HP 3320A Operating And Service Manual page 105

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NOTE 1: Circled number indicates schematic number for circuit
shown.
NOTE 2: RESPONSE CONTROL: In local mode of operation,
response is always in "slow" mode (switches closed). In remote
mode response is in "fast" mode (switches open) unless pro·
grammed for "slow" mode. See Section III.
*
Troubleshooting Points For Functional Block Diagram
A1TP2 10 to 10.004 MHz; VERN at "00" (full ccw)
"'9999.9 MHz; VERN at "99" '" 10003.0 MHz.
FREQUENCY RANGE/SETTING
A3TP3
10MHz 1000 kHz 100 kHz 10 kHz 1000 Hz
0 Hz 0 Hz 0 Hz 0 Hz
o
Hz 20 MHz
5 MHz 500 kHz 50 kHz 5 kHz 500 Hz 25 MHz
10 MHz 1000 kHz 100 kHz 10 kHz 1000 Hz 30 MHz
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A2TP1
A3TP3
A7TP1
ABTP1
ASTP5
A11TP1
A12TP3
20-33 MHz Out
(Rear Panel)
Low Level Out
(Rear Panel)
1 MHz Out
(Rear Panel)
10 kHz; see waveform:
/l
/T]v
PodOd:
j
U
L
IOO}'uc:
The VTO frequency varies between 20 MHz
and 32.99 MHz depending on frequency set·
ling.
NOTE
Use a 10: 1 probe and a counter with high
sensitivity (-hp- 5245L with 5261 AI when
measuring frequency at A3TP3.
>
6
V p-p when unlocked, see Reference Oscil·
lator Adjustment procedure. section V.
20 MHz, 1.7 V pop.
18 MHz, 2 V pop.
+ 10.000 V dc at + 16.99 dBm setting.
+3.1659 V dc at + 17.00dBm setting. For
3320B with 50
n
output only.
On properly adjusted unit, typically
+
2 V de
but must remain within
±
.2 V with any ampli-
tude change with LEVELING ON.
Tracks output frequency, 20 MHz plus front
panel frequency setting.
>
100 mV rms into
50
n.
Same frequency as main output, between
50 mV and 158 mV rms into 50
n
depending
on amplitude level setting.
>
220 mV rms into 50
n.