Non-Harmonic Test - Wavetek 3000 Instruction Manual

EQUIPMENT
HP8554L/8552B/141T
PROCEDURE
1 . Set the Signal Generator controls as follows :
FREQUENCY selector 001 .000 MHz
MODULATION MODE CW
MODULATION FREQ
(Inactive)
MODULATION FM/AM (Inactive)
OUTPUT VERNIER
Fully Clockwise
OUTPUT step attenuator
+10 dBm
PERFORMAMCF TESTS
2 .
Connect the Signal Generator RF out connector to the RF
input of the spectrum analyzer .
3 . Set the spectrum
analyzer to measure the non-harmonic
content of the Signal Generator ouptut between 1 and 3 MHz .
Set the bandwidth to 30 kHz, the frequency span per division
to 1 MHz and the display to 10 dB/div .
Locate the zero
reference at the left edge of the graticule, and adjust the
fundamental to the log reference line (0 dB) in the display .
4 . Increase the setting of
the Signal Generator FREQUENCY
selector in 1 MHz steps between 1 and 3 MHz .
The non-har-
monics between 1 and 3 MHz should be 60 dB below the fun
damental .
Record the maximum non-harmonic observed in the
display between 1 and 3 MHz in dB below the fundamental on
line 21 of the PTR .
5 .
Set the spectrum analyzer to measure the non-harmonic
content of the Signal Generator output between 3 and 250 MHz .
Set the bandwidth to 300 kHz and the frequency span per div-
ision to 100 MHz .
6 .
Increase the setting of the Signal Generator FREQUENCY
selector in 1 MHz
steps between 3 and 10 MHz and in 10 MHz
steps between 10
and 520 MHz while observing the spectrum
analyzer display . Use the table below
to determine the
maximum non-harmonic
level in each of the frequency ranges
shown . Record the maximum non-harmonic level
observed in
each range indicated in the table on the applicable line
of the PTR.
Frequency Non-harmonic Non-harmonic Record Max
Range of Frequency Range Level (dB be- Non-harmonic
Fundamental
low fundamental) (Line number
(MHz)
MHz in PTR)
3-250 3-250
>65
22
3-350 3-350
>55 23
3-520
3-1000 >35 24