HP 3336A - Page 117

Performance Tests
4-32
d. Without changing any controls which will affect the reference level, tune the spectrum
analyzer to the following frequencies and measure their relative amplitude:
100kHz 1MHz 2MHz 30MHz
e. All spurious signals should be more than 70 dB below the reference level.
f. Set the 3336 sweep controls as follows:
SWEEP START FREQUENCY............. 0.000 eee 11 MHz
SWEEP STOP FREQUENCY............ 0... e eee eee 19 MHz
SWEEP TIME............ 0. ccc cece ccc cee c ec eeees 5 seconds
g. Set the spectrum analyzer controls as follows:
START FREQUENCY os sciceice s cvancan ee Sas See Vales 10 MHz
SCAN WIDTH ono. ddnis was owlo ena eee rae wi dace 1 MHz/DIV
BAND WIDT ivedecc Sie stedy eases saan 30 kHz
SCAN: TIME sic. edocs sek Gans ieee See ae ems 20 ms/DIV
h. Press the 3336 ‘SCONT”’ key.
i. Set the spectrum analyzer controls to display the 3336 output signal and a 2:1 mixer
spur. As the 3336 output signal sweeps from 11 MHz to 19 MHz the 2:1 mixer spur will
sweep from 19 MHz to 11 MHz. Measure the amplitude of the spur relative to the 3336 out-
put signal (reference level).
j. All spurious signals should be more than 70 dB below the reference level.
k. Connect the equipment as shown in Figure 4-10B.
1. Set the 3336’s amplitude to + 7.00 dBm (75 ohm) and frequency to 1 kHz.
m. Tune the spectrum analyzer to the 3336 output signal at 1 kHz and set a 0 dB reference
level. Using a battery powered spectrum analyzer enhances the accuracy of this part of the
test.
n. Without changing any controls that will affect the reference level, tune the spectrum
analyzer to the following frequencies and measure their amplitude relative to the 0 dB
reference level:
60Hz 120Hz 180Hz
o. All spurious signals should be more than 70 dB below the reference level.
p. Connect the equipment as shown in Figure 4-10C.
q. Set the 3336’s output amplitude to + 2.7 dBm (75 ohm) and frequency to 20.001 MHz.
r. Make sure the frequency references of both synthesizers are locked together and set the
reference synthesizer’s output amplitude to + 7.00 dBm (50 ohm) and frequency to 20 MHz.
s. Tune the spectrum analyzer to the 1 kHz signal from the mixer and low pass filter and
set a 0 dB reference level.
Model 3336A/B/C