Wireless Video Transmitters and Receivers with Audio by Coherent Communications

Professional Video & Motion Picture
Wireless Video-Audio / Time Code Systems


		WIRELESS VIDEO-AUDIO TRANSMITTER WITH INTERNAL TIME CODE READER/INSERTER Model CVT-1500

Note: See Model CVT-1400 for same Transmitter without Time Code Module

C V T - 1 5 0 0 F e a t u r e s

Transmitter Features

	Broadcast quality video (RS-250C)
	Rugged and light weight Aluminum case for maximum protection
	High quality locking connector for power, audio and time code
	10 User selectable channels; up to 4 may be in operation in the same area
	Use with our CVR-1500 Diversity Receiver for maximum reliability in portable applications.
	US / Canadian approvals under FCC part 15 & IC RSS-210 (Canada) or higher power for export versions.
	Works from a 12 or 24 Volt battery or AC adapter
	Great audio quality with both Microphone and Line level inputs available
	Microphone input also powers Electret microphones with built in peak audio limiter to prevent overload
	Convenient mounting bracket optional
	On / Off switch turns on indicator light to check battery and transmitter function
	Removable color coded plastic side panels to distinguish operating frequency used between multiple transmitter and receiver sets

CVT-1500 Time Code

	Linear Time Code Reader
	Vertical Interval Time Code Reader
	Vertical Interval Time Code Generator
	Versatile Window (Display) Generator
	Real time crystal controlled clock (time & date)
	The time, date & user information may be displayed as a window in the video picture. This information is also always encoded on the video signal. Once the video (and audio if desired), is recorded, the time, date and user data may be viewed with any standard Vertical Interval Time Code (VITC) Reader independently of the screen display.
	An internal clock generates a crystal controlled time & date signal that will continue to keep count even if the power is disconnected for several weeks. This time and date is automatically loaded into the display when the power is turned on.
	The CVT-1500 will read the standard SMPTE/EBU 80 bit time code typically present in professional level video equipment, and generate all the common frame rates. The internal generator will automatically lock to an external video source to provide proper synchronization.

Time Code controls

ON Turns the time/date display on and steps through:

a.	time display of hours, minutes, seconds & frames
b.	user information (such as Camera No., scene & take no. etc.)
c.	time display of hours, minutes & seconds (no frames)
d.	date
e.	display off

Size steps through 3 different size character sets, 2 colors & 3 backgrounds

Location positions the display in one of six locations on screen

4-6.	Time/Date Set Buttons for Hour, Minute, Second and Day, Month, Year
7.	Date Set sets date in any of the three international date formats
8.	Indicator light turns green once Set button is pushed. Flashes red if Frame Rate switch is changed after set button is pressed
9.	Frame Rate Switch selects proper video frame rate for black & white & NTSC or PAL
10.	Set Button once pushed, disables other buttons to prevent accidental changes
11.	Time Code / Audio switch determines if time code or audio will be transmitted over the CVT-1500's audio channel

C V T - 1 5 0 0 S p e c i f i c a t i o n s

TRANSMITTER
Operating Distance
1000 ft (305m) line of sight (US / Canadian version), more or less depending on conditions, antennas used, elevation, etc. Government & Export version will have considerably more range.

Operating Frequency
902-928 MHz in 10 user selectable channels. Up to 3 systems may be used in the same area simultaneously.

Transmission Type
FM, Crystal referenced, synthesized phase locked loop. Frequency controlled by microprocessor.

Frequency stability (-20 to +70º`C, -4ºF to +131ºF)		± 0.003%
Radiated power (US & Canadian version)		50 mVolts / meter @ 3m
Spurious & harmonic response		< 40 dBc

Video System		NTSC or PAL
Video level (internally adjustable)		1.0 Volt p-p into 75 Ohms
Impedance		75 Ohms
Video deviation		± 3 MHz (adjustable from ± 1 to ± 5 MHz)

Antenna US/Canada:		2.5 dBi gain. Flexible helical type (Rubber Duck)

Audio Modulation Type		FM
Maximum deviation		± 75 kHz
System signal to noise ratio at 75 kHz deviation		65 dBA
Pre & de-emphasis		75µ Second

Audio Input & Outputs		All dB figures referenced to 0 dB = 0.774Vrms
Microphone input level (full gain to minimum gain)		-37 dB to -6 dB for ± 75 kHz deviation
Microphone input impedance		2k Ohms
Power for Electret microphones (switchable)		+9 VDC @ 1mA max.
Line input (full gain to minimum gain)		-4 dB to +22 dB for ± 75 kHz deviation
Line input impedance		10k Ohms
Frequency response at 20 dB below full deviation		40 Hz to 15 kHz +1, -3 dB, 60 Hz to 10 kHz ± 1 dB (may be extended to -3 @ 30kHz.)
Total harmonic distortion (before limiting)		0.5% at 400 Hz (0.25% typical)

Audio Carrier Offset from Video		6.5 MHz

Power		12 VDC Nominal. See below for details.

Transmitted power levels, current consumption and maximum voltage

Type of Transmitter	Transmitted Power Levels	Current Consumption / Maximum Voltage
*US & Canada version*	*50mV / m @ 3m*	*265 mA / 30V Max*
Government & Export version	10 mW	285 mA / 30V Max
	100 mW	365 mA / 24V Max
	600 mW	650 mA / 16V Max

Mechanical
Size	3.7W x 4.2L x 1.2D in (93 x 107 x 31. mm)
With connectors	3.7W x 5.2L x 1.4D in. (93 x 131 x 37 mm)
Weight	11.4 oz (324g) & 11.6 oz (382g)

Connectors
Power, Audio & Time Code	Neutrik MiniCon 7 pin
Video IN	BNC 75 Ohm
Antenna	Reversed polarized TNC 50 Ohm (US/Canada) BNC 50 Ohm optional on Government/Export models

Environmental
Operating temperature	-20ºC to +60ºC (-4ºF to +131ºF)
Storage temperature	-40ºC to +70ºC (-40ºF to + 158ºF)
Humidity (non-condensing)	90%

Time Code Module Specifications

Video System	SMPTE or EBU (specify when ordering)
Video level	1.0 Volt p-p
Input Impedance	75 Ohms
Video Reference Crystal	14.31818 MHz ± 0.003% -20° to ± 60° C
Real Time Clock Crystal	32768 kHz ± 0.003% -20° to + 60° C
Clock operation	Approximately two weeks without power
Power	5 VDC (± 5%)
Current consumption	100 mA (Time Code circuit card without Transmitter)
Size (Circuit card only)	3 W x 4 L x 0.6 D in (76 x 102 x 15 mm)
Weight (Circuit card only)	1.4 oz (39 g)
Connectors	7 Pin header, 0.025 pins x 0.1 in. spacing

S-1510 includes:	1 CVT-1500 1 CVR-1000	Transmitter with antenna and connector Receiver with power supply, antenna, connectors, Pelican case and Manual
S-1515 includes:	1 CVT-1500 1 CVR-1500	Transmitter with antenna and connector Diversity Receiver with power supply, connectors, Pelican case and Manual

NOTE: Antennas for Diversity Receiver CVR-1500 must be ordered separately.

Approvals: FCC & Industry Canada No licensing required under FCC part 15.249 & IC RSS-210 for standard systems. Higher power systems transmitter has four power levels for Government or Export applications.

Specifications subject to change without notice.

MADE IN THE USA