IMT VSTx, User Manual

Page: 43 / 50

VST
X
User Manual
Revision 2. 3 43
5.4 Using the VST
X
to Transmit Audio and Video Signals
The VST
X
uses a COFDM modulation scheme. Receiver systems used with the V ST
X
must be
compatible and capable of receiving the type of video transport streams transmitted by the VST
X
.
Compatible receivers include the IMT VSRx receivers and certain other IMT products. Contact IMT
for more information.
5.4.1 Select User Level Settings
By use of the available interface(s), make appropriate settings so that your transmitter and suitable
receiver are on the same RF and modulation settings.
5.4.2 Put the unit in Transmit Mode
Via the Remote Control, place the unit in to TX mode
NOTE: When no video signal is present, the unit enters “Standby Mode.” When a video signal is
present, the unit automatically exits “Standby Mode” and resumes transmission. Depending on unit
type, Standby mode status may be indicated by a front panel LED.
5.4.3 Select Power Level
Use the remote control to select the power level desired (HI / LOW). In HI mode, the unit will output
its full rated power. In LOW mode, the output will be approximately 6dB down from the HIGH
power output.
5.4.4 Verify Operation
Verify unit operation by one of the following methods:
(1) If your system contains a host processor capable of communicating with the unit via the serial
interface, use interrogation commands to check the status of the unit.
(2) Detect the transmitted signal using a spectrum analyzer.
(3) Using an appropriate receiver, verify that you are receiving audio and video from your
application setup.
5.5 Using the VST
X
To Transmit User Data (Ribbon version only)
The User Data Interface can be used to packetize user data along with the main audio and video
information. The User Data can be received and output by compatible IMT receivers. The user data
interface must be programmed using the serial interface.