Fluke 9640A Series, Instruction Manual

Page: 73 / 324

Local Operation
Operating the Instrument
3
3-25
Table 3-7. Sweep Trigger Input Specifications
Parameter Specification Comments
Connector Type BNC Input Referenced to RF Common (floating)
Trigger Amplitude TTL , +5 V pk max Selectable as rising or falling edge
Input Impedance 10 k
Ω
Nominal
Time alignment
≤
1 ms Typical To start of sweep
Table 3-8. Sweep Trigger Output Specifications
Parameter Specification Comments
Connector Type BNC Input Referenced to RF Common (floating)
Output Pulse TTL (3 V) Selectable as rising or falling.
Typical duration 250 µs
Time alignment +14 to +16 ms Typical
From start of sweep
(delay ensures settled
signal level at the trigger point)
Table 3-9. Modulation Trigger Output Specifications
Parameter Specification Comments
Connector Type BNC Input Referenced to RF Common (floating)
Output Pulse TTL (3 V) Selectable as rising or falling edge
Time alignment ±500 ns Typical From modulation waveform zero crossing
(Sine) or positive peak (Triangle)
Operating the Instrument
This section of the manual contains operating instructions for the Instrument. Before
using these instructions, read the descriptions of the controls, indicators, and connectors
provided earlier in this chapter. These descriptions are sufficient to familiarize the user
with most of the general processes for operating the Instrument. These earlier
descriptions provide all of the information necessary to access, edit, and interpret general
screen information.
Before Starting
Before proceeding with the instructions in this section, complete the following procedure:
1.
Prepare the Instrument for operation. See Chapter 2.
2. Learn the function of and how to use each of the controls, indicators, and connectors
described earlier in this chapter.
3. Account for any rear-panel connections that may be required.
4. Set the power switch to on and set the Instrument to Standby (press

).
Approximately 4 seconds after switching on power, the Instrument runs a self-test.
Details of the power-on self test are given earlier in Chapter 2.