Table of Contents
Advertisement
Drive Level Dependency Test (HP E4916A Only)
In this section, we use the HP E4916A to test the drive level
dependency of crystal resonator.
The HP E4916A searches for resonant frequency and crystal
impedance of the resonator while changing the drive level (test signal
level).
Also, the HP E4916A allows the following limit tests to be performed
based on the results obtained after search:
■ Limit test for measured value obtained at a specific drive level
■ Limit test for Fr and Cl at each drive level
Procedure
Specifying Frequency
lb search for resonant frequency Fr, enter the nominal resonant
frequency of the crystal resonator. In this section, we test the drive
level of a 20-MHz crystal resonator as an example.
1.
Sequentially press
[(blue)
and
fMeas Prmtr (did) j
to select the drive
level dependency (DLD) measurement mode. DLD appears at the
lower left corner of the LCD to indicate that the DLC measurement
mode has been selected.
2. Sequentially press
fFreq
),
(2),
(
0
), and
(/I/M
i to specify the frequency.
3- Press RNG:nnnnn and use keys on the ENTRY block to enter the
search range in ppm.
Specifying Drive Level Sweep Settings
When you wish to use keys on the front panel to specify drive level
sweep, specify the start and stop values for the drive level sweep
as well as the sweep type. Once the minimum/maximum values
and sweep type are specified, the HP E4916A uses its internally
predefined series of level values (1, 2, 3, 5, 8, 10, 20, 30, 50, 80, 100,
200, 300 ... ). That is, the HP E4916A automatically establishes all
the individual drive levels between user-specified minimum and
maximum drive levels.
You can also choose to start searching for the resonance point halfway
through sweep, not from the beginning of sweep (minimum drive
level). Or, you can specify wait time for each drive level so that the
HP E4915A/E4916A does not immediately start measurement after
having selected drive levels.
u Specifying Start and Stop Values
L Use flf^l and CgJ) to display MIR rnnnnnuW and
MAX :nnnnnuW . (murnnuW shows the current setting.)
2* Press MIN :nnnnnuW and use keys on the ENTRY block to enter
the sweep start (minimum) value.
Applications
Advertisement
Table of Contents
