HP 8340A Operating Manual page 55

RECEPTACLE FOR PRIMARY POWEi! CORD
VOLTAGE
OPERATING
LOCAL OPERATION OF THE HP 8340A SYNTHESIZED SWEEPER
Local operation is also called front-panel operation,
because the desired
initiated by pressing front-panel keys. The first keys
to press are those that cause an internal check of
the instrument, as described below.
PRELIMINARY CHECKS
Press and hold the
.
the red, green, and amber
arinunciators: Amber
functions are presently a�tive; the single green LED
indicates when the HP 8340A is sweeping (on
when sweeping, off during
crossings); and red indicates trouble. If any red LED
or annunciator turns on (such as OVEN or UN LK
seen at cold power-on), refer to the HP 8340A
Operating and Service
instructions.
Release the
standard slarting conditions:
MHz to GHz, at 0.0
26.5
at any time to achieve this
including those times you may need a "panic' but­
ton to unscramble all of those keystrokes that you
experimentally entered.
The disi;>lays are blank during the
check. To check the displays, press
'.
the key, which will cause every seg­
) : J T ;
� •
, · <:•, , .
ment of every display element to light followed by
a marching display of the entire character set.
To return to standard starting conditions, press
·
.
either. '; · · .
.
·
·
will turn off this or any other diagnostic display. A
MUOIJl.E
APPEARS IN WINDOW.
HP 8340A functions
.
key. Notice
.;> . '. ,
: >
•
(yellow) LEDs and
indicates which keys
retrace and band­
Manual for further
key, an d obse rve the
sweeping from 10
dBm. Press F· : � w>·: � -�: ' : : ;>::r<·;:;,� ; :'.
standard' 'condh:iun
, or: · ,. , · then,,
, · ,which
Scans by HB9HCA and HB9FSX
1. S
DE
LI
ANO PULL FUSE-PULL LEVER TO LEFT TO
REMOVE FUSE.
2. PULL OUT VOLTAGE-SELECTOR PC BOARD.
POSITION PC BOARD SO THAT VOLTAGE
NEAREST ACTUAL LINE VOLTAGE LEVEL
WILL APPEAR IN MODULE WINDOW. PUSH
l!OARD BACK
PUSH FUSE-PULL LEVER INTO ITS NORMAL
3.
RIGHT-HAND POSITION.
4.
CHECK FUSE TO MAKE SURE IT IS OF COR·
RECT RATING ANO TYPE FOR INPUT AC
LINE VOLTAGE. FUSE RATINGS FOR OIF ·
FERENT LINE VOLTAGES
BELOW
INSERT CORRECT FUSE IN FUSEMOLOEA.
5.
listing of the other diagnostic functions is contained
are in the HP 8340A Information Cards.
INFORMATION CARDS
Located below the front panel are information
cards that contain a summary of the local and
remote commands of the HP 8340A. Slide the
cards from their tray, and observe the format of the
information: The key-shaped symbols indicate the
front-panel keys that are pressed in local operation,
the letters and numbers next to the key-shaped
or
symbols are the programming commands used in
remote operation, and an explanation of the func­
tion follows the symbols and commands.
Under SHIFT KEY FUNCTIONS on the lower infor­
mation card, find
keystroke sequence youjust used to adivate the
display self test. Notice that there are several other
built-in diagnostic functions.
indicates an unlocked oscillator; this diagnostic is
usually called when the
:
lighted).
Feel free to try any of the functions described on
the information cards. The HP 8340A will not be
·
damaged if any keys are pressed in an incorrect
''"
sequence. Press
return to standard starting conditions.
CW OPERATION
CW operation is one of the major applications of
the HP 8340A, and is easy to implement using
front-panel keys. In the CW mode, the HP 8340A
outputs a single, low-noise, synthesized frequency.
3
OPEN POWER MODULE
COVER DOOR
N O
I T ITS SLOT.
·
ARE INDICATED
O R
P W E MODULE.
which is the
For example, press
which will display the condition
(a flashing
UNLK annunciator is
.f·;;f',;;_, ·_ , ;p:: _ ::.: . :'.,
at any time to
display