Parts For Figure 5-3B - HP 467A Operating And Service Manual

Model 467A
TEST OSCILLATOR
h p
6518
@
o
427A-B-0623A
Lab Model 2645 - 1 KHz) , a 100 KHz Bandpass
Filter (White Instrument Lab Model 2645-100
KHz) , 40 and 600 ohm load resistors, and the
resistors and capacitors listed in Table 5-3
will be required for this test.
Table 5-3. Parts for Figure 5-3B
Designator -hp- P art No.
R I 0690-8231
R2 0692-5125
R3 2100-0006
C l
0121-0021
C2, C3 0160-{)439
C4, C5 0160-0474
L1 9140-0007
b. Connect the 1 KHz filter input to the output of
the 651B, Test Oscillator, using a 600 ohm
load. Connect the 331A Distortion Analyzer
directly to the Filter output as shown in Fig­
ure 5-3A Alternate connection.
c. Set the oscillator frequency to 1 KHz. Adjust
the output amplitude for the 1. 0 volt output.
d. Set the Distortion Analyzer Frequency to 1
KHz; FUNCTION to SET LEVEL; SENSI­
TIVITY to provide upscale
VERNIER for full scale reading of 1 ( 100%) .
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INPUT
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467A-B-0624B
FILTER SET
WHI TE
2 6 45 -IK
@
WHITE
Figure 5-3A.
Description
R: fxd 8 2,000 Q 1 W
R : fxd 5100 Q 2 W
R: var 5000 Q 2 W
C: var 5.5 pF to 64.3 pF
C: fxd 22 pF
C: fxd 390 pF
Inductor: var 60 -100 fJ. H
. deflection . Adjust
60-100}LH
C2
C4
390PF
-
Figure 5 -3B. 1 MHz Rejection Filter
h p 467A
POW ER AMPLIFI E R
;
0
Distortion Check
e. Rotate FUNCTION switch to DISTORTION.
Null out fundamental signal by alternately
reducing the meter range and adjusting
BALANCE and frequency control knob for a
null. Record the amount of distortion.
f. Disconnect the filter output from the 331A.
Connect the filter output to the 467A input.
Connect the 467A output to the 331A input
across a 40 ohm load, as shown in Figure 5-3A.
Set the 467A to XlO position.
g. Set the Distortion Analyzer FUNCTION to
SET LEVEL and adjust VERNIER for a full
scale reading of 1 (100%) .
h. Rotate the FUNCTION switch to DISTORTION
and find the null again. The new reading
should add les s than O. 01% ( 80 dB down) .
i. Repeat steps b through h using the 100 KHz
filter and 100 KHz frequency settings on the
651B and the 331A. Distortion added by the
467A at 100 KHz should be less than 1% (40
dB down) .
j. For checking distortion at 1 MHz, connect the
oscillator across a 600Q load to the 467 A input.
Connect the 467 A output across a 40 Q load to
the input of a 1 MHz band rejection filter, Fig-
8�I K
Cl
LI
C3
22PF
C5
390PF
R3
R2
5100.n 5000.n 2W
0692-5125 2100,... 0 006
5-3
Section V
DISTORTION ANALYZER
hp 331A
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OUTPUT
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