HP 8559A - 7-21

ADJUSTMENTS
/ --
5 - 22.
3 dB BANDWIDTH ADJUSTMENTS (SERIAL PREFIX 1909A)
REFERENCE:
A9 Schematic
DESCRIPTION:
The 3
- dB bandwidths for the 3 MHz, 1 MHz and 300 kHz RESOLUTION BW settings are adjusted using the
CAL OUTPUT
as the signal source. The 3 - dB bandwidths for the 10 kHz, 3 kHz, and 1 kHz RESOLUTION
BW settings are adjusted by injecting a stable 321.4 MHz signal into the third converter of the spectrum
analyzer.
DISPLAY SIGNAL GENERATOR FREQUENCY COUNTER
EXTENDER
CABLE
- ), 11111, ,111,
13 SPECTRUM
ASSEMBLY
(2 I 3,
1) ( 3 ANALYZER
OUTPUT
FIGURE 5-8. 3dB BANDWIDTH ADJUSTMENTTESTSETUP
PROCEDURE:
1. Set spectrum analyzer controls as follows:
..................................................
FREQUENCY BAND GHz .01- 3
.................................................................
TUNING 35 MHz
.........................................................
FREQ SPAN/DIV 200 kHz
.........................................................
RESOLUTION BW 1 MHz
INPUTAmEN ............................................................. 20dB
...............................................................
REF LEVEL dBm 0
..............................................................
Amplitude Scale LIN
.........................................................
SWEEP TIME/DIV 1 msec
SWEEPTRIGGER ..................................................... FREERUN
VIDEOFILTER ............................................................. MIN
2. Connect equipment
as shown in Figure 5 - 8 except for signal input to AlOW 1. Connect CAL OUTPUT to
spectrum analyzer INPUT
5(X1.