Frame (DVB-S2/S2X)

Frame is a parameter group within the Frame Definition tab containing the following parameters:

Standard selects the DVB-S2 or DVB-S2X standard.

Default: DVBS2

Choices: DVBS2, DVBS2X

Symbol Rate sets the frame symbol rate in Hz.

Default: 300 MHz Megahertz: A unit of frequency equal to one million hertz or cycles per second.

Roll-off Factor sets the roll-off factor. Standard roll-off factors are α = 0.35, 0.25, 0.20, 0.15, 0.10 and 0.05 per ETSI European Telecommunications Standard Institute: The European standardization body for telecommunications. EN 302 307-1 [3], clause 5.6, although other values may be entered.

Default: 0.35

Physical Layer Signaling

Auto Detect Mode determines whether Physical Layer Signaling (PLSCODE) parameters are automatically detected or manually configured.

None - No auto detection is enabled, so all the Physical Layer Signaling parameters need to be manually configured and are assumed not to change over the measurement interval. PLSCODE metrics in the Syms/Errs trace will display a value of '***' since the information is manually entered and not auto detected.
Static - Physical Layer Signaling parameters are auto detected, but they are assumed not to change over the measurement interval. Detected PLSCODE information is displayed in the Syms/Errs trace.

If the signal has a low SNR Signal-to-Noise Ratio, this may lead to inaccurate PLS detection across frames. In such cases, the VSA will choose the most frequently occurring PLS code for demodulation and decoding. The Syms/Errs trace will show the frame with the highest frequency of detection within the measurement interval.
Dynamic - Physical Layer Signaling parameters are auto detected, and they can change frame by frame. If Dynamic is selected and VSA detects a different PLSCODE configuration over the measurement interval, all of the detected information will be displayed in the Syms/Errs trace.

Default: None

Choices: None, Static, Dynamic

FECFrame Type determines the FECFrame type.

Normal - Sets the FECFame size to Medium (64,800 bits)
Short - Sets the FECFame size to 32,400 bits (Short)
Medium - Sets the FECFame size to 64,800 bits (Medium)

Default: Normal

Choices: Normal, Short, Medium

MODCOD selects the S2X modulation as specified in Table 17a of the ETSI EN 302 307-2 V1.2.1 (2020-08) standard document.

Dummy
QPSK Quadrature phase shift keying-1/4
QPSK-1/3
QPSK-2/5
QPSK-1/2
QPSK-3/5
QPSK-2/3
QPSK-4/5
QPSK-5/6
QPSK-8/9
QPSK-9/10
8PSK-3/5
8PSK-2/3
8PSK-3/4
8PSK-4/5
8PSK-5/6
8PSK-8/9
8PSK-9/10
16APSK-2/3
16APSK-3/4
16APSK-4/5
16APSK-5/6
16APSK-8/9
16APSK-9/10
32APSK-3/4
32APSK-4/5
32APSK-5/6
32APSK-8/9
32APSK-9/10
QPSK-2/9
Pi/2-BPSK Binary phase shift keying - A type of phase modulation using 2 distinct carrier phases to signal ones and zeros.-1/5
Pi/2-BPSK-11/45
Pi/2-BPSK-1/3
Pi/2-BPSK-4/15
QPSK-13-45
QPSK-9/20
QPSK-11/20
8APSK(2/4/2)-100/180
8APSK(2/4/2)-104/180
8PSK-23/36
8PSK-25/36
8PSK-13/18
16APSK(8/8)-90/180
16APSK(8/8)-96/180
16APSK(8/8)-100/180
16APSK(4/12)-26/45
16APSK(4/12)-3/5
16APSK(8/8)-18/30
16APSK(4/12)-28/45
16APSK(4/12)-23/36
16APSK(8/8)-20/30
16APSK(4/12)-25/36
16APSK(4/12)-13/18
16APSK(4/12)-140/180
16APSK(4/12)-154/180
16APSK(4/12)-2/3
32APSK(4/8/4/16)-128/180
32APSK(4/8/4/16)-132/180
32APSK(4/8/4/16)-140/180
64APSK(16/16/16/16)-128/180
64APSK(4/12/20/28)-132/180
64APSK(8/16/20/20)-7/9
64APSK(8/16/20/20)-4/5
64APSK(8/16/20/20)-5/6
128APSK-135/180
128APSK-140/180
256APSK-116/180
256APSK-20/30
256APSK-124/180
256APSK-128/180
256APSK-22/30
256APSK-135/180
QPSK-11/45 Short
QPSK-4/15 Short
QPSK-14/45 Short
QPSK-7/15 Short
QPSK-8/15 Short
QPSK-32/45 Short
8PSK-7/15 Short
8PSK-8/15 Short
8PSK-26/45 Short
8PSK-32/45 Short
16APSK(4/12)-7/15 Short
16APSK(4/12)-8/15 Short
16APSK(4/12)-26/45 Short
16APSK(4/12)-3/5 Short
16APSK(4/12)-32/45 Short
32APSK(4/12/16)-2/3 Short
32APSK(4/12/16)-32/45 Short

Default: QPSK 1/4

Pilot Insertion enables or disables pilot insertion per ETSI EN 302 307-1, clause 5.5.3.

Default: Enabled