Internal 10 Mhz Frequency Reference Adjustment; Adjustment Description; Required Equipment - Agilent Technologies E4406A VSA Series Service Manual

Post-Repair Procedures

Internal 10 MHz Frequency Reference Adjustment

Internal 10 MHz Frequency Reference
Adjustment

Adjustment Description

The Internal Frequency Reference adjustment measures an input
signal from a standard and adjusts the internal timebase. The source is
provided by a frequency standard with an output of 10 MHz. At the RF
input to the UUT, the source amplitude must be 0 dBm or less. The
internal frequency reference is adjusted to 10 MHz with minimum
deviation.
NOTE
This adjustment requires a minimum of a 24 hour warmup time. The
UUT must be turned on —not in standby— for the entire warmup
period.

Required Equipment

The following table lists the test equipment required for the
adjustment. The list includes any miscellaneous devices, cables, and
adaptors. Refer to
page
Table 5-2 Required Test Equipment
Frequency Standard
BNC
Type-N (m) to BNC (f)
The attenuation value
must provide a power
level of less then 0 dBm
at the UUT RF input.
248
Table 1-2, "Required Test Equipment Summary," on
18, for the critical specifications of the test equipment.
Instrument
Standards
Cables
Adaptors
Attenuator
20 dB Fixed Attenuator.
Recommended
Agilent Model
Number
5071A
10503A
1250-1476
8491A Option
Alternative
Agilent Model
Number
Chapter 5