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Performance Tests
Model 3585A
4-to
4· 1 4. Reference Level Accuracy
This test verifies that the 3585A meets the specification for Reference Level Accuracy.
Specifications:
Reference Level Accuracy, Terminated Input
+ todB
-50dB
-70dB
± OAdB
± 0.7dB
Equipment Required:
Frequency Synthesizer . . . . . . . . . . . . . . . -hp- 3335A
Procedure:
a. Set the 3585A controls fote:
INSTRUMENT PRESET
RANGE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . O dBm
REFERENCE LEVEL . . . . . . . . . . . . . . . . . to dBm
REF L VL TRACK . . . . . . . . . . . . . . . . . . . . . , . . . off
1 dB/DIV
RES BW . . . . . . . . . . . . . . .
.
. . . . . . . . . . . . . . 100 Hz
VIDEO BW
.
. . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 Hz
MANUAL SWEEP . . . . . . . . . . . . . . . . . . . . . . . . on
b. Set the synthesizer controls for:
FREQUENCy . . . . . . . . . . . . . . . . . . . . . . . . 20 MHz
AMPLITUDE . . . . . . . . . . . . . . . . . . . . . . . . 10 dBm
AMPLITUDE INCR . . . . . . . . . . . . . . . . . . . to dBm
-90dB
± 1 .5dB
c. Connect the 500 output of the synthesizer to the 500 input of the 3585A.
d. Using the Reference Level Accuracy Test portion of the Operational Verification Test
Card, enter the marker amplitude reading into Column (C). Subtract the value in Column
(C) from that in Column (A) and enter this value in Column (D). The value in Column (D)
should not exceed the Test Tolerance of Column (E). This will confirm that the 3585A meets
its Reference Level Accuracy specifications.
e. Set the Synthesizer Level to the next value in Column (A) and the 3585A REFERENCE
LEVEL for the next value in Column (B) as shown on the Operational Verification Test
Card.
f. Repeat Steps d and e until all values on the card have been checked.
Summary of Contents for 3585A
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