Wavetek 3000 - Step Attenuator Accuracy Test

4.5.3 Step AttenuatorAccuracy Test
EQUIPMENT
Power
Meter

HP435A/8481A
and Sensor
Spectrum
Analyzer

HP8554L/8552B/141T
10 dB
Attenuator
Pad
20 dB Attenuator

Weinschel
50-20
Pad
30 dB Attenuator

Weinschel
50-30
Pad
40 dB Attenuator

Weinschel
50-40
Pad
WidebandAmplifier
HP8447D
26 dB
7 . Set
the Signal GeneratorFREQUENCY selector to 050 .000
MHz
and the OUTPUT step attenuator to 0 dBm . Adjust the
OUTPUT VERNIER for a -7 dBmpowermeter reading .
Weinschel 50-10
PROCEDURE

1 . Set the Signal
Generator controls as follows :
FREQUENCY
selector

520 .000 MHz
MODULATION
MODE

AM
MODULATION FREQ

VERNIER
MODULATION FM/AM

0% AM
OUTPUT VERNIER

Fully Clockwise
OUTPUT step
attenuator

0 dBm
PERFORMAMCF TESTS
2 . Set thepower
meter to the +10 dBmrange .

Connect the
power
sensor to the Signal Generator RF out connector .
3
.
Adjust the MODULATION FM/AM control of the Signal Gen-
erator for a +7 dBm power meter reading .
NOTE :

Increasing the MODULATION FM/AM
control setting in
thepreceeding step causes the OUTPUT
meter needle to
read
off
scale . This is normal .
8 .
Repeat
step 4 aboveexcept observe the maximum change
in the powermeter readings from the -7 dBm reading
in step
7 . Record the maximum change from the
-7
dBm
reading to the
nearest 0.05 dB on line 11 of thePTR .