Operating instructions

LOCAL OPERATION
3-5
Fig. 3-2 Typical displays
The various keys on the front panel are grouped according to their use or located adjacent to
associated items.
(2) Soft keys. To each side of the display screen are six unmarked keys. These are the ‘Soft’ keys
referred to in the display description above. The specific function of each of these keys is defined
by the Service Monitor software and is indicated by the legend on the label immediately adjacent
to it on the display screen.
(3) Data Input keys. The right hand area of the front panel contains the ‘Data Input’ keys. These
keys are used to key in data for the various test parameters. They are arranged in three groups:-
Function keys on the left of the group are colored orange. They are used to define the parameter
to be addressed; frequency, level, increment change or memory store location; before any digits
are entered. The [ON/OFF] function key acts directly on the selected function.
Digit keys are in the center of the group and include the minus sign and decimal point. These two
keys have alternative symbols printed beneath them on the front panel which can be entered as
data where appropriate. No action other than a normal keypress is required, as only one of the
three options for each of these keys is relevant to the entry at any one time. The 'Delete' key
back-spaces over figures entered on the display to correct any errors. Corrections cannot be made
to an entry after a terminator key has been pressed for that entry. The original setting will be
retained if an entry is not completed. The incomplete entry will be replaced on the display by the
original setting when a keypress is made that confirms to the program that the setting being made
has been aborted.
Terminator keys used to conclude a parameter value are on the right of the group. They are
colored orange.
When setting a modulation level, the entry is completed using the Hz, kHz, MHz or % key. The
appropriate modulation type, FM or AM, is automatically selected.
(4), (5) & (6) RF input and output connectors.
The three sockets at the right hand edge of the front panel are the RF input/output connectors.
Refer to the Performance data section in Chapter 1 for measurement accuracy, maximum power
input levels and reverse power limits. The nominal impedance of all RF input and output circuits
is 50 Ω.
(4) ANTENNA connection. This is a female BNC connector, for 'Off Air' measurements and
monitoring, using a suitable antenna. This connector can also be used for direct input of low level
signals.
(5) BNC RF output connector. This provides output from the RF signal generator.