HP 4395A - Page 101

19. THIRD ORDER INTERMODULATION DISTORTION TEST
(SA)
Description
This test measures the spurious level generated by the HP 4395A's third order intermodulation
distortion at 100.2 MHz.
In this test, two signals are combined in the directional bridge and applied to the HP 4395A's R
input. A T/R test set is used as the directional bridge. The frequency of one signal is separated
from the other with 200 kHz. This test measures the level of the spurious products that appear
at a 200 kHz oset from the signals. The power level of the two signals is adjusted to 0 26
dBm. Therefore, each signal at the specied power level of 0 36 dBm is applied to the input
mixer through the HP 4395A's 10 dB input attenuator.
Specication
Third order inter-modulation distortion
@sparation  100kHz
1
::: ::::: :::: ::::: :::: ::::: :::: ::::: :::: :::: ::::: :::: ::::: :::: :< 0 70 dBc
1: two tones input with full scall input level
0 16 dB,
Test Equipment
Signal Generator ::: :::: ::::: :::: ::::: :::: ::::: :::: :::: ::::: :::: ::::: :::: ::::: :::: :::::
HP 8663A
Signal Generator :::: :::: :::: ::::: :::: ::::: :::: ::::: :::: ::::: :::: :::: ::::: :::: ::::: :::: :
HP 8642B
Power Meter ::: ::::: :::: :::: ::::: :::: ::::: :::: ::::: ::
HP 436A Opt. 022, HP 437B, or HP 438A
Power Sensor ::::: :::: ::::: :::: ::::: :::: :::: ::::: :::: ::::: :::: ::::: :::: ::::: :::: ::::: ::
HP 8482A
Two-Way Power Splitter :::: ::::: :::: ::::: :::: ::::: :::: ::::: :::: :::: ::::: :::: ::::: :::
HP 11667A
T/R Test Sets :::: ::::: :::: ::::: :::: ::::: :::: ::::: :::: ::::: :::: :::: ::::: :::: ::::: :::: ::
HP 85044A
50 Termination :::: :::: ::::: :::: ::::: :::: :::: ::::: ::::
HP 909C Opt. 012 or part of HP 85032B
Type-N Cable, 61 cm (three required) ::::: :::: ::::: :::: ::::: :
HP 11500B or part of HP 11851B
BNC cable, 122 cm (two required) :::: :::: ::::: :::: ::::: :::: ::::: :::: ::::: :::: ::::
PN 8120-1840
N(m)-N(m) adapter ::::: :::: ::::: :::: ::::: :::: :::: ::::: :::: ::::: :::: ::::: :::: ::::: :
PN 1250-1475
APC7.5-N(f) adapter ::: :::: ::::: :::: ::::: :::: ::::: :::: :::: :::: HP 11524A or part of HP 85032B
Tee BNC(m)-(f)-(f) adapter ::: ::::: :::: ::::: :::: ::::: :::: ::::: :::: :::: ::::: :::: ::::: PN 1250-0781
Procedure
1. Connect the test equipment as shown in Figure 2-28.
Note
Connect the signal generator's 10 MHz frequency reference output to the
HP 4395A EXT REF Input on the rear panel as shown in Figure 2-28 . With this
conguration, both the signal generator and the HP 4395A are phase locked to
the same reference frequency to obtain a stable measurement.
Performance Tests 2-69