HP 8340A Operating Manual page 89

Operating Information
DESCRIPTION
Continuous, single, or manual sweeps and internal, external or power line triggering are
controlled by these keys. Additionally, display blanking, penlift, and three diagnostic
functions are enabled by adding the SHIFT prefix to these keys.
PANEL LAYOUT
FUNCTIONS
(HP-IB:
[CONT]
8340A. The sweep is initiated by one of the TRIGGER functions, as explained later in this
Figure, while the sweep speed is controlled b y the
Figure 3-7.
[SHIFT] [CONT]
(turns oft) all displays on the HP 8340A. Although the displays are blanked, the functions
that are normally shown in the displays can still be changed in the usual manner, and the
changed values will be shown when the displays are reactivated. The displays are
reactivated in one of two ways:
press
[SHIFT] [MS]
that are in effect.
( HP-IB:
[SINGLE}
sweep, which will sweep at a rate determined by the
Figure 3-7). If
[SINGLE]
stop and the HP 8340A will retrace hack to the starting point.
[SHIFT] [SINGLE}
(I- I P-IB:
[MANUAL]
[KNOB] to manually sweep between the start/stop limits. In manual mode the HP 8340A
will not automatically retrace at the sweep end point (the operator must retrace), and the
green LED b y the SWEEP label will not light. The resolution of the
sweep span in either start/stop or CF/ �F mode. Frequencies in manual sweep are
synthesized, just as they are in CW mode.
3-22
8 B uMANUAl n
0
--- T RIGGER---
0
00 [EJJ �
Sl) allows continuous sweep-retrace-sweep-retrace cycling of the HP
(HP-IB: SHSl l disables displays, SHSlO re-enables displays) blanks
Press
[SHIFT] [CONT]
which always restores the displays and cancels any diagnostic routines
S2) allows single sweeps of the HP 8340A. Press
is pressed in the middle of a single sweep, the sweep will abruptly
has no effect on the HP 8340A.
S3) allows manual sweeps. Press
Figure 3-11. Sweep
Scans by HB9HCA and HB9FSX
0
SWEEP
0 0
0 0
[SWEEP TIME}
again to restore the displays, or
[SWEEP TIME]
[MANUAL],
and Trigger (1 of 3)
Modcl8340A
function as explained in
to start the
[SINGLE]
function (explained in
then use the rotary
is 0.1 % of the
[KNOB]