Agilent Technologies 53147A Assembly Level Service Manual page 40

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Chapter 1 Performance Tests
Test 3: Power Measurement
Press the Shift + dBm/W key on the Agilent 53147A, 53148A, or 53149A to
set the Power Meter to display readings in Watts, mW, and/or µW.
Set the Range Calibrator switches as follows:
FUNCTION: STANDBY
POLARITY: NORMAL
RANGE: 1 mW
LINE: ON
Press the Zero key on the Agilent 53147A, 53148A, or 53149A. When the
reading appears, verify that it is 0.00 ±0.06 µW.
Change the Range Calibrator's FUNCTION switch to CALIBRATE.
Press the Cal key on the Agilent 53147A, 53148A, or 53149A. Wait for the
Power Meter to complete calibration.
Verify that the Agilent 53147A, 53148A, or 53149A display reads
1.000 ±0.006 mW.
The Range Calibrator output level is adjustable in 5 dB increments.
Thus, the 3 µW, 30 µW, 300 µW, 3 mW, and 30 mW legends on the RANGE
switch are approximations. The true values for these settings are 3.16 µW,
31.6 µW, 316 µW, 3.16 mW, and 31.6 mW.
Set the Range Calibrator RANGE switch to each of the positions shown in
Table 1-3. For each setting, verify that the Agilent 53147A, 53148A, or
53149A autoranges properly and that the reading displayed is within the
limits shown in the table.
The lower the setting of the RANGE switch, the longer it takes for
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the reading to stabilize.
• You may have to repeat Step 5 (re-zero the instrument) for each
measurement.
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