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Charge Amplifier
2651
Fixed Freq
.
1,2 MHz
Fixed Osc.
Ext.Var.Freq
.
1-1,2 MHz
Variable Osc
.
Level Recorder 2307
~
~
~·I
~
•
o~ ~u_!P~tE-_!O_v
_______ _
' - - - - - - - -
+.,@)
~.
--.=---
-
@
.
273166
Tracking Frequency
Multiplier
1901
Fig. 5. 1.
Example of equipment arrangement for harmonic analysis
999
399
z
~
100
2
~
u..
39
c:
.Q
"'
63s/decade
(.)
a.
~
10
:::l
~
3
20s/
decade
3,16
10
31,6
100
316
1k
Bandwidth
(Hz)
273132
Fig.5.2.
Variation of the mm1mum time to scan one decade with
2010 Bandwidth and 1901 Multiplication Factor N
5.2. DISTORTION MEASUREMENT CONTROL UNIT 1902
58
The 1 902 Distortion Measurement Control Unit provides the 201 0 with the facility to
perform swept-frequency distortion measurements on audio-frequency equipment and
systems. The combination facilitates measurement of harmonic, difference frequency
and intermodulation distortion to DIN 45 403 and IEC 268-3.
To record a swept-frequency distortion curve, proceed as follows.
1.
Connect up the equipment as shown in Fig.5.3. The three rear panel connections
on the 1902 and 2010 are between the sockets VARIABLE FREQUENCY, EXTER-
NAL VARIABLE FREQUENCY and FIXED FREQUENCY on both instruments.
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