HP HP 81536A, Руководство пользователя, Страница: 15 / 30

D
I. A ccuracy T est
1. On both power meters:
a. Set the calibration factor to zero .
b. Set the wavelength to the wavelength of the laser source .
c. Set the instruments into MEAS mode . Make sure A UTOranging is o and
select the -20dBm range .
d. Set the averaging time to 500ms .
2. Make sure that the HP 8156A output is disabled. ZERO the DUT .
3. Connect the HP 8156A output cable to the standard head and ZERO the
standard meter .
4. Enable the HP 8156A output. Change the HP 8156A attenuation until the
power meter standard displays 10.00W .
5. Connect the attenuator output cable to the DUT . Check the DUT display and
note the result in the test record.
6. Repeat steps 1 to 5 at the second wavelength with the corresponding source .
II. Linearity T est
1. Make sure that the HP 8156A output is disabled. ZERO the DUT .
2. Enable the HP 8156A output.
3. On the DUT , switch o autoranging and select the -20dBm range . Set the
display to show results in dBm.
4. Alter the attenuation until the DUT displays -17.4dBm.
5. Press 4 Disp! Ref 5 , then 4 dB 5 .
6. Press 4 Up 5 to select the -10dBm range .
7. Note the deviation, displayed in dB , as R1 on the test record.
a. In the -10dBm range . Set the display to show results in dBm.
b. Alter the attenuation until the DUT displays -7.4dBm.
c. Press 4
Disp! Ref
5 , then 4
dB
5 .
d. Select the 0dBm range .
e. Note the deviation, displayed in dB , as R2 on the test record.
HP 81536A P erformance T ests D-5