HP 70000 series - Preparing for Measurements

Preparing
the
Analyzer
for
Measurements
The
analyzer
requires
proper
connection
of
cables
,
as shown in the HP 70000 Modular
Spectrum
Analyzer
Installation
and
V
erication
Manual
.
Once the system cables are
connected,
most
analyzer
models
are
ready
for
use
after they have been calibrated, continue at
step
7.
The
following
procedure
provides
some preliminary checks for nonstandard analyzers.Follow
the
procedure
to
activate
the analyzer, and check its hardware and error-correction status.
1.
Apply
power
to
all mainframes and displays in the system by setting all LINE switches on
(1).
2. Wait about 5 seconds while the analyzer performs a self-check, then press the
instrument-preset key, 4
INSTR
PRESET
5 or 4
I-P
5 .
3. The analyzer is operating when a trace sweeps across the display. The MEASURE indicator
LED illuminates as the sweep progresses. As an additional indicator, the green, active
(ACT) status indicators are lit on the analyzer modules, except when the 4
DISPLA
Y
5 key has
been pressed. Also, if your analyzer has more than one signal path, for example, more than
one
RF input port or more than one IF module, the green status indicator may be o on
modules
not
passing or processing the input signal.
4.
If
your analyzer is sweeping, skip to step 5.
5.
If
the
analyzer
is
not
activated
when
power is applied, press 4
INSTR
5
,
N
N
N
N
N
N
N
N
N
N
N
NNNNNNNNNNNNNNNNNN
HP
70900B
.
(If
your
analyzer
does not have an 4
INSTR
5
key, press 4
DISPLA
Y
5
, then press
N
N
N
N
N
NNNNNNNNNNNNNNNNNNNNNNNNNNN
NEXT
INSTR repeatedly
until the analyzer is activated.) If the analyzer is still not activated when power is applied,
inspect the rear panel HP-MSIB interconnections for tightness and then cycle power.
If you cannot activate the analyzer, press 4
DISPLA
Y
5 ,
N
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
address map to inspect the
conguration
of
your
system.
Move
the
highlighted
rectangle
along
the
bottom
row
of
the
address
map
by
turning
the
front
panel
knob
.
The
local
oscillator
module
must be in the
bottom row of the map. If it is not, change the HP-MSIB row-address switch to row-address
0. See the HP 70000 Modular Spectrum Analyzer Installation and Verication Manual for
instructions
.
6.
Inspect
the
status
indicators on the front panels of the analyzer modules. If an error (ERR)
indicator is lit, press 4
DISPLAY
5 ,
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
REPORT ERRORS to learn what caused the error and clear
the error indication. Press 4
MENU
5 or 4
USER
5 to reactivate the analyzer display. If any
other error occurs, refer to the HP 70000 Modular Spectrum Analyzer Installation and
Verication Manual for installation, verication, and troubleshooting instructions. Refer to
Chapter 6 for a description of system error messages.
Note
For an analyzer with an external interface module for input, such as an
HP 70907A external mixer interface module
, connect any signal within the
frequency range of your external mixer
, and tune to that signal.
7. Verify that the analyzer can display signals sent to the RF INPUT port. Connect the
CALIBRATOR signal to the input port, then press the following keys.
Press 4
INSTR PRESET
5 (or 4
I-P
5 )
NNNNNNNNNNNNNN
Freq
NNNNNNNNNNNNNN
SPAN 1
NNNNNNNNNNN
MHz
NNNNNNNNNNNNNNNNNNNN
CENTER 300
NNNNNNNNNNN
MHz
Overview 1-7