Rear Panel Description - Agilent Technologies PSA Series Service Manual

Troubleshooting the Processor, Power Supply, and Display

Rear Panel Description

Rear Panel Description
The following connectors are located on the rear panel of the
instrument:
PRE-SEL OUT. Preselected External Mixer Tune output, allows
tuning voltage for a Preselected mixer.
EXT REF IN. The external reference allows you to select an external
reference to phase lock all oscillators in the instrument. You can select
any external reference frequency between 1 and 30 MHz. The A11
Reference assembly then converts any external reference frequency to
10 MHz. An Ext Ref message will appear in the upper right hand
corner of the display when the external reference is selected. If no
external reference signal is applied, or if the operator does not enter the
correct value for the external reference frequency, a Frequency
Reference Unlock message will appear on screen.
10 MHz OUT (SWITCHED). The 10 MHz out allows you to lock other
test equipment to the same frequency reference that is being used by
the transmitter tester. The 10 MHz out signal is at +5 dB. Once the
10 MHz out is set to On, it will persist in an On state until an Off state
is selected.
2nd IF OUT. The 321.4 MHz IF signal is routed from the A10 3rd
Converter assembly. See the block diagram for power level with
−25 dBm input signal and 10 dB input attenuation.
70 MHz IF OUT. (Option H70 only) The 70 MHz IF OUT signal is
provided by the A33 70 MHz IF OUT assembly located in Option Slot 2.
With a −25 dBm input signal and 10 dB input attenuation, the 70 MHz
IF OUT signal should measure around −30 dBm.
TRIGGER OUT (1 + 2). Trigger outputs used to synchronize other test
equipment with the analyzer. Trigger 1 is the High+Sweeping (HSWP)
signal.
TRIGGER IN. Allows external triggering of measurements.
NOISE SOURCE DRIVE OUT +28V (PULSED). Provides +28V
supply for a noise source when Option 219, Noise Figure Measurement
is installed.
164 Chapter 7