HP 4395A - Page 34

1. FREQUENCY ACCURACY TEST (NA)
Description
This test uses a frequency counter and a frequency standard to measure the actual frequency
of the HP 4395A RF OUT signal when it is tuned to 100 MHz. This test checks the frequency
accuracy of the internal frequency reference (or the high stability frequency reference for
Option 1D5).
Specication
Frequency reference accuracy
@23 6 5

C, referenced to 23

C ::::: :::: ::::: :::: ::::: :::: ::::: :::: :::: ::::: :::: ::::< 6 5.5 ppm
Precision frequency reference accuracy (option 1D5)
@0

Cto55

C, referenced to 23

C ::: ::::: :::: ::::: :::: ::::: :::: ::::: :::: :::: :::: < 6 0.13 ppm
Test Equipment
For testing a standard HP 4395A (not equipped without Opt. 1D5)
Frequency Counter :::: :::: ::::: :::: ::::: :::: ::::: :::: ::::: :::: :::: ::::: :::: ::::: :::
HP 5334B
BNC cable,61cm ::: :::: ::::: :::: ::::: :::: ::::: :::: :::: ::::: :::: ::::: :::: ::::: ::
PN 8120-1839
N(m)-BNC(f) adapter ::: ::::: :::: ::::: :::: ::::: :::: ::::: :::: :::: ::::: :::: ::::: :::
PN 1250-0780
For testing an HP 4395A equipped with Opt. 1D5
Frequency Counter :::: :::: ::::: :::: ::::: :::: ::::: :::: ::::: :::: :::: ::::: :::: ::::: :::
HP 5334B
Frequency Standard :::: :::: ::::: :::: ::::: :::: ::::: :::: ::::: :::: :::: ::::: :::: ::::: :
HP 5061B
1
BNC cable,61cm ::: :::: ::::: :::: ::::: :::: ::::: :::: :::: ::::: :::: ::::: :::: ::::: ::
PN 8120-1839
BNC cable, 122 cm ::: ::::: :::: ::::: :::: ::::: :::: ::::: :::: ::::: :::: :::: ::::: :::: :
PN 8120-1840
N(m)-BNC(f) adapter ::: ::::: :::: ::::: :::: ::::: :::: ::::: :::: :::: ::::: :::: ::::: :::
PN 1250-0780
1: The HP 5061B can be replaced with any 10 MHz frequency standard with time base error of
< 6 1x10
0 10
/year.
Procedure
1. Connect the test equipment as shown in Figure 2-1.
For testing a standard HP 4395A (not equipped with Option 1D5), do not connect any
cable to the EXT REF Input connector in the HP 4395A rear panel.
For testing an HP 4395A equipped with Option 1D5, connect a BNC(m)-BNC(m) cable
between the EXT REF Input connector and the REF O
VEN connector on the HP 4395A
rear panel.
2-2 Performance Tests