HP 8642A - Page 258

Performance Tests
4-8
Model 8642A/B
PERFORMANCE TESTS
4. In the readings taken above indentify the maximum (P max) and
minimum (P min) power levels. Compute the worst case flatness error
using the formula below. The value must be less than 0.75 dB.
___ dB
2
5. HET Band Level Accuracy
On the HP 8642 key in SPCL 8 to enable the HET Band. Change the
measuring receiver display to linear. Set the HP 8642 and measuring
receiver to
0.1 MHz. Set the HP 8642 to the amplitude levels given
in
the table below and verify that the readings are within the given
limits.
8642
Results (watts)
Band AMPTD
(dBm)
Min. Actual
Max.
HET +18 SO.12E-03
79.43E-03
+9.9
7.762E-03
12.30E-03
+5
2.510E-03
3.981E-03
0
794.3E-06
1.2S9E-03
-10 79.43E-06
12S.9E-06
-20 7.943E~-06
12.59E-06
6. Level Accuracy.
On the HP 8642 key in SPCL 0 to disable the HET band. Set the HP
8642 and the measuring receiver to the values given in the table
below. At all a dEm amplitude settings, change measuring receiver
measurement mode to Tuned RF, and on the HP 8642 key in I}l'CR
SET, 10 dBm. This will enable the step function to be used (see
Operating Fundamentals). Also, if measuring receiver is an HP
89 a 2A, ret urn to 0 dBm at the end of each band and store instrument
configuration as instructed in notes 2 through 7. Verify that the
power readings on the measuring receiver are within the specified
limits.