11-13
IM 704210-01E
Troubleshooting and Maintenance
11
Testing the Frequency Resolution, Minimum Measured Value and Minimum Input Pulse
Width
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)
Test method for the input sensitivity 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.
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
TA320
Synthesized signal generator
(8657B)
REFERENCE IN
REFERENCE OUT
OUTPUT
CHB
CHA
Setting the instruments
• TA320:
• Sampling mode: Hardware histogram mode.
• Input settings: DC coupling, 50
Ω
(both CHA and CHB), trigger level = 0V
• Function: Period A, B
• Gate: Event, 1000000
• Reference: External
• X CENTER, X SPAN
Input Frequency
XCENTER
XSPAN
10MHz
100 ns
20 ns
20MHz
50 ns
20 ns
40MHz
25 ns
20 ns
50MHz
20 ns
20 ns
• Y HIGH: 10
6
• 8657B:
• Frequency
: 10MHz
: 20MHz
: 40MHz
: 50MHz
• Level
: 360mV
rms
11.6 Carrying out the Performance Test