HP 8590 E-Series, Calibration Manual

Page: 334 / 693

45. Residual Responses , HP 8594EM
MEAS UNCAL Amplitude Error dB
9. Remove the cable from the EMC analyzer input.
10. Reconnect the termination to the EMC analyzer input as shown in
Figure 2-67.
11. Press the following EMC analyzer keys:
4 FREQUENCY 5 5 4 MHz 5
4 AMPLITUDE 5 47 4 dB V 5
4 SWEEP/TRIG 5
N
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
SWEEP CONT SGL (CONT)
12. Press 4 FREQUENCY 5 , then adjust the center frequency until the LO
feedthrough (the \signal" near the left of the screen) is just o the left-most
vertical graticule line . Press the following EMC analyzer keys:
4 FREQUENCY 5
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
CF STEP AUTO MAN (MAN) 9.8 4 MHz 5
4
DISPLA Y
5
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
DSP LINE ON OFF (ON) 17 4
dB V
5
A dd 17 dBV to the MEAS UNCAL Amplitude Error (recorded in step 8),
then set the display line to this value .
F or example , if the amplitude error in step 8 is 019.5 dB , add 17 dBV to
this value for a result of 02.5 dBV . Enter 02.5 dBV as the display line
value .
13. Press 4 SGL SWP 5 and wait for a new sweep to nish. Look for any residual
responses at or above the display line .
If a residual is suspected, press 4
SGL SWP
5 again. A residual response will
persist on successive sweeps , but a noise peak will not. Note the frequency
and amplitude of any residual responses above the display line and to the
right of the marker in T able 2-57 .
14. Press 4
FREQUENCY
5 , then 4
*
5 (step-up key) to step to the next frequency and
repeat
step 13.
15. Repeat step 14 until the range from 1 MHz to 2.9 GHz has been checked.
(This requires 295 additional steps .)
P erformance V erication T ests 2-305