HP 3580A Service Manual

Section V
ADJUSTMENT PROCEDURES
Model 3580A
d. Reposition the following front panel controls:
FREQUENCY ................. 05.0 kHz
SWEEP MODE ................. MANUAL
e. Adjust the rear panel TRACKING OSC LEVEL fully
CW, and set the EXT REF - NORMAL switch to NORMAL.
f. Connect the oscilloscope to the rear panel TRACK-
ING OSC OUT connector and monitor the output.
g. Adjust A2Rl13 (T.O. MIXER BALANCE) for the
cleanest signal. See Figure 5- 7.
Improper Adjustment
Proper Adjustment
Figure 5-7. Tracking Oscillator Output Adjustment.
5-84. Adaptive Sweep Marker Adjustment.
5-85. This adjustment properly positions the ADAPTIVE
SWEEP marker. If the marker (blank spot on screen) does
not appear at the same point on the display as new
information being written onto the display, do this adjust-
ment:
5-26
a. Position the following front panel controls: (Only
those controls printed in BOLD require a change from the
previous adjustments).
ADAPTIVE SWEEP ................. OFF
(Fully CCW)
DISPLAY ........ All pushbuttons released
AMPLITUDE MODE ..... LOG 10 dBV/DIV
AMPLITUDE REF LEVEL ....... NORMAL
dBv/LIN - dBm 600 Q ............ dBv/LIN
INPUT SENSITNITY ............... CAL
VERNIER (Amplitude) ............ CAL
(Fully CW)
FREQUENCY ................. 00.0 kHz
START-CTR ................... START
RESOLUTION BANDWIDTH . . . . . . 300 Hz
DISPLAY SMOOTHING ............. MIN
FREQ. SPAN/DIV ................ 2 kHz
SWEEP TIME/DIV . . . . . . . . . . . . . . .1 SEC
SWEEP MODE .................... MAN
Option 002: Set dBm 900 Q/LIN - dBm 600 Q
switch to dBm 900 D; set INPUT MODE
switch to UNBAL.
b. Adjust the MANUAL VERNIER control until the
trace is at the peak of the 10 kHz signal.
c. Momentarily press the DISPLAY-CLEAR WRITE
button. A dot should remain at the top of the scope.
d. Turn the ADAPTIVE SWEEP on and adjust A8R3
(SWEEP MARKER ADJ.) until the sweep marker (blank
spot in trace) blanks out the dot at the top of the scope.

HP 3580A Specifications

General

Brand	HP
Model	3580A
Category	Measuring Instruments
Language	English