A7 Lo Multiplier And Distribution Amplifier - Agilent Technologies 8564EC Service Manual

RF Section
A7 LO Multiplier and Distribution Amplifier
A7 LO Multiplier and Distribution Amplifier
YTO unlock errors may occur if the power delivered to the A15U100
NOTE
sampler is less than −9.5 dBm. Frequency response will be degraded in
both internal and external mixing modes if the output power is low or
unlevelled.
Connecting or disconnecting the A7 bias with the spectrum analyzer
CAUTION
power turned on will destroy the A7 assembly. Always press
turn the spectrum analyzer off before removing or reinstalling W12 to
either the A7 or A14J10.
ERR 334 may be displayed if the LO OUTPUT connector on the front
NOTE
panel is not properly terminated into a 50Ω termination.
Figure 12-3 A14J10, Solder Side of A14 (Ignore Pin Numbers on Mating
Connector)
1. Press
2. Connect a jumper between A14J10 pin 5 and A14J19 pin 6. Connect
3. Connect the positive lead of a DVM to A14J18 pin 14 and the
4. Press
5. The voltage measured on the DVM should be more negative than
6. Move the jumper from A14J18 pin 1 to A14J18 pin 2. The voltage
7. If the voltages do not meet the limits listed in steps 5 and 6,
8. Connect the positive DVM lead to A14J10 pin 1.
602
to turn the spectrum analyzer off. Disconnect W12 from
LINE
A14J10.
a jumper between A14J18 pin 13 and A14J18 pin 1. See
on page 602.
negative lead to A14J18 pin 6.
to turn the spectrum analyzer on.
LINE
−9.4 Vdc.
measured on the DVM should be more positive than +12.3 Vdc.
troubleshoot the A14 frequency control assembly.
to
LINE
Figure 12-3
Chapter 12