Atec Agilent-81150A-81160A - Manual (Page 25)

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Logical strobe signal
The logical strobe signal is an internally generated signal that can be routed to the BNC
connector of Sync Out A or Sync Out B. For the two channel instrument, the logical strobe
signal is generated for both, channel 1 and channel 2.
The logical strobe signal has a different function, depending on the mode of operation.
If no advanced mode is selected, the logical strobe signal is constant low.
In advanced mode internal/external triggered or gated burst, the logical strobe signal
provides a signal indicating the duration of a burst. The rising edge of the logical strobe
signal is synchronized to the start of the fi rst waveform period in a burst. The falling edge
is synchronized to the start of the last waveform period in the burst.
In advanced mode sweep with the frequency marker off, the logical strobe signal is a
pulse with half of the duration of the sweep. The strobe signal goes high at the beginning
of the sweep.
In advanced mode sweep with the frequency marker on, the logical strobe signal goes
high at the beginning of the sweep and goes low at the marker frequency.
In advanced mode internally/externally modulated (AM, FM, FSK, PM, PWM), logical
strobe signal is the analog modulation waveform.
In pattern mode (block mode=On), the logical strobe signal goes high at the beginning
of the pattern and goes low at the last bit of the pattern. Refer to the User Guide for more
details.
Logical trigger signal 1/logical trigger signal 2
81160A
Pulse width
Internallly triggered, continuous
Externally triggered
50% duty cycle typ.
1.5 ns typ.
Maximum rate 330 MHz (1)
1) For output frequencies > 330 MHz, the trigger rate is ½ of the output frequency. In pattern mode with bit rate
> 330 MBit/s, the trigger rate is ½ of the output frequency. If a frequency sweep or a FSK frequency exceeds
330 MHz, the trigger rate is ½ of the output frequency.