COBHAM H264ENC Betriebsanweisung PDF herunterladen (Seite 112)

SOLH264TX Broadcast Transmitter

H264TX, H264ENGTX, H264ENC

UNCLASSIFIED

Part A - User Guide

DS000091

Rev 1.2 2013-05-02

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Page 13-102

 In the Unit Information tab the Chaining field said ‘Not Active’ instead of active and

my relay didn’t work.

 You must press the Apply button after you select Relay.

You may need to press the Refresh button when you switch to the Unit Information tab.

Is the ASI stream connected to the correct port on the transmitter? (ASI IN, not ASI

OUT).

Is the ASI stream really running? The caption will only switch to Active if Relay is set

correctly and there is an ASI stream available at the input port of the transmitter.

Note: In this example I have used a receiver which is demodulating an off-air signal and

passing the ASI stream to the transmitter to relay onwards.

Naturally, you could use

any

ASI source to replace the receiver in my example.

The only rule is: The ASI bit rate must be less than the modulation bit rate.

13.12 Setting up Chaining Mode

The chaining mode allows two or more services to be combined.

For example, a system can be configured to carry two video signals using only one RF

link. One transmitter modulates the RF output; the second transmitter is used as an encoder

only. Naturally, this arrangement needs to divide the two video signals equally in bit rate.

CAUTION: For chaining mode to operate correctly, the RF transmitter unit in the chain must

operate at twice the transmit bit rate of the encoder only transmitter unit.

The units must have:

 Different Chaining Numbers

 Different Unit Names

Before you Begin

You’ll need:

 At least one Receiver.

 Two SOLH264TX Transmitters each configured to accept an SD video source.

 A video source for each transmitter (I’m using SD in my example)

 A Chaining Cable (ASI Cable).

 A PC with the Transmitter Controller software loaded.

 A CA0343-2 USB to Lemo communications cable.

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COBHAM H264ENC Betriebsanweisung Seite 112