HEWLETT-PACKARD 201C Instruction Manual

Section V Model 201C
b. Set Model 331A controls as follows:
hp ZOIC
AUDIO INPUT ....................... AF
OSCILLATOR
FREQUENCYRANGE .............. X1
VOLTMETER FREQUENCY dial ............... .50
FUNCTION ............. VOLTMETER
METER RANGE ........ .30 RMS VOLTS
c. On Model 201C set RANGE to X1 and frequenvy
dial to 50 (SO Hz).
d. Adjust output voltage levcl of Model 201C, with
vernier, to obtain 24.5 volts on Model 331A.
Figure 5-2. Frequency Response and Output Check
e. On Model 331A set FUNCTION to SET LEVEL,
METER RANGE to loo%, and adjust INPUT
Table 54. Frequency Response Check SENSITIVITY for 100% (full scale is 100%).
Range Dial Setting Tolcrance f. Set FUNCTION to DISTORTION and tune Model
~~
331A for null.
x10 20 -1 dB to +I dB
200 -1 dB to +I dB g. Set METER RANGE to 1% and retune for null.
x1 20 -1 dB to +I dB Reading should be less than 1/2% (full scalc is 1%).
200 -1 dB to +I dB
XlOO 20 -1 dB to +I dB h. Repeat steps a through g, except set Model 201C
200 -1 dB to +I dB RANGE to XlOO and frequency dial to 200
(20 kHz) and Model 331A FREQUE,NCY RANGE
to XIK and FREQUENCY dial to 20.
5-12. OUTPUT CHECK.
5-1 5. Three-Watt Output.
a. Connect test setup as shown in Figure 5-2, using a
600 ohm 3 watt load resistor. a. Connect test setup as shown in Figure 5-3,
including a 600 ohm 3 watt load resistor across the
b. Set the Model 201C Attenuation switch to 0 dB. output terminals of Model 201C.
c. Increase attenuation vernier in CW direction until b. Set Model 331A controls as follows:
the voltmeter reads 42.5 volts. This is an output of
3 watts. INPUT ...................... .AF
FREQUENCY RANGE ............. .XI
5-13. OlSTORTlON CHECK. FREOUENCYdial ................ 20 ~~
FUNCTION ................ .METER
5-14. One-Watt Output. METER RANGE ........ 100 RMS VOLTS
a. Connect test setup as shown in Figure 5-3, c. 00 Model 201C set RANGE to X1 and frequency
including a 6004hm load resistor across the dial to 20 (20 Hz).
output terminals of Model 201C.
d. Adjust output voltage level of Model 201C, wth
vernier,to obtain42.5 volts onModel331A.
hp201C
AUDIO e. On Model 331A set FUNCTION to SET LEVEL,
I OSCILLATOR
METER RANGE to loo%, and adjust INPUT
SENSITIVITY for 100% (full scale is 100%).
f. Set FUNCTION to DISTORTION and tune Model
331A for null.
g. Set METER RANGE to 1% and retune for null.
Reading should be less than 1% (full scale is 1%).
h. Repeat steps a through g, except set Model 201C
Figure 5-3. Distortion Check RANGE to XlOO and frequency dial to 200
5-2