HP 5342A Microwave Frequency Counter

© Brooke Clarke 2010

Background
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HP 5342A Microwave Frequency Counter
HP 5342A Microwave Frequency Counter

Background

My prior frequency counters have a upper frequency limit below the microwave range and for some things it would be handy to have a counter with a higher upper frequency limit (18 GHz or 24 GHz).

Problem

Upon arrival the counter powered up and could count its own 10 Mhz Ref output, so seemed OK.  When it's front panel switch is turned to standby the oven stays heated.  After sitting overnight with the oven on, when the power switch was turned on the fuse (2A 125V) blew!  The fuse has been removed in the photo above.  Next to get the Operation & Service manual from Agilent (05342-90057 24.5 MB).

The 125 VAC fuse should be a 0.75 A and the 230 VAC fuse should be 0.375 A, so a prior owner has put in a much larger fuse (2A SB), indicating there's a progressive problem like leaking caps.

ID

s/n: 2636A11350
Options:
Option
Description
p/n
Installed
001
Hi Stab Time Base
10544A
Yes
002
Amplitude Meas
05342-60200
?
003
Extended Dynamic Range
05342-60201
?
004
Digital-to-Analog Converter
05342-60202
?
005
24 GHz (not with opt 2 or 3)
in s/n 1936A and up

?
006
Limiter

?
011
HP-IB
05342-60019
05342-60029
Yes
? is shown under installed because the newer model may have these as stock items?
001 High Stability Time Base HP 10544A
011 HP-IB

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page created 20 Feb 2010.