HP 8756A How To Use

Q:
A:
Q:
A:
mode. It is not necessary for other
modes. Even LK / R can be used in an
alternate configuration, which ties
the HP 5344A sweep trigger to the HP
8350B STOP SWEEP input. This is the
optional configuration on page 3-37 of
the Operating and Service Manual.
Refer to that for details.
I don I t have the SMC sweeper inter face
cables. Is there a way I can count the
sweeper markers without them?
No . They are included in the HP 8350B
option 803 . You can also order them
separately (HP part n o. 11592-60001).
I need four BNe connectors for the sweep
and Z axis signals . Can't I elimi nate
some of them?
Yes , in some modes. Only Lock and Roll
requires all four . Narrowband sweeps
only require connections from the HP
5344S to the HP 8756A, and the
connections fr om the HP 8350B to the HP
5344S can be removed (se e figure 7).
HP 8756A
Scala Network Analvzer
,
HP 5344A Microwave
Source
Synchronizer
U III
0
0
0
0 I
qo l
0
000
Stop
I swee~ In 0·10 V
Z Axi5 Out J
Sweep
Swp Out
~~
J: 0
HP 8350B
Sweep Oscillator
Figure 7. Alternate rollling of display signals fo r
narrowband
sweeps.
In cw measurements, the sweep and Z axis
signals can go straight to the HP 8350B,
and no connections to the HP 53 44A front
panel are necessary (see figure 8).
Remember, though
r
that the original
configuration of figure 3 can operate
in any mode, and therefore is very
convenient.
HP 8756A
Scalar Network Analvzer
POS Z Blank
U III
0
SWI!eP In 0·10 V
0
000
Stop Sweep
HP 83506
Sweep Oscillator
Stop Sweep
Sweep Out/In
lfc
-
,I :
< 0
'0 0
pas Z Blank
HP 5344S Microwave
Soorce Synchronizer
Figure 8. Alternate r ou ting of display si~l1Qls in Ch ' mode.
11
QUESTIONS/ANSWERS REGARDING MARKERS
Q : Doesn't the HP 53445 generate markers?
Can those be displayed on the HP 8756A?
A: Yes, their operation is described in
the Operating and Service Manu.ai of the
HP 5344S. But they will not show up on
the display of the HP 8756A if the 8756
System Interface is operating .
Therefore, if you are using the 8756
System Interface, you will need to
disconnect it to view the HP 5344S
markers . If you disconnect, then
reconnect the interface bus, you wil l
need to preset the HP 8756A to enable
the interface again.
Briefly, the markers are set by
pressing [MKR FREQJ on the HP 5344A and then
the marker number 1-4. This displays the
present marker and allows you to enter a new
value or to adjust it with the knob. You
should then see the marker on the display as
long as the 8756 System Interface is not
operating.
Q:
A:
Q:
A:
Should I use the HP 8350B markers or the
HP 5344S markers?
It depends. Markers are generated by
the sweeping device. In narrowband
sweeps, the HP 5344S is sweeping, so its
markers should be used. In LK / R, the
HP 8350B is sweeping, so its markers
should be used.
In narrowband sweep, up to four
frequencies can be marked, and magni-
tude measurements can be made at very
accurate frequencies. In wideband
LK / R sweeps up to five points can be
marked, and the frequency can be
measured by the counter with high
accuracy.
So if I don't use the Interface Bus
because I want to use the HP 5344S mark-
ers , then I might as well use AUTO LOCK,
right?
Yes, because you don't use the 8756
System Interface in AUTO LOCK.
This is a good way to do narrowban d
sweeps, but can not take advantage of
the 8756 System Interface.
APPENDIX I
List of Documents
HP 534 4S Operating and Service Manual
HP part no . 05344-90009
HP 8756A Operating and Service Manual
HP part no. 08756-90001
HP 8350B Operating and Service Manual
HP part no. 08350 -90034
HP 5344S Micr owave Source Synchronizer HP
Product Note 5344S-1; HP lit. no. 02-
5952-7649
Operating Note:
ments using
Analyzer and
(HP part no.
Basic Network Measure-
8756A Scalar Network
8350B Sweep Oscillator
08756 -9 0001)

HP 8756A Specifications

General

Brand	HP
Model	8756A
Category	Measuring Instruments
Language	English