HP 8340b Operating Instructions

Function Keys
DESCRIPTION
This group of keys selects frequency mode, power level, sweep time, and associated functions.
PANEL LAYOUT
FUNCTION
r-
1
< \
START
FREQ
1
r n
STOP
FREQ
FREQ STEF
/-\
CF
c .j
AF
^_ J
CW RES
LVl STEP
C s
CW
k.
POWER
LEVEL
v_>
ZOOM
o
z'
SWEEP
TIME
SHIFT
FUNCTIONS
[START FREQ] (HP-IB: FA) selects the start frequency for start/stop swept operation. Press
[START FREQ]; then use either the rotary [KNOB], the [STEP] keys, or the numerical keys with a
terminator key to set the desired value. The start frequency must be at least 100 Hz lower than the
stop frequency. If there is less than 100 Hz between start/stop, or if the start frequency is greater than
the stop frequency, the HP 8340B/41B will change the start or stop frequency to achieve the required
separation. The order in which start/stop is entered is not important. If start/stop mode is inter¬
changed with CF/AF mode (by pressing either of the start/stop keys and then either of theCF/AF keys)
the sweep limits are the same. The start frequency appears in the left FREQUENCY MHz display.
[SHIFT] [START FREQ] (HP-IB: SHFA) scales the frequency displays by a multiplication factor
of—30 to +30. This is used, for example, when a frequency doubler or tripler is connected to the RF
output of the HP 8340B/41B, and the display values are multiplied by a factor of two or three to
indicate the system output frequency. Press [SHIFT] [START FREQ], then enter the integer multi¬
plication factor (-30 to +30) followed by any terminator key. The selected multiplication factor effects
all frequency functions (start, stop, CF, AF, markers and marker functions, and the dB/GHz slope
function), but the factor is not stored in the SAVE/RECALL registers (the current factor is used when
recalling those registers). Cancel the multiplication factor by pressing [INSTR PRESET], or enter a
multiplication factor of 1. [SHIFT] [ALT] saves the current multiplication factor as the instrument’s
default value. In this mode, pressing [INSTR PRESET] or turning power off and on will not affect the
user-defined multiplication factor. This feature can be disabled by pressing [SHIFT] [INSTR PRESET],
which sets the default multiplication factor to 1 and presets the instrument.
Figure 3-7. Function Keys (1 of 3)
HP 8340B/41B
Operating Information
3-19

HP 8340b Specifications

General

Brand	HP
Model	8340b
Category	Inverter
Language	English