Specifications

PERFORMANCE TESTS
3. Move the cursor to the CONFIG field, and press the 'Q Adapter' softkey to set the
H
P 4285A to Q measurement mode.
4. Perform a SYSTEM RESET as described on page 1-4.
5. Press the MEAS SETUP MENU key to display the MEAS SETUP page.
6. Move the cursor and set the HP 4285A as follows.
FREQ:
TUNE:
LEVEL:
TRIG:
1 MHz
FIX-C
150 mV
MAN
7. Press the DISPLAY FORMAT MENU key to display the MEAS DISPLAY page.
8.
Set the step attenuator to 0 dB.
9. Press the TRIGGER key, and record the Level Monitor Reading (V) in Calculation
Sheet column [Vo].
NOTE
While in the Q measurement mode, the level monitor indicates approxi-
mately
60 times the value of the input voltage.
10. Set the step attenuator to 20 dB.
11. Record the Level Monitor Reading
(V) in Calculation Sheet column [V20).
12. Calculate the measured value 20 LOG(VO/V20), and confirm the value is within
the
following specified test limits.
C.V. ± 0.086 [dB]
C.V.:Step Attenuator 20 dB Calibration value at 1 MHz
13.
Press the CATALOG/SYSTEM MENU key and the 'SYSTEM CONFIG' softkey to
display the
SYSTEM CON FIG page.
14. Move the cursor to the
CON FIG field, and press the 'OFF' softkey to set the
HP 4285A to Impedance measurement mode.
1-30