Harmonic SUPRALink 7110-E Series, Руководство по установке, Страница: 25 / 38

Chapter 4 Transmitter Setup Setup via HLP 4200 and HLP 4800 Display
© 2009 Harmonic Inc. 25 SPL 7110- Exx, Version 1.0, Rev A
4. Verify that the RF input signal has been properly connected to the transmitter. See
Section
2.4 Connecting the RF Broadband Input on page 15.
5. On the HLP 4200 and HLP 4800WD, press the
Esc
button until the display reads
MODULE
SELECTION
, then press
Enter.
6. Press the
▲
or
▼
button until the display indicates the transmitter module you wish to set
up, then press
Enter.
7. Press
▲
or
▼
until the display reads
TRANSMITTER SETUP
, then press
Enter.
The
message appears,
RUN AUTOSETUP? YES <SET+UP/DN> TO CHOOSE
.
8. Hold down the
Set
button and press
▲
or
▼
until the value you want is displayed—
YES
to
run Autosetup or
NO
to skip Autosetup—then press
Enter.
For details of the Autosetup
feature, see Section 4.3.1.. If you choose
NO
to Autosetup, skip to Step 9.
9. The message appears,
AGC CONTROL <SET+UP/DN> FOR AGC.
Hold down the
Set
button and press
▲
or
▼
until the value you want is displayed—
AGC
or
MGC
— then press
Enter.
For details of the AGC feature, see Section 4.3.2 Automatic Gain
Control and Manual Gain Control .
10. To exit the Transmitter Setup menu, press
Enter
.
4.4.2 Setting Fiber Length
To adjust the fiber length of the chirp CSO precompensation parameter:
1. Press ESC until the HLP Platform display reads MODULE SELECTION. Press Enter.
2. Press
▲
or
▼
until the display indicates the SPL7110-EXX module you wish to set up.
Press Enter.
3. Press
▲
or
▼
until the display reads TRANSMITTER SETUP. Press Enter.
4. Press
▲
or
▼
until the display reads TRANSMISSION DISTANCE = XX.X km <SET+UP/
DN>
To change the values.
■
Hold down the Set button, and press
▲
or
▼
until the fiber length is set closest to the
actual fiber length in the SPL7110-EXX path.
4.4.3 Fine-Tuning the Transmitter
The setup instructions described in Section 4.4.1. will normally bring the transmitter to
optimal operating conditions. Harmonic recommends fine-tuning each transmitter to your
specific requirements and preferences.
If the factory-optimized RF level is not suitable for your particular application, you can use the
following procedure to adjust the internal RF pad.
You can adjust the RF level while in either AGC or MGC mode. See the appropriate section.
Pad adjustment does not alter the current mode of operation (AGC or MGC).
For details of the results of the RF adjustment, see Section 4.2 Fine-Tuning Each Transmitter
on page 23.
To adjust the RF level via the HLP push buttons and display:
1. Press the
▲
or
▼
button until the display reads
MODULE SELECTION
, then press Enter.
2. Press
▲
or
▼
until the display indicates the transmitter module you wish to adjust, then
press Enter.
3. Press
▲
or
▼
until the display reads
TRANSMITTER ADJUSTMENTS
, then press Enter.