11-17
IM 704210-01E
Troubleshooting and Maintenance
11
Testing the A-to-B Interval Resolution
Instruments required
Prepare the following instruments.
• Synthesized signal generator
• Frequency range: 10 MHz to 50 MHz or higher
• Output level: 720 mV
rms
or higher
• Output level accuracy: 1.5 dBm or better
• Recommended instrument: 8657B synthesized signal generator (by HP)
• Power divider
• Characteristic impedance: 50
Ω
• Recommended instrument: 700966 power divider (by Yokogawa)
Test method for the A-to-B interval resolution 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 synthesized signal generator to the input terminal (CHA or CHB) of
the TA320 via the power divider.
• The coaxial cable used between the power divider and input terminal (CHA) and that used
between the power divider and input terminl (CHB) must have the same length.
8 65 7 B
TA320
YO KO G AWA
1 00 ps Resolu t ion 14 MS/ s
T im e In te rv al Analy ze r
CHA
TA320
Synthesized signal generator
(8657B)
REFERENCE IN
REFERENCE OUT
OUTPUT
CHB
POWER DIVIDER
Setting the instruments
• TA320:
• Sampling mode: Hardware histogram mode
• Input settings: DC coupling, 50
Ω
(both CHA and CHB), trigger level = 0V
• Function: A-to-B interval
• Gate: Event, 1000000
• Reference: External
• X CENTER, X SPAN
• When
A
B
or
A
B
Input Frequency
XCENTER
XSPAN
10MHz
100 ns
20 ns
20MHz
50 ns
20 ns
• When
A
B
or
A
B
Input Frequency
XCENTER
XSPAN
10MHz
100 ns
20 ns
20MHz
50 ns
20 ns
• Y HIGH
: 10
6
• 8657B:
• Frequency
: 10MHz
: 20MHz
• Level
: 720mV
rms
11.6 Carrying out the Performance Test