1Mo Input Capacitance Adjustment - HP 3585A Service Manual

Adjustments
REF -26. 0 dBm
2 dB/ O I V RANGE -5. 0 dBm
CENTER 50 500. 0 Hz
RBW 300 Hz VBW
\�\=== == == == == == == == == == == == == =
REF -26. 0 dBm
2 dB/ O I V RANGE -5. 0 dBm
CENTER 50 500. 0 Hz
RBW 300 Hz VBW
Pro perly Adjusted C 2 1
5-43. 1 MO Input Capacitance Adjustment
a. Using the same connections as before, set the external attenuator for 40dB of attenua­
tion.
b. Replace the 500 termination with a l OkO series resistor ( ± 1 %, 1I8W, -hp- Part
Number 0757-0442). This resistor should be connected as shown in Figure 5-43 . Use short
clip leads to connect the resistor to the attenuator and the 3585A IMO input.
5-66
MARKER 50 500. 0 Hz
-33. 20 dBm
1 KHz ST 2. 2 SEC
Of
Range
MARKER 50 500. 0 Hz
-36. 00 dBm
-
-
-
- - -
-
L... .
_�_ c.. __ __
SPAN 99 000. 0 Hz
1 KHz ST 2. 2 SEC
Figure 5·42. 1 M O Low Frequency Flatmlss Adjustment
- -
REF -6. 0 dBm
2 dB/O I V RANGE 1 5. 0 dBm
==== == == == == == == == == == == == ==�/
Adjustment
REF -6. 0 dBm
2 dB/D I V RANGE 1 5. 0 dBm
---
- .- - - - - - - - - - - - + - - - -
CENT E R 5 0 SOO. O H z
RBW 30() H z VBW
Properly Adjusted C 2 7
Model 3585A
- .
MARKER 50 500. 0 Hz
i
- 1 7. 72 dBm
- -
--� -
,
,
- -
MARKER 50 500. 0 Hz
- 1 4. 86 dBm
--- -
- -
- - - - - - - - - -
SPAN 99 000. 0 Hz
1 KHz ST 2. 2 SEC