udio
x10
x10
MHz
MHz
x100
x100
MHz
MHz
0
0
0
0
1
1
1
1
2
2
2
2
3
3
3
3
4
4
4
4
5
5
5
5
6
6
6
6
7
7
7
7
8
8
8
8
9
9
9
9
RF out
RF out
Audio
in
Video
Video
in
Video
Video
Le
Level
el
Audio
udio
Le
Level
el
Naval’s new double side band S-channel TV modulator
BM450 is designed for operation in the frequency range
of 245.25-463.25 MHz in PAL B/G, D/K, I, and NTSC
M/N systems. High adjustable output level is significant
for this unit. The modulator is equipped with two
individual input level adjustments for video and audio
signal.
BM450
0-20 dB
0-20 dB
x1
MHz
MHz
Audio
udio
x10
MHz
MHz
x100
MHz
MHz
0
0
0
0
1
1
1
1
2
2
2
2
3
3
3
3
4
4
4
4
5
5
5
5
6
6
6
6
7
7
7
7
8
8
8
8
9
9
9
9
RF out
RF out
Audio
in
Video
Video
in
Video
Video
Level
Audio
Level
A
B
C
D
E
F
G
H
I
J
Controls front panel
A - RF out, TV signal from modulator.
B - Attenuator control.
C - Audio, adjust the audio subcarrier.
Pos.
Frequency
System
0
4.5 MHz
M/N, NTSC
1
5.5 MHz
B/G, PAL
2
6.0 MHz
I, PAL
3
6.5 MHz
D/K, PAL
4
-
-
5
5.5 MHz + Testbars
Positions 6 to 9 not used.
D, E and F - The output frequency is
adjusted with three switches x100
representing 100 MHz steps, x10
representing 10 MHz steps and x1
representing 1 MHz steps. Eg. for setting the
frequency to channel 13 (245,25 MHz) the
switches should be set as follows:
x1
5
(5x1 MHz)
x10
4
(4x10 MHz)
x100 2
(2x100 MHz)
G - Audio, adjust the audio input level.
H - Audio signal in from e.g. VCR.
I - Video, adjust the video input level.
J - Video signal in from e.g. VCR.
Installation
The module can be installed into a cabinet or
separately. The supply voltage is fed from the power
supply to the unit by loop-connecting the supply
cable from module to module. When combining the
signals to a CAS 3000 system special precaution
needs to be taken to avoid interference with terres-
trial signals.
Dimensions
Mounting depth
required with
cables: 155 mm
Connectors
Video in: RCA connector female, pict. (A)
Audio in: RCA connector female, pict. (A)
RF out: 75 Ohm BNC female
DC connector: Upper gable, pict. (B)
DC
connector
Naval Electronics AB
Höjdrodergatan 18, SE-212 39 Malmö, Sweden
Tel. +46(0)40-29 20 45. Fax +46(0)40-18 74 13
E-mail:sales@naval.se www.naval.se
B
A
RCA
connector
(Phono plug)
