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11-8
IM 704210-01E
11.5 Adjusting the Time Base
CAUTION
• Never apply a voltage exceeding the maximum input voltage to the input terminals of the instruments.
Damage to the input terminals may result.
• Never short-circuit the output terminals of the instruments or apply an external voltage to them.
Damage to the internal circuits may result.
Instruments required
Prepare the following instruments.
• Standard frequency generator
• Frequency accuracy: 0.1 ppm or better
• Recommended instrument: 5065A (by HP)
• Frequency counter
• Frequency resolution: 1 Hz or better
• Recommended instrument: 5370B (by HP)
Adjustment method of time base (reference clock) using the above recommenced
instruments is given below.
Connecting the instruments
• Make sure that the power to each instrument is OFF, then connect the instruments to each other
as illustrated below.
• Connect the output of the standard frequency generator (5065A) to the FREQ STD INPUT
(provided on the rear panel) of the frequency counter (5370B), and measure the frequency of the
signal.
• Connect the REFERENCE OUT (provided on the rear panel) of the TA320 to the Input channel
Start of the frequency counter (5370B).
TA320
YOKOGAWA
1 00ps Resolut ion 14M S/ s
T im e Inte rv al Analy ze r
TA320
Frequency Counter
(5370B)
Standard frequency generator
(5065A)
REFERENCE OUT
FREQ STD INPUT
Input channel Start
OUTPUT(5MHz)
Setting the instruments
• TA320: None
• 5370B:
• Function: Frequency
• Gating time: 0.01 s
• Sample size: 1
• Statistics: MEAN
• Input channel Start: DC coupling,
÷
1, 50
Ω
, trigger level = PRESET, slope:
• FREQ STD: EXT
• 5065A: None
Adjustment method
• Wait for 30 minutes after the TA320 is turned ON.
• Turn the REF ADJUST (provided on the rear panel) of the TA320, to make sure that the
reading of the frequency counter is within the following range.
9.999990 MHz to 10.000010 MHz (10 MHz
±
10 Hz, within
±
1 ppm)