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28 Chapter 1
Signal Generator Overview
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22. 10 MHz OUT
This female BNC connector outputs a nominal signal level of > +4 dBm and has an output impedance
of 50 ohms. The accuracy is determined by the timebase used.
23. STOP SWEEP IN/OUT
This female BNC connector (Option 007 only) provides an open-collector, TTL-compatible
input/output signal that is used during ramp sweep operation. It provides low-level (nominally 0 V)
output during sweep retrace and band-cross intervals. It provides high-level (nominally +5 V) output
during the forward portion of the sweep. Sweep stops when this input/output connector is grounded
externally. When operating as an input, the nominal impedance for this connector is less than
10 ohms. When operating as an output, the nominal impedance is approximately 4.2 kohms.
24. BASEBAND GEN CLK IN
This female BNC connector accepts a sine or square wave PECL clock input with a frequency range
of 200 MHz to 400 MHz, resulting in sample rates of 50 MSa/s to 100 MSa/s. The recommended input
level is approximately 1 Vpeak-to-peak for a square wave and 1 dBm to 6 dBm for a sine wave. This
allows baseband generators from multiple signal sources to run off the same clock.
25. Z-AXIS BLANK/MKRS
This female BNC connector (Option 007 only) supplies a +5 V (nominal) level during retrace and
band-switch intervals of a step, list, or ramp sweep. During ramp sweep, this female BNC connector
supplies a –5 V (nominal) level when the RF frequency is at a marker frequency and intensity marker
mode is on. This signal is derived from an operational amplifier output so the load impedance should
be greater than or equal to 5 kohms. This connection is most commonly used to interface with an
Agilent 8757D Scalar Network Analyzer.
26. SWEEP OUT
This female BNC connector outputs a voltage proportional to the RF power or frequency sweep
ranging from 0 V at the start of sweep and goes to +10 V (nominal) at the end of sweep, regardless
of sweep width.
The nominal output impedance is less than 1 ohm and can drive a 2 kohm load.
When connected to an Agilent Technologies 8757D network analyzer, it generates a selectable number
of equally spaced 1 ms, 10 V pulses (nominal) across a ramp (analog) sweep. The number of pulses
can be set from 101 to 1601 by remote control through the 8757D.