HP 532A - Page 4

Page 6
Model 532A/B
Table 4. Transfer Oscillator Frequencies (Other than 200 MHz)
Calibration Transfer Oscillator
Electronic Counter
Frequency
Frequency
Frequency
(GHz)
(MHz) (kHz)
3.95
197.5000 7500.0
4.10
195.2381 5238.1
4.30
195.4545
5454.5
4.50
195.6522 5652.2
4.70 195.8333
5833.3
4.90 196.0000
6000.0
5.10
196.1538
6153.8
5.30
196.2963
6296.3
5.50
196.4286 6428.6
5.70 196.5517
6551.7
5.85
195.0000 5000.0
7.05 195.8333
5833.3
8.50
197.6744
7674.4
c. Adjust the transfer oscillator and sweep oscillator
frequencies so that the beat signal between harmonics
of transfer oscillator frequency and the sweep oscilla
tor frequency is centered on the oscilloscope face,
d. Set532A/B #1 to the frequency of the sweep oscil
lator. The absorption dip should be on the beat signal.
This step checks that the proper beat signal has been
selected. If the dial of the 532A/B under test had
slipped and the wrong beat had been selected, the
532A/B could be calibrated erroneously without any
indication of this fact.
e. Adjust the frequency meter until the absorption
notch is centered exactly on the beat signal. Read the
frequency meter exactly. This indication should be
within the rated overall accuracy (see Table 1, Specifi
cations). Repeat on other frequencies. Consult Table 4
first for each frequency to determine the transfer
oscillator frequency. If the frequency is not listed use
200.000 MHz.
28. POWER DIP.
29. With the instruments connected as above, proceed
as follows:
a. Switch sweep oscillator LINE to STANDBY and
connect thermistor mount to the end of attenuator #2,
as shown in Figures 4 or 5.
b. Set the sweep oscillator for CW output at the
highest frequency in the band and zero set the power
meter on the 0 dBm range.
c. Tune the frequency meter for a maximum power
dip on the power meter. This dip should be 1 dB or
greater.
d. Repeat at the center of the band and the lowest
frequency.
30. If the frequency meter does not meet specifica
tions it will have to be returned to a Hewlett- Packard
repair center or the factory since special tools and
techniques are needed. Contact your nearest Hewlett-
Packard office.
00245-5