HP 8753E - A4 Sampler;Mixer Check

. . . . . . .
2. ‘Jet& on the andyzer md press [s) :~~~~~~~~~; ;*?a$ (46) Ixl]
_.........A.. -~~;~.............-/..........~.......... i............ ..__... u;...:.<
I
.,........... ..,.
..:.::: ._.:. . . . . . . . . . . . i,
.,
new analog bus correction constants. Then press
L45) Lxl) ~~~~
to
generate default
pretune correction constants
_ i . . . . . . . . . . . . . . . . . . .._... .: ,:..:
_ _ _ . . _ _
::. ...::--:.:.:.:. := . . . . x ; ..z<sy
.~~ _.
Press I&Z&) ~~~~:~~~,~ ‘Q&f& L48) Lxl) ~~~:...~~. 1-i to
-...- .._....._..... Asz.L.sA . . . . . . . . . . . . . .>.; _..... T .
.../....: ..-.... __; -.... /._i&.
generate new pretune correction constants.
3. Press m and observe the analyzer display:
a. No error message: restore the A9 CC jumper to the NRM position. Then
refer to “Post-Repair Procedures” in Chapter 14 to verify operation.
b. Error message visible: continue with “A4 Sampler/Mixer Check”.
A4 Sampler/Mixer Check
The A4, A5, and A6 (R, A and B) sampler/mixers are similar in operation. Any
sampler can be used to phase lock the source. lb eliminate the possibility of a
faulty R sampler, follow this procedure.
1. Remove the W8 cable (Al 1Jl to A4) from the R-channel sampler (A4) and
connect it to either the A-channel sampler (A5) or the B-channel sampler
(A6). Refer to F’igure 7-3.
7-6 Source Troubleshooting