Wavetek 3000 Instruction Manual page 48

PERFORMANCE TESTS
4 .5 .2 Flatness Test
EQUIPMENT
4-8
Power Meter HP435A/8481A
and Sensor
3 .
Adjust the Signal Generator OUTPUT VERNIER for a +3 dBm
OUTPUT meter reading . Observe the power meter reading and
make a note
of the OUTPUT meter error to the nearest 0 .05
dB
(4
division) .
Continue to adjust the OUTPUT VERNIER for
OUTPUT meter reading increments of 1 dB between +3 and -7
dBm, and note the OUTPUT meter error at each reading . As
the test progresses make a note of the maximum OUTPUT meter
error to the nearest 0 .05 dB . The allowable error is ±0 .5
dB .
Record the maximum OUTPUT meter error on line 7 of the
PTR .
4 .
Set the Signal Generator OUTPUT step attenuatorto 0 dBm
and repeat step 3 above . Record the maximum
OUTPUT meter
error on line 8 of the PTR .
PROCEDURE 1 .
Set the Signal Generator controls as follows :
FREQUENCY selector 050 .000 MHz
MODULATION MODE CW
MODULATION FREQ (Inactive in CW MODE)
MODULATION FM/AM (Inactive in CW MODE)
OUTPUT VERNIER Fully Clockwise
OUTPUT step attenuator +10 dBm
2 .
Set the power meter to the +15 dBm range . Connect the
power sensor to the Signal Generator RF out connector .
3 .
Adjust the Signal Generator OUTPUT VERNIER for a +12
dBm power meter reading .
4 . Set the Signal Generator FREQUENCY selector in 10 MHz
steps between 10 and 520 MHz and observe the maximum change
in the power meter readings from
the +12 dBm reading in
step 3 .
The maximum allowable change is ±0 .75 dB . Record
the maximum change to the nearest 0 .05 dB
(k
division) on
line 9 of the PTR .
5 .
Set the Signal Generator FREQUENCY selector to 050 .000
MHz and adjust the OUTPUT VERNIER for a +3 dBm power meter
reading .
6 . Repeat step 4 above
except observe the maximum change
in the power meter readings from the +3 dBm reading in step
5 .
Record the maximum change from the +3 dBm reading to the
nearest 0 .05 dB on line 10 of the PTR .