Adjustments
Input LF-HF Gain
1.
Connect the instrument to the 5500A as shown. (See Figure 11.)
Figure 11: Input LF-HF gain test setup
2.
The display must show step CL 0654. If it does not, then press F1 or F2 to select the
fi
rst calibration step shown in
the table. (See Table 11.)
3.
Set the 5500A SCOPE output to source the signal required for the
fi
rst calibration point. (See Table 11.)
4.
Set the 5500A in operate (OPR) or standby (STBY) as indicated.
5.
Press F3 to start the calibration.
6.
Wait until the display shows calibration status :READY.
7.
Press F2 to select the next calibration step, set the 5500A to the next calibration point signal, and start the calibration.
Continue through all calibration points in the table.
8.
Move the generator signal cable to the next input channel on the instrument and repeat steps 3 through 7.
9.
When you are
fi
nished, set the 5500A to Standby.
Table 11: Input channel LF-HF gain calibration points
Calibration step
Ch 1
Ch 2
Ch 3
Ch 4
UUT input signal
5500A Setting
CL 0654
CL 0674
CL 0656
CL 0675
0.5 Vpp square wave, 1 kHz
SCOPE edge, 0.5 Vpp, 1 kHz
CL 0400
CL 0410
CL 0470
CL 0490
0.5 Vpp square wave, 1 kHz
SCOPE edge, 0.5 Vpp, 1 kHz
CL 0704
CL 0724
CL 0714
CL 0734
0.5 Vpp square wave, 1 kHz
SCOPE edge, 0.5 Vpp, 1 kHz
CL 0408
CL 0418
CL 0478
CL 0498
0.5 Vpp square wave, 1 kHz
SCOPE edge, 0.5 Vpp, 1 kHz
CL 0480
CL 0482
CL 0484
CL 0486
0.62 Vpp sine wave, 50 kHz
SCOPE levsine, 0.62 Vpp, 50 kHz
CL 0481
CL 0483
CL 0485
CL 0487
0.62 Vpp sine wave
THS3014: 141 MHz
THS3024: 221 MHz
SCOPE levsine, 0.62 Vpp
THS3014: 141 MHz
THS3024: 221 MHz
28
Technical Reference
