Checks and Adjustments
5-18 1705A Spectrum Monitor
15. Adjust Span/Div MagnifierR ange(R38 and R37)
16. Adjust IntensifiedZone Range (R61 and R36)
17. Adjust VerticalGain (R176, R239, R240, and R232)
18. Adjust 2 dB/Div Position (R140)
19. Adjust 590 MHz Notch (C69)
Figure 5-7 shows the 1705A SpectrumMonitor internal adjustment locations.
PRELIMINARYSETUP
Connect the 1705A ac power cord to the variableautotransformer. Turnthe
1705A power on. Setthe front-panel controls to start this procedure as
showninTable5--2.
Table5- 2: PreliminaryControl Settings
POWER ON
INTENSITY Set to Preference
FOCUS
SCALE
VERTICALPOSITI ON Set later
HORIZONTALPOSITION
INPUT 70MHz
RESOLUTION 300 kHz
VIDEO ON
SPAN/DIV FULL
CENTERFREQUENCY anywhere
SWEEP SPEED
y
A1 POWER SUPPLYBOARD
(Referto Figure5-7 for adjustment locations.)
1. Adjust +5 V
a. Connect the DMM negativelead to TP1 (GND) and the positive lead to
W1 (+5V).
b. ADJUST --R99 (+5V ADJ) for +5.0 V 0.5V.
Long Form Procedure