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MaxHold:
MaxHold:
MaxHold:
MaxHold: In the Analog Mode, this can be used to “remember” the highest peak of the
RF signal.
MER:
MER:
MER:
MER: (Modulation Error ratio) This is usually expressed in dB. It is calculated from the
constellation pattern and represents how close the I and Q decision points are to the
ideal position. A typical MER value is 16 dB.
NIT:
NIT:
NIT:
NIT: (Network Information Table) One of the System Information (SI) tables in DVB
containing the current satellite name, position, and other data.
P
P
P
P----insert:
insert:
insert:
insert:
(Power Insert) This function is used for powering external, active accessories
(
such as
antenna amplifiers
) which require a power-source in order to operate. The
output voltage may be adjusted between 12 - 24 volt DC and is connected via the BNC-
connector. The selected outp
selected outp
selected outp
selected output voltage
ut voltage
ut voltage
ut voltage is
always
always
always
always
visible in upper-left-hand of the LCD-
display (next to the battery-symbol). The default setting of “P
“P
“P
“P –
––
– insert”
insert”
insert”
insert” is “Off
Off
Off
Off” (0 volt).
Warning !
Warning !
Warning !
Warning !
Mis
Mis
Mis
Misuse of this function may cause irreparable damage to all connected
use of this function may cause irreparable damage to all connected
use of this function may cause irreparable damage to all connected
use of this function may cause irreparable damage to all connected
equipment not intend
equipment not intend
equipment not intend
equipment not intende
ee
ed to accept or
d to accept or
d to accept or
d to accept or receive voltage !
receive voltage !
receive voltage !
receive voltage !
QPSK:
QPSK:
QPSK:
QPSK: (Quadrature Phase Shift Keying) This is a digital modulation used for all DVB-S
transmissions. The data is transmitted depending on the phase of the signal with 90
degrees the shift, so four states (one symbol) are encoded at each Symbol Frequency.
QPSK HD:
QPSK HD:
QPSK HD:
QPSK HD: DVB-S2 transmissions can be broadcast in either 8PSK modulation or QPSK
modulation, When the demodulator receives a DVB-S2 transmission in QPSK, then QPSK
HD” is displayed.
Res BW:
Res BW:
Res BW:
Res BW:
(Resolution Bandwidth) The resolution bandwidth shows the incoming signal
before
before
before
before
the measuring chip-set in the instrument. Choose between the
narrow 300 kHz
or
the
wider 1 MHz
resolution. The instrument is normally working in the ”auto
auto
auto
auto” mode and
the bandwidth chosen is shown on the spectrum display.
SNR:
SNR:
SNR:
SNR: (Signal to Noise Ratio) The SNR of a Signal is a measure of the quality of the signal
in dB and higher SNR is better. Typical SNR readings for a clean signal will be greater
than 10.0 dB. This is a measurement from the demodulator and is only valid when the
received signal is locked.
Vid BW
Vid BW
Vid BW
Vid BW:::: (Video Bandwidth filter) The
Video filter
is placed
after
after
after
after
the measuring chip-set
in the instrument, and is used in conjunction with various resolutions within a specified
bandwidth. The resolution of details on a
signal-carrier
is progressively refined in
relation to the narrowing of a filter (
sweep-time is increased
). The different Video
Video
Video
Video
filters
filters
filters
filters are: auto
auto
auto
auto----mode
mode
mode
mode (
default
), 100 kHz
100 kHz
100 kHz
100 kHz, 10 kHz
10 kHz
10 kHz
10 kHz, 1 kHz or 100 Hz.
1 kHz or 100 Hz.
1 kHz or 100 Hz.
1 kHz or 100 Hz. The bandwidth in use
is shown on the spectrum display.