HP 8444A - Page 19

Model 8444A
OPERATING
PROCEDURE
WITH
AN
8554B
1. Check that the 115/230V switch is set to correspond
with the available line voltage. Refer to Figure 3-2,
steps 4 through 8, for switch and fuse information.
2. Apply power to Tracking Generator and Spectrum
Analyzer. =
3. Tum Spectrum Analyzer INTENSITY control fully
CCW.
4, Allow instruments to warm up for at least 30
minutes.
5. Perform Spectrum Analyzer “Calibration Proce-
dure”, Refer to 8554B RF Section Operating Man-
ual.
6. Set Spectrum Analyzer LOG/LINEAR controi to
LOG, LOG REF LEVEL to 0 dBm, and BAND-
WIDTH to 300 kHz.
7. Make the following interconnections between Track-
ing Generator and Spectrum Analyzer:
a. FIRST LO INPUT to FIRST LO OUTPUT.
b. THIRD LO INPUT to THIRD LO OUTPUT.
c. RF OUTPUT to RF INPUT.
d. SCAN OUTPUT to SCAN IN/OUT.
8. Check that the Spectrum Analyzer controls are set as
follows:
INTENSITY: une 12 o’clock (approx.)
FREQUENCY seca cie 30 MHz
BANDWIDTH xo nG BAGA are. 300 kHz
SCAN WIDTH PER DIVISION ............. 50 kHz
INPUT ATTENUATION . 2x cuco 10 dB
TUNING STABILIZER Yan cS es eos rats On
BASE LINE CLIPPER: eu KG ween eae as CCW
SCAN TIME PER DIVISION
10
1d.
12.
13.
14.
16.
and adjust TRACK ADJ for maximum signal ampli-
tude indication on CRT display.
„Adjust Spectrum Analyzer Vernier control or Track-
‚ing Generator LEVEL control to position signal on
CRT LOG REF level graticule line. (System cali-
brated at 30 MHz with an amplitude accuracy of
30.5 dB.)
Set Spectrum Analyzer to scan desired frequency
range. (FREQUENCY control adjusted to center of
frequency of interest, SCAN WIDTH set for desired
coverage.) i
insert device to be tested between Tracking Genera-
tor RF OUTPUT and Spectrum Analyzer RF
INPUT.
Rotate Tracking Generator MANUAL SCAN control
fully counterclockwise.
Set Spectrum Analyzer SCAN MODE switch to
EXT.
. Rotate Tracking Generator MANUAL SCAN control
elockwise to tune system through selected frequency
range.
For automatic scanning, set SCAN MODE switch to
INT and SCAN TIME PER DIVISION to desired
‘ scan time.
Figure 3-3. Tracking Generator Operation with 8554B Spectrum Analyzer (2 of 2)
Operation
EOG/EINEAR tagaan aha Lia ah gay aces LOG
LOG REF LEVEL nase teak Cee des 0 dBm
LOG REF LEVEL Vernier ........ooooooooooo.. 0
VIDEO FILTER A oa OOS Waka YON OFF
SCAN MODE. corista ls a INT
SCAN TRIGGER vtr NA aa LINE
9, Set Tracking Generator LEVEL control to 0 dBm
3-5