Equipment; Spectrum Analyzer Adapters; Cable (Semi-Rigid Sma Male To Sma Male) - HP 8340B Manual

4-8. SPURIOUS SIGNALS TEST, 22 to 26.5 GHz (Applies only to HP 8340B)
(Cont'd)

Equipment

Local Oscillator
20 dB Attenuator
High Pass Filter (Made from the following adapters)l
APC 3.5 (f) to Waveguide
APC 3.5 (in) to Waveguide
Mixer
Spectrum Analyzer
Adapters
SMA (in) to BNC (f)

Cable (Semi-Rigid SMA male to SMA male)

It is important that the mixer be connected directly to the LO's RF Output
connector. For best results in this test, the local oscillator drive to the
mixer should be =-i-4 dBm.
Procedure
1. Connect equipment as shown in Figure 4-8. Allow at least a one hour warm up time. On the LO,
press [INSTRPRESET] and [PEAK](turns PEAK on).
2. Press
the DUT's
is not 0 dBm, enter [0] [dBmJ. P ress the [CW] key and enter any CW frequency in the 10
DISPLAY
MHz to 26.5 GHz range.
3. Determine all possible harmonic frequencies of the RF signal that could fall within the 22 to 26.5
GHz range. Press [SHIFT] [M2] to display from left to right; the band number (in POWER dBm
display) and the YO frequency. Determine all possible YO harmonic frequencies that could fall
within the 22 to 26.5 GHz range.
4. Press the LO [CW] key and enter a frequency 50 MHz below the harmonic frequency to be tested.
Press the [POWERLEVEL]
UNLEVELED indicator light comes ON. Slowly decrease the power level until the UNLEVELED
light just goes OFF.
[SAVE][1] on the DUT to save the current instrument state. Press [CW]
5. Press
harmonic frequency to be tested. Set the Spectrum Analyzer to view the 50 MHz IF signal with the
peak of the signal at the top graticule line.
6. Press [RECALL] [1] on the DUT to recall the original instrument state. The amplitude of the
harmonic displayed on the Spectrum Analyzer should be at or below the specified test.
7. Repeat steps 4 through 6 for each harmonic frequency determined in step 3.
8. Set the DUT to another CW frequency and repeat steps 3 through 7.
1. The waveguide portions of these adapters pass high frequencies and attenuate low frequencies.
HP 8340B/41B
[INSTRPRESET] Press [POWER LEVEL].
key.
key and, using
NOTE
If the
the rotary knob, increase the power level until the
HP 8340A/B Opt. 001
HP 8493C Opt 020
HP K281C
HP K281C Option 012
HP P/N 0955-0307
HP 3585A
HP P/N 1250-1 200
HP P/N 08340-20124
power level in the ENTRY
and enter the
Performance Tests 4-43/4-44