HP 3580A - Frequency Calibration Procedure; Amplitude Calibration Procedure

Model 3580A
BASIC OPERATING PROCEDURES
Section III
3-194. Battery Operation (Option 001).
a. Connect the low {black) terminal of the front panel
INPUT connector to earth ground or to an appropriate
system ground.
b. Set the POWER switch to the ON {BAT) position.
The POWER light will illuminate.
c. Allow approximately 15 seconds for the CRT to
warm up. Adjust the INTENSITY and FOCUS controls for
a bright, clear presentation on the CRT. When the
instrument is initially turned on, the display may be similar
to the one shown in Figure 3-34. This display reflects the
preferred states of the storage elements in the digital
memory and is not meaningful. To clear the display, press
the CLEAR WRITE button.
d. Allow a warm-up period of at least 1 hour before
using the 3580A in a critical measurement application.
e. To· recharge the batteries, perform Steps a through d
of the power-line turn on procedure {Paragraph 3-193 ). Set
the POWER switch to the CHARGE position. The POWER
light will illuminate. The instrument cannot be used while
the batteries are being charged.
The instrument should not be left in the
CHARGE mode for prolonged periods. A
charge period of 14 hours is sufficient to
recharge a fully discharged battery pack. Ex-
tended periods of overcharge in ambient tem-
peratures exceeding 30" C ( 86° F) will severely
degrade battery life and capacity by causing the
cells to overheat.
3-195. Frequency Calibration Procedure.
3-196. The Frequency Calibration Procedure should be
performed after warm-up each time the instrument is
turned on. It should also be performed before and after
using the log sweep.
3-197. For operation in the Repetitive, Single or Manual
sweep mode, proceed as follows:
a. Turn the instrument on as outlined in Paragraph
3-192.
b. Set the 3580A controls as follows:
ADAPTIVE SWEEP ................. OFF
DISPLAY ..... STORE and BLANK STORE
Released
AMPLITUD~MODE ....... LOG 10 dB/DIV
AMPLITUDE REF LEVEL ....... NORMAL
dBv/LIN - dBm Switch ........... dBv/LIN
INPUT SENSITIVITY ............... CAL
VERNIER ...................... CAL
{Fully CW)
FREQUENCY ................. 00.0 kHz
START CTR .................... START
BANDWIDTH .................... 30 Hz
DISPLAY SMOOTHING ............. MIN
FREQ. SPAN/DN .................. N/A
SWEEP TIME/DIV ................. N/ A
SWEEP MODE ................... RESET
c. ·Clear the display by pressing the CLEAR WRITE
button.
d. Adjust the front panel ZERO CAL potentiometer for
peak zero response. (The zero response will appear on the
first line on the left-hand side of the display graticule.)
e. Set the BANDWIDTH to 10 Hz. Repeat Step d.
3-198. For operation in the Log sweep mode, proceed as
follows:
a. Set the 3580A controls as follows:
ADAPTIVE SWEEP ................. OFF
DISPLAY ..... STORE and BLANK STORE
Released
AMPLITUDE MODE ....... LOG 10 dB/DIV
AMPLITUDE REF LEVEL ....... NORMAL
dBv/LIN - dBm Switch ........... dBv/LIN
INPUT SENSITIVITY ............... CAL
VERNIER ...................... CAL
{Pully CW)
FREQUENCY ..................... N/ A
START CTR ...................... N/A
BANDWIDTH . . . . . . . . . . . . . . . . . . . 30 Hz
DISPLAY SMOOTHING ............. MIN
FREQ. SPAN/DIV .................. N/A
SWEEP TIME/DIV ................. N/ A
SWEEP MODE ............... LOG ZERO
b. Clear the display by pressing the CLEAR WRITE
button.
c. Adjust the front panel ZERO CAL potentiometer for
peak zero response. (The zero response will appear on the
first line on the left-hand side of the display graticule.)
3-199. Amplitude Calibration Procedure.
3-200. The Amplitude Calibration Procedure should be
performed initially after warm-up and each time the
BANDWIDTH setting is changed.
3-201. For operation on the 1 Hz or 3 Hz BANDWIDTH,
proceed as follows:
a. Tum the instrument on {Paragraph 3-192) and
perform the Frequency Calibration Procedure (Paragraph
3-195).
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