3-2
FRONT PANEL LAYOUT
The 681XXB front panel is divided into two main areas—the data dis-
play area and the data entry area. The following paragraphs provide a
brief description of the front panel controls, inputs, outputs, and data
display and data entry areas as shown in Figure 3-1. Detailed descrip-
tions of the data display and data entry areas are contained in para-
graphs 3-3 and 3-4.
Line Key
The line key provides for turning the sweep gener-
ator on and off. STANDBY (off) is indicated by an or-
ange LED; OPERATE (on) by a green LED.
Data
Display Area
The data display area consists of the data display
and the surrounding menu keys.
Data Display
The data display provides information about the cur-
rent status of the 681XXB in a menu display for-
mat. This information includes the operating mode
of the instrument, the value of the active frequency
and power level parameters, and the modulation
status.
Menu Keys
Menu keys provide for selecting the operating mode,
parameters, and configuration of the sweep gener-
ator.
LINE
RF OUTPUT
50
CAUTION
RF OUTPUT
MAY EXCEED 100mW
OPERATE
STANDBY
SYNTHESIZED
SWEEP
GENERATOR
Ω
OFF
ON
OUTPUT
2
3
1
6
5
4
9
8
7
0
dBm
Sec
GHz
dB
ms
MHz
kHz
s
µ
STEPS
ADRS
ns
Hz
MODULATION
AM IN
FM IN
IN
EXTERNAL
ALC IN
SYSTEM
MODULATION
BACK
SPACE
CLEAR
ENTRY
CW/SWEEP
SELECT
FREQUENCY
CONTROL
LEVEL/ALC
SELECT
LEVEL
CONTROL
Data Display
Data Entry
RF Output
Control
Key
Modulation
Connectors
External
ALC
Connector
RF Output
Connector
Line
Key
Menu
Keys
Figure 3-1.
Front Panel, 681XXB Synthesized Sweep Generator
LOCAL (FRONT
FRONT PANEL
PANEL) OPERATION
LAYOUT
3-6
681XXB OM
