Precautions Required When Connecting The 4287A To Automatic Equipment (Handler), Etc - Agilent Technologies Twelfth 4287A RF LCR Operation Manual

Precautions Required When Connecting the 4287A to Automatic Equipment
Precautions Required When Connecting the 4287A to
Automatic Equipment (Handler), etc.
When using the 4287A along with a handler or other automatic equipment in a system, pay
particular attention to the following points.
 When turning OFF the 4287A, be sure use the standby switch on the front panel or the
shutdown command from an external controller. For details, see "Turning the power
OFF" on page 38.
 To confirm the timing of all of the 4287A's operations and the automatic equipment (or
controller), use the 4287A's handler interface synchronizing signals (/INDEX, /EOM,
/READY_FOR_TRIG) and the status report mechanism to detect the condition of each
process and to control the automatic equipment synchronized with these signals. By
performing synchronization, trigger errors can be prevented and the measurement
throughput can be maximized. For details on how to make the timing with the
automatic equipment, see the Programming Manual.
 If you obtain DC resistance measurement with variance due to noise, it may be caused
by common mode noise which enters the 4287A via the test head cable and the GPIB
cable. To decrease this noise, insert the part where the cables of the test head are tied
into ferrite cores as many as possible (see Figure 2-25). If you connect a GPIB cable,
wind it around a core as many turns as possible (see Figure 2-26).
Use cores having large impedance at low frequency. The following table shows some
example of the cores which you can get as of December 2001.
For the test head cable
For the GPIB cable
 When performing calibration and compensation, it is recommended that you use the
internal raw data for calibration and compensation to determine the success or failure
of the calibration and compensation. For details, see the chapter "Preparations for
Accurate Measurement" in the Programming Manual.
 Do not rotate the cable to connect the SMA(male) connector to the test head. Rotating
the cable may cause damage to the cable's center conductor. Be sure to rotate the
connector nut to connect the SMA cable. For more details, refer to the "Caution for
connecting the SMA connector to the test head connector" on page 34.
Chapter 2
Toshiba FS26x16x10W
μ:
100000 @10 kHz
AL-value: 67.8 μH/N 2
Hitachi Metals F10080G
μ:
70000 @10 kHz
AL-value: 30.0 - 65 μH/N
Installation Guide
(Handler), etc.
@10 kHz
2
@10 kHz
47