Tektronix 2465B Operator's Manual

Operation
Frequency Measurement with
External Reference (Option 1E)
1. Connect a precision frequency standard signal (must have an accuracy better
than 10 ppm) to BNC connector EXT REF IN, located on rear panel. The
reference signal must be greater than 2 V peak-to-peak into a 50 Q or 75 Q
load with frequency of 1 MHz, 3.579545 MHz, 4.4336188 MHz, 5 MHz, or
10 MHz.
2. Select FREQUENCY as described above.
3. After 100 measurements (approximately 1 minute), the frequency readout will
display the applied input signal frequency in 8 digits.
Delay Sweeps by Event Counts
The Counter/Timer/Trigger (Option 09 or 06) includes delay-by-events for either the
A Sweep or the B Sweep. Event counting begins at a starting event on a vertical
input, defined by the A Trigger. Delay-counting events are defined by the B Trigger. In
addition, the available Word Recognizer (WR) can define either start or delay-counting
events. The combinations available are shown in Table 2-3.
Which Sweep to Delay
When the A Sweep is delayed by events, the event count can accumulate
for unlimited time. Then the B Sweep can be delayed by time to magnify
waveform details.
When the B Sweep is delayed by events, the event count must accumulate
during the A Sweep. Then the intensified A Sweep can show the timing
between the start event and the delay count.
2-28 2465B/2455B/2445B Operators

Tektronix 2465B Specifications

General

Bandwidth	400 MHz
Channels	4
Vertical Sensitivity	2 mV/div to 5 V/div
Maximum Input Voltage	400 V (DC + peak AC)
Display	CRT
Trigger Modes	Auto, Normal, Single
Time Base Range	500 ps/div to 0.5 s/div
Rise Time	875 ps
Power Supply	48 to 440 Hz
Dimensions	495 mm