Harmonic ProView 2900 Installation Manual page 92

Chapter 6: Receiver Configuration Modules
Freq Drift Compensation
6.2.1.7.
The ProView 2900 uses Freq Drift Compensation to automatically correct inaccurate
frequencies set by the operator.
When the operator sets the receiver frequency, the ProView 2900 checks whether it is set to
the optimum frequency. When a deviation is detected, the ProView 2900 calculates the offset
from the original setting and enables correcting it.
Turning on the Freq Drift Compensation activates the automatic frequency adjustment. When
Drift compensation is turned off, the device uses the original frequency setting that was
inserted by the operator.
This feature also enables the receiver to follow the drifts of the LNB.
The following figure illustrates the Freq Drift Compensation screen.
1 1 1 1
2 2 2 2
The available options are:
OFF – Drift Compensation is off; the receiver remains with the configured frequency.
•
ON - Drift Compensation is on; the receiver adjusts its optimal frequency.
•
LNB L.O. Type
6.2.1.8.
The LNB L.O. Type parameter defines the LNB oscillator type in use.
Two standards are generally used:
LNB 'Universal' standard, in the 9.75 to 10.6 GHz, or the LNB Universal 'Wide Band', in
•
the 9.75 to 10.75 GHz range.
Digital Sattelite Equipment Control (DiSEqC) standard, in the 9.75 to 10.6 GHz range.
•
In addition, the oscillator value can set to Ku Band or C Band and be manually configured
(using the .
The following figure illustrates the LNB L.O. Type screen.
1 1 1 1
2 2 2 2
3 3 3 3
4 4 4 4
5 5 5 5
NOTEs
The LNB L.O. type can be acquired from satellite transponder information. Most satellites use
the 'Universal' type of L.O. unless otherwise specified.
Manual configuration of the oscillator frequency is rarely used and is intended only for
advanced users.
© Harmonic Inc. Manual p/n 101543/Ver 1.0
Freq Drift Compensation Freq Drift Compensation Freq Drift Compensation Freq Drift Compensation
OFF OFF OFF OFF
ON ON ON ON
LNB L.O. Type LNB L.O. Type
LNB L.O. Type LNB L.O. Type
UNIVERSAL (9.75,10.6) UNIVERSAL (9.75,10.6) UNIVERSAL (9.75,10.6) UNIVERSAL (9.75,10.6)
WIDE BAND (9.75,10.75 WIDE BAND (9.75,10.75) ) ) ) WIDE BAND (9.75,10.75 WIDE BAND (9.75,10.75
Ku BAND Ku BAND Ku BAND Ku BAND
C BAND C BAND C BAND C BAND
DiSEqC (9.75, 10.6) DiSEqC (9.75, 10.6)
DiSEqC (9.75, 10.6) DiSEqC (9.75, 10.6)
Satellite Receiver Configuration
6-7 ProView 2900 Series/SW Version 1.94