2:1 Mixer Spur - HP 3336A Operating Manual

Model 3336A/B/C Adjustments
i. Adjust A3R69 for minimum modulation.
m. Adjust A3R33 for minimum modulation and adjust A3R68 for 0Vdc.
5-19. 2:1 Mixer Spur Adjustment.
Required Equipment:
impedance matching pad -hp- Model 85428B
spectrum analyzer -hp- Model 141T/8553B/8552B
@ a. Set the 3336 as follows:
Frequency ............ Perehdeeieas 10 MHz
Amplitude :s2.05.64.4vese040cseatecwees —2.99 dBm
Out PUP ia ene koe caw Sere 75 ohm
b. Set the 141T/3583B/8582B as follows:
Ranges. bccn sects towaiuewed 0 - 11 MHz
Center frequency ................... 10 MHz
Scan time ....... 2. cece ccs c cee seeens 1 msec/div
Bandwidth ................ 000 ee eee 30 kHz
Scan width.............. 0.000 ceca 0.05 MHz
Input attenuation ................... 0 dB
Log ref level .................0 00 eee -—10dB_ 10 dB/div
Video filter: <3su ae oad ee ae Saks 10 kHz
c. Connect the impedance matching pad between the 75 ohm output on the 3336 and the
spectrum analyzer's input.
d. Adjust the center frequency of the spectrum analyzer to center the signal and adjust
the log ref vernier to achieve a 0 dB signal.
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ae