Chapter 6 - SAT Measuring Range
47
106 V3.2
6.4.5.2
Operation
The JESS control can be used to convert 32 SAT-IF layers in a maximum of 32 UB slots. These
are further divided into 8 satellite positions with 4 SAT-IF layers each. Each connected receiver
(maximum of 32) operates using a dedicated UB slot. This is defined via the UB number.
These JESS control parameters are set via
LNB -> SAT-IF-Layer
,
LNB -> Satellite
and
LNB -> UBs
.
The measuring receiver is tuned as described in the chapter 6.1 - Frequency input.
The difference when using the JESS control is that the desired transponder frequency is converted
to the center frequency of a UB slot in the converter unit.
That means that the measuring receiver must send the transponder frequency to the converter unit
as a JESS command and then tune itself to the correct UB slot center frequency.
Whenever there is a new tuning process, the entire JESS control command is sent to the CSS
(Channel Stacking Switch) again. Because JESS enables the use of up to 32 receivers connected
to one cable, clashes may occur between the connected receivers during control. If this situation
arises when using the measuring receiver, send the control command again by pressing the
HOME
and
ENTER
key combination.
Note!
In the JESS operating mode, the scan function is deactivated. In general, JESS
components are backwards compatible and can also understand conventional
EN50494 commands. If the expanded features of JESS are not required,
UNICABLE control can also be used.
6.4.5.3
Reading UB slot frequencies from CCS
In contrast to UNICABLE, where the UB configuration is indirectly determined using a scan
function, JESS allows the number and center frequencies of the available UB slots to be read out
from the CSS unit using DiSEqC commands. This makes the process significantly faster.
With JESS control active, select
LNB -> scan UBs
and press
ENTER
the number of available UB
slots on the connected converter is determined, and they are displayed along with their center
frequencies.
Figure 6-23 JESS: Reading UB slots frequencies from CSS
In the example above, 8 UBs are determined, the UBs 3 to 6 are blocked by a programmable wall
outlet. The UB slots marked with “----” have no function. Press
ENTER
at
replace UBs
to store the
frequencies to the UBs in the none volatile memory of the instrument.
