NF WAVE FACTORY WF1967, Instruction Manual (Operations

Page: 279 / 330

15.3 Performance Test
WF1967/WF1968 15-5
15.3 Performance Test

Performance Test
The performance test is performed as a part of preventive maintenance to prevent the product
performance from being deteriorated.
Perform the performance test when an acceptance inspection, a periodic inspection, or a performance
check after repair of this product is needed.
After the performance test, when the product does not meet the specification, it needs to be repaired.
Contact NF Corporation or one of our representatives.

Check before the performance test
Check followings before the performance test.

The power supply voltage is within the rated range.

Ambient temperature is within the range of +20 to +30°C.

Ambient relative humidity is within the range of 20 to 70%RH.

Non-condensing.

Warming up was performed for more than 30 minutes.

Preparations before performance test

Use a coaxial cable whose characteristic impedance is 50Ω, thickness is RG-58A/U or
more, and length is 1m or less, and has BNC connectors on both ends as a signal cable.

For items that 50Ω termination is specified, set the input impedance for connecting
instruments to 50Ω.

For instruments that cannot be set to 50Ω input, install 50Ω terminator (feed through
terminator) at the input of the instrument.

Measure a signal up to approx. 24dBm (when the amplitude setting is 20Vp-p/open). Use a
coaxial attenuator separately as needed not to exceed the allowable input of the
instrument. Note that especially the power meter (power sensor) and the spectrum
analyzer are damaged easily.

The setting contents for each test item contains the descriptions of items which should be
further changed after initializing the setting (perform [Reset]) in the Utility screen) and
turning the output on.
15.3.1 Frequency Accuracy Test
Connection:
FCTN OUT → Universal counter input (50Ω termination)
Use a coaxial cable.
Setting: Set the frequency to 1MHz and the amplitude to 10Vp-p/open after setting
initialization.
Measurement: Set the universal counter to the frequency measurement mode and measure the
frequency.
Judgment: It is normal when the value falls within the following.
However, the instrument may vary ±1ppm annually over the years. Therefore, if one
year has passed since the instrument was shipped, it may be deteriorated within ±4ppm
(999.996kHz to 1.000004MHz).
Rating range
0.999997MHz to 1.000003MHz