UNAOHM
30
EP2500 (Rev. 0)
1.
Poor or excessive burst amplitude at 4.43 MHz indicates a problem in synchronizing the colour
burst (the most probable cause is a misalignment of channel amplifiers).
2.
Sync peak compression indicates an overload in one of the amplification stages (generally the power
amp section).
3.
If ripples or distortions are observed on the sync signal, there will probably be patterns on the
screen.
4.
The presence of background noise may be perceived, faster and more easily than on a TV set.
5.
For analogue satellite signals the sync pulse amplitude will be directly proportional to the channel
frequency deviation.
To disengage the sync pulse mode press one of the multifunction keys
(4)
.
7.17
MONITOR FUNCTION
To engage the monitor function press the key
MENU (20)
mark EXTERNAL by means of the Shaft
Encoder and press
ENTER
.
To return to the normal operating function press
BACK
.
The SCART socket is the video and audio signal input (see section 7.21 too, USE OF THE SCART
SOCKET).
7.18
USE OF THE PROGRAM MEMORIES
The instrument is equipped with 100 program memories (from 0 to 99).
Each program contains:
•
Tuning frequency.
•
Channel (if available).
•
TV-standard.
•
Video SAT signal polarity.
•
22 kHz tone status.
•
Power to the LNB.
•
Two SAT Audio subcarrier frequencies.
•
SAT audio bandwidth and deemphasis.
•
Resolution bandwidth.
•
The type of demodulator used in the measurement mode.
•
One of the DiSEqC commands.
NOTE:
For safety purposes, the LNB voltage is not reinserted by recalling a program, not even if it
was operative at the time of storage.
To store just press the key
↓↓
STORE (30)
twice; the program stored is the one currently indicated on
the display.
By means of the utility routines (see section 8) it is possible to:
•
Cancel specific programs.
•
Cancel all the programs stored.
Suggestion:
assign the signal to store a program location number (by pushing key
PR)
before
tuning,
and setting the other parameters of, that signal. This way you avoid overwriting a new program in a
location which has already been used for program storing. For memory recall see section 7.6 on tuning.
7.19
SPECIAL MEASUREMENTS
Access to three special measurements is possible through the
EXP
and
MEA
functions:
