Protocol analysis
R&S
®
RTP
585User Manual 1337.9952.02 ─ 12
Threshold
Sets the threshold value for digitization of the signal. If the signal value on the line is
higher than the threshold, the signal state is high. Otherwise, the signal state is consid-
ered low if the signal value is below the threshold. The interpretation of HIGH and LOW
is defined by the Polarity.
There are several ways to set the threshold:
●
"Threshold"
Enter the value directly in the field.
●
"Autoset"
Starts software algorithms for determining the signal threshold levels and bitrate.
●
"Find thresholds"
Executes the measurement of reference levels and sets the thresholds to the mid-
dle reference level of the measured amplitude.
Note: If the sources are digital channels, the same threshold values are used for the
parallel and the serial buses. You can set the thresholds either in the parallel bus con-
figuration or in the serial bus configuration.
Remote command:
BUS<m>:LIN:DATA:THReshold on page 1657
BUS<m>:LIN:TECHnology on page 1658
BUS<m>:SETReflevels on page 1548
BUS<m>:FAUToset on page 1549
Bit rate
Sets the number of transmitted bits per second. The maximum bit rate for LIN is 20
kbit/s.
To select a bit rate from list of predefined values, tap the icon beside the "Bit rate" field.
To enter a specific value, open the keypad. The list of predefined values is also availa-
ble in the keypad.
If the "LIN standard" is "J2602", the bit rate is 10.417 kbit/s and cannot be changed.
Remote command:
BUS<m>:LIN:BITRate on page 1658
Polarity
Defines the idle state of the bus. The idle state is the recessive state and corresponds
to a logic 1.
Remote command:
BUS<m>:LIN:POLarity on page 1658
Show thresholds
If enabled, the threshold levels are displayed in the diagram.
Remote command:
BUS<m>:THReshold on page 1549
13.6.2.2 LIN display
Access: [Protocol] > "Display" tab.
LIN (option R&S
RTP-K3)
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