Specifications

PERFORMANCE TESTS
1-6. TEST FREQUENCY ACCURACY TEST
This test verifies that the HP 4285A test frequency accuracy is within ±0.01 %. The accuracy
is specified for
an ambient temperature range of 23°C ±5 °C.
HP 4285A
ELECTRONIC COUNTER
D~DDDD~~
8 ~DDD 0
o 00
000
_ClClClOCICIO
o 0 0000 CI
CI CI CI CI CI CI CI CI CI
CI
CICICICI CI
CICICI ClCICICIOO
o 0 000i
CI
CICIO e
e
e
0
CI
I = I
.........
L...-J
L---I
BNC(m)-BNC(m) Cable. 61 em
Figure 1-1. Test Frequency Accuracy Test Setup
EQUIPMENT:
Electronic Counter
BNC(m)-to-BNC(m)
Cable, 61 cm
PROCEDURE:
HP 5334B
HP PN 8120-1839
1. Set up the equipment as shown in Figure 1-1.
2. Perform a
SYSTEM RESET as described on page 1-4.
3. Move the cursor to the
FREQ field.
L--J
4. Set the test frequency according to Table 1-3, and confirm that the counter read-
ings are within the test limits given in the table.
Table 1-3. Test Frequency Test limits
Test Frequency Test Limits
100 kHz 99.990 kHz to
100.010 kHz
149 kHz 148.985 kHz to
149.015 kHz
1 MHz
0.99990
MHz to 1.00010 MHz
10 MHz 9.9990
MHz
to
10.0010 MHz
16
MHz
15.9984
MHz to 16.0016
MHz
17 MHz 16.9983
MHz
to
17.0017 MHz
30
MHz 29.9970
MHz to 30.0030
MHz
1-5