8003 Precision Scalar Analyzer
3-42 Manual 20791, Rev. C, June 2001
ations that must be observed. First, when the 8003
asserts AC MOD OUT high to indicate Ready for
Trigger, the test system must wait for at least 500
µ
s
before pulling the INPUT 1 trigger line high. Second, the
INPUT 1 trigger must be kept high for at least 500 m.
Modifier name: RFT
Modifier syntax: RFT
Description: The 8003 analyzer offers a very powerful and flexible CW measurement capability over
the GPIB bus. Four modes of CW measurements allow 1) slow readings with display
updates, 2) fast free-running measurements, 3) fast GPIB-triggered measurements, and
4) fast TTL-triggered measurements. Single channel reading rates in excess of 300
readings per second are achievable in the fast data modes. In addition, the fast GPIB and
TTL-triggered modes both allow the optional use of internal data buffers and bus or
hardware handshakes to maximize system throughput.
CW power measurements are made over the GPIB bus using the POWER command.
See the Fast-CW Mode Programming Example starting on page 3-43.
See the Tri-Triggered Fast-CW Mode Programming Example on page 3-47.
See the Fast Step CW Measurement Mode Programming Example on page 3-48.
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