HP 8568B, Performance Tests And Adjustments Manual, Page: 32 / 313

3. Sweep Time Accuracy ms)
Equipment
Universal Counter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . HP
Digital Voltmeter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . HP
Procedure
Sweep Times ms
1. Connect equipment as shown in Figure 2-4.
2. Press
PRESET
)
on the spectrum analyzer.
3. Key in the following settings:
(
C E N T E R F R E Q U E N C Y
) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
500
[
F R E Q U E N C Y S P A N
]
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0
4. Set up the universal counter as follows:
a. Set all front panel keys in “out” position.
b. Set POWER switch to ON.
c. Set GATE TIME vernier control to 9 o’clock.
d. Set A switch to COM A position.
e. Depress T.I. A B switch (making sure the blue shift key is
out).
f. Set Channel A trigger level to trigger on negative slope.
g. Set Channel B trigger level to trigger on positive slope.
h. Set both Channel A and Channel B switches to
i. Connect the digital voltmeter to Channel A TRIGGER LEVEL
OUT. (Be sure to ground the DVM properly.)
j. Adjust Channel A trigger level to set a DVM voltage reading of
0.3 v.
k. Repeat steps i and j for Channel B.
5. Set analyzer
TIME
)
to 20 ms. Allow the universal counter
enough time to settle at this sweep time.
Performance Tests