Case K44 Spécifications télécharger pdf (Page 82)

User InterfaceGPS and Assisted GPS

68Operating Manual 1171.5248.12 ─ 15

Trigger Delay

Sets the trigger signal delay in samples on external triggering or on internal triggering via

the second path.

Sets the trigger signal delay in samples on external triggering.

This enables the R&S Signal Generator to be synchronized with the device under test or

other external devices.

For two-path instruments, the delay can be set separately for each of the two paths.

SCPI command:

[:SOURce<hw>]:BB:GPS:TRIGger[:EXTernal<ch>]:DELay on page 136

[:SOURce<hw>]:BB:GPS:TRIGger:OBASeband:DELay on page 133

Trigger Inhibit

Sets the duration for inhibiting a new trigger event subsequent to triggering. The input is

to be expressed in samples.

In the "Retrigger" mode, every trigger signal causes signal generation to restart. This

restart is inhibited for the specified number of samples.

This parameter is only available on external triggering or on internal triggering via the

second path.

For two-path instruments, the trigger inhibit can be set separately for each of the two

paths.

SCPI command:

[:SOURce<hw>]:BB:GPS:TRIGger[:EXTernal<ch>]:INHibit on page 136

[:SOURce<hw>]:BB:GPS:TRIGger:OBASeband:INHibit on page 134

3.6.2 Marker Mode

The marker output signal for synchronizing external instruments is configured in the

marker settings section "Marker Mode".

Marker Mode

Selects a marker signal for the associated "MARKER" output.

The marker signal is always related to the first active satellite.

"Navigation Bit"

A marker signal is generated for every navigation data bit (20460 C/A

chips)

"Word"

A marker signal is generated for every navigation data word (30 navi-

gation bits).

"Subframe"

A marker signal is generated for every navigation subframe (corre-

sponds to 10 words).

"1PPS"

A marker signal is generated for every start of second (GPS time).

The "Pulse Width" is set in the corresponding field. The input is

expressed as a number of chips.

While generating an offline GPS signal with R&S WinIQSIM2, this

marker signal is only enabled, if the "Doppler Shift" is set to 0.

Trigger/Marker/Clock Settings

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Case K44 Spécifications Page 82

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