Impulse Noise Dac Test - HP 4935A Operating And Service Manual

Tests
4-18.

IMPULSE NOISE DAC TEST

I :110 to HNC adapter
2.
SET IJI'
Set AC (L~librator signal source to 2 kHz at the levels given in Table 4-l 3 (start with 0.580 V)
4.
The 4!):{5A display should stop counting,
6.
7.
Set the LOW(SET) threshold to 90 dRrn (0 dHm).
Set the A(: (Ldibrator to 0.820 V; the 4!):<5A display should not count.
1 0 .
11. Set the A(: Calibrator to 0.920 V; the 4935A display should count.
1%.
Set the A(: Calibrator to I.299 V; the 41135A display should not count.
14. Set the AC Calibrator to 1.457 V; the 4935A display should count.
4-14
PERFORMANCE TESTS
AC CALIBRATOR
Figure 4-6. Impulse Noise DAC Test
to dual banana test cable
.
.
.
. .
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M O D E L 4 9 3 5 A
.
press both 6OOb2 buttons
. .
. . . press PER1011 to select NON-STOP
press I)ISPI,AY to select I,OW(SET)
press
. . .
adjust threshold to 90 d&n
. O N
RCV
. IMPULSE NOISE:
16 kHz I;I,AT Filter
START/RESET
Model 49XA