NTSC Video/Audio Transmitter Series VT40

NTSC Video/Audio Transmitter Series VT40
NTSC Video/Audio
Transmitter
Series VT40
Features
1.7-1.9, 2.2-2.4, 2.4-2.5 GHz
0.25/2 Watts
Dual Audio/Data Subcarriers
Fixed or Agile Frequency
FCC Part 90 Type-Accepted
Description
The VT40 series of broadcast quality, 0.25/2 watt video/audio
transmitters are designed to transmit black and white or color video
signals in the frequency bands covering 1.7-1.9,2.2-2.4,or 2.4-2.5
GHz. The VT40 design includes a dual audio/data sub-carriers.
This transmitter is true FM, modular, all solid state and is protected for
operation into any VSWR, without damage, including open or short
circuits.
Rugged construction, minimum size and light weight make this
transmitter ideally suited when operation in harsh conditions is
required. Transmitters may be ordered as fixed frequency or any
number of channels in a given band, spaced in 0.5 Mhz increments.
The VT40 comes with an 100-240 VAC to 12 VDC power converter.
The VT40 video transmitter comes with SEMCO’s 2-year warranty on parts and
labor.
Systems Engineering &
Management Company
1430 Vantage Court
Vista, CA 92081
For Further Information Call
(800) 995-0636, Ext.1126
FAX (760) 727-5200
www.semco.com
Technology & Innovation For A Safer World
April 2011
Specifications
Series VT40
ELECTRICAL SPECIFICATIONS
Frequency Range
Frequency Selection
Frequency Stability
Output Power
Output Impedance
Spurious & Harmonic Emissions
1.7-1.9, 2.2-2.4, or 2.4-2.5GHz
Fixed frequency or Multi-channel
+ 0.005%
0.25/2 Watts
50 ohms (nominal)
< -60 dBc
VIDEO MODULATION SECTION
Type
Input Impedance
Frequency Response
Carrier Deviation
Deviation Sensitivity
Linearity
Incidental AM
Incidental FM
Pre-Emphasis
Horizontal Resolution
True FM
75 ohms nominal
10 Hz to 4.5 MHz +1.5 dB
+ 4 MHz peak
+ 4 MHz/Vp-p, factory set, adjustable
+ 2% BSL
2% maximum
+10 kHz maximum
Per CCIR-405
> 480 lines
SUBCARRIER MODULATION SECTION
Subcarrier Type
Subcarrier Number
Subcarrier Frequency
Frequency Response
Harmonic Distortion
Audio Pre-Emphasis
Audio Input
Mic Bias
Input Impedance
Peak Deviation
Incidental FM
Audio/Data
Dual
5.5-7.8 MHz (6.5 MHz standard)
Audio: 25 Hz to 12 kHz
Audio: <2%
Per CCIR-405
Mic level, 8 mVp-p at 400 Hz
1.5 VDC
600 ohms for line level, 4K ohms for mic level
+75 kHz
+ 5 kHz
ENVIRONMENTAL SPECIFICATIONS
Temperature
-20 to +40 degrees C (operating); -40 to +70 C (storage)
POWER REQUIREMENTS
Input Voltage
Input Current
Reverse Polarity
10-18 VDC
0.3 amps @ 250 mW output; 0.8 amps @ 2 W
> 20 VDC
CONNECTORS
Video Input
Audio, Power Inputs
RF Output
BNC (F)
15 pin micro D
SMA female
MECHANICAL
Size
Weight
3.0 x 2.0 x 1.0 inches (6 cubic inches)
6 ounces
.
Systems Engineering &
Management Company
1430 Vantage Court
Vista, CA 92081
For Further Information Call
(800) 995-0636, Ext.1126
FAX (760) 727-5200
Www.semco.com
Technology & Innovation For A Safer World
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